+++ /dev/null
-# src/glu/mesa/Makefile
-
-TOP = ../../..
-
-include $(TOP)/configs/current
-
-GLU_MAJOR = 1
-GLU_MINOR = 1
-GLU_TINY = 0$(MESA_MAJOR)0$(MESA_MINOR)0$(MESA_TINY)
-
-C_SOURCES = \
- glu.c \
- mipmap.c \
- nurbs.c \
- nurbscrv.c \
- nurbssrf.c \
- nurbsutl.c \
- polytest.c \
- project.c \
- quadric.c \
- tess.c \
- tesselat.c
-
-OBJECTS = $(C_SOURCES:.c=.o)
-
-INCLUDES = -I. -I$(TOP)/include
-
-##### RULES #####
-
-.c.o:
- $(CC) -c $(INCLUDES) $(CFLAGS) $< -o $@
-
-##### TARGETS #####
-
-default:
- @if [ "${CONFIG_NAME}" = "beos" ] ; then \
- echo "$(GLU_LIB_NAME) not build under BeOS, but integrated into ${GL_LIB_NAME}." ; \
- exit 0 ; \
- else \
- $(MAKE) $(TOP)/$(LIB_DIR)/$(GLU_LIB_NAME) || exit 1 ; \
- fi
-
-$(TOP)/$(LIB_DIR):
- -mkdir $(TOP)/$(LIB_DIR)
-
-# Make the library:
-$(TOP)/$(LIB_DIR)/$(GLU_LIB_NAME): $(OBJECTS)
- @ $(MKLIB) -o $(GLU_LIB) -linker '$(CC)' -ldflags '$(LDFLAGS)' \
- -major $(GLU_MAJOR) -minor $(GLU_MINOR) -patch $(GLU_TINY) \
- $(MKLIB_OPTIONS) -install $(TOP)/$(LIB_DIR) \
- $(GLU_LIB_DEPS) $(OBJECTS)
-
-clean:
- -rm -f *.o */*.o */*/*.o
- -rm -f *.lo */*.lo */*/*.lo
- -rm -f *.la */*.la */*/*.la
+++ /dev/null
-# Makefile for GLU for GCC-2.95.2/Mingw32 contributed by
-# Paul Garceau <pgarceau@teleport.com>
-
-# Mesa 3-D graphics library
-# Version: 3.3
-# Copyright (C) 1995-1999 Brian Paul
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Library General Public
-# License as published by the Free Software Foundation; either
-# version 2 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-# Library General Public License for more details.
-#
-# You should have received a copy of the GNU Library General Public
-# License along with this library; if not, write to the Free
-# Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
-
-MESA_MAJOR=3
-MESA_MINOR=3
-MESA_TINY=0
-VERSION=$(MESA_MAJOR).$(MESA_MINOR)
-
-CFLAGS = -I. -DWIN32 -D__WIN32__ -D_WINDOWS \
- -O2 -funroll-loops \
- -fexpensive-optimizations -fomit-frame-pointer -ffast-math \
- -malign-loops=2 -malign-jumps=2 -malign-functions=2 \
- -mwindows
-CC = gcc
-MAKELIB = ar ru
-GLU_LIB = libGLU.a
-
-
-##### MACROS #####
-
-VPATH = RCS
-
-INCDIR = ../include
-LIBDIR = ../lib
-
-SOURCES = glu.c mipmap.c nurbs.c nurbscrv.c nurbssrf.c nurbsutl.c \
- polytest.c project.c quadric.c tess.c tesselat.c
-
-OBJECTS = $(SOURCES:.c=.o)
-
-
-
-##### RULES #####
-
-.c.o:
- $(CC) -c -I$(INCDIR) $(CFLAGS) $<
-
-
-
-##### TARGETS #####
-
-# Make the library:
-$(LIBDIR)/$(GLU_LIB): $(OBJECTS)
- $(MAKELIB) $(GLU_LIB) $(MAJOR) $(MINOR) $(TINY) $(OBJECTS)
\ No newline at end of file
+++ /dev/null
-# Mesa 3-D graphics library
-# Version: 3.5
-#
-# Copyright (C) 2001 Wind River Systems, Inc
-
-# The MIT License
-# Permission is hereby granted, free of charge, to any person obtaining a
-# copy of this software and associated documentation files (the "Software"),
-# to deal in the Software without restriction, including without limitation
-# the rights to use, copy, modify, merge, publish, distribute, sublicense,
-# and/or sell copies of the Software, and to permit persons to whom the
-# Software is furnished to do so, subject to the following conditions:
-#
-# The above copyright notice and this permission notice shall be included
-# in all copies or substantial portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
-# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
-# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
-# DEALINGS IN THE SOFTWARE.
-
-# Makefile for GLU library
-
-##### MACROS #####
-GLU_MAJOR = 1
-GLU_MINOR = 3
-GLU_TINY = 0$(MESA_MAJOR)0$(MESA_MINOR)0$(MESA_TINY)
-
-##### RULES #####
-
-include ../rules.windml
-
-GLU_SOURCES = \
- glu.c \
- mipmap.c \
- nurbs.c \
- nurbscrv.c \
- nurbssrf.c \
- nurbsutl.c \
- polytest.c \
- project.c \
- quadric.c \
- tess.c \
- tesselat.c \
- ../src/windml/tornado/torMesaGLUInit.c
-
-GLU_OBJECTS = $(GLU_SOURCES:.c=.o)
-GLU_OBJNAME = $(MESA_LIBDIR)/objMesaGLU.o
-
-SOURCES = $(GLU_SOURCES)
-
-##### TARGETS #####
-
-all: depend.$(CPU)$(TOOL) $(GLU_OBJNAME)
-
-# Make the GLU library
-$(GLU_OBJNAME): $(GLU_OBJECTS)
-# $(LD) -r $(GLU_OBJECTS) -o $(MESA_OBJNAME)
- $(LD) -r $(GLU_OBJECTS) -o $(GLU_OBJNAME)
-# $(AR) rus $(MESA_LIBNAME) $(GLU_OBJNAME)
-# $(AR) rus $(VX_LIBNAME) $(GLU_OBJNAME)
-
-depend.$(CPU)$(TOOL):
-ifeq ($(WIND_HOST_TYPE),x86-win32)
- @ $(RM) $@
- @ $(ECHO) Creating depend.$(CPU)$(TOOL)
-ifneq ($(SOURCES),)
- @ for %f in ($(SOURCES)) do \
- $(CC) -MM $(CFLAGS) %f >>$@
-endif
-else
-Makefile
- @ $(RM) $@
- @ $(ECHO) "Creating depend.$(CPU)$(TOOL)"
-ifneq ($(SOURCES),)
- @ for FILE in $(filter-out $(NODEPENDOBJS), $(SOURCES)); \
- do \
- $(CC) -MM $(CFLAGS) $$FILE \
- | $(TCL) $(BIN_DIR)/depend.tcl $(TGT_DIR) >>$@; \
- done
-endif
-endif
-
-.PHONY = clean
-
-clean:
-# $(AR) d $(MESA_LIBNAME) $(GLU_OBJNAME)
-# $(AR) d $(VX_LIBNAME) $(GLU_OBJNAME)
- $(RM) $(GLU_OBJNAME)
- $(RM) $(GLU_OBJECTS)
- $(RM) depend.$(CPU)$(TOOL)
-
-include depend.$(CPU)$(TOOL)
+++ /dev/null
-LIBRARY GLU32
-DESCRIPTION 'GLU for Windows Mesa'
-EXETYPE WINDOWS
-CODE MOVEABLE DISCARDABLE
-DATA MOVEABLE SINGLE
-HEAPSIZE 256000
-
-STACKSIZE 4096
-
-EXPORTS
- gluLookAt
- gluOrtho2D
- gluPerspective
- gluPickMatrix
- gluProject
- gluUnProject
- gluErrorString
- gluScaleImage
- gluBuild1DMipmaps
- gluBuild2DMipmaps
- gluNewQuadric
- gluDeleteQuadric
- gluQuadricDrawStyle
- gluQuadricOrientation
- gluQuadricNormals
- gluQuadricTexture
- gluQuadricCallback
- gluCylinder
- gluSphere
- gluDisk
- gluPartialDisk
- gluNewNurbsRenderer
- gluDeleteNurbsRenderer
- gluLoadSamplingMatrices
- gluNurbsProperty
- gluGetNurbsProperty
- gluBeginCurve
- gluEndCurve
- gluNurbsCurve
- gluBeginSurface
- gluEndSurface
- gluNurbsSurface
- gluBeginTrim
- gluEndTrim
- gluPwlCurve
- gluNurbsCallback
- gluNewTess
- gluDeleteTess
-; gluTessBeginPolygon
-; gluTessBeginContour
- gluTessVertex
-; gluTessEndContour
-; gluTessEndPolygon
-; gluTessProperty
-; gluTessNormal
- gluTessCallback
-; gluGetTessProperty
- gluBeginPolygon
- gluNextContour
- gluEndPolygon
- gluGetString
-
+++ /dev/null
-
-Notes on the GLU polygon tesselation facility implemented by Bogdan Sikorski...
-
-
-
-The tesselation module is provided under the same terms as the Mesa
-package.
-
-This is the first release of polygon tesselation code for Mesa.
-It was written during my very little free time, so lets name it:
-"its not perfect". If someone hates pointers, don't look at the code.
-I preffer dynamic allocation versus static. But _all_ ideas, suggestions,
-bug reports and fixes are welcome (if You want, also flames). I am aware
-that many things could have been written using better techniques, but time
-that I could devote to this library was very limited. It is not well commented,
-excuse me. Also I am thinking of continuing working on this code to improve,
-fix and polish it. And make it as compliant as possible to the OpenGL, so
-software ports from OpenGL to Mesa will work correctly. If You know of any
-differences in behaviour, expected input/output between Mesa tesselation library
-and OpenGL, please send me a note. I explain later on why I am not
-confident with this code.
-
-I tried to be fully compliant with the OpenGL routines. By "tried" I mean that
-up to my knowledge it behaves as OpenGL tesselation routines. Just recently
-I began to experiment with OpenGL (actually only Mesa), and also have
-no access to any machine providing official implementation of OpenGL,
-nor access to books (particulary Addison-Wesley publications). Thus my
-knowledge on how the original tesselation code works, what kind of data
-it expects etc. is based _only_ on the publicly available documentation
-provided by SGI. Namely:
-
-* "The OpenGL Graphics System Utility Library" by K.P.Smith
- (Silicon Graphics, 1992)
-* "The OpenGL Graphics Interface" by M.Segal and K.Akeley
- (Silicon Graphics, 19??)
-* "OpenGL and X, Part 1: Introduction" by M.J.Kilgard
- (Silicon Graphics, 1994)
-* "OpenGL and X, Part 2: Using OpenGL with Xlib" by M.J.Kilgard
- (Silicon Graphics, 1994)
-* "OpenGL Graphics with the X Window System" by P.Karlton
- (Silicon Graphics, 1993)
-* Online Docs - Appendix C of OpenGL Programming Guide, Polygon Tesselation
- (partial text cut and sent by e-mail)
-
-
-The tesselation routines use slightly different prototypes than the ones
-specified in the mentioned above publications. The _only_ differences are
-the enumeration types which are not GLenum, but are GLUenum. So the
-implemented routines have following prototypes:
-
-GLUtringulatorObj *gluNewTess(void);
-
-void gluTessCallback(GLUtriangulatorObj *,GLUenum,void (*)());
- ^^^^^^^
-void gluBeginPolygon(GLUtriangulatorObj *);
-
-void gluTessVertex(GLUtriangulatorObj *,GLdouble [3],void *);
-
-void gluNextContour(GLUtriangulatorObj *,GLUenum);
- ^^^^^^^
-void gluEndPolygon(GLUtriangulatorObj *);
-
-const GLubyte *gluErrorString(GLUenum);
- ^^^^^^^
- prototypes for callback functions:
-
-void <begin>(GLUenum);
- ^^^^^^^
-void <edgeFlag>(GLboolean);
-void <vertex>(void *);
-void <end>(void);
-void <error>(GLUenum);
- ^^^^^^^
-
-The begin callback will be called only with GLU_TRIANGLES. No support
-for traingle fans or strips yet.
-
-In case of errors an internal error variable is set to the appropiate
-error enum values (GLU_TESS_ERROR?). Initially it is set to GLU_NO_ERROR.
-The OpenGL library provides 8 error conditions, the tesselation code
-of Mesa provides 9. They are:
-
-GLU_TESS_ERROR1: missing gluEndPolygon /* same as OpenGL */
-GLU_TESS_ERROR2: missing gluBeginPolygon /* same as OpenGL */
-GLU_TESS_ERROR3: misoriented contour /* not used in Mesa
- in OpenGL is bad orientation or intersecting edges */
-GLU_TESS_ERROR4: vertex/edge intersection /* same as OpenGL */
-GLU_TESS_ERROR5: misoriented or self-intersecting loops /* same as OpenGL */
-GLU_TESS_ERROR6: coincident vertices /* same as OpenGL */
-GLU_TESS_ERROR7: colinear vertices /* OpenGL's illegal data */
-GLU_TESS_ERROR8: intersecting edges /* same as OpenGL */
-GLU_TESS_ERROR9: not coplanar contours /* new for Mesa */
-
-The Mesa tesselation code ignores all data and calls after detecting an error
-codition. This means that a _new_ tesselation object must be used for further
-triangulations. Maybe this is too restrictive, and will be lifted in
-future versions.
-
-The tesselation code completely ignores the type parameter passed in
-gluNextContour. It also doesn't check if the passed parameter is a legal
-enum value - ignores silently (maybe at least this should be checked).
-The reason I chose this behaviour is based on what I read in the
-beforementioned documents. I cite:
-
-"....
-void gluNextContour(GLUtriangulatorObj *tessobj, GLenum type);
-
-Marks the beginning of the next contour when multiple contours make up the
-boundary of the polygon to be tessellated. type can be GLU_EXTERIOR,
-GLU_INTERIOR, GLU_CCW, GLU_CW, or GLU_UNKNOWN. These serve only as
-to the tessellation. If you get them right, the tessellation might
-go faster. If you get them wrong, they're ignored, and the tesselation still
-works.
-....."
-
-I hope You agree with me that my decision was correct. Mesa tesselation
-_always_ checks by itself the interrelations between contours. Just as if
-all contours were specified with the type GLU_UNKNOWN.
-
-One of OpenGL's policy is not to check all error conditions - rely sometimes
-that the user "got things right". This is justified, since exhausting
-error checking is timeconsuming, and would significantly slow down
-a correct application. The Mesa tesselation code assumes only _one_ condition
-when triangulating - all vertices in a contour are planar. This is _not_
-checked for correctness. Trying to tesselate such objects will lead to
-unpredictable output.
-
-And now we arrive to the moment where I would like to list the required
-(but checked for) conditions for triangulation, as well as summarize the
-library:
-
-* all contours in a single tesselation cycle _must_ be coplanar - if not
- an error is raised (and if provided a call to the error callback
- is made)
-* the contours can be passed in _any_ order, exteriors and holes can be
- intermixed within a tesselation cycle and the correct hierarchy
- will be determined by the library; thus specifying first holes then
- exteriors, then holes within holes form a valid input.
-* a hole within a hole is consider to be a yet another exterior contour
-* multiple exterior contours (polygons) can be tesselated in one cycle;
- _but_ this significantly degrades performance since many tests will be
- performed for every contour pair; if You want triangulation to be fast
- tesselate a single polygon (with possible holes) one at a time.
-* orientation of exterior contours is arbitray, but if it has holes,
- all interior holes of this particular exterior contour _must_ have an
- opposite orientation.
-* the output triangles have the same orientation as the exterior contour
- that forms them
-* each triangle is "enclosed" within the begin and end callbacks;
- this is not efficent, but was made on purpose; so if triangulation
- results in 2 triangles the following callbacks will be made in such
- order:
- <begin>(GLU_TRAINGLES)
- <vertex>(...) /* 3 vertices of first triangle */
- <vertex>(...)
- <vertex>(...)
- <end>()
- <begin>(GLU_TRAINGLES)
- <vertex>(...) /* 3 vertices of second triangle */
- <vertex>(...)
- <vertex>(...)
- <end>()
- Of course only when begin, vertex, and end callback were provided,
- otherwise no output is done (actually tesselation does not take place).
-* You will notice that some output traingles are very "thin"; there
- exist possible several ways to traingulate a polygon, but "smart" code
- avoiding such cases would require time to write, and will impact on
- execution speed.
-* like OpenGL, no new vertices are introduced during triangulation
-* if the edgeflag callback is provided it will be called whenever
- the just-about-to be output vertex begins a different type of edge
- than the previous vertices; always before the first output a call
- is made with GL_TRUE, to allow synchronization.
-* all intermediate computations are done using GLdouble type, and comparisons
- are biased with a precision value (EPSILON defined in tess.h)
-* the point_in_poly function is my adaptation of code from the
- comp.graphics.alg newsgroup FAQ (originally written by Mr. Wm. Randolph
- Franklin, modified by Scott Anguish).
-* the edge_edge_intersect test is also an adopted code from comp.graphics.alg
- newsgroup FAQ
-* the general idea for traingulation used in this library is described in
- the book "Computational Geometry in C" by Joseph O'Rourke.
-
-
-Excuse my English, its not my mother tongue. I should be available for some
-time uner the following e-mail address. But For how long I am not certain.
-Once I am settled in my new place, I'll post on the Mesa mailing list
-my new address.
-
-(PS: today is my last day of work here, I'm changing my job).
-
-Bogdan. ( bogdan@dia.unisa.it )
-
-Apr 28, 1995.
-
+++ /dev/null
-The current NURBS implementation has no trimming facilities yet.
-
-The code is not well commented.
-
-1) Normal calculus fails for special cases of NURBS (independent
- of the NURBS modules)
- Those cases arise when for u or v, some control points
- for a fixed value of that parameter form the same point.
- Imagine a Bezier patch degenerated into a "triangle".
-
- v ^ 0,1,2 order=3
- | *
- |
- | 3* 4* 5*
- |
- | 6* 7* 8*
- |
- |
- +------------------------> u
-
- The calculus of du derivative at triple point (0,1 and 2) will fail.
- As a result, the normal vector will be 0.
- The eval2.c code has to be changed to handle the above situation.
-
-2) Adjacent NURBS surfaces ("sharing" the same control points along
- the "joining" edge) will be sampled with the same factor.
- This prevents the formation of "cracks".
- When the control polygon of the "shared" edge is not the same,
- cracks might appear.
-
-The sampling tolerance is sometimes not respected!
-A NURBS object is broken into Bezier curves/surfaces. If one of such
-Bezier objects has a local high curvature with other portions of it
-relatively flat then the high curvature part will be sampled more dense that
-its flatter regions.
-The flat regions might be tesselated into quads having sides of length
-greater than the current sampling tolernace setting.
-I believe such behaviour is acceptable, though not along the concept of
-sampling tolerance.
-
-February 20, 1996.
-
-Bogdan.
+++ /dev/null
-
-/*
- * Mesa 3-D graphics library
- * Version: 3.3
- * Copyright (C) 1995-2000 Brian Paul
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-
-/*
- * This file includes all .h files needed for the GLU source code for
- * the purpose of precompiled headers.
- *
- * If the preprocessor symbol PCH is defined at compile time then each
- * of the .c files will #include "all.h" only, instead of a bunch of
- * individual .h files.
- */
-
-
-#ifndef GLU_ALL_H
-#define GLU_ALL_H
-
-
-#ifndef PC_HEADER
-This is an error. all.h should be included only if PCH is defined.
-#endif
-
-
-#include <assert.h>
-#include <math.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include "GL/gl.h"
-#include "GL/glu.h"
-#include "gluP.h"
-#include "nurbs.h"
-#include "tess.h"
-
-
-#endif /*GLU_ALL_H */
+++ /dev/null
-
-/*
- * Mesa 3-D graphics library
- * Version: 3.5
- * Copyright (C) 1995-2001 Brian Paul
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-
-#ifdef PC_HEADER
-#include "all.h"
-#else
-#include <assert.h>
-#include <math.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include "gluP.h"
-#endif
-
-
-/*
- * Miscellaneous utility functions
- */
-
-
-#ifndef M_PI
-#define M_PI 3.1415926536
-#endif
-#define EPS 0.00001
-
-#ifndef GLU_INCOMPATIBLE_GL_VERSION
-#define GLU_INCOMPATIBLE_GL_VERSION 100903
-#endif
-
-
-void GLAPIENTRY
-gluLookAt(GLdouble eyex, GLdouble eyey, GLdouble eyez,
- GLdouble centerx, GLdouble centery, GLdouble centerz,
- GLdouble upx, GLdouble upy, GLdouble upz)
-{
- GLdouble m[16];
- GLdouble x[3], y[3], z[3];
- GLdouble mag;
-
- /* Make rotation matrix */
-
- /* Z vector */
- z[0] = eyex - centerx;
- z[1] = eyey - centery;
- z[2] = eyez - centerz;
- mag = sqrt(z[0] * z[0] + z[1] * z[1] + z[2] * z[2]);
- if (mag) { /* mpichler, 19950515 */
- z[0] /= mag;
- z[1] /= mag;
- z[2] /= mag;
- }
-
- /* Y vector */
- y[0] = upx;
- y[1] = upy;
- y[2] = upz;
-
- /* X vector = Y cross Z */
- x[0] = y[1] * z[2] - y[2] * z[1];
- x[1] = -y[0] * z[2] + y[2] * z[0];
- x[2] = y[0] * z[1] - y[1] * z[0];
-
- /* Recompute Y = Z cross X */
- y[0] = z[1] * x[2] - z[2] * x[1];
- y[1] = -z[0] * x[2] + z[2] * x[0];
- y[2] = z[0] * x[1] - z[1] * x[0];
-
- /* mpichler, 19950515 */
- /* cross product gives area of parallelogram, which is < 1.0 for
- * non-perpendicular unit-length vectors; so normalize x, y here
- */
-
- mag = sqrt(x[0] * x[0] + x[1] * x[1] + x[2] * x[2]);
- if (mag) {
- x[0] /= mag;
- x[1] /= mag;
- x[2] /= mag;
- }
-
- mag = sqrt(y[0] * y[0] + y[1] * y[1] + y[2] * y[2]);
- if (mag) {
- y[0] /= mag;
- y[1] /= mag;
- y[2] /= mag;
- }
-
-#define M(row,col) m[col*4+row]
- M(0, 0) = x[0];
- M(0, 1) = x[1];
- M(0, 2) = x[2];
- M(0, 3) = 0.0;
- M(1, 0) = y[0];
- M(1, 1) = y[1];
- M(1, 2) = y[2];
- M(1, 3) = 0.0;
- M(2, 0) = z[0];
- M(2, 1) = z[1];
- M(2, 2) = z[2];
- M(2, 3) = 0.0;
- M(3, 0) = 0.0;
- M(3, 1) = 0.0;
- M(3, 2) = 0.0;
- M(3, 3) = 1.0;
-#undef M
- glMultMatrixd(m);
-
- /* Translate Eye to Origin */
- glTranslated(-eyex, -eyey, -eyez);
-
-}
-
-
-
-void GLAPIENTRY
-gluOrtho2D(GLdouble left, GLdouble right, GLdouble bottom, GLdouble top)
-{
- glOrtho(left, right, bottom, top, -1.0, 1.0);
-}
-
-
-
-static void
-frustum(GLdouble left, GLdouble right,
- GLdouble bottom, GLdouble top,
- GLdouble nearval, GLdouble farval)
-{
- GLdouble x, y, a, b, c, d;
- GLdouble m[16];
-
- x = (2.0 * nearval) / (right - left);
- y = (2.0 * nearval) / (top - bottom);
- a = (right + left) / (right - left);
- b = (top + bottom) / (top - bottom);
- c = -(farval + nearval) / ( farval - nearval);
- d = -(2.0 * farval * nearval) / (farval - nearval);
-
-#define M(row,col) m[col*4+row]
- M(0,0) = x; M(0,1) = 0.0F; M(0,2) = a; M(0,3) = 0.0F;
- M(1,0) = 0.0F; M(1,1) = y; M(1,2) = b; M(1,3) = 0.0F;
- M(2,0) = 0.0F; M(2,1) = 0.0F; M(2,2) = c; M(2,3) = d;
- M(3,0) = 0.0F; M(3,1) = 0.0F; M(3,2) = -1.0F; M(3,3) = 0.0F;
-#undef M
-
- glMultMatrixd(m);
-}
-
-
-void GLAPIENTRY
-gluPerspective(GLdouble fovy, GLdouble aspect, GLdouble zNear, GLdouble zFar)
-{
- GLdouble xmin, xmax, ymin, ymax;
-
- ymax = zNear * tan(fovy * M_PI / 360.0);
- ymin = -ymax;
- xmin = ymin * aspect;
- xmax = ymax * aspect;
-
- /* don't call glFrustum() because of error semantics (covglu) */
- frustum(xmin, xmax, ymin, ymax, zNear, zFar);
-}
-
-
-
-void GLAPIENTRY
-gluPickMatrix(GLdouble x, GLdouble y,
- GLdouble width, GLdouble height, GLint viewport[4])
-{
- GLfloat m[16];
- GLfloat sx, sy;
- GLfloat tx, ty;
-
- sx = viewport[2] / width;
- sy = viewport[3] / height;
- tx = (viewport[2] + 2.0 * (viewport[0] - x)) / width;
- ty = (viewport[3] + 2.0 * (viewport[1] - y)) / height;
-
-#define M(row,col) m[col*4+row]
- M(0, 0) = sx;
- M(0, 1) = 0.0;
- M(0, 2) = 0.0;
- M(0, 3) = tx;
- M(1, 0) = 0.0;
- M(1, 1) = sy;
- M(1, 2) = 0.0;
- M(1, 3) = ty;
- M(2, 0) = 0.0;
- M(2, 1) = 0.0;
- M(2, 2) = 1.0;
- M(2, 3) = 0.0;
- M(3, 0) = 0.0;
- M(3, 1) = 0.0;
- M(3, 2) = 0.0;
- M(3, 3) = 1.0;
-#undef M
-
- glMultMatrixf(m);
-}
-
-
-
-const GLubyte *GLAPIENTRY
-gluErrorString(GLenum errorCode)
-{
- static char *tess_error[] = {
- "missing gluBeginPolygon",
- "missing gluBeginContour",
- "missing gluEndPolygon",
- "missing gluEndContour",
- "misoriented or self-intersecting loops",
- "coincident vertices",
- "colinear vertices",
- "FIST recovery process fatal error"
- };
- static char *nurbs_error[] = {
- "spline order un-supported",
- "too few knots",
- "valid knot range is empty",
- "decreasing knot sequence knot",
- "knot multiplicity greater than order of spline",
- "endcurve() must follow bgncurve()",
- "bgncurve() must precede endcurve()",
- "missing or extra geometric data",
- "can't draw pwlcurves",
- "missing bgncurve()",
- "missing bgnsurface()",
- "endtrim() must precede endsurface()",
- "bgnsurface() must precede endsurface()",
- "curve of improper type passed as trim curve",
- "bgnsurface() must precede bgntrim()",
- "endtrim() must follow bgntrim()",
- "bgntrim() must precede endtrim()",
- "invalid or missing trim curve",
- "bgntrim() must precede pwlcurve()",
- "pwlcurve referenced twice",
- "pwlcurve and nurbscurve mixed",
- "improper usage of trim data type",
- "nurbscurve referenced twice",
- "nurbscurve and pwlcurve mixed",
- "nurbssurface referenced twice",
- "invalid property",
- "endsurface() must follow bgnsurface()",
- "misoriented trim curves",
- "intersecting trim curves",
- "UNUSED",
- "unconnected trim curves",
- "unknown knot error",
- "negative vertex count encountered",
- "negative byte-stride encountered",
- "unknown type descriptor",
- "null control array or knot vector",
- "duplicate point on pwlcurve"
- };
-
- /* GL Errors */
- if (errorCode == GL_NO_ERROR) {
- return (GLubyte *) "no error";
- }
- else if (errorCode == GL_INVALID_VALUE) {
- return (GLubyte *) "invalid value";
- }
- else if (errorCode == GL_INVALID_ENUM) {
- return (GLubyte *) "invalid enum";
- }
- else if (errorCode == GL_INVALID_OPERATION) {
- return (GLubyte *) "invalid operation";
- }
- else if (errorCode == GL_STACK_OVERFLOW) {
- return (GLubyte *) "stack overflow";
- }
- else if (errorCode == GL_STACK_UNDERFLOW) {
- return (GLubyte *) "stack underflow";
- }
- else if (errorCode == GL_OUT_OF_MEMORY) {
- return (GLubyte *) "out of memory";
- }
- /* GLU Errors */
- else if (errorCode == GLU_NO_ERROR) {
- return (GLubyte *) "no error";
- }
- else if (errorCode == GLU_INVALID_ENUM) {
- return (GLubyte *) "invalid enum";
- }
- else if (errorCode == GLU_INVALID_VALUE) {
- return (GLubyte *) "invalid value";
- }
- else if (errorCode == GLU_OUT_OF_MEMORY) {
- return (GLubyte *) "out of memory";
- }
- else if (errorCode == GLU_INCOMPATIBLE_GL_VERSION) {
- return (GLubyte *) "incompatible GL version";
- }
- else if (errorCode >= GLU_TESS_ERROR1 && errorCode <= GLU_TESS_ERROR8) {
- return (GLubyte *) tess_error[errorCode - GLU_TESS_ERROR1];
- }
- else if (errorCode >= GLU_NURBS_ERROR1 && errorCode <= GLU_NURBS_ERROR37) {
- return (GLubyte *) nurbs_error[errorCode - GLU_NURBS_ERROR1];
- }
- else {
- return NULL;
- }
-}
-
-
-
-/*
- * New in GLU 1.1
- */
-
-const GLubyte *GLAPIENTRY
-gluGetString(GLenum name)
-{
- static char *extensions = "GL_EXT_abgr";
- static char *version = "1.1 Mesa 3.5";
-
- switch (name) {
- case GLU_EXTENSIONS:
- return (GLubyte *) extensions;
- case GLU_VERSION:
- return (GLubyte *) version;
- default:
- return NULL;
- }
-}
-
-
-
-#if 0 /* gluGetProcAddressEXT not finalized yet! */
-
-#ifdef __cplusplus
- /* for BeOS R4.5 */
-void GLAPIENTRY(*gluGetProcAddressEXT(const GLubyte * procName)) (...)
-#else
-void (GLAPIENTRY * gluGetProcAddressEXT(const GLubyte * procName)) ()
-#endif
-{
- struct proc
- {
- const char *name;
- void *address;
- };
- static struct proc procTable[] = {
- {"gluGetProcAddressEXT", (void *) gluGetProcAddressEXT}, /* me! */
-
- /* new 1.1 functions */
- {"gluGetString", (void *) gluGetString},
-
- /* new 1.2 functions */
- {"gluTessBeginPolygon", (void *) gluTessBeginPolygon},
- {"gluTessBeginContour", (void *) gluTessBeginContour},
- {"gluTessEndContour", (void *) gluTessEndContour},
- {"gluTessEndPolygon", (void *) gluTessEndPolygon},
- {"gluGetTessProperty", (void *) gluGetTessProperty},
-
- /* new 1.3 functions */
-
- {NULL, NULL}
- };
- GLuint i;
-
- for (i = 0; procTable[i].address; i++) {
- if (strcmp((const char *) procName, procTable[i].name) == 0)
- return (void (GLAPIENTRY *) ()) procTable[i].address;
- }
-
- return NULL;
-}
-
-#endif
-
-
-
-/*
- * New in GLU 1.3
- */
-#ifdef GLU_VERSION_1_3
-GLboolean GLAPIENTRY
-gluCheckExtension(const GLubyte *extName, const GLubyte * extString)
-{
- assert(extName);
- assert(extString);
- {
- const int len = strlen((const char *) extName);
- const char *start = (const char *) extString;
-
- while (1) {
- const char *c = strstr(start, (const char *) extName);
- if (!c)
- return GL_FALSE;
-
- if ((c == start || c[-1] == ' ') && (c[len] == ' ' || c[len] == 0))
- return GL_TRUE;
-
- start = c + len;
- }
- }
-}
-#endif
+++ /dev/null
-/*
- * Mesa 3-D graphics library
- * Version: 6.3
- * Copyright (C) 1995-2004 Brian Paul
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-
-/*
- * This file allows the GLU code to be compiled either with the Mesa
- * headers or with the real OpenGL headers.
- */
-
-
-#ifndef GLUP_H
-#define GLUP_H
-
-
-#include <GL/gl.h>
-#include <GL/glu.h>
-#include <string.h>
-
-
-#if defined(_WIN32) && !defined(__WIN32__)
-# define __WIN32__
-#endif
-
-#if !defined(OPENSTEP) && (defined(__WIN32__) || defined(__CYGWIN__))
-# pragma warning( disable : 4068 ) /* unknown pragma */
-# pragma warning( disable : 4710 ) /* function 'foo' not inlined */
-# pragma warning( disable : 4711 ) /* function 'foo' selected for automatic inline expansion */
-# pragma warning( disable : 4127 ) /* conditional expression is constant */
-# if defined(MESA_MINWARN)
-# pragma warning( disable : 4244 ) /* '=' : conversion from 'const double ' to 'float ', possible loss of data */
-# pragma warning( disable : 4018 ) /* '<' : signed/unsigned mismatch */
-# pragma warning( disable : 4305 ) /* '=' : truncation from 'const double ' to 'float ' */
-# pragma warning( disable : 4550 ) /* 'function' undefined; assuming extern returning int */
-# pragma warning( disable : 4761 ) /* integral size mismatch in argument; conversion supplied */
-# endif
-# define GLCALLBACK __stdcall
-# if defined(__CYGWIN__)
-# define GLCALLBACKPCAST *
-# else
-# define GLCALLBACKPCAST __stdcall *
-# endif
-#else
-/* non-Windows compilation */
-# define GLCALLBACK
-# define GLCALLBACKPCAST *
-#endif /* WIN32 / CYGWIN bracket */
-
-/* compatability guard so we don't need to change client code */
-
-#if defined(_WIN32) && !defined(_WINDEF_) && !defined(_GNU_H_WINDOWS32_BASE) && !defined(OPENSTEP)
-# define CALLBACK GLCALLBACK
-#endif
-
-
-
-#ifndef GLU_TESS_ERROR9
- /* If we're using the real OpenGL header files... */
-# define GLU_TESS_ERROR9 100159
-#endif
-
-
-#define GLU_NO_ERROR GL_NO_ERROR
-
-
-/* for Sun: */
-#ifdef SUNOS4
-#define MEMCPY( DST, SRC, BYTES) \
- memcpy( (char *) (DST), (char *) (SRC), (int) (BYTES) )
-#else
-#define MEMCPY( DST, SRC, BYTES) \
- memcpy( (void *) (DST), (void *) (SRC), (size_t) (BYTES) )
-#endif
-
-
-#ifndef NULL
-# define NULL 0
-#endif
-
-
-#endif
+++ /dev/null
-
-/*
- * Mesa 3-D graphics library
- * Version: 3.4
- * Copyright (C) 1995-2000 Brian Paul
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-
-#ifdef PC_HEADER
-#include "all.h"
-#else
-#include <assert.h>
-#include <math.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include "gluP.h"
-#endif
-
-
-/*
- * Compute ceiling of integer quotient of A divided by B:
- */
-#define CEILING( A, B ) ( (A) % (B) == 0 ? (A)/(B) : (A)/(B)+1 )
-
-
-
-#ifdef EPSILON
-#undef EPSILON
-#endif
-#define EPSILON 0.001
-
-
-/* To work around optimizer bug in MSVC4.1 */
-#if defined(__WIN32__) && !defined(OPENSTEP)
-void
-dummy(GLuint j, GLuint k)
-{
-}
-#else
-#define dummy(J, K)
-#endif
-
-
-GLint GLAPIENTRY
-gluScaleImage(GLenum format,
- GLsizei widthin, GLsizei heightin,
- GLenum typein, const void *datain,
- GLsizei widthout, GLsizei heightout,
- GLenum typeout, void *dataout)
-{
- GLint components, i, j, k;
- GLfloat *tempin, *tempout;
- GLfloat sx, sy;
- GLint unpackrowlength, unpackalignment, unpackskiprows, unpackskippixels;
- GLint packrowlength, packalignment, packskiprows, packskippixels;
- GLint sizein, sizeout;
- GLint rowstride, rowlen;
-
-
- /* Determine number of components per pixel */
- switch (format) {
- case GL_COLOR_INDEX:
- case GL_STENCIL_INDEX:
- case GL_DEPTH_COMPONENT:
- case GL_RED:
- case GL_GREEN:
- case GL_BLUE:
- case GL_ALPHA:
- case GL_LUMINANCE:
- components = 1;
- break;
- case GL_LUMINANCE_ALPHA:
- components = 2;
- break;
- case GL_RGB:
- case GL_BGR:
- components = 3;
- break;
- case GL_RGBA:
- case GL_BGRA:
-#ifdef GL_EXT_abgr
- case GL_ABGR_EXT:
-#endif
- components = 4;
- break;
- default:
- return GLU_INVALID_ENUM;
- }
-
- /* Determine bytes per input datum */
- switch (typein) {
- case GL_UNSIGNED_BYTE:
- sizein = sizeof(GLubyte);
- break;
- case GL_BYTE:
- sizein = sizeof(GLbyte);
- break;
- case GL_UNSIGNED_SHORT:
- sizein = sizeof(GLushort);
- break;
- case GL_SHORT:
- sizein = sizeof(GLshort);
- break;
- case GL_UNSIGNED_INT:
- sizein = sizeof(GLuint);
- break;
- case GL_INT:
- sizein = sizeof(GLint);
- break;
- case GL_FLOAT:
- sizein = sizeof(GLfloat);
- break;
- case GL_BITMAP:
- /* not implemented yet */
- default:
- return GL_INVALID_ENUM;
- }
-
- /* Determine bytes per output datum */
- switch (typeout) {
- case GL_UNSIGNED_BYTE:
- sizeout = sizeof(GLubyte);
- break;
- case GL_BYTE:
- sizeout = sizeof(GLbyte);
- break;
- case GL_UNSIGNED_SHORT:
- sizeout = sizeof(GLushort);
- break;
- case GL_SHORT:
- sizeout = sizeof(GLshort);
- break;
- case GL_UNSIGNED_INT:
- sizeout = sizeof(GLuint);
- break;
- case GL_INT:
- sizeout = sizeof(GLint);
- break;
- case GL_FLOAT:
- sizeout = sizeof(GLfloat);
- break;
- case GL_BITMAP:
- /* not implemented yet */
- default:
- return GL_INVALID_ENUM;
- }
-
- /* Get glPixelStore state */
- glGetIntegerv(GL_UNPACK_ROW_LENGTH, &unpackrowlength);
- glGetIntegerv(GL_UNPACK_ALIGNMENT, &unpackalignment);
- glGetIntegerv(GL_UNPACK_SKIP_ROWS, &unpackskiprows);
- glGetIntegerv(GL_UNPACK_SKIP_PIXELS, &unpackskippixels);
- glGetIntegerv(GL_PACK_ROW_LENGTH, &packrowlength);
- glGetIntegerv(GL_PACK_ALIGNMENT, &packalignment);
- glGetIntegerv(GL_PACK_SKIP_ROWS, &packskiprows);
- glGetIntegerv(GL_PACK_SKIP_PIXELS, &packskippixels);
-
- /* Allocate storage for intermediate images */
- tempin = (GLfloat *) malloc(widthin * heightin
- * components * sizeof(GLfloat));
- if (!tempin) {
- return GLU_OUT_OF_MEMORY;
- }
- tempout = (GLfloat *) malloc(widthout * heightout
- * components * sizeof(GLfloat));
- if (!tempout) {
- free(tempin);
- return GLU_OUT_OF_MEMORY;
- }
-
-
- /*
- * Unpack the pixel data and convert to floating point
- */
-
- if (unpackrowlength > 0) {
- rowlen = unpackrowlength;
- }
- else {
- rowlen = widthin;
- }
- if (sizein >= unpackalignment) {
- rowstride = components * rowlen;
- }
- else {
- rowstride = unpackalignment / sizein
- * CEILING(components * rowlen * sizein, unpackalignment);
- }
-
- switch (typein) {
- case GL_UNSIGNED_BYTE:
- k = 0;
- for (i = 0; i < heightin; i++) {
- GLubyte *ubptr = (GLubyte *) datain
- + i * rowstride
- + unpackskiprows * rowstride + unpackskippixels * components;
- for (j = 0; j < widthin * components; j++) {
- dummy(j, k);
- tempin[k++] = (GLfloat) * ubptr++;
- }
- }
- break;
- case GL_BYTE:
- k = 0;
- for (i = 0; i < heightin; i++) {
- GLbyte *bptr = (GLbyte *) datain
- + i * rowstride
- + unpackskiprows * rowstride + unpackskippixels * components;
- for (j = 0; j < widthin * components; j++) {
- dummy(j, k);
- tempin[k++] = (GLfloat) * bptr++;
- }
- }
- break;
- case GL_UNSIGNED_SHORT:
- k = 0;
- for (i = 0; i < heightin; i++) {
- GLushort *usptr = (GLushort *) datain
- + i * rowstride
- + unpackskiprows * rowstride + unpackskippixels * components;
- for (j = 0; j < widthin * components; j++) {
- dummy(j, k);
- tempin[k++] = (GLfloat) * usptr++;
- }
- }
- break;
- case GL_SHORT:
- k = 0;
- for (i = 0; i < heightin; i++) {
- GLshort *sptr = (GLshort *) datain
- + i * rowstride
- + unpackskiprows * rowstride + unpackskippixels * components;
- for (j = 0; j < widthin * components; j++) {
- dummy(j, k);
- tempin[k++] = (GLfloat) * sptr++;
- }
- }
- break;
- case GL_UNSIGNED_INT:
- k = 0;
- for (i = 0; i < heightin; i++) {
- GLuint *uiptr = (GLuint *) datain
- + i * rowstride
- + unpackskiprows * rowstride + unpackskippixels * components;
- for (j = 0; j < widthin * components; j++) {
- dummy(j, k);
- tempin[k++] = (GLfloat) * uiptr++;
- }
- }
- break;
- case GL_INT:
- k = 0;
- for (i = 0; i < heightin; i++) {
- GLint *iptr = (GLint *) datain
- + i * rowstride
- + unpackskiprows * rowstride + unpackskippixels * components;
- for (j = 0; j < widthin * components; j++) {
- dummy(j, k);
- tempin[k++] = (GLfloat) * iptr++;
- }
- }
- break;
- case GL_FLOAT:
- k = 0;
- for (i = 0; i < heightin; i++) {
- GLfloat *fptr = (GLfloat *) datain
- + i * rowstride
- + unpackskiprows * rowstride + unpackskippixels * components;
- for (j = 0; j < widthin * components; j++) {
- dummy(j, k);
- tempin[k++] = *fptr++;
- }
- }
- break;
- default:
- {
- free(tempin);
- free(tempout);
- return GLU_INVALID_ENUM;
- }
- }
-
-
- /*
- * Scale the image!
- */
-
- if (widthout > 1)
- sx = (GLfloat) (widthin - 1) / (GLfloat) (widthout - 1);
- else
- sx = (GLfloat) (widthin - 1);
- if (heightout > 1)
- sy = (GLfloat) (heightin - 1) / (GLfloat) (heightout - 1);
- else
- sy = (GLfloat) (heightin - 1);
-
-/*#define POINT_SAMPLE*/
-#ifdef POINT_SAMPLE
- for (i = 0; i < heightout; i++) {
- GLint ii = i * sy;
- for (j = 0; j < widthout; j++) {
- GLint jj = j * sx;
-
- GLfloat *src = tempin + (ii * widthin + jj) * components;
- GLfloat *dst = tempout + (i * widthout + j) * components;
-
- for (k = 0; k < components; k++) {
- *dst++ = *src++;
- }
- }
- }
-#else
- if (sx < 1.0 && sy < 1.0) {
- /* magnify both width and height: use weighted sample of 4 pixels */
- GLint i0, i1, j0, j1;
- GLfloat alpha, beta;
- GLfloat *src00, *src01, *src10, *src11;
- GLfloat s1, s2;
- GLfloat *dst;
-
- for (i = 0; i < heightout; i++) {
- i0 = i * sy;
- i1 = i0 + 1;
- if (i1 >= heightin)
- i1 = heightin - 1;
-/* i1 = (i+1) * sy - EPSILON;*/
- alpha = i * sy - i0;
- for (j = 0; j < widthout; j++) {
- j0 = j * sx;
- j1 = j0 + 1;
- if (j1 >= widthin)
- j1 = widthin - 1;
-/* j1 = (j+1) * sx - EPSILON; */
- beta = j * sx - j0;
-
- /* compute weighted average of pixels in rect (i0,j0)-(i1,j1) */
- src00 = tempin + (i0 * widthin + j0) * components;
- src01 = tempin + (i0 * widthin + j1) * components;
- src10 = tempin + (i1 * widthin + j0) * components;
- src11 = tempin + (i1 * widthin + j1) * components;
-
- dst = tempout + (i * widthout + j) * components;
-
- for (k = 0; k < components; k++) {
- s1 = *src00++ * (1.0 - beta) + *src01++ * beta;
- s2 = *src10++ * (1.0 - beta) + *src11++ * beta;
- *dst++ = s1 * (1.0 - alpha) + s2 * alpha;
- }
- }
- }
- }
- else {
- /* shrink width and/or height: use an unweighted box filter */
- GLint i0, i1;
- GLint j0, j1;
- GLint ii, jj;
- GLfloat sum, *dst;
-
- for (i = 0; i < heightout; i++) {
- i0 = i * sy;
- i1 = i0 + 1;
- if (i1 >= heightin)
- i1 = heightin - 1;
-/* i1 = (i+1) * sy - EPSILON; */
- for (j = 0; j < widthout; j++) {
- j0 = j * sx;
- j1 = j0 + 1;
- if (j1 >= widthin)
- j1 = widthin - 1;
-/* j1 = (j+1) * sx - EPSILON; */
-
- dst = tempout + (i * widthout + j) * components;
-
- /* compute average of pixels in the rectangle (i0,j0)-(i1,j1) */
- for (k = 0; k < components; k++) {
- sum = 0.0;
- for (ii = i0; ii <= i1; ii++) {
- for (jj = j0; jj <= j1; jj++) {
- sum += *(tempin + (ii * widthin + jj) * components + k);
- }
- }
- sum /= (j1 - j0 + 1) * (i1 - i0 + 1);
- *dst++ = sum;
- }
- }
- }
- }
-#endif
-
-
- /*
- * Return output image
- */
-
- if (packrowlength > 0) {
- rowlen = packrowlength;
- }
- else {
- rowlen = widthout;
- }
- if (sizeout >= packalignment) {
- rowstride = components * rowlen;
- }
- else {
- rowstride = packalignment / sizeout
- * CEILING(components * rowlen * sizeout, packalignment);
- }
-
- switch (typeout) {
- case GL_UNSIGNED_BYTE:
- k = 0;
- for (i = 0; i < heightout; i++) {
- GLubyte *ubptr = (GLubyte *) dataout
- + i * rowstride
- + packskiprows * rowstride + packskippixels * components;
- for (j = 0; j < widthout * components; j++) {
- dummy(j, k + i);
- *ubptr++ = (GLubyte) tempout[k++];
- }
- }
- break;
- case GL_BYTE:
- k = 0;
- for (i = 0; i < heightout; i++) {
- GLbyte *bptr = (GLbyte *) dataout
- + i * rowstride
- + packskiprows * rowstride + packskippixels * components;
- for (j = 0; j < widthout * components; j++) {
- dummy(j, k + i);
- *bptr++ = (GLbyte) tempout[k++];
- }
- }
- break;
- case GL_UNSIGNED_SHORT:
- k = 0;
- for (i = 0; i < heightout; i++) {
- GLushort *usptr = (GLushort *) dataout
- + i * rowstride
- + packskiprows * rowstride + packskippixels * components;
- for (j = 0; j < widthout * components; j++) {
- dummy(j, k + i);
- *usptr++ = (GLushort) tempout[k++];
- }
- }
- break;
- case GL_SHORT:
- k = 0;
- for (i = 0; i < heightout; i++) {
- GLshort *sptr = (GLshort *) dataout
- + i * rowstride
- + packskiprows * rowstride + packskippixels * components;
- for (j = 0; j < widthout * components; j++) {
- dummy(j, k + i);
- *sptr++ = (GLshort) tempout[k++];
- }
- }
- break;
- case GL_UNSIGNED_INT:
- k = 0;
- for (i = 0; i < heightout; i++) {
- GLuint *uiptr = (GLuint *) dataout
- + i * rowstride
- + packskiprows * rowstride + packskippixels * components;
- for (j = 0; j < widthout * components; j++) {
- dummy(j, k + i);
- *uiptr++ = (GLuint) tempout[k++];
- }
- }
- break;
- case GL_INT:
- k = 0;
- for (i = 0; i < heightout; i++) {
- GLint *iptr = (GLint *) dataout
- + i * rowstride
- + packskiprows * rowstride + packskippixels * components;
- for (j = 0; j < widthout * components; j++) {
- dummy(j, k + i);
- *iptr++ = (GLint) tempout[k++];
- }
- }
- break;
- case GL_FLOAT:
- k = 0;
- for (i = 0; i < heightout; i++) {
- GLfloat *fptr = (GLfloat *) dataout
- + i * rowstride
- + packskiprows * rowstride + packskippixels * components;
- for (j = 0; j < widthout * components; j++) {
- dummy(j, k + i);
- *fptr++ = tempout[k++];
- }
- }
- break;
- default:
- return GLU_INVALID_ENUM;
- }
-
-
- /* free temporary image storage */
- free(tempin);
- free(tempout);
-
- return 0;
-}
-
-
-
-/*
- * Return the largest k such that 2^k <= n.
- */
-static GLint
-ilog2(GLint n)
-{
- GLint k;
-
- if (n <= 0)
- return 0;
- for (k = 0; n >>= 1; k++);
- return k;
-}
-
-
-
-/*
- * Find the value nearest to n which is also a power of two.
- */
-static GLint
-round2(GLint n)
-{
- GLint m;
-
- for (m = 1; m < n; m *= 2);
-
- /* m>=n */
- if (m - n <= n - m / 2) {
- return m;
- }
- else {
- return m / 2;
- }
-}
-
-
-/*
- * Given an pixel format and datatype, return the number of bytes to
- * store one pixel.
- */
-static GLint
-bytes_per_pixel(GLenum format, GLenum type)
-{
- GLint n, m;
-
- switch (format) {
- case GL_COLOR_INDEX:
- case GL_STENCIL_INDEX:
- case GL_DEPTH_COMPONENT:
- case GL_RED:
- case GL_GREEN:
- case GL_BLUE:
- case GL_ALPHA:
- case GL_LUMINANCE:
- n = 1;
- break;
- case GL_LUMINANCE_ALPHA:
- n = 2;
- break;
- case GL_RGB:
- case GL_BGR:
- n = 3;
- break;
- case GL_RGBA:
- case GL_BGRA:
-#ifdef GL_EXT_abgr
- case GL_ABGR_EXT:
-#endif
- n = 4;
- break;
- default:
- n = 0;
- }
-
- switch (type) {
- case GL_UNSIGNED_BYTE:
- m = sizeof(GLubyte);
- break;
- case GL_BYTE:
- m = sizeof(GLbyte);
- break;
- case GL_BITMAP:
- m = 1;
- break;
- case GL_UNSIGNED_SHORT:
- m = sizeof(GLushort);
- break;
- case GL_SHORT:
- m = sizeof(GLshort);
- break;
- case GL_UNSIGNED_INT:
- m = sizeof(GLuint);
- break;
- case GL_INT:
- m = sizeof(GLint);
- break;
- case GL_FLOAT:
- m = sizeof(GLfloat);
- break;
- default:
- m = 0;
- }
-
- return n * m;
-}
-
-
-
-/*
- * WARNING: This function isn't finished and has never been tested!!!!
- */
-GLint GLAPIENTRY
-gluBuild1DMipmaps(GLenum target, GLint components,
- GLsizei width, GLenum format, GLenum type, const void *data)
-{
- GLubyte *texture;
- GLint levels, max_levels;
- GLint new_width, max_width;
- GLint i, j, k, l;
-
- if (width < 1)
- return GLU_INVALID_VALUE;
-
- glGetIntegerv(GL_MAX_TEXTURE_SIZE, &max_width);
- max_levels = ilog2(max_width) + 1;
-
- /* Compute how many mipmap images to make */
- levels = ilog2(width) + 1;
- if (levels > max_levels) {
- levels = max_levels;
- }
-
- new_width = 1 << (levels - 1);
-
- texture = (GLubyte *) malloc(new_width * components);
- if (!texture) {
- return GLU_OUT_OF_MEMORY;
- }
-
- if (width != new_width) {
- /* initial rescaling */
- switch (type) {
- case GL_UNSIGNED_BYTE:
- {
- GLubyte *ub_data = (GLubyte *) data;
- for (i = 0; i < new_width; i++) {
- j = i * width / new_width;
- for (k = 0; k < components; k++) {
- texture[i * components + k] = ub_data[j * components + k];
- }
- }
- }
- break;
- default:
- /* Not implemented */
- free(texture);
- return GLU_ERROR;
- }
- }
-
- /* generate and load mipmap images */
- for (l = 0; l < levels; l++) {
- glTexImage1D(GL_TEXTURE_1D, l, components, new_width, 0,
- format, GL_UNSIGNED_BYTE, texture);
-
- /* Scale image down to 1/2 size */
- new_width = new_width / 2;
- for (i = 0; i < new_width; i++) {
- for (k = 0; k < components; k++) {
- GLint sample1, sample2;
- sample1 = (GLint) texture[i * 2 * components + k];
- sample2 = (GLint) texture[(i * 2 + 1) * components + k];
- texture[i * components + k] = (GLubyte) ((sample1 + sample2) / 2);
- }
- }
- }
-
- free(texture);
-
- return 0;
-}
-
-
-
-GLint GLAPIENTRY
-gluBuild2DMipmaps(GLenum target, GLint components,
- GLsizei width, GLsizei height, GLenum format,
- GLenum type, const void *data)
-{
- GLint w, h, maxsize;
- void *image, *newimage;
- GLint neww, newh, level, bpp;
- int error;
- GLboolean done;
- GLint retval = 0;
- GLint unpackrowlength, unpackalignment, unpackskiprows, unpackskippixels;
- GLint packrowlength, packalignment, packskiprows, packskippixels;
-
- if (width < 1 || height < 1)
- return GLU_INVALID_VALUE;
-
- glGetIntegerv(GL_MAX_TEXTURE_SIZE, &maxsize);
-
- w = round2(width);
- if (w > maxsize) {
- w = maxsize;
- }
- h = round2(height);
- if (h > maxsize) {
- h = maxsize;
- }
-
- bpp = bytes_per_pixel(format, type);
- if (bpp == 0) {
- /* probably a bad format or type enum */
- return GLU_INVALID_ENUM;
- }
-
- /* Get current glPixelStore values */
- glGetIntegerv(GL_UNPACK_ROW_LENGTH, &unpackrowlength);
- glGetIntegerv(GL_UNPACK_ALIGNMENT, &unpackalignment);
- glGetIntegerv(GL_UNPACK_SKIP_ROWS, &unpackskiprows);
- glGetIntegerv(GL_UNPACK_SKIP_PIXELS, &unpackskippixels);
- glGetIntegerv(GL_PACK_ROW_LENGTH, &packrowlength);
- glGetIntegerv(GL_PACK_ALIGNMENT, &packalignment);
- glGetIntegerv(GL_PACK_SKIP_ROWS, &packskiprows);
- glGetIntegerv(GL_PACK_SKIP_PIXELS, &packskippixels);
-
- /* set pixel packing */
- glPixelStorei(GL_PACK_ROW_LENGTH, 0);
- glPixelStorei(GL_PACK_ALIGNMENT, 1);
- glPixelStorei(GL_PACK_SKIP_ROWS, 0);
- glPixelStorei(GL_PACK_SKIP_PIXELS, 0);
-
- done = GL_FALSE;
-
- if (w != width || h != height) {
- /* must rescale image to get "top" mipmap texture image */
- image = malloc((w + 4) * h * bpp);
- if (!image) {
- return GLU_OUT_OF_MEMORY;
- }
- error = gluScaleImage(format, width, height, type, data,
- w, h, type, image);
- if (error) {
- retval = error;
- done = GL_TRUE;
- }
- }
- else {
- image = (void *) data;
- }
-
- level = 0;
- while (!done) {
- if (image != data) {
- /* set pixel unpacking */
- glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
- glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
- glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
- glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
- }
-
- glTexImage2D(target, level, components, w, h, 0, format, type, image);
-
- if (w == 1 && h == 1)
- break;
-
- neww = (w < 2) ? 1 : w / 2;
- newh = (h < 2) ? 1 : h / 2;
- newimage = malloc((neww + 4) * newh * bpp);
- if (!newimage) {
- return GLU_OUT_OF_MEMORY;
- }
-
- error = gluScaleImage(format, w, h, type, image,
- neww, newh, type, newimage);
- if (error) {
- retval = error;
- done = GL_TRUE;
- }
-
- if (image != data) {
- free(image);
- }
- image = newimage;
-
- w = neww;
- h = newh;
- level++;
- }
-
- if (image != data) {
- free(image);
- }
-
- /* Restore original glPixelStore state */
- glPixelStorei(GL_UNPACK_ROW_LENGTH, unpackrowlength);
- glPixelStorei(GL_UNPACK_ALIGNMENT, unpackalignment);
- glPixelStorei(GL_UNPACK_SKIP_ROWS, unpackskiprows);
- glPixelStorei(GL_UNPACK_SKIP_PIXELS, unpackskippixels);
- glPixelStorei(GL_PACK_ROW_LENGTH, packrowlength);
- glPixelStorei(GL_PACK_ALIGNMENT, packalignment);
- glPixelStorei(GL_PACK_SKIP_ROWS, packskiprows);
- glPixelStorei(GL_PACK_SKIP_PIXELS, packskippixels);
-
- return retval;
-}
+++ /dev/null
-
-/*
- * Mesa 3-D graphics library
- * Version: 3.3
- * Copyright (C) 1995-2000 Brian Paul
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-
-/*
- * NURBS implementation written by Bogdan Sikorski (bogdan@cira.it)
- * See README2 for more info.
- */
-
-
-#ifdef PC_HEADER
-#include "all.h"
-#else
-#include <stdio.h>
-#include <stdlib.h>
-#include "gluP.h"
-#include "nurbs.h"
-#endif
-
-
-void
-call_user_error(GLUnurbsObj * nobj, GLenum error)
-{
- nobj->error = error;
- if (nobj->error_callback != NULL) {
- (*(nobj->error_callback)) (error);
- }
- else {
- printf("NURBS error %d %s\n", error, (char *) gluErrorString(error));
- }
-}
-
-
-
-GLUnurbsObj *GLAPIENTRY
-gluNewNurbsRenderer(void)
-{
- GLUnurbsObj *n;
- GLfloat tmp_viewport[4];
- GLint i, j;
-
- n = (GLUnurbsObj *) malloc(sizeof(GLUnurbsObj));
- if (n) {
- /* init */
- n->culling = GL_FALSE;
- n->nurbs_type = GLU_NURBS_NONE;
- n->error = GLU_NO_ERROR;
- n->error_callback = NULL;
- n->auto_load_matrix = GL_TRUE;
- n->sampling_tolerance = 50.0;
- n->parametric_tolerance = 0.5;
- n->u_step = n->v_step = 100;
- n->sampling_method = GLU_PATH_LENGTH;
- n->display_mode = GLU_FILL;
- /* in case the user doesn't supply the sampling matrices */
- /* set projection and modelview to identity */
- for (i = 0; i < 4; i++)
- for (j = 0; j < 4; j++)
- if (i == j) {
- n->sampling_matrices.model[i * 4 + j] = 1.0;
- n->sampling_matrices.proj[i * 4 + j] = 1.0;
- }
- else {
- n->sampling_matrices.model[i * 4 + j] = 0.0;
- n->sampling_matrices.proj[i * 4 + j] = 0.0;
- }
- /* and set the viewport sampling matrix to current ciewport */
- glGetFloatv(GL_VIEWPORT, tmp_viewport);
- for (i = 0; i < 4; i++)
- n->sampling_matrices.viewport[i] = tmp_viewport[i];
- n->trim = NULL;
- }
- return n;
-}
-
-
-
-void GLAPIENTRY
-gluDeleteNurbsRenderer(GLUnurbsObj * nobj)
-{
- if (nobj) {
- free(nobj);
- }
-}
-
-
-
-void GLAPIENTRY
-gluLoadSamplingMatrices(GLUnurbsObj * nobj,
- const GLfloat modelMatrix[16],
- const GLfloat projMatrix[16], const GLint viewport[4])
-{
- GLint i;
-
- for (i = 0; i < 16; i++) {
- nobj->sampling_matrices.model[i] = modelMatrix[i];
- nobj->sampling_matrices.proj[i] = projMatrix[i];
- }
- for (i = 0; i < 4; i++)
- nobj->sampling_matrices.viewport[i] = viewport[i];
-}
-
-
-void GLAPIENTRY
-gluNurbsProperty(GLUnurbsObj * nobj, GLenum property, GLfloat value)
-{
- GLenum val;
-
- switch (property) {
- case GLU_SAMPLING_TOLERANCE:
- if (value <= 0.0) {
- call_user_error(nobj, GLU_INVALID_VALUE);
- return;
- }
- nobj->sampling_tolerance = value;
- break;
- case GLU_PARAMETRIC_TOLERANCE:
- if (value <= 0.0) {
- call_user_error(nobj, GLU_INVALID_VALUE);
- return;
- }
- nobj->parametric_tolerance = value;
- break;
- case GLU_U_STEP:
- if (value <= 0.0) {
- call_user_error(nobj, GLU_INVALID_VALUE);
- return;
- }
- nobj->u_step = (GLint) value;
- break;
- case GLU_V_STEP:
- if (value <= 0.0) {
- call_user_error(nobj, GLU_INVALID_VALUE);
- return;
- }
- nobj->v_step = (GLint) value;
- break;
- case GLU_SAMPLING_METHOD:
- val = (GLenum) value;
- if (val != GLU_PATH_LENGTH && val != GLU_PARAMETRIC_ERROR
- && val != GLU_DOMAIN_DISTANCE) {
- call_user_error(nobj, GLU_INVALID_ENUM);
- return;
- }
- nobj->sampling_method = val;
- break;
- case GLU_DISPLAY_MODE:
- val = (GLenum) value;
- if (val != GLU_FILL && val != GLU_OUTLINE_POLYGON
- && val != GLU_OUTLINE_PATCH) {
- call_user_error(nobj, GLU_INVALID_ENUM);
- return;
- }
- if (nobj->nurbs_type == GLU_NURBS_CURVE) {
- call_user_error(nobj, GLU_NURBS_ERROR26);
- return;
- }
- nobj->display_mode = val;
- if (val == GLU_OUTLINE_PATCH)
- fprintf(stderr,
- "NURBS, for the moment, can display only in POLYGON mode\n");
- break;
- case GLU_CULLING:
- val = (GLenum) value;
- if (val != GL_TRUE && val != GL_FALSE) {
- call_user_error(nobj, GLU_INVALID_ENUM);
- return;
- }
- nobj->culling = (GLboolean) value;
- break;
- case GLU_AUTO_LOAD_MATRIX:
- val = (GLenum) value;
- if (val != GL_TRUE && val != GL_FALSE) {
- call_user_error(nobj, GLU_INVALID_ENUM);
- return;
- }
- nobj->auto_load_matrix = (GLboolean) value;
- break;
- default:
- call_user_error(nobj, GLU_NURBS_ERROR26);
- }
-}
-
-
-void GLAPIENTRY
-gluGetNurbsProperty(GLUnurbsObj * nobj, GLenum property, GLfloat * value)
-{
- switch (property) {
- case GLU_SAMPLING_TOLERANCE:
- *value = nobj->sampling_tolerance;
- break;
- case GLU_DISPLAY_MODE:
- *value = (GLfloat) (GLint) nobj->display_mode;
- break;
- case GLU_CULLING:
- *value = nobj->culling ? 1.0 : 0.0;
- break;
- case GLU_AUTO_LOAD_MATRIX:
- *value = nobj->auto_load_matrix ? 1.0 : 0.0;
- break;
- default:
- call_user_error(nobj, GLU_INVALID_ENUM);
- }
-}
-
-
-
-void GLAPIENTRY
-gluBeginCurve(GLUnurbsObj * nobj)
-{
- if (nobj->nurbs_type == GLU_NURBS_CURVE) {
- call_user_error(nobj, GLU_NURBS_ERROR6);
- return;
- }
- nobj->nurbs_type = GLU_NURBS_CURVE;
- nobj->curve.geom.type = GLU_INVALID_ENUM;
- nobj->curve.color.type = GLU_INVALID_ENUM;
- nobj->curve.texture.type = GLU_INVALID_ENUM;
- nobj->curve.normal.type = GLU_INVALID_ENUM;
-}
-
-
-void GLAPIENTRY
-gluEndCurve(GLUnurbsObj * nobj)
-{
- if (nobj->nurbs_type == GLU_NURBS_NONE) {
- call_user_error(nobj, GLU_NURBS_ERROR7);
- return;
- }
- if (nobj->curve.geom.type == GLU_INVALID_ENUM) {
- call_user_error(nobj, GLU_NURBS_ERROR8);
- nobj->nurbs_type = GLU_NURBS_NONE;
- return;
- }
- glPushAttrib((GLbitfield) (GL_EVAL_BIT | GL_ENABLE_BIT));
- glDisable(GL_MAP1_VERTEX_3);
- glDisable(GL_MAP1_VERTEX_4);
- glDisable(GL_MAP1_INDEX);
- glDisable(GL_MAP1_COLOR_4);
- glDisable(GL_MAP1_NORMAL);
- glDisable(GL_MAP1_TEXTURE_COORD_1);
- glDisable(GL_MAP1_TEXTURE_COORD_2);
- glDisable(GL_MAP1_TEXTURE_COORD_3);
- glDisable(GL_MAP1_TEXTURE_COORD_4);
- glDisable(GL_MAP2_VERTEX_3);
- glDisable(GL_MAP2_VERTEX_4);
- glDisable(GL_MAP2_INDEX);
- glDisable(GL_MAP2_COLOR_4);
- glDisable(GL_MAP2_NORMAL);
- glDisable(GL_MAP2_TEXTURE_COORD_1);
- glDisable(GL_MAP2_TEXTURE_COORD_2);
- glDisable(GL_MAP2_TEXTURE_COORD_3);
- glDisable(GL_MAP2_TEXTURE_COORD_4);
- do_nurbs_curve(nobj);
- glPopAttrib();
- nobj->nurbs_type = GLU_NURBS_NONE;
-}
-
-
-void GLAPIENTRY
-gluNurbsCurve(GLUnurbsObj * nobj, GLint nknots, GLfloat * knot,
- GLint stride, GLfloat * ctlarray, GLint order, GLenum type)
-{
- if (nobj->nurbs_type == GLU_NURBS_TRIM) {
-#if 0
-/* TODO: NOT IMPLEMENTED YET */
- nurbs_trim *ptr1;
- trim_list *ptr2;
-
- if (type != GLU_MAP1_TRIM_2 && type != GLU_MAP1_TRIM_3) {
- call_user_error(nobj, GLU_NURBS_ERROR14);
- return;
- }
- for (ptr1 = nobj->trim; ptr1->next; ptr1 = ptr1->next);
- if (ptr1->trim_loop) {
- for (ptr2 = ptr1->trim_loop; ptr2->next; ptr2 = ptr2->next);
- if ((ptr2->next = (trim_list *) malloc(sizeof(trim_list))) == NULL) {
- call_user_error(nobj, GLU_OUT_OF_MEMORY);
- return;
- }
- ptr2 = ptr2->next;
- }
- else {
- if ((ptr2 = (trim_list *) malloc(sizeof(trim_list))) == NULL) {
- call_user_error(nobj, GLU_OUT_OF_MEMORY);
- return;
- }
- ptr1->trim_loop = ptr2;
- }
- ptr2->trim_type = GLU_TRIM_NURBS;
- ptr2->curve.nurbs_curve.knot_count = nknots;
- ptr2->curve.nurbs_curve.knot = knot;
- ptr2->curve.nurbs_curve.stride = stride;
- ptr2->curve.nurbs_curve.ctrlarray = ctlarray;
- ptr2->curve.nurbs_curve.order = order;
- ptr2->curve.nurbs_curve.dim = (type == GLU_MAP1_TRIM_2 ? 2 : 3);
- ptr2->curve.nurbs_curve.type = type;
- ptr2->next = NULL;
-#endif
- }
- else {
- if (type == GLU_MAP1_TRIM_2 || type == GLU_MAP1_TRIM_3) {
- call_user_error(nobj, GLU_NURBS_ERROR22);
- return;
- }
- if (nobj->nurbs_type != GLU_NURBS_CURVE) {
- call_user_error(nobj, GLU_NURBS_ERROR10);
- return;
- }
- switch (type) {
- case GL_MAP1_VERTEX_3:
- case GL_MAP1_VERTEX_4:
- if (nobj->curve.geom.type != GLU_INVALID_ENUM) {
- call_user_error(nobj, GLU_NURBS_ERROR8);
- return;
- }
- nobj->curve.geom.type = type;
- nobj->curve.geom.knot_count = nknots;
- nobj->curve.geom.knot = knot;
- nobj->curve.geom.stride = stride;
- nobj->curve.geom.ctrlarray = ctlarray;
- nobj->curve.geom.order = order;
- break;
- case GL_MAP1_INDEX:
- case GL_MAP1_COLOR_4:
- nobj->curve.color.type = type;
- nobj->curve.color.knot_count = nknots;
- nobj->curve.color.knot = knot;
- nobj->curve.color.stride = stride;
- nobj->curve.color.ctrlarray = ctlarray;
- nobj->curve.color.order = order;
- break;
- case GL_MAP1_NORMAL:
- nobj->curve.normal.type = type;
- nobj->curve.normal.knot_count = nknots;
- nobj->curve.normal.knot = knot;
- nobj->curve.normal.stride = stride;
- nobj->curve.normal.ctrlarray = ctlarray;
- nobj->curve.normal.order = order;
- break;
- case GL_MAP1_TEXTURE_COORD_1:
- case GL_MAP1_TEXTURE_COORD_2:
- case GL_MAP1_TEXTURE_COORD_3:
- case GL_MAP1_TEXTURE_COORD_4:
- nobj->curve.texture.type = type;
- nobj->curve.texture.knot_count = nknots;
- nobj->curve.texture.knot = knot;
- nobj->curve.texture.stride = stride;
- nobj->curve.texture.ctrlarray = ctlarray;
- nobj->curve.texture.order = order;
- break;
- default:
- call_user_error(nobj, GLU_INVALID_ENUM);
- }
- }
-}
-
-
-void GLAPIENTRY
-gluBeginSurface(GLUnurbsObj * nobj)
-{
- switch (nobj->nurbs_type) {
- case GLU_NURBS_NONE:
- nobj->nurbs_type = GLU_NURBS_SURFACE;
- nobj->surface.geom.type = GLU_INVALID_ENUM;
- nobj->surface.color.type = GLU_INVALID_ENUM;
- nobj->surface.texture.type = GLU_INVALID_ENUM;
- nobj->surface.normal.type = GLU_INVALID_ENUM;
- break;
- case GLU_NURBS_TRIM:
- call_user_error(nobj, GLU_NURBS_ERROR16);
- break;
- case GLU_NURBS_SURFACE:
- case GLU_NURBS_NO_TRIM:
- case GLU_NURBS_TRIM_DONE:
- call_user_error(nobj, GLU_NURBS_ERROR27);
- break;
- case GLU_NURBS_CURVE:
- call_user_error(nobj, GLU_NURBS_ERROR6);
- break;
- }
-}
-
-
-void GLAPIENTRY
-gluEndSurface(GLUnurbsObj * nobj)
-{
- switch (nobj->nurbs_type) {
- case GLU_NURBS_NONE:
- call_user_error(nobj, GLU_NURBS_ERROR13);
- break;
- case GLU_NURBS_TRIM:
- call_user_error(nobj, GLU_NURBS_ERROR12);
- break;
- case GLU_NURBS_TRIM_DONE:
-/* if(nobj->trim->trim_loop==NULL)
- {
- call_user_error(nobj,GLU_NURBS_ERROR18);
- return;
- }*/
- /* no break - fallthrough */
- case GLU_NURBS_NO_TRIM:
- glPushAttrib((GLbitfield)
- (GL_EVAL_BIT | GL_ENABLE_BIT | GL_POLYGON_BIT));
- glDisable(GL_MAP2_VERTEX_3);
- glDisable(GL_MAP2_VERTEX_4);
- glDisable(GL_MAP2_INDEX);
- glDisable(GL_MAP2_COLOR_4);
- glDisable(GL_MAP2_NORMAL);
- glDisable(GL_MAP2_TEXTURE_COORD_1);
- glDisable(GL_MAP2_TEXTURE_COORD_2);
- glDisable(GL_MAP2_TEXTURE_COORD_3);
- glDisable(GL_MAP2_TEXTURE_COORD_4);
-/* glDisable(GL_MAP1_VERTEX_3);
- glDisable(GL_MAP1_VERTEX_4);
- glDisable(GL_MAP1_INDEX);
- glDisable(GL_MAP1_COLOR_4);
- glDisable(GL_MAP1_NORMAL);
- glDisable(GL_MAP1_TEXTURE_COORD_1);
- glDisable(GL_MAP1_TEXTURE_COORD_2);
- glDisable(GL_MAP1_TEXTURE_COORD_3);
- glDisable(GL_MAP1_TEXTURE_COORD_4);*/
- do_nurbs_surface(nobj);
- glPopAttrib();
- break;
- default:
- call_user_error(nobj, GLU_NURBS_ERROR8);
- }
- nobj->nurbs_type = GLU_NURBS_NONE;
-}
-
-
-void GLAPIENTRY
-gluNurbsSurface(GLUnurbsObj * nobj,
- GLint sknot_count, GLfloat * sknot,
- GLint tknot_count, GLfloat * tknot,
- GLint s_stride, GLint t_stride,
- GLfloat * ctrlarray, GLint sorder, GLint torder, GLenum type)
-{
- if (nobj->nurbs_type == GLU_NURBS_NO_TRIM
- || nobj->nurbs_type == GLU_NURBS_TRIM
- || nobj->nurbs_type == GLU_NURBS_TRIM_DONE) {
- if (type == GL_MAP2_VERTEX_3 || type == GL_MAP2_VERTEX_4) {
- call_user_error(nobj, GLU_NURBS_ERROR8);
- return;
- }
- }
- else if (nobj->nurbs_type != GLU_NURBS_SURFACE) {
- call_user_error(nobj, GLU_NURBS_ERROR11);
- return;
- }
- switch (type) {
- case GL_MAP2_VERTEX_3:
- case GL_MAP2_VERTEX_4:
- nobj->surface.geom.sknot_count = sknot_count;
- nobj->surface.geom.sknot = sknot;
- nobj->surface.geom.tknot_count = tknot_count;
- nobj->surface.geom.tknot = tknot;
- nobj->surface.geom.s_stride = s_stride;
- nobj->surface.geom.t_stride = t_stride;
- nobj->surface.geom.ctrlarray = ctrlarray;
- nobj->surface.geom.sorder = sorder;
- nobj->surface.geom.torder = torder;
- nobj->surface.geom.type = type;
- nobj->nurbs_type = GLU_NURBS_NO_TRIM;
- break;
- case GL_MAP2_INDEX:
- case GL_MAP2_COLOR_4:
- nobj->surface.color.sknot_count = sknot_count;
- nobj->surface.color.sknot = sknot;
- nobj->surface.color.tknot_count = tknot_count;
- nobj->surface.color.tknot = tknot;
- nobj->surface.color.s_stride = s_stride;
- nobj->surface.color.t_stride = t_stride;
- nobj->surface.color.ctrlarray = ctrlarray;
- nobj->surface.color.sorder = sorder;
- nobj->surface.color.torder = torder;
- nobj->surface.color.type = type;
- break;
- case GL_MAP2_NORMAL:
- nobj->surface.normal.sknot_count = sknot_count;
- nobj->surface.normal.sknot = sknot;
- nobj->surface.normal.tknot_count = tknot_count;
- nobj->surface.normal.tknot = tknot;
- nobj->surface.normal.s_stride = s_stride;
- nobj->surface.normal.t_stride = t_stride;
- nobj->surface.normal.ctrlarray = ctrlarray;
- nobj->surface.normal.sorder = sorder;
- nobj->surface.normal.torder = torder;
- nobj->surface.normal.type = type;
- break;
- case GL_MAP2_TEXTURE_COORD_1:
- case GL_MAP2_TEXTURE_COORD_2:
- case GL_MAP2_TEXTURE_COORD_3:
- case GL_MAP2_TEXTURE_COORD_4:
- nobj->surface.texture.sknot_count = sknot_count;
- nobj->surface.texture.sknot = sknot;
- nobj->surface.texture.tknot_count = tknot_count;
- nobj->surface.texture.tknot = tknot;
- nobj->surface.texture.s_stride = s_stride;
- nobj->surface.texture.t_stride = t_stride;
- nobj->surface.texture.ctrlarray = ctrlarray;
- nobj->surface.texture.sorder = sorder;
- nobj->surface.texture.torder = torder;
- nobj->surface.texture.type = type;
- break;
- default:
- call_user_error(nobj, GLU_INVALID_ENUM);
- }
-}
-
-
-void GLAPIENTRY
-gluNurbsCallback(GLUnurbsObj * nobj, GLenum which, void (GLCALLBACK * fn) ())
-{
- nobj->error_callback = (void (GLCALLBACKPCAST) (GLenum)) fn;
-
- if (which != GLU_ERROR)
- call_user_error(nobj, GLU_INVALID_ENUM);
-}
-
-void GLAPIENTRY
-gluBeginTrim(GLUnurbsObj * nobj)
-{
-#if 0
- nurbs_trim *ptr;
-#endif
-
- if (nobj->nurbs_type != GLU_NURBS_TRIM_DONE)
- if (nobj->nurbs_type != GLU_NURBS_NO_TRIM) {
- call_user_error(nobj, GLU_NURBS_ERROR15);
- return;
- }
- nobj->nurbs_type = GLU_NURBS_TRIM;
- fprintf(stderr, "NURBS - trimming not supported yet\n");
-#if 0
- if ((ptr = (nurbs_trim *) malloc(sizeof(nurbs_trim))) == NULL) {
- call_user_error(nobj, GLU_OUT_OF_MEMORY);
- return;
- }
- if (nobj->trim) {
- nurbs_trim *tmp_ptr;
-
- for (tmp_ptr = nobj->trim; tmp_ptr->next; tmp_ptr = tmp_ptr->next);
- tmp_ptr->next = ptr;
- }
- else
- nobj->trim = ptr;
- ptr->trim_loop = NULL;
- ptr->segments = NULL;
- ptr->next = NULL;
-#endif
-}
-
-void GLAPIENTRY
-gluPwlCurve(GLUnurbsObj * nobj, GLint count, GLfloat * array, GLint stride,
- GLenum type)
-{
-#if 0
- nurbs_trim *ptr1;
- trim_list *ptr2;
-#endif
- if (nobj->nurbs_type == GLU_NURBS_CURVE) {
- call_user_error(nobj, GLU_NURBS_ERROR9);
- return;
- }
- if (nobj->nurbs_type == GLU_NURBS_NONE) {
- call_user_error(nobj, GLU_NURBS_ERROR19);
- return;
- }
- if (type != GLU_MAP1_TRIM_2 && type != GLU_MAP1_TRIM_3) {
- call_user_error(nobj, GLU_NURBS_ERROR14);
- return;
- }
-#if 0
- for (ptr1 = nobj->trim; ptr1->next; ptr1 = ptr1->next);
- if (ptr1->trim_loop) {
- for (ptr2 = ptr1->trim_loop; ptr2->next; ptr2 = ptr2->next);
- if ((ptr2->next = (trim_list *) malloc(sizeof(trim_list))) == NULL) {
- call_user_error(nobj, GLU_OUT_OF_MEMORY);
- return;
- }
- ptr2 = ptr2->next;
- }
- else {
- if ((ptr2 = (trim_list *) malloc(sizeof(trim_list))) == NULL) {
- call_user_error(nobj, GLU_OUT_OF_MEMORY);
- return;
- }
- ptr1->trim_loop = ptr2;
- }
- ptr2->trim_type = GLU_TRIM_PWL;
- ptr2->curve.pwl_curve.pt_count = count;
- ptr2->curve.pwl_curve.ctrlarray = array;
- ptr2->curve.pwl_curve.stride = stride;
- ptr2->curve.pwl_curve.dim = (type == GLU_MAP1_TRIM_2 ? 2 : 3);
- ptr2->curve.pwl_curve.type = type;
- ptr2->next = NULL;
-#endif
-}
-
-void GLAPIENTRY
-gluEndTrim(GLUnurbsObj * nobj)
-{
- if (nobj->nurbs_type != GLU_NURBS_TRIM) {
- call_user_error(nobj, GLU_NURBS_ERROR17);
- return;
- }
- nobj->nurbs_type = GLU_NURBS_TRIM_DONE;
-}
+++ /dev/null
-
-/*
- * Mesa 3-D graphics library
- * Version: 3.3
- * Copyright (C) 1995-2000 Brian Paul
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-
-/*
- * NURBS implementation written by Bogdan Sikorski (bogdan@cira.it)
- * See README2 for more info.
- */
-
-
-#ifndef NURBS_H
-#define NURBS_H
-
-
-#define EPSILON 1e-06 /* epsilon for double precision compares */
-
-typedef enum
-{
- GLU_NURBS_CURVE, GLU_NURBS_SURFACE, GLU_NURBS_TRIM, GLU_NURBS_NO_TRIM,
- GLU_NURBS_TRIM_DONE, GLU_NURBS_NONE
-}
-GLU_nurbs_enum;
-
-typedef enum
-{
- GLU_TRIM_NURBS, GLU_TRIM_PWL
-}
-GLU_trim_enum;
-
-typedef struct
-{
- GLint sknot_count;
- GLfloat *sknot;
- GLint tknot_count;
- GLfloat *tknot;
- GLint s_stride;
- GLint t_stride;
- GLfloat *ctrlarray;
- GLint sorder;
- GLint torder;
- GLint dim;
- GLenum type;
-}
-surface_attribs;
-
-typedef struct
-{
- surface_attribs geom;
- surface_attribs color;
- surface_attribs texture;
- surface_attribs normal;
-}
-nurbs_surface;
-
-typedef struct
-{
- GLint knot_count;
- GLfloat *knot;
- GLint stride;
- GLfloat *ctrlarray;
- GLint order;
- GLint dim;
- GLenum type;
-}
-curve_attribs;
-
-typedef struct
-{
- GLint pt_count;
- GLfloat *ctrlarray;
- GLint stride;
- GLint dim;
- GLenum type;
-}
-pwl_curve_attribs;
-
-typedef struct
-{
- curve_attribs geom;
- curve_attribs color;
- curve_attribs texture;
- curve_attribs normal;
-}
-nurbs_curve;
-
-typedef struct trim_list_str
-{
- GLU_trim_enum trim_type;
- union
- {
- pwl_curve_attribs pwl_curve;
- curve_attribs nurbs_curve;
- }
- curve;
- struct trim_list_str *next;
-}
-trim_list;
-
-typedef struct seg_trim_str
-{
- GLfloat *points;
- GLint pt_cnt, seg_array_len;
- struct seg_trim_str *next;
-}
-trim_segments;
-
-typedef struct nurbs_trim_str
-{
- trim_list *trim_loop;
- trim_segments *segments;
- struct nurbs_trim_str *next;
-}
-nurbs_trim;
-
-typedef struct
-{
- GLfloat model[16], proj[16], viewport[4];
-}
-culling_and_sampling_str;
-
-struct GLUnurbs
-{
- GLboolean culling;
- GLenum error;
- void (GLCALLBACK * error_callback) (GLenum err);
- GLenum display_mode;
- GLU_nurbs_enum nurbs_type;
- GLboolean auto_load_matrix;
- culling_and_sampling_str sampling_matrices;
- GLenum sampling_method;
- GLfloat sampling_tolerance;
- GLfloat parametric_tolerance;
- GLint u_step, v_step;
- nurbs_surface surface;
- nurbs_curve curve;
- nurbs_trim *trim;
-};
-
-typedef struct
-{
- GLfloat *knot;
- GLint nknots;
- GLfloat *unified_knot;
- GLint unified_nknots;
- GLint order;
- GLint t_min, t_max;
- GLint delta_nknots;
- GLboolean open_at_begin, open_at_end;
- GLfloat *new_knot;
- GLfloat *alpha;
-}
-knot_str_type;
-
-typedef struct
-{
- GLfloat *geom_ctrl;
- GLint geom_s_stride, geom_t_stride;
- GLfloat **geom_offsets;
- GLint geom_s_pt_cnt, geom_t_pt_cnt;
- GLfloat *color_ctrl;
- GLint color_s_stride, color_t_stride;
- GLfloat **color_offsets;
- GLint color_s_pt_cnt, color_t_pt_cnt;
- GLfloat *normal_ctrl;
- GLint normal_s_stride, normal_t_stride;
- GLfloat **normal_offsets;
- GLint normal_s_pt_cnt, normal_t_pt_cnt;
- GLfloat *texture_ctrl;
- GLint texture_s_stride, texture_t_stride;
- GLfloat **texture_offsets;
- GLint texture_s_pt_cnt, texture_t_pt_cnt;
- GLint s_bezier_cnt, t_bezier_cnt;
-}
-new_ctrl_type;
-
-extern void call_user_error(GLUnurbsObj * nobj, GLenum error);
-
-extern GLenum test_knot(GLint nknots, GLfloat * knot, GLint order);
-
-extern GLenum explode_knot(knot_str_type * the_knot);
-
-extern GLenum calc_alphas(knot_str_type * the_knot);
-
-extern GLenum calc_new_ctrl_pts(GLfloat * ctrl, GLint stride,
- knot_str_type * the_knot, GLint dim,
- GLfloat ** new_ctrl, GLint * ncontrol);
-
-extern GLenum glu_do_sampling_crv(GLUnurbsObj * nobj, GLfloat * new_ctrl,
- GLint n_ctrl, GLint order, GLint dim,
- GLint ** factors);
-
-extern GLenum glu_do_sampling_3D(GLUnurbsObj * nobj, new_ctrl_type * new_ctrl,
- int **sfactors, GLint ** tfactors);
-
-extern GLenum glu_do_sampling_uv(GLUnurbsObj * nobj, new_ctrl_type * new_ctrl,
- int **sfactors, GLint ** tfactors);
-
-extern GLenum glu_do_sampling_param_3D(GLUnurbsObj * nobj,
- new_ctrl_type * new_ctrl,
- int **sfactors, GLint ** tfactors);
-
-extern GLboolean fine_culling_test_2D(GLUnurbsObj * nobj, GLfloat * ctrl,
- GLint n_ctrl, GLint stride, GLint dim);
-
-extern GLboolean fine_culling_test_3D(GLUnurbsObj * nobj, GLfloat * ctrl,
- GLint s_n_ctrl, GLint t_n_ctrl,
- GLint s_stride, GLint t_stride,
- GLint dim);
-
-extern void do_nurbs_curve(GLUnurbsObj * nobj);
-
-extern void do_nurbs_surface(GLUnurbsObj * nobj);
-
-extern GLenum patch_trimming(GLUnurbsObj * nobj, new_ctrl_type * new_ctrl,
- GLint * sfactors, GLint * tfactors);
-
-extern void collect_unified_knot(knot_str_type * dest, knot_str_type * src,
- GLfloat maximal_min_knot,
- GLfloat minimal_max_knot);
-
-extern GLenum select_knot_working_range(GLUnurbsObj * nobj,
- knot_str_type * geom_knot,
- knot_str_type * color_knot,
- knot_str_type * normal_knot,
- knot_str_type * texture_knot);
-
-extern void free_unified_knots(knot_str_type * geom_knot,
- knot_str_type * color_knot,
- knot_str_type * normal_knot,
- knot_str_type * texture_knot);
-
-
-
-#endif
+++ /dev/null
-
-/*
- * Mesa 3-D graphics library
- * Version: 3.3
- * Copyright (C) 1995-2000 Brian Paul
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-
-/*
- * NURBS implementation written by Bogdan Sikorski (bogdan@cira.it)
- * See README2 for more info.
- */
-
-
-#ifdef PC_HEADER
-#include "all.h"
-#else
-#include <math.h>
-#include <stdlib.h>
-#include "gluP.h"
-#include "nurbs.h"
-#endif
-
-
-static int
-get_curve_dim(GLenum type)
-{
- switch (type) {
- case GL_MAP1_VERTEX_3:
- return 3;
- case GL_MAP1_VERTEX_4:
- return 4;
- case GL_MAP1_INDEX:
- return 1;
- case GL_MAP1_COLOR_4:
- return 4;
- case GL_MAP1_NORMAL:
- return 3;
- case GL_MAP1_TEXTURE_COORD_1:
- return 1;
- case GL_MAP1_TEXTURE_COORD_2:
- return 2;
- case GL_MAP1_TEXTURE_COORD_3:
- return 3;
- case GL_MAP1_TEXTURE_COORD_4:
- return 4;
- default:
- abort(); /* TODO: is this OK? */
- }
- return 0; /*never get here */
-}
-
-static GLenum
-test_nurbs_curve(GLUnurbsObj * nobj, curve_attribs * attribs)
-{
- GLenum err;
- GLint tmp_int;
-
- if (attribs->order < 0) {
- call_user_error(nobj, GLU_INVALID_VALUE);
- return GLU_ERROR;
- }
- glGetIntegerv(GL_MAX_EVAL_ORDER, &tmp_int);
- if (attribs->order > tmp_int || attribs->order < 2) {
- call_user_error(nobj, GLU_NURBS_ERROR1);
- return GLU_ERROR;
- }
- if (attribs->knot_count < attribs->order + 2) {
- call_user_error(nobj, GLU_NURBS_ERROR2);
- return GLU_ERROR;
- }
- if (attribs->stride < 0) {
- call_user_error(nobj, GLU_NURBS_ERROR34);
- return GLU_ERROR;
- }
- if (attribs->knot == NULL || attribs->ctrlarray == NULL) {
- call_user_error(nobj, GLU_NURBS_ERROR36);
- return GLU_ERROR;
- }
- if ((err = test_knot(attribs->knot_count, attribs->knot, attribs->order))
- != GLU_NO_ERROR) {
- call_user_error(nobj, err);
- return GLU_ERROR;
- }
- return GLU_NO_ERROR;
-}
-
-static GLenum
-test_nurbs_curves(GLUnurbsObj * nobj)
-{
- /* test the geometric data */
- if (test_nurbs_curve(nobj, &(nobj->curve.geom)) != GLU_NO_ERROR)
- return GLU_ERROR;
- /* now test the attributive data */
- /* color */
- if (nobj->curve.color.type != GLU_INVALID_ENUM)
- if (test_nurbs_curve(nobj, &(nobj->curve.color)) != GLU_NO_ERROR)
- return GLU_ERROR;
- /* normal */
- if (nobj->curve.normal.type != GLU_INVALID_ENUM)
- if (test_nurbs_curve(nobj, &(nobj->curve.normal)) != GLU_NO_ERROR)
- return GLU_ERROR;
- /* texture */
- if (nobj->curve.texture.type != GLU_INVALID_ENUM)
- if (test_nurbs_curve(nobj, &(nobj->curve.texture)) != GLU_NO_ERROR)
- return GLU_ERROR;
- return GLU_NO_ERROR;
-}
-
-/* prepare the knot information structures */
-static GLenum
-fill_knot_structures(GLUnurbsObj * nobj, knot_str_type * geom_knot,
- knot_str_type * color_knot, knot_str_type * normal_knot,
- knot_str_type * texture_knot)
-{
- GLint order;
- GLfloat *knot;
- GLint nknots;
- GLint t_min, t_max;
-
- geom_knot->unified_knot = NULL;
- knot = geom_knot->knot = nobj->curve.geom.knot;
- nknots = geom_knot->nknots = nobj->curve.geom.knot_count;
- order = geom_knot->order = nobj->curve.geom.order;
- geom_knot->delta_nknots = 0;
- t_min = geom_knot->t_min = order - 1;
- t_max = geom_knot->t_max = nknots - order;
- if (fabs(knot[t_min] - knot[t_max]) < EPSILON) {
- call_user_error(nobj, GLU_NURBS_ERROR3);
- return GLU_ERROR;
- }
- if (fabs(knot[0] - knot[t_min]) < EPSILON) {
- /* knot open at beggining */
- geom_knot->open_at_begin = GL_TRUE;
- }
- else
- geom_knot->open_at_begin = GL_FALSE;
- if (fabs(knot[t_max] - knot[nknots - 1]) < EPSILON) {
- /* knot open at end */
- geom_knot->open_at_end = GL_TRUE;
- }
- else
- geom_knot->open_at_end = GL_FALSE;
- if (nobj->curve.color.type != GLU_INVALID_ENUM) {
- color_knot->unified_knot = (GLfloat *) 1;
- knot = color_knot->knot = nobj->curve.color.knot;
- nknots = color_knot->nknots = nobj->curve.color.knot_count;
- order = color_knot->order = nobj->curve.color.order;
- color_knot->delta_nknots = 0;
- t_min = color_knot->t_min = order - 1;
- t_max = color_knot->t_max = nknots - order;
- if (fabs(knot[t_min] - knot[t_max]) < EPSILON) {
- call_user_error(nobj, GLU_NURBS_ERROR3);
- return GLU_ERROR;
- }
- if (fabs(knot[0] - knot[t_min]) < EPSILON) {
- /* knot open at beggining */
- color_knot->open_at_begin = GL_TRUE;
- }
- else
- color_knot->open_at_begin = GL_FALSE;
- if (fabs(knot[t_max] - knot[nknots - 1]) < EPSILON) {
- /* knot open at end */
- color_knot->open_at_end = GL_TRUE;
- }
- else
- color_knot->open_at_end = GL_FALSE;
- }
- else
- color_knot->unified_knot = NULL;
- if (nobj->curve.normal.type != GLU_INVALID_ENUM) {
- normal_knot->unified_knot = (GLfloat *) 1;
- knot = normal_knot->knot = nobj->curve.normal.knot;
- nknots = normal_knot->nknots = nobj->curve.normal.knot_count;
- order = normal_knot->order = nobj->curve.normal.order;
- normal_knot->delta_nknots = 0;
- t_min = normal_knot->t_min = order - 1;
- t_max = normal_knot->t_max = nknots - order;
- if (fabs(knot[t_min] - knot[t_max]) < EPSILON) {
- call_user_error(nobj, GLU_NURBS_ERROR3);
- return GLU_ERROR;
- }
- if (fabs(knot[0] - knot[t_min]) < EPSILON) {
- /* knot open at beggining */
- normal_knot->open_at_begin = GL_TRUE;
- }
- else
- normal_knot->open_at_begin = GL_FALSE;
- if (fabs(knot[t_max] - knot[nknots - 1]) < EPSILON) {
- /* knot open at end */
- normal_knot->open_at_end = GL_TRUE;
- }
- else
- normal_knot->open_at_end = GL_FALSE;
- }
- else
- normal_knot->unified_knot = NULL;
- if (nobj->curve.texture.type != GLU_INVALID_ENUM) {
- texture_knot->unified_knot = (GLfloat *) 1;
- knot = texture_knot->knot = nobj->curve.texture.knot;
- nknots = texture_knot->nknots = nobj->curve.texture.knot_count;
- order = texture_knot->order = nobj->curve.texture.order;
- texture_knot->delta_nknots = 0;
- t_min = texture_knot->t_min = order - 1;
- t_max = texture_knot->t_max = nknots - order;
- if (fabs(knot[t_min] - knot[t_max]) < EPSILON) {
- call_user_error(nobj, GLU_NURBS_ERROR3);
- return GLU_ERROR;
- }
- if (fabs(knot[0] - knot[t_min]) < EPSILON) {
- /* knot open at beggining */
- texture_knot->open_at_begin = GL_TRUE;
- }
- else
- texture_knot->open_at_begin = GL_FALSE;
- if (fabs(knot[t_max] - knot[nknots - 1]) < EPSILON) {
- /* knot open at end */
- texture_knot->open_at_end = GL_TRUE;
- }
- else
- texture_knot->open_at_end = GL_FALSE;
- }
- else
- texture_knot->unified_knot = NULL;
- return GLU_NO_ERROR;
-}
-
-/* covert the NURBS curve into a series of adjacent Bezier curves */
-static GLenum
-convert_curve(knot_str_type * the_knot, curve_attribs * attrib,
- GLfloat ** new_ctrl, GLint * ncontrol)
-{
- GLenum err;
-
- if ((err = explode_knot(the_knot)) != GLU_NO_ERROR) {
- if (the_knot->unified_knot) {
- free(the_knot->unified_knot);
- the_knot->unified_knot = NULL;
- }
- return err;
- }
- if (the_knot->unified_knot) {
- free(the_knot->unified_knot);
- the_knot->unified_knot = NULL;
- }
- if ((err = calc_alphas(the_knot)) != GLU_NO_ERROR) {
- free(the_knot->new_knot);
- return err;
- }
- free(the_knot->new_knot);
- if ((err = calc_new_ctrl_pts(attrib->ctrlarray, attrib->stride, the_knot,
- attrib->dim, new_ctrl, ncontrol))
- != GLU_NO_ERROR) {
- free(the_knot->alpha);
- return err;
- }
- free(the_knot->alpha);
- return GLU_NO_ERROR;
-}
-
-/* covert curves - geometry and possible attribute ones into equivalent */
-/* sequence of adjacent Bezier curves */
-static GLenum
-convert_curves(GLUnurbsObj * nobj, GLfloat ** new_geom_ctrl,
- GLint * ncontrol, GLfloat ** new_color_ctrl,
- GLfloat ** new_normal_ctrl, GLfloat ** new_texture_ctrl)
-{
- knot_str_type geom_knot, color_knot, normal_knot, texture_knot;
- GLint junk;
- GLenum err;
-
- *new_color_ctrl = *new_normal_ctrl = *new_texture_ctrl = NULL;
-
- if (fill_knot_structures(nobj, &geom_knot, &color_knot, &normal_knot,
- &texture_knot) != GLU_NO_ERROR)
- return GLU_ERROR;
-
- /* unify knots - all knots should have the same number of working */
- /* ranges */
- if (
- (err =
- select_knot_working_range(nobj, &geom_knot, &color_knot, &normal_knot,
- &texture_knot)) != GLU_NO_ERROR) {
- return err;
- }
- /* convert the geometry curve */
- nobj->curve.geom.dim = get_curve_dim(nobj->curve.geom.type);
- if ((err = convert_curve(&geom_knot, &(nobj->curve.geom), new_geom_ctrl,
- ncontrol)) != GLU_NO_ERROR) {
- free_unified_knots(&geom_knot, &color_knot, &normal_knot,
- &texture_knot);
- call_user_error(nobj, err);
- return err;
- }
- /* if additional attributive curves are given convert them as well */
- if (color_knot.unified_knot) {
- nobj->curve.color.dim = get_curve_dim(nobj->curve.color.type);
- if ((err = convert_curve(&color_knot, &(nobj->curve.color),
- new_color_ctrl, &junk)) != GLU_NO_ERROR) {
- free_unified_knots(&geom_knot, &color_knot, &normal_knot,
- &texture_knot);
- free(*new_geom_ctrl);
- call_user_error(nobj, err);
- return err;
- }
- }
- if (normal_knot.unified_knot) {
- nobj->curve.normal.dim = get_curve_dim(nobj->curve.normal.type);
- if ((err = convert_curve(&normal_knot, &(nobj->curve.normal),
- new_normal_ctrl, &junk)) != GLU_NO_ERROR) {
- free_unified_knots(&geom_knot, &color_knot, &normal_knot,
- &texture_knot);
- free(*new_geom_ctrl);
- if (*new_color_ctrl)
- free(*new_color_ctrl);
- call_user_error(nobj, err);
- return err;
- }
- }
- if (texture_knot.unified_knot) {
- nobj->curve.texture.dim = get_curve_dim(nobj->curve.texture.type);
- if ((err = convert_curve(&texture_knot, &(nobj->curve.texture),
- new_texture_ctrl, &junk)) != GLU_NO_ERROR) {
- free_unified_knots(&geom_knot, &color_knot, &normal_knot,
- &texture_knot);
- free(*new_geom_ctrl);
- if (*new_color_ctrl)
- free(*new_color_ctrl);
- if (*new_normal_ctrl)
- free(*new_normal_ctrl);
- call_user_error(nobj, err);
- return err;
- }
- }
- return GLU_NO_ERROR;
-}
-
-/* main NURBS curve procedure */
-void
-do_nurbs_curve(GLUnurbsObj * nobj)
-{
- GLint geom_order, color_order = 0, normal_order = 0, texture_order = 0;
- GLenum geom_type;
- GLint n_ctrl;
- GLfloat *new_geom_ctrl, *new_color_ctrl, *new_normal_ctrl,
- *new_texture_ctrl;
- GLfloat *geom_ctrl = 0, *color_ctrl = 0, *normal_ctrl = 0, *texture_ctrl = 0;
- GLint *factors;
- GLint i, j;
- GLint geom_dim, color_dim = 0, normal_dim = 0, texture_dim = 0;
-
- /* test the user supplied data */
- if (test_nurbs_curves(nobj) != GLU_NO_ERROR)
- return;
-
- if (convert_curves(nobj, &new_geom_ctrl, &n_ctrl, &new_color_ctrl,
- &new_normal_ctrl, &new_texture_ctrl) != GLU_NO_ERROR)
- return;
-
- geom_order = nobj->curve.geom.order;
- geom_type = nobj->curve.geom.type;
- geom_dim = nobj->curve.geom.dim;
-
- if (glu_do_sampling_crv(nobj, new_geom_ctrl, n_ctrl, geom_order, geom_dim,
- &factors) != GLU_NO_ERROR) {
- free(new_geom_ctrl);
- if (new_color_ctrl)
- free(new_color_ctrl);
- if (new_normal_ctrl)
- free(new_normal_ctrl);
- if (new_texture_ctrl)
- free(new_texture_ctrl);
- return;
- }
- glEnable(geom_type);
- if (new_color_ctrl) {
- glEnable(nobj->curve.color.type);
- color_dim = nobj->curve.color.dim;
- color_ctrl = new_color_ctrl;
- color_order = nobj->curve.color.order;
- }
- if (new_normal_ctrl) {
- glEnable(nobj->curve.normal.type);
- normal_dim = nobj->curve.normal.dim;
- normal_ctrl = new_normal_ctrl;
- normal_order = nobj->curve.normal.order;
- }
- if (new_texture_ctrl) {
- glEnable(nobj->curve.texture.type);
- texture_dim = nobj->curve.texture.dim;
- texture_ctrl = new_texture_ctrl;
- texture_order = nobj->curve.texture.order;
- }
- for (i = 0, j = 0, geom_ctrl = new_geom_ctrl;
- i < n_ctrl; i += geom_order, j++, geom_ctrl += geom_order * geom_dim) {
- if (fine_culling_test_2D
- (nobj, geom_ctrl, geom_order, geom_dim, geom_dim)) {
- color_ctrl += color_order * color_dim;
- normal_ctrl += normal_order * normal_dim;
- texture_ctrl += texture_order * texture_dim;
- continue;
- }
- glMap1f(geom_type, 0.0, 1.0, geom_dim, geom_order, geom_ctrl);
- if (new_color_ctrl) {
- glMap1f(nobj->curve.color.type, 0.0, 1.0, color_dim,
- color_order, color_ctrl);
- color_ctrl += color_order * color_dim;
- }
- if (new_normal_ctrl) {
- glMap1f(nobj->curve.normal.type, 0.0, 1.0, normal_dim,
- normal_order, normal_ctrl);
- normal_ctrl += normal_order * normal_dim;
- }
- if (new_texture_ctrl) {
- glMap1f(nobj->curve.texture.type, 0.0, 1.0, texture_dim,
- texture_order, texture_ctrl);
- texture_ctrl += texture_order * texture_dim;
- }
- glMapGrid1f(factors[j], 0.0, 1.0);
- glEvalMesh1(GL_LINE, 0, factors[j]);
- }
- free(new_geom_ctrl);
- free(factors);
- if (new_color_ctrl)
- free(new_color_ctrl);
- if (new_normal_ctrl)
- free(new_normal_ctrl);
- if (new_texture_ctrl)
- free(new_texture_ctrl);
-}
+++ /dev/null
-
-/*
- * Mesa 3-D graphics library
- * Version: 3.3
- * Copyright (C) 1995-2000 Brian Paul
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-
-/*
- * NURBS implementation written by Bogdan Sikorski (bogdan@cira.it)
- * See README2 for more info.
- */
-
-
-#ifdef PC_HEADER
-#include "all.h"
-#else
-#include <math.h>
-#include <stdlib.h>
-#include <string.h>
-#include "gluP.h"
-#include "nurbs.h"
-#endif
-
-
-static int
-get_surface_dim(GLenum type)
-{
- switch (type) {
- case GL_MAP2_VERTEX_3:
- return 3;
- case GL_MAP2_VERTEX_4:
- return 4;
- case GL_MAP2_INDEX:
- return 1;
- case GL_MAP2_COLOR_4:
- return 4;
- case GL_MAP2_NORMAL:
- return 3;
- case GL_MAP2_TEXTURE_COORD_1:
- return 1;
- case GL_MAP2_TEXTURE_COORD_2:
- return 2;
- case GL_MAP2_TEXTURE_COORD_3:
- return 3;
- case GL_MAP2_TEXTURE_COORD_4:
- return 4;
- default:
- abort(); /* TODO: is this OK? */
- }
- return 0; /*never get here */
-}
-
-static GLenum
-test_nurbs_surface(GLUnurbsObj * nobj, surface_attribs * attrib)
-{
- GLenum err;
- GLint tmp_int;
-
- if (attrib->sorder < 0 || attrib->torder < 0) {
- call_user_error(nobj, GLU_INVALID_VALUE);
- return GLU_ERROR;
- }
- glGetIntegerv(GL_MAX_EVAL_ORDER, &tmp_int);
- if (attrib->sorder > tmp_int || attrib->sorder < 2) {
- call_user_error(nobj, GLU_NURBS_ERROR1);
- return GLU_ERROR;
- }
- if (attrib->torder > tmp_int || attrib->torder < 2) {
- call_user_error(nobj, GLU_NURBS_ERROR1);
- return GLU_ERROR;
- }
- if (attrib->sknot_count < attrib->sorder + 2) {
- call_user_error(nobj, GLU_NURBS_ERROR2);
- return GLU_ERROR;
- }
- if (attrib->tknot_count < attrib->torder + 2) {
- call_user_error(nobj, GLU_NURBS_ERROR2);
- return GLU_ERROR;
- }
- if (attrib->s_stride < 0 || attrib->t_stride < 0) {
- call_user_error(nobj, GLU_NURBS_ERROR34);
- return GLU_ERROR;
- }
- if (attrib->sknot == NULL || attrib->tknot == NULL
- || attrib->ctrlarray == NULL) {
- call_user_error(nobj, GLU_NURBS_ERROR36);
- return GLU_ERROR;
- }
- if ((err = test_knot(attrib->tknot_count, attrib->tknot, attrib->torder))
- != GLU_NO_ERROR) {
- call_user_error(nobj, err);
- return GLU_ERROR;
- }
- if ((err = test_knot(attrib->sknot_count, attrib->sknot, attrib->sorder))
- != GLU_NO_ERROR) {
- call_user_error(nobj, err);
- return GLU_ERROR;
- }
- return GLU_NO_ERROR;
-}
-
-static GLenum
-test_nurbs_surfaces(GLUnurbsObj * nobj)
-{
- /* test the geometric data */
- if (test_nurbs_surface(nobj, &(nobj->surface.geom)) != GLU_NO_ERROR)
- return GLU_ERROR;
- /* now test the attributive data */
- /* color */
- if (nobj->surface.color.type != GLU_INVALID_ENUM)
- if (test_nurbs_surface(nobj, &(nobj->surface.color)) != GLU_NO_ERROR)
- return GLU_ERROR;
- /* normal */
- if (nobj->surface.normal.type != GLU_INVALID_ENUM)
- if (test_nurbs_surface(nobj, &(nobj->surface.normal)) != GLU_NO_ERROR)
- return GLU_ERROR;
- /* texture */
- if (nobj->surface.texture.type != GLU_INVALID_ENUM)
- if (test_nurbs_surface(nobj, &(nobj->surface.texture)) != GLU_NO_ERROR)
- return GLU_ERROR;
- return GLU_NO_ERROR;
-}
-
-static GLenum
-convert_surf(knot_str_type * s_knot, knot_str_type * t_knot,
- surface_attribs * attrib, GLfloat ** new_ctrl,
- GLint * s_n_ctrl, GLint * t_n_ctrl)
-{
- GLfloat **tmp_ctrl;
- GLfloat *ctrl_offset;
- GLint tmp_n_control;
- GLint i, j, t_cnt, s_cnt;
- GLint tmp_stride;
- GLint dim;
- GLenum err;
-
- /* valid range is empty? */
- if ((s_knot->unified_knot != NULL && s_knot->unified_nknots == 0) ||
- (t_knot->unified_knot != NULL && t_knot->unified_nknots == 0)) {
- if (s_knot->unified_knot) {
- free(s_knot->unified_knot);
- s_knot->unified_knot = NULL;
- }
- if (t_knot->unified_knot) {
- free(t_knot->unified_knot);
- t_knot->unified_knot = NULL;
- }
- *s_n_ctrl = 0;
- *t_n_ctrl = 0;
- return GLU_NO_ERROR;
- }
- t_cnt = attrib->tknot_count - attrib->torder;
- s_cnt = attrib->sknot_count - attrib->sorder;
- if ((tmp_ctrl = (GLfloat **) malloc(sizeof(GLfloat *) * t_cnt)) == NULL)
- return GLU_OUT_OF_MEMORY;
- if ((err = explode_knot(s_knot)) != GLU_NO_ERROR) {
- free(tmp_ctrl);
- if (s_knot->unified_knot) {
- free(s_knot->unified_knot);
- s_knot->unified_knot = NULL;
- }
- return err;
- }
- if (s_knot->unified_knot) {
- free(s_knot->unified_knot);
- s_knot->unified_knot = NULL;
- }
- if ((err = calc_alphas(s_knot)) != GLU_NO_ERROR) {
- free(tmp_ctrl);
- free(s_knot->new_knot);
- return err;
- }
- free(s_knot->new_knot);
- ctrl_offset = attrib->ctrlarray;
- dim = attrib->dim;
- for (i = 0; i < t_cnt; i++) {
- if ((err = calc_new_ctrl_pts(ctrl_offset, attrib->s_stride, s_knot,
- dim, &(tmp_ctrl[i]),
- &tmp_n_control)) != GLU_NO_ERROR) {
- for (--i; i <= 0; i--)
- free(tmp_ctrl[i]);
- free(tmp_ctrl);
- free(s_knot->alpha);
- return err;
- }
- ctrl_offset += attrib->t_stride;
- }
- free(s_knot->alpha);
- tmp_stride = dim * tmp_n_control;
- if ((*new_ctrl = (GLfloat *) malloc(sizeof(GLfloat) * tmp_stride * t_cnt))
- == NULL) {
- for (i = 0; i < t_cnt; i++)
- free(tmp_ctrl[i]);
- free(tmp_ctrl);
- return GLU_OUT_OF_MEMORY;
- }
- for (i = 0; i < tmp_n_control; i++)
- for (j = 0; j < t_cnt; j++)
- MEMCPY(*new_ctrl + j * dim + i * dim * t_cnt, tmp_ctrl[j] + dim * i,
- sizeof(GLfloat) * dim);
- for (i = 0; i < t_cnt; i++)
- free(tmp_ctrl[i]);
- free(tmp_ctrl);
- *s_n_ctrl = tmp_n_control;
-
- if ((tmp_ctrl = (GLfloat **) malloc(sizeof(GLfloat *) * (*s_n_ctrl))) ==
- NULL) {
- return GLU_OUT_OF_MEMORY;
- }
- if ((err = explode_knot(t_knot)) != GLU_NO_ERROR) {
- free(tmp_ctrl);
- if (t_knot->unified_knot) {
- free(t_knot->unified_knot);
- t_knot->unified_knot = NULL;
- }
- return err;
- }
- if (t_knot->unified_knot) {
- free(t_knot->unified_knot);
- t_knot->unified_knot = NULL;
- }
- if ((err = calc_alphas(t_knot)) != GLU_NO_ERROR) {
- free(tmp_ctrl);
- free(t_knot->new_knot);
- return err;
- }
- free(t_knot->new_knot);
- ctrl_offset = *new_ctrl;
- for (i = 0; i < (*s_n_ctrl); i++) {
- if ((err = calc_new_ctrl_pts(ctrl_offset, dim, t_knot,
- dim, &(tmp_ctrl[i]),
- &tmp_n_control)) != GLU_NO_ERROR) {
- for (--i; i <= 0; i--)
- free(tmp_ctrl[i]);
- free(tmp_ctrl);
- free(t_knot->alpha);
- return err;
- }
- ctrl_offset += dim * t_cnt;
- }
- free(t_knot->alpha);
- free(*new_ctrl);
- tmp_stride = dim * tmp_n_control;
- if (
- (*new_ctrl =
- (GLfloat *) malloc(sizeof(GLfloat) * tmp_stride * (*s_n_ctrl))) ==
- NULL) {
- for (i = 0; i < (*s_n_ctrl); i++)
- free(tmp_ctrl[i]);
- free(tmp_ctrl);
- return GLU_OUT_OF_MEMORY;
- }
- for (i = 0; i < (*s_n_ctrl); i++) {
- MEMCPY(*new_ctrl + i * tmp_stride, tmp_ctrl[i],
- sizeof(GLfloat) * tmp_stride);
- free(tmp_ctrl[i]);
- }
- free(tmp_ctrl);
- *t_n_ctrl = tmp_n_control;
- return GLU_NO_ERROR;
-}
-
-/* prepare the knot information structures */
-static GLenum
-fill_knot_structures(GLUnurbsObj * nobj,
- knot_str_type * geom_s_knot, knot_str_type * geom_t_knot,
- knot_str_type * color_s_knot,
- knot_str_type * color_t_knot,
- knot_str_type * normal_s_knot,
- knot_str_type * normal_t_knot,
- knot_str_type * texture_s_knot,
- knot_str_type * texture_t_knot)
-{
- GLint order;
- GLfloat *knot;
- GLint nknots;
- GLint t_min, t_max;
-
- geom_s_knot->unified_knot = NULL;
- knot = geom_s_knot->knot = nobj->surface.geom.sknot;
- nknots = geom_s_knot->nknots = nobj->surface.geom.sknot_count;
- order = geom_s_knot->order = nobj->surface.geom.sorder;
- geom_s_knot->delta_nknots = 0;
- t_min = geom_s_knot->t_min = order - 1;
- t_max = geom_s_knot->t_max = nknots - order;
- if (fabs(knot[t_min] - knot[t_max]) < EPSILON) {
- call_user_error(nobj, GLU_NURBS_ERROR3);
- return GLU_ERROR;
- }
- if (fabs(knot[0] - knot[t_min]) < EPSILON) {
- /* knot open at beggining */
- geom_s_knot->open_at_begin = GL_TRUE;
- }
- else
- geom_s_knot->open_at_begin = GL_FALSE;
- if (fabs(knot[t_max] - knot[nknots - 1]) < EPSILON) {
- /* knot open at end */
- geom_s_knot->open_at_end = GL_TRUE;
- }
- else
- geom_s_knot->open_at_end = GL_FALSE;
- geom_t_knot->unified_knot = NULL;
- knot = geom_t_knot->knot = nobj->surface.geom.tknot;
- nknots = geom_t_knot->nknots = nobj->surface.geom.tknot_count;
- order = geom_t_knot->order = nobj->surface.geom.torder;
- geom_t_knot->delta_nknots = 0;
- t_min = geom_t_knot->t_min = order - 1;
- t_max = geom_t_knot->t_max = nknots - order;
- if (fabs(knot[t_min] - knot[t_max]) < EPSILON) {
- call_user_error(nobj, GLU_NURBS_ERROR3);
- return GLU_ERROR;
- }
- if (fabs(knot[0] - knot[t_min]) < EPSILON) {
- /* knot open at beggining */
- geom_t_knot->open_at_begin = GL_TRUE;
- }
- else
- geom_t_knot->open_at_begin = GL_FALSE;
- if (fabs(knot[t_max] - knot[nknots - 1]) < EPSILON) {
- /* knot open at end */
- geom_t_knot->open_at_end = GL_TRUE;
- }
- else
- geom_t_knot->open_at_end = GL_FALSE;
-
- if (nobj->surface.color.type != GLU_INVALID_ENUM) {
- color_s_knot->unified_knot = (GLfloat *) 1;
- knot = color_s_knot->knot = nobj->surface.color.sknot;
- nknots = color_s_knot->nknots = nobj->surface.color.sknot_count;
- order = color_s_knot->order = nobj->surface.color.sorder;
- color_s_knot->delta_nknots = 0;
- t_min = color_s_knot->t_min = order - 1;
- t_max = color_s_knot->t_max = nknots - order;
- if (fabs(knot[t_min] - knot[t_max]) < EPSILON) {
- call_user_error(nobj, GLU_NURBS_ERROR3);
- return GLU_ERROR;
- }
- if (fabs(knot[0] - knot[t_min]) < EPSILON) {
- /* knot open at beggining */
- color_s_knot->open_at_begin = GL_TRUE;
- }
- else
- color_s_knot->open_at_begin = GL_FALSE;
- if (fabs(knot[t_max] - knot[nknots - 1]) < EPSILON) {
- /* knot open at end */
- color_s_knot->open_at_end = GL_TRUE;
- }
- else
- color_s_knot->open_at_end = GL_FALSE;
- color_t_knot->unified_knot = (GLfloat *) 1;
- knot = color_t_knot->knot = nobj->surface.color.tknot;
- nknots = color_t_knot->nknots = nobj->surface.color.tknot_count;
- order = color_t_knot->order = nobj->surface.color.torder;
- color_t_knot->delta_nknots = 0;
- t_min = color_t_knot->t_min = order - 1;
- t_max = color_t_knot->t_max = nknots - order;
- if (fabs(knot[t_min] - knot[t_max]) < EPSILON) {
- call_user_error(nobj, GLU_NURBS_ERROR3);
- return GLU_ERROR;
- }
- if (fabs(knot[0] - knot[t_min]) < EPSILON) {
- /* knot open at beggining */
- color_t_knot->open_at_begin = GL_TRUE;
- }
- else
- color_t_knot->open_at_begin = GL_FALSE;
- if (fabs(knot[t_max] - knot[nknots - 1]) < EPSILON) {
- /* knot open at end */
- color_t_knot->open_at_end = GL_TRUE;
- }
- else
- color_t_knot->open_at_end = GL_FALSE;
- }
- else {
- color_s_knot->unified_knot = NULL;
- color_t_knot->unified_knot = NULL;
- }
-
- if (nobj->surface.normal.type != GLU_INVALID_ENUM) {
- normal_s_knot->unified_knot = (GLfloat *) 1;
- knot = normal_s_knot->knot = nobj->surface.normal.sknot;
- nknots = normal_s_knot->nknots = nobj->surface.normal.sknot_count;
- order = normal_s_knot->order = nobj->surface.normal.sorder;
- normal_s_knot->delta_nknots = 0;
- t_min = normal_s_knot->t_min = order - 1;
- t_max = normal_s_knot->t_max = nknots - order;
- if (fabs(knot[t_min] - knot[t_max]) < EPSILON) {
- call_user_error(nobj, GLU_NURBS_ERROR3);
- return GLU_ERROR;
- }
- if (fabs(knot[0] - knot[t_min]) < EPSILON) {
- /* knot open at beggining */
- normal_s_knot->open_at_begin = GL_TRUE;
- }
- else
- normal_s_knot->open_at_begin = GL_FALSE;
- if (fabs(knot[t_max] - knot[nknots - 1]) < EPSILON) {
- /* knot open at end */
- normal_s_knot->open_at_end = GL_TRUE;
- }
- else
- normal_s_knot->open_at_end = GL_FALSE;
- normal_t_knot->unified_knot = (GLfloat *) 1;
- knot = normal_t_knot->knot = nobj->surface.normal.tknot;
- nknots = normal_t_knot->nknots = nobj->surface.normal.tknot_count;
- order = normal_t_knot->order = nobj->surface.normal.torder;
- normal_t_knot->delta_nknots = 0;
- t_min = normal_t_knot->t_min = order - 1;
- t_max = normal_t_knot->t_max = nknots - order;
- if (fabs(knot[t_min] - knot[t_max]) < EPSILON) {
- call_user_error(nobj, GLU_NURBS_ERROR3);
- return GLU_ERROR;
- }
- if (fabs(knot[0] - knot[t_min]) < EPSILON) {
- /* knot open at beggining */
- normal_t_knot->open_at_begin = GL_TRUE;
- }
- else
- normal_t_knot->open_at_begin = GL_FALSE;
- if (fabs(knot[t_max] - knot[nknots - 1]) < EPSILON) {
- /* knot open at end */
- normal_t_knot->open_at_end = GL_TRUE;
- }
- else
- normal_t_knot->open_at_end = GL_FALSE;
- }
- else {
- normal_s_knot->unified_knot = NULL;
- normal_t_knot->unified_knot = NULL;
- }
-
- if (nobj->surface.texture.type != GLU_INVALID_ENUM) {
- texture_s_knot->unified_knot = (GLfloat *) 1;
- knot = texture_s_knot->knot = nobj->surface.texture.sknot;
- nknots = texture_s_knot->nknots = nobj->surface.texture.sknot_count;
- order = texture_s_knot->order = nobj->surface.texture.sorder;
- texture_s_knot->delta_nknots = 0;
- t_min = texture_s_knot->t_min = order - 1;
- t_max = texture_s_knot->t_max = nknots - order;
- if (fabs(knot[t_min] - knot[t_max]) < EPSILON) {
- call_user_error(nobj, GLU_NURBS_ERROR3);
- return GLU_ERROR;
- }
- if (fabs(knot[0] - knot[t_min]) < EPSILON) {
- /* knot open at beggining */
- texture_s_knot->open_at_begin = GL_TRUE;
- }
- else
- texture_s_knot->open_at_begin = GL_FALSE;
- if (fabs(knot[t_max] - knot[nknots - 1]) < EPSILON) {
- /* knot open at end */
- texture_s_knot->open_at_end = GL_TRUE;
- }
- else
- texture_s_knot->open_at_end = GL_FALSE;
- texture_t_knot->unified_knot = (GLfloat *) 1;
- knot = texture_t_knot->knot = nobj->surface.texture.tknot;
- nknots = texture_t_knot->nknots = nobj->surface.texture.tknot_count;
- order = texture_t_knot->order = nobj->surface.texture.torder;
- texture_t_knot->delta_nknots = 0;
- t_min = texture_t_knot->t_min = order - 1;
- t_max = texture_t_knot->t_max = nknots - order;
- if (fabs(knot[t_min] - knot[t_max]) < EPSILON) {
- call_user_error(nobj, GLU_NURBS_ERROR3);
- return GLU_ERROR;
- }
- if (fabs(knot[0] - knot[t_min]) < EPSILON) {
- /* knot open at beggining */
- texture_t_knot->open_at_begin = GL_TRUE;
- }
- else
- texture_t_knot->open_at_begin = GL_FALSE;
- if (fabs(knot[t_max] - knot[nknots - 1]) < EPSILON) {
- /* knot open at end */
- texture_t_knot->open_at_end = GL_TRUE;
- }
- else
- texture_t_knot->open_at_end = GL_FALSE;
- }
- else {
- texture_s_knot->unified_knot = NULL;
- texture_t_knot->unified_knot = NULL;
- }
- return GLU_NO_ERROR;
-}
-
-
-static void
-free_new_ctrl(new_ctrl_type * p)
-{
- if (p->geom_ctrl)
- free(p->geom_ctrl);
- if (p->geom_offsets)
- free(p->geom_offsets);
- if (p->color_ctrl) {
- free(p->color_ctrl);
- if (p->color_offsets)
- free(p->color_offsets);
- }
- if (p->normal_ctrl) {
- free(p->normal_ctrl);
- if (p->normal_offsets)
- free(p->normal_offsets);
- }
- if (p->texture_ctrl) {
- free(p->texture_ctrl);
- if (p->texture_offsets)
- free(p->texture_offsets);
- }
-}
-
-/* convert surfaces - geometry and possible attribute ones into equivalent */
-/* sequence of adjacent Bezier patches */
-static GLenum
-convert_surfs(GLUnurbsObj * nobj, new_ctrl_type * new_ctrl)
-{
- knot_str_type geom_s_knot, color_s_knot, normal_s_knot, texture_s_knot;
- knot_str_type geom_t_knot, color_t_knot, normal_t_knot, texture_t_knot;
- GLenum err;
-
- if ((err = fill_knot_structures(nobj, &geom_s_knot, &geom_t_knot,
- &color_s_knot, &color_t_knot,
- &normal_s_knot, &normal_t_knot,
- &texture_s_knot,
- &texture_t_knot)) != GLU_NO_ERROR) {
- return err;
- }
- /* unify knots - all knots should have the same working range */
- if ((err = select_knot_working_range(nobj, &geom_s_knot, &color_s_knot,
- &normal_s_knot,
- &texture_s_knot)) != GLU_NO_ERROR) {
- call_user_error(nobj, err);
- return err;
- }
- if ((err = select_knot_working_range(nobj, &geom_t_knot, &color_t_knot,
- &normal_t_knot,
- &texture_t_knot)) != GLU_NO_ERROR) {
- free_unified_knots(&geom_s_knot, &color_s_knot, &normal_s_knot,
- &texture_s_knot);
- call_user_error(nobj, err);
- return err;
- }
-
- /* convert the geometry surface */
- nobj->surface.geom.dim = get_surface_dim(nobj->surface.geom.type);
- if ((err = convert_surf(&geom_s_knot, &geom_t_knot, &(nobj->surface.geom),
- &(new_ctrl->geom_ctrl), &(new_ctrl->geom_s_pt_cnt),
- &(new_ctrl->geom_t_pt_cnt))) != GLU_NO_ERROR) {
- free_unified_knots(&geom_s_knot, &color_s_knot, &normal_s_knot,
- &texture_s_knot);
- free_unified_knots(&geom_t_knot, &color_t_knot, &normal_t_knot,
- &texture_t_knot);
- call_user_error(nobj, err);
- return err;
- }
- /* if additional attributive surfaces are given convert them as well */
- if (color_s_knot.unified_knot) {
- nobj->surface.color.dim = get_surface_dim(nobj->surface.color.type);
- if (
- (err =
- convert_surf(&color_s_knot, &color_t_knot, &(nobj->surface.color),
- &(new_ctrl->color_ctrl), &(new_ctrl->color_s_pt_cnt),
- &(new_ctrl->color_t_pt_cnt))) != GLU_NO_ERROR) {
- free_unified_knots(&color_s_knot, &color_s_knot, &normal_s_knot,
- &texture_s_knot);
- free_unified_knots(&color_t_knot, &color_t_knot, &normal_t_knot,
- &texture_t_knot);
- free_new_ctrl(new_ctrl);
- call_user_error(nobj, err);
- return err;
- }
- }
- if (normal_s_knot.unified_knot) {
- nobj->surface.normal.dim = get_surface_dim(nobj->surface.normal.type);
- if ((err = convert_surf(&normal_s_knot, &normal_t_knot,
- &(nobj->surface.normal),
- &(new_ctrl->normal_ctrl),
- &(new_ctrl->normal_s_pt_cnt),
- &(new_ctrl->normal_t_pt_cnt))) !=
- GLU_NO_ERROR) {
- free_unified_knots(&normal_s_knot, &normal_s_knot, &normal_s_knot,
- &texture_s_knot);
- free_unified_knots(&normal_t_knot, &normal_t_knot, &normal_t_knot,
- &texture_t_knot);
- free_new_ctrl(new_ctrl);
- call_user_error(nobj, err);
- return err;
- }
- }
- if (texture_s_knot.unified_knot) {
- nobj->surface.texture.dim = get_surface_dim(nobj->surface.texture.type);
- if ((err = convert_surf(&texture_s_knot, &texture_t_knot,
- &(nobj->surface.texture),
- &(new_ctrl->texture_ctrl),
- &(new_ctrl->texture_s_pt_cnt),
- &(new_ctrl->texture_t_pt_cnt))) !=
- GLU_NO_ERROR) {
- free_unified_knots(&texture_s_knot, &texture_s_knot, &texture_s_knot,
- &texture_s_knot);
- free_unified_knots(&texture_t_knot, &texture_t_knot, &texture_t_knot,
- &texture_t_knot);
- free_new_ctrl(new_ctrl);
- call_user_error(nobj, err);
- return err;
- }
- }
- return GLU_NO_ERROR;
-}
-
-/* tesselate the "boundary" Bezier edge strips */
-static void
-tesselate_strip_t_line(GLint top_start, GLint top_end, GLint top_z,
- GLint bottom_start, GLint bottom_end, GLint bottom_z,
- GLint bottom_domain)
-{
- GLint top_cnt, bottom_cnt, tri_cnt, k;
- GLint direction;
-
- top_cnt = top_end - top_start;
- direction = (top_cnt >= 0 ? 1 : -1);
- bottom_cnt = bottom_end - bottom_start;
- glBegin(GL_LINES);
- while (top_cnt) {
- if (bottom_cnt)
- tri_cnt = top_cnt / bottom_cnt;
- else
- tri_cnt = abs(top_cnt);
- for (k = 0; k <= tri_cnt; k++, top_start += direction) {
- glEvalCoord2f((GLfloat) bottom_z / bottom_domain,
- (GLfloat) bottom_start / bottom_domain);
- glEvalPoint2(top_z, top_start);
- }
- if (bottom_cnt) {
- glEvalCoord2f((GLfloat) bottom_z / bottom_domain,
- (GLfloat) bottom_start / bottom_domain);
- bottom_start += direction;
- top_start -= direction;
- glEvalCoord2f((GLfloat) bottom_z / bottom_domain,
- (GLfloat) bottom_start / bottom_domain);
- glEvalCoord2f((GLfloat) bottom_z / bottom_domain,
- (GLfloat) bottom_start / bottom_domain);
- glEvalPoint2(top_z, top_start);
- }
- top_cnt -= direction * tri_cnt;
- bottom_cnt -= direction;
- }
- glEnd();
-}
-
-
-static void
-tesselate_strip_t_fill(GLint top_start, GLint top_end, GLint top_z,
- GLint bottom_start, GLint bottom_end, GLint bottom_z,
- GLint bottom_domain)
-{
- GLint top_cnt, bottom_cnt, tri_cnt, k;
- GLint direction;
-
- top_cnt = top_end - top_start;
- direction = (top_cnt >= 0 ? 1 : -1);
- bottom_cnt = bottom_end - bottom_start;
- while (top_cnt) {
- if (bottom_cnt)
- tri_cnt = top_cnt / bottom_cnt;
- else
- tri_cnt = abs(top_cnt);
- glBegin(GL_TRIANGLE_FAN);
- glEvalCoord2f((GLfloat) bottom_z / bottom_domain,
- (GLfloat) bottom_start / bottom_domain);
- for (k = 0; k <= tri_cnt; k++, top_start += direction)
- glEvalPoint2(top_z, top_start);
- if (bottom_cnt) {
- bottom_start += direction;
- top_start -= direction;
- glEvalCoord2f((GLfloat) bottom_z / bottom_domain,
- (GLfloat) bottom_start / bottom_domain);
- }
- glEnd();
- top_cnt -= direction * tri_cnt;
- bottom_cnt -= direction;
- }
-}
-
-
-static void
-tesselate_strip_t(GLenum display_mode, GLint top_start, GLint top_end,
- GLint top_z, GLint bottom_start, GLint bottom_end,
- GLint bottom_z, GLint bottom_domain)
-{
- if (display_mode == GL_FILL)
- tesselate_strip_t_fill(top_start, top_end, top_z, bottom_start,
- bottom_end, bottom_z, bottom_domain);
- else
- tesselate_strip_t_line(top_start, top_end, top_z, bottom_start,
- bottom_end, bottom_z, bottom_domain);
-}
-
-
-static void
-tesselate_strip_s_fill(GLint top_start, GLint top_end, GLint top_z,
- GLint bottom_start, GLint bottom_end, GLint bottom_z,
- GLfloat bottom_domain)
-{
- GLint top_cnt, bottom_cnt, tri_cnt, k;
- GLint direction;
-
- top_cnt = top_end - top_start;
- direction = (top_cnt >= 0 ? 1 : -1);
- bottom_cnt = bottom_end - bottom_start;
- while (top_cnt) {
- if (bottom_cnt)
- tri_cnt = top_cnt / bottom_cnt;
- else
- tri_cnt = abs(top_cnt);
- glBegin(GL_TRIANGLE_FAN);
- glEvalCoord2f((GLfloat) bottom_start / bottom_domain,
- (GLfloat) bottom_z / bottom_domain);
- for (k = 0; k <= tri_cnt; k++, top_start += direction)
- glEvalPoint2(top_start, top_z);
- if (bottom_cnt) {
- bottom_start += direction;
- top_start -= direction;
- glEvalCoord2f((GLfloat) bottom_start / bottom_domain,
- (GLfloat) bottom_z / bottom_domain);
- }
- glEnd();
- top_cnt -= direction * tri_cnt;
- bottom_cnt -= direction;
- }
-}
-
-
-static void
-tesselate_strip_s_line(GLint top_start, GLint top_end, GLint top_z,
- GLint bottom_start, GLint bottom_end, GLint bottom_z,
- GLfloat bottom_domain)
-{
- GLint top_cnt, bottom_cnt, tri_cnt, k;
- GLint direction;
-
- top_cnt = top_end - top_start;
- direction = (top_cnt >= 0 ? 1 : -1);
- bottom_cnt = bottom_end - bottom_start;
- glBegin(GL_LINES);
- while (top_cnt) {
- if (bottom_cnt)
- tri_cnt = top_cnt / bottom_cnt;
- else
- tri_cnt = abs(top_cnt);
- for (k = 0; k <= tri_cnt; k++, top_start += direction) {
- glEvalCoord2f((GLfloat) bottom_start / bottom_domain,
- (GLfloat) bottom_z / bottom_domain);
- glEvalPoint2(top_start, top_z);
- }
- if (bottom_cnt) {
- glEvalCoord2f((GLfloat) bottom_start / bottom_domain,
- (GLfloat) bottom_z / bottom_domain);
- bottom_start += direction;
- top_start -= direction;
- glEvalCoord2f((GLfloat) bottom_start / bottom_domain,
- (GLfloat) bottom_z / bottom_domain);
- glEvalPoint2(top_start, top_z);
- glEvalCoord2f((GLfloat) bottom_start / bottom_domain,
- (GLfloat) bottom_z / bottom_domain);
- }
- top_cnt -= direction * tri_cnt;
- bottom_cnt -= direction;
- }
- glEnd();
-}
-
-
-static void
-tesselate_strip_s(GLenum display_mode, GLint top_start, GLint top_end,
- GLint top_z, GLint bottom_start, GLint bottom_end,
- GLint bottom_z, GLfloat bottom_domain)
-{
- if (display_mode == GL_FILL)
- tesselate_strip_s_fill(top_start, top_end, top_z, bottom_start,
- bottom_end, bottom_z, bottom_domain);
- else
- tesselate_strip_s_line(top_start, top_end, top_z, bottom_start,
- bottom_end, bottom_z, bottom_domain);
-}
-
-static void
-tesselate_bottom_left_corner(GLenum display_mode, GLfloat s_1, GLfloat t_1)
-{
- if (display_mode == GL_FILL) {
- glBegin(GL_TRIANGLE_FAN);
- glEvalPoint2(1, 1);
- glEvalCoord2f(s_1, 0.0);
- glEvalCoord2f(0.0, 0.0);
- glEvalCoord2f(0.0, t_1);
- }
- else {
- glBegin(GL_LINES);
- glEvalCoord2f(0.0, 0.0);
- glEvalCoord2f(0.0, t_1);
- glEvalCoord2f(0.0, 0.0);
- glEvalPoint2(1, 1);
- glEvalCoord2f(0.0, 0.0);
- glEvalCoord2f(s_1, 0.0);
- }
- glEnd();
-}
-
-static void
-tesselate_bottom_right_corner(GLenum display_mode, GLint v_top,
- GLint v_bottom, GLfloat s_1, GLfloat t_1)
-{
- if (display_mode == GL_FILL) {
- glBegin(GL_TRIANGLE_FAN);
- glEvalPoint2(1, v_top);
- glEvalCoord2f(0.0, v_bottom * t_1);
- glEvalCoord2f(0.0, (v_bottom + 1) * t_1);
- glEvalCoord2f(s_1, (v_bottom + 1) * t_1);
- }
- else {
- glBegin(GL_LINES);
- glEvalCoord2f(0.0, (v_bottom + 1) * t_1);
- glEvalPoint2(1, v_top);
- glEvalCoord2f(0.0, (v_bottom + 1) * t_1);
- glEvalCoord2f(0.0, v_bottom * t_1);
- glEvalCoord2f(0.0, (v_bottom + 1) * t_1);
- glEvalCoord2f(s_1, (v_bottom + 1) * t_1);
- }
- glEnd();
-}
-
-static void
-tesselate_top_left_corner(GLenum display_mode, GLint u_right, GLint u_left,
- GLfloat s_1, GLfloat t_1)
-{
- if (display_mode == GL_FILL) {
- glBegin(GL_TRIANGLE_FAN);
- glEvalPoint2(u_right, 1);
- glEvalCoord2f((u_left + 1) * s_1, t_1);
- glEvalCoord2f((u_left + 1) * s_1, 0.0);
- glEvalCoord2f(u_left * s_1, 0.0);
- }
- else {
- glBegin(GL_LINES);
- glEvalCoord2f((u_left + 1) * s_1, 0.0);
- glEvalPoint2(u_right, 1);
- glEvalCoord2f((u_left + 1) * s_1, 0.0);
- glEvalCoord2f(u_left * s_1, 0.0);
- glEvalCoord2f((u_left + 1) * s_1, 0.0);
- glEvalCoord2f((u_left + 1) * s_1, t_1);
- }
- glEnd();
-}
-
-static void
-tesselate_top_right_corner(GLenum display_mode, GLint u_left, GLint v_bottom,
- GLint u_right, GLint v_top, GLfloat s_1,
- GLfloat t_1)
-{
- if (display_mode == GL_FILL) {
- glBegin(GL_TRIANGLE_FAN);
- glEvalPoint2(u_left, v_bottom);
- glEvalCoord2f((u_right - 1) * s_1, v_top * t_1);
- glEvalCoord2f(u_right * s_1, v_top * t_1);
- glEvalCoord2f(u_right * s_1, (v_top - 1) * t_1);
- }
- else {
- glBegin(GL_LINES);
- glEvalCoord2f(u_right * s_1, v_top * t_1);
- glEvalPoint2(u_left, v_bottom);
- glEvalCoord2f(u_right * s_1, v_top * t_1);
- glEvalCoord2f(u_right * s_1, (v_top - 1) * t_1);
- glEvalCoord2f(u_right * s_1, v_top * t_1);
- glEvalCoord2f((u_right - 1) * s_1, v_top * t_1);
- }
- glEnd();
-}
-
-/* do mesh mapping of Bezier */
-static void
-nurbs_map_bezier(GLenum display_mode, GLint * sfactors, GLint * tfactors,
- GLint s_bezier_cnt, GLint t_bezier_cnt, GLint s, GLint t)
-{
- GLint top, bottom, right, left;
-
-
- if (s == 0) {
- top = *(tfactors + t * 3);
- bottom = *(tfactors + t * 3 + 1);
- }
- else if (s == s_bezier_cnt - 1) {
- top = *(tfactors + t * 3 + 2);
- bottom = *(tfactors + t * 3);
- }
- else {
- top = bottom = *(tfactors + t * 3);
- }
- if (t == 0) {
- left = *(sfactors + s * 3 + 1);
- right = *(sfactors + s * 3);
- }
- else if (t == t_bezier_cnt - 1) {
- left = *(sfactors + s * 3);
- right = *(sfactors + s * 3 + 2);
- }
- else {
- left = right = *(sfactors + s * 3);
- }
-
- if (top > bottom) {
- if (left < right) {
- glMapGrid2f(right, 0.0, 1.0, top, 0.0, 1.0);
- glEvalMesh2(display_mode, 1, right, 1, top);
- tesselate_strip_s(display_mode, 1, right, 1, 1, left, 0,
- (GLfloat) left);
- tesselate_bottom_left_corner(display_mode, (GLfloat) (1.0 / left),
- (GLfloat) (1.0 / bottom));
-/* tesselate_strip_t(display_mode,1,top,1,1,bottom,0,(GLfloat)bottom);*/
- tesselate_strip_t(display_mode, top, 1, 1, bottom, 1, 0,
- (GLfloat) bottom);
- }
- else if (left == right) {
- glMapGrid2f(right, 0.0, 1.0, top, 0.0, 1.0);
- glEvalMesh2(display_mode, 1, right, 0, top);
-/* tesselate_strip_t(display_mode,0,top,1,0,bottom,0,(GLfloat)bottom);*/
- tesselate_strip_t(display_mode, top, 0, 1, bottom, 0, 0,
- (GLfloat) bottom);
- }
- else {
- glMapGrid2f(left, 0.0, 1.0, top, 0.0, 1.0);
- glEvalMesh2(display_mode, 1, left, 0, top - 1);
-/* tesselate_strip_t(display_mode,0,top-1,1,0,bottom-1,0,
- (GLfloat)bottom);*/
- tesselate_strip_t(display_mode, top - 1, 0, 1, bottom - 1, 0, 0,
- (GLfloat) bottom);
- tesselate_bottom_right_corner(display_mode, top - 1, bottom - 1,
- (GLfloat) (1.0 / right),
- (GLfloat) (1.0 / bottom));
-/* tesselate_strip_s(display_mode,1,left,top-1,1,right,right,
- (GLfloat)right);*/
- tesselate_strip_s(display_mode, left, 1, top - 1, right, 1, right,
- (GLfloat) right);
- }
- }
- else if (top == bottom) {
- if (left < right) {
- glMapGrid2f(right, 0.0, 1.0, top, 0.0, 1.0);
- glEvalMesh2(display_mode, 0, right, 1, top);
- tesselate_strip_s(display_mode, 0, right, 1, 0, left, 0,
- (GLfloat) left);
- }
- else if (left == right) {
- glMapGrid2f(right, 0.0, 1.0, top, 0.0, 1.0);
- glEvalMesh2(display_mode, 0, right, 0, top);
- }
- else {
- glMapGrid2f(left, 0.0, 1.0, top, 0.0, 1.0);
- glEvalMesh2(display_mode, 0, left, 0, top - 1);
-/* tesselate_strip_s(display_mode,0,left,top-1,0,right,right,
- (GLfloat)right);*/
- tesselate_strip_s(display_mode, left, 0, top - 1, right, 0, right,
- (GLfloat) right);
- }
- }
- else {
- if (left < right) {
- glMapGrid2f(right, 0.0, 1.0, bottom, 0.0, 1.0);
- glEvalMesh2(display_mode, 0, right - 1, 1, bottom);
- tesselate_strip_s(display_mode, 0, right - 1, 1, 0, left - 1, 0,
- (GLfloat) left);
- tesselate_top_left_corner(display_mode, right - 1, left - 1,
- (GLfloat) (1.0 / left),
- (GLfloat) (1.0 / top));
- tesselate_strip_t(display_mode, 1, bottom, right - 1, 1, top, top,
- (GLfloat) top);
- }
- else if (left == right) {
- glMapGrid2f(right, 0.0, 1.0, bottom, 0.0, 1.0);
- glEvalMesh2(display_mode, 0, right - 1, 0, bottom);
- tesselate_strip_t(display_mode, 0, bottom, right - 1, 0, top, top,
- (GLfloat) top);
- }
- else {
- glMapGrid2f(left, 0.0, 1.0, bottom, 0.0, 1.0);
- glEvalMesh2(display_mode, 0, left - 1, 0, bottom - 1);
- tesselate_strip_t(display_mode, 0, bottom - 1, left - 1, 0, top - 1,
- top, (GLfloat) top);
- tesselate_top_right_corner(display_mode, left - 1, bottom - 1, right,
- top, (GLfloat) (1.0 / right),
- (GLfloat) (1.0 / top));
-/* tesselate_strip_s(display_mode,0,left-1,bottom-1,0,right-1,right,
- (GLfloat)right);*/
- tesselate_strip_s(display_mode, left - 1, 0, bottom - 1, right - 1,
- 0, right, (GLfloat) right);
- }
- }
-}
-
-/* draw NURBS surface in OUTLINE POLYGON mode */
-static void
-draw_polygon_mode(GLenum display_mode, GLUnurbsObj * nobj,
- new_ctrl_type * new_ctrl, GLint * sfactors,
- GLint * tfactors)
-{
- GLsizei offset;
- GLint t_bezier_cnt, s_bezier_cnt;
- GLboolean do_color, do_normal, do_texture;
- GLint i, j;
-
- t_bezier_cnt = new_ctrl->t_bezier_cnt;
- s_bezier_cnt = new_ctrl->s_bezier_cnt;
- glEnable(nobj->surface.geom.type);
- if (new_ctrl->color_ctrl) {
- glEnable(nobj->surface.color.type);
- do_color = GL_TRUE;
- }
- else
- do_color = GL_FALSE;
- if (new_ctrl->normal_ctrl) {
- glEnable(nobj->surface.normal.type);
- do_normal = GL_TRUE;
- }
- else
- do_normal = GL_FALSE;
- if (new_ctrl->texture_ctrl) {
- glEnable(nobj->surface.texture.type);
- do_texture = GL_TRUE;
- }
- else
- do_texture = GL_FALSE;
- for (j = 0; j < s_bezier_cnt; j++) {
- for (i = 0; i < t_bezier_cnt; i++) {
- offset = j * t_bezier_cnt + i;
- if (fine_culling_test_3D(nobj, *(new_ctrl->geom_offsets + offset),
- nobj->surface.geom.sorder,
- nobj->surface.geom.torder,
- new_ctrl->geom_s_stride,
- new_ctrl->geom_t_stride,
- nobj->surface.geom.dim)) continue;
- glMap2f(nobj->surface.geom.type, 0.0, 1.0, new_ctrl->geom_s_stride,
- nobj->surface.geom.sorder, 0.0, 1.0, new_ctrl->geom_t_stride,
- nobj->surface.geom.torder,
- *(new_ctrl->geom_offsets + offset));
- if (do_color) {
- glMap2f(nobj->surface.color.type, 0.0, 1.0,
- new_ctrl->color_s_stride, nobj->surface.color.sorder,
- 0.0, 1.0, new_ctrl->color_t_stride,
- nobj->surface.color.torder,
- *(new_ctrl->color_offsets + offset));
- }
- if (do_normal) {
- glMap2f(nobj->surface.normal.type, 0.0, 1.0,
- new_ctrl->normal_s_stride, nobj->surface.normal.sorder,
- 0.0, 1.0, new_ctrl->normal_t_stride,
- nobj->surface.normal.torder,
- *(new_ctrl->normal_offsets + offset));
- }
- if (do_texture) {
- glMap2f(nobj->surface.texture.type, 0.0, 1.0,
- new_ctrl->texture_s_stride, nobj->surface.texture.sorder,
- 0.0, 1.0, new_ctrl->texture_t_stride,
- nobj->surface.texture.torder,
- *(new_ctrl->texture_offsets + offset));
- }
-/* glMapGrid2f(sfactors[j*3+0],0.0,1.0,tfactors[i*3+0],0.0,1.0);
- glEvalMesh2(display_mode,0,sfactors[j*3+0],0,tfactors[i*3+0]);*/
- nurbs_map_bezier(display_mode, sfactors, tfactors, s_bezier_cnt,
- t_bezier_cnt, j, i);
- }
- }
-}
-
-
-
-/* draw NURBS surface in OUTLINE POLYGON mode */
-#if 0
-static void
-draw_patch_mode(GLenum display_mode, GLUnurbsObj * nobj,
- new_ctrl_type * new_ctrl, GLint * sfactors, GLint * tfactors)
-{
- GLsizei offset;
- GLint t_bezier_cnt, s_bezier_cnt;
- GLboolean do_color, do_normal, do_texture;
- GLint i, j;
-
- t_bezier_cnt = new_ctrl->t_bezier_cnt;
- s_bezier_cnt = new_ctrl->s_bezier_cnt;
- glEnable(nobj->surface.geom.type);
- if (new_ctrl->color_ctrl) {
- glEnable(nobj->surface.color.type);
- do_color = GL_TRUE;
- }
- else
- do_color = GL_FALSE;
- if (new_ctrl->normal_ctrl) {
- glEnable(nobj->surface.normal.type);
- do_normal = GL_TRUE;
- }
- else
- do_normal = GL_FALSE;
- if (new_ctrl->texture_ctrl) {
- glEnable(nobj->surface.texture.type);
- do_texture = GL_TRUE;
- }
- else
- do_texture = GL_FALSE;
- for (j = 0; j < s_bezier_cnt; j++) {
- for (i = 0; i < t_bezier_cnt; i++) {
- offset = j * t_bezier_cnt + i;
- if (fine_culling_test_3D(nobj, *(new_ctrl->geom_offsets + offset),
- nobj->surface.geom.sorder,
- nobj->surface.geom.torder,
- new_ctrl->geom_s_stride,
- new_ctrl->geom_t_stride,
- nobj->surface.geom.dim)) continue;
- glMap2f(nobj->surface.geom.type, 0.0, 1.0, new_ctrl->geom_s_stride,
- nobj->surface.geom.sorder, 0.0, 1.0, new_ctrl->geom_t_stride,
- nobj->surface.geom.torder,
- *(new_ctrl->geom_offsets + offset));
- if (do_color) {
- glMap2f(nobj->surface.color.type, 0.0, 1.0,
- new_ctrl->color_s_stride, nobj->surface.color.sorder,
- 0.0, 1.0, new_ctrl->color_t_stride,
- nobj->surface.color.torder,
- *(new_ctrl->color_offsets + offset));
- }
- if (do_normal) {
- glMap2f(nobj->surface.normal.type, 0.0, 1.0,
- new_ctrl->normal_s_stride, nobj->surface.normal.sorder,
- 0.0, 1.0, new_ctrl->normal_t_stride,
- nobj->surface.normal.torder,
- *(new_ctrl->normal_offsets + offset));
- }
- if (do_texture) {
- glMap2f(nobj->surface.texture.type, 0.0, 1.0,
- new_ctrl->texture_s_stride, nobj->surface.texture.sorder,
- 0.0, 1.0, new_ctrl->texture_t_stride,
- nobj->surface.texture.torder,
- *(new_ctrl->texture_offsets + offset));
- }
- nurbs_map_bezier(display_mode, sfactors, tfactors, s_bezier_cnt,
- t_bezier_cnt, i, j);
-/* glMapGrid2f(sfactors[j],0.0,1.0,tfactors[i],0.0,1.0);
- glEvalMesh2(display_mode,0,sfactors[j],0,tfactors[i]);*/
- }
- }
-}
-#endif
-
-
-
-static void
-init_new_ctrl(new_ctrl_type * p)
-{
- p->geom_ctrl = p->color_ctrl = p->normal_ctrl = p->texture_ctrl = NULL;
- p->geom_offsets = p->color_offsets = p->normal_offsets =
- p->texture_offsets = NULL;
- p->s_bezier_cnt = p->t_bezier_cnt = 0;
-}
-
-
-static GLenum
-augment_new_ctrl(GLUnurbsObj * nobj, new_ctrl_type * p)
-{
- GLsizei offset_size;
- GLint i, j;
-
- p->s_bezier_cnt = (p->geom_s_pt_cnt) / (nobj->surface.geom.sorder);
- p->t_bezier_cnt = (p->geom_t_pt_cnt) / (nobj->surface.geom.torder);
- offset_size = (p->s_bezier_cnt) * (p->t_bezier_cnt);
- p->geom_t_stride = nobj->surface.geom.dim;
- p->geom_s_stride = (p->geom_t_pt_cnt) * (nobj->surface.geom.dim);
- p->color_t_stride = nobj->surface.color.dim;
- p->color_s_stride = (p->color_t_pt_cnt) * (nobj->surface.color.dim);
- p->normal_t_stride = nobj->surface.normal.dim;
- p->normal_s_stride = (p->normal_t_pt_cnt) * (nobj->surface.normal.dim);
- p->texture_t_stride = nobj->surface.texture.dim;
- p->texture_s_stride = (p->texture_t_pt_cnt) * (nobj->surface.texture.dim);
- if (
- (p->geom_offsets =
- (GLfloat **) malloc(sizeof(GLfloat *) * offset_size)) == NULL) {
- call_user_error(nobj, GLU_OUT_OF_MEMORY);
- return GLU_ERROR;
- }
- if (p->color_ctrl)
- if (
- (p->color_offsets =
- (GLfloat **) malloc(sizeof(GLfloat *) * offset_size)) == NULL) {
- free_new_ctrl(p);
- call_user_error(nobj, GLU_OUT_OF_MEMORY);
- return GLU_ERROR;
- }
- if (p->normal_ctrl)
- if (
- (p->normal_offsets =
- (GLfloat **) malloc(sizeof(GLfloat *) * offset_size)) == NULL) {
- free_new_ctrl(p);
- call_user_error(nobj, GLU_OUT_OF_MEMORY);
- return GLU_ERROR;
- }
- if (p->texture_ctrl)
- if (
- (p->texture_offsets =
- (GLfloat **) malloc(sizeof(GLfloat *) * offset_size)) == NULL) {
- free_new_ctrl(p);
- call_user_error(nobj, GLU_OUT_OF_MEMORY);
- return GLU_ERROR;
- }
- for (i = 0; i < p->s_bezier_cnt; i++)
- for (j = 0; j < p->t_bezier_cnt; j++)
- *(p->geom_offsets + i * (p->t_bezier_cnt) + j) =
- p->geom_ctrl + i * (nobj->surface.geom.sorder) *
- (nobj->surface.geom.dim) * (p->geom_t_pt_cnt) +
- j * (nobj->surface.geom.dim) * (nobj->surface.geom.torder);
- if (p->color_ctrl)
- for (i = 0; i < p->s_bezier_cnt; i++)
- for (j = 0; j < p->t_bezier_cnt; j++)
- *(p->color_offsets + i * (p->t_bezier_cnt) + j) =
- p->color_ctrl + i * (nobj->surface.color.sorder) *
- (nobj->surface.color.dim) * (p->color_t_pt_cnt) +
- j * (nobj->surface.color.dim) * (nobj->surface.color.torder);
- if (p->normal_ctrl)
- for (i = 0; i < p->s_bezier_cnt; i++)
- for (j = 0; j < p->t_bezier_cnt; j++)
- *(p->normal_offsets + i * (p->t_bezier_cnt) + j) =
- p->normal_ctrl + i * (nobj->surface.normal.sorder) *
- (nobj->surface.normal.dim) * (p->normal_t_pt_cnt) +
- j * (nobj->surface.normal.dim) * (nobj->surface.normal.torder);
- if (p->texture_ctrl)
- for (i = 0; i < p->s_bezier_cnt; i++)
- for (j = 0; j < p->t_bezier_cnt; j++)
- *(p->texture_offsets + i * (p->t_bezier_cnt) + j) =
- p->texture_ctrl + i * (nobj->surface.texture.sorder) *
- (nobj->surface.texture.dim) * (p->texture_t_pt_cnt) +
- j * (nobj->surface.texture.dim) *
- (nobj->surface.texture.torder);
- return GLU_NO_ERROR;
-}
-
-/* main NURBS surface procedure */
-void
-do_nurbs_surface(GLUnurbsObj * nobj)
-{
- GLint *sfactors, *tfactors;
- new_ctrl_type new_ctrl;
-
- /* test user supplied data */
- if (test_nurbs_surfaces(nobj) != GLU_NO_ERROR)
- return;
-
- init_new_ctrl(&new_ctrl);
-
- if (convert_surfs(nobj, &new_ctrl) != GLU_NO_ERROR)
- return;
- if (augment_new_ctrl(nobj, &new_ctrl) != GLU_NO_ERROR)
- return;
- switch (nobj->sampling_method) {
- case GLU_PATH_LENGTH:
- if (glu_do_sampling_3D(nobj, &new_ctrl, &sfactors, &tfactors) !=
- GLU_NO_ERROR) {
- free_new_ctrl(&new_ctrl);
- return;
- }
- break;
- case GLU_DOMAIN_DISTANCE:
- if (glu_do_sampling_uv(nobj, &new_ctrl, &sfactors, &tfactors) !=
- GLU_NO_ERROR) {
- free_new_ctrl(&new_ctrl);
- return;
- }
- break;
- case GLU_PARAMETRIC_ERROR:
- if (glu_do_sampling_param_3D(nobj, &new_ctrl, &sfactors, &tfactors) !=
- GLU_NO_ERROR) {
- free_new_ctrl(&new_ctrl);
- return;
- }
- break;
- default:
- abort();
- }
- glFrontFace(GL_CW);
- switch (nobj->display_mode) {
- case GLU_FILL:
-/* if(polygon_trimming(nobj,&new_ctrl,sfactors,tfactors)==GLU_NO_ERROR)*/
- draw_polygon_mode(GL_FILL, nobj, &new_ctrl, sfactors, tfactors);
- break;
- case GLU_OUTLINE_POLYGON:
- /* TODO - missing trimming handeling */
-/* just for now - no OUTLINE_PATCH mode
- draw_patch_mode(GL_LINE,nobj,&new_ctrl,sfactors,tfactors);
- break; */
- case GLU_OUTLINE_PATCH:
-/* if(polygon_trimming(nobj,&new_ctrl,sfactors,tfactors)==GLU_NO_ERROR)*/
- draw_polygon_mode(GL_LINE, nobj, &new_ctrl, sfactors, tfactors);
- break;
- default:
- abort(); /* TODO: is this OK? */
- }
- free(sfactors);
- free(tfactors);
- free_new_ctrl(&new_ctrl);
-}
+++ /dev/null
-
-/*
- * Mesa 3-D graphics library
- * Version: 3.3
- * Copyright (C) 1995-2000 Brian Paul
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-
-/*
- * NURBS implementation written by Bogdan Sikorski (bogdan@cira.it)
- * See README2 for more info.
- */
-
-
-#ifdef PC_HEADER
-#include "all.h"
-#else
-#include <math.h>
-#include <stdlib.h>
-#include "gluP.h"
-#include "nurbs.h"
-#endif
-
-
-GLenum test_knot(GLint nknots, GLfloat * knot, GLint order)
-{
- GLsizei i;
- GLint knot_mult;
- GLfloat tmp_knot;
-
- tmp_knot = knot[0];
- knot_mult = 1;
- for (i = 1; i < nknots; i++) {
- if (knot[i] < tmp_knot)
- return GLU_NURBS_ERROR4;
- if (fabs(tmp_knot - knot[i]) > EPSILON) {
- if (knot_mult > order)
- return GLU_NURBS_ERROR5;
- knot_mult = 1;
- tmp_knot = knot[i];
- }
- else
- ++knot_mult;
- }
- return GLU_NO_ERROR;
-}
-
-static int
-/* qsort function */
-#if defined(WIN32) && !defined(OPENSTEP)
- __cdecl
-#endif
-knot_sort(const void *a, const void *b)
-{
- GLfloat x, y;
-
- x = *((GLfloat *) a);
- y = *((GLfloat *) b);
- if (fabs(x - y) < EPSILON)
- return 0;
- if (x > y)
- return 1;
- return -1;
-}
-
-/* insert into dest knot all values within the valid range from src knot */
-/* that do not appear in dest */
-void
-collect_unified_knot(knot_str_type * dest, knot_str_type * src,
- GLfloat maximal_min_knot, GLfloat minimal_max_knot)
-{
- GLfloat *src_knot, *dest_knot;
- GLint src_t_min, src_t_max, dest_t_min, dest_t_max;
- GLint src_nknots, dest_nknots;
- GLint i, j, k, new_cnt;
- GLboolean not_found_flag;
-
- src_knot = src->unified_knot;
- dest_knot = dest->unified_knot;
- src_t_min = src->t_min;
- src_t_max = src->t_max;
- dest_t_min = dest->t_min;
- dest_t_max = dest->t_max;
- src_nknots = src->unified_nknots;
- dest_nknots = dest->unified_nknots;
-
- k = new_cnt = dest_nknots;
- for (i = src_t_min; i <= src_t_max; i++)
- if (src_knot[i] - maximal_min_knot > -EPSILON &&
- src_knot[i] - minimal_max_knot < EPSILON) {
- not_found_flag = GL_TRUE;
- for (j = dest_t_min; j <= dest_t_max; j++)
- if (fabs(dest_knot[j] - src_knot[i]) < EPSILON) {
- not_found_flag = GL_FALSE;
- break;
- }
- if (not_found_flag) {
- /* knot from src is not in dest - add this knot to dest */
- dest_knot[k++] = src_knot[i];
- ++new_cnt;
- ++(dest->t_max); /* the valid range widens */
- ++(dest->delta_nknots); /* increment the extra knot value counter */
- }
- }
- dest->unified_nknots = new_cnt;
- qsort((void *) dest_knot, (size_t) new_cnt, (size_t) sizeof(GLfloat),
- &knot_sort);
-}
-
-/* basing on the new common knot range for all attributes set */
-/* t_min and t_max values for each knot - they will be used later on */
-/* by explode_knot() and calc_new_ctrl_pts */
-static void
-set_new_t_min_t_max(knot_str_type * geom_knot, knot_str_type * color_knot,
- knot_str_type * normal_knot, knot_str_type * texture_knot,
- GLfloat maximal_min_knot, GLfloat minimal_max_knot)
-{
- GLuint t_min = 0, t_max = 0, cnt = 0;
-
- if (minimal_max_knot - maximal_min_knot < EPSILON) {
- /* knot common range empty */
- geom_knot->t_min = geom_knot->t_max = 0;
- color_knot->t_min = color_knot->t_max = 0;
- normal_knot->t_min = normal_knot->t_max = 0;
- texture_knot->t_min = texture_knot->t_max = 0;
- }
- else {
- if (geom_knot->unified_knot != NULL) {
- cnt = geom_knot->unified_nknots;
- for (t_min = 0; t_min < cnt; t_min++)
- if (fabs((geom_knot->unified_knot)[t_min] - maximal_min_knot) <
- EPSILON) break;
- for (t_max = cnt - 1; t_max; t_max--)
- if (fabs((geom_knot->unified_knot)[t_max] - minimal_max_knot) <
- EPSILON) break;
- }
- else if (geom_knot->nknots) {
- cnt = geom_knot->nknots;
- for (t_min = 0; t_min < cnt; t_min++)
- if (fabs((geom_knot->knot)[t_min] - maximal_min_knot) < EPSILON)
- break;
- for (t_max = cnt - 1; t_max; t_max--)
- if (fabs((geom_knot->knot)[t_max] - minimal_max_knot) < EPSILON)
- break;
- }
- geom_knot->t_min = t_min;
- geom_knot->t_max = t_max;
- if (color_knot->unified_knot != NULL) {
- cnt = color_knot->unified_nknots;
- for (t_min = 0; t_min < cnt; t_min++)
- if (fabs((color_knot->unified_knot)[t_min] - maximal_min_knot) <
- EPSILON) break;
- for (t_max = cnt - 1; t_max; t_max--)
- if (fabs((color_knot->unified_knot)[t_max] - minimal_max_knot) <
- EPSILON) break;
- color_knot->t_min = t_min;
- color_knot->t_max = t_max;
- }
- if (normal_knot->unified_knot != NULL) {
- cnt = normal_knot->unified_nknots;
- for (t_min = 0; t_min < cnt; t_min++)
- if (fabs((normal_knot->unified_knot)[t_min] - maximal_min_knot) <
- EPSILON) break;
- for (t_max = cnt - 1; t_max; t_max--)
- if (fabs((normal_knot->unified_knot)[t_max] - minimal_max_knot) <
- EPSILON) break;
- normal_knot->t_min = t_min;
- normal_knot->t_max = t_max;
- }
- if (texture_knot->unified_knot != NULL) {
- cnt = texture_knot->unified_nknots;
- for (t_min = 0; t_min < cnt; t_min++)
- if (fabs((texture_knot->unified_knot)[t_min] - maximal_min_knot)
- < EPSILON)
- break;
- for (t_max = cnt - 1; t_max; t_max--)
- if (fabs((texture_knot->unified_knot)[t_max] - minimal_max_knot)
- < EPSILON)
- break;
- texture_knot->t_min = t_min;
- texture_knot->t_max = t_max;
- }
- }
-}
-
-/* modify all knot valid ranges in such a way that all have the same */
-/* range, common to all knots */
-/* do this by knot insertion */
-GLenum
-select_knot_working_range(GLUnurbsObj * nobj, knot_str_type * geom_knot,
- knot_str_type * color_knot,
- knot_str_type * normal_knot,
- knot_str_type * texture_knot)
-{
- GLint max_nknots;
- GLfloat maximal_min_knot, minimal_max_knot;
- GLint i;
-
- /* find the maximum modified knot length */
- max_nknots = geom_knot->nknots;
- if (color_knot->unified_knot)
- max_nknots += color_knot->nknots;
- if (normal_knot->unified_knot)
- max_nknots += normal_knot->nknots;
- if (texture_knot->unified_knot)
- max_nknots += texture_knot->nknots;
- maximal_min_knot = (geom_knot->knot)[geom_knot->t_min];
- minimal_max_knot = (geom_knot->knot)[geom_knot->t_max];
- /* any attirb data ? */
- if (max_nknots != geom_knot->nknots) {
- /* allocate space for the unified knots */
- if ((geom_knot->unified_knot =
- (GLfloat *) malloc(sizeof(GLfloat) * max_nknots)) == NULL) {
- call_user_error(nobj, GLU_OUT_OF_MEMORY);
- return GLU_ERROR;
- }
- /* copy the original knot to the unified one */
- geom_knot->unified_nknots = geom_knot->nknots;
- for (i = 0; i < geom_knot->nknots; i++)
- (geom_knot->unified_knot)[i] = (geom_knot->knot)[i];
- if (color_knot->unified_knot) {
- if ((color_knot->knot)[color_knot->t_min] - maximal_min_knot >
- EPSILON)
- maximal_min_knot = (color_knot->knot)[color_knot->t_min];
- if (minimal_max_knot - (color_knot->knot)[color_knot->t_max] >
- EPSILON)
- minimal_max_knot = (color_knot->knot)[color_knot->t_max];
- if ((color_knot->unified_knot =
- (GLfloat *) malloc(sizeof(GLfloat) * max_nknots)) == NULL) {
- free(geom_knot->unified_knot);
- call_user_error(nobj, GLU_OUT_OF_MEMORY);
- return GLU_ERROR;
- }
- /* copy the original knot to the unified one */
- color_knot->unified_nknots = color_knot->nknots;
- for (i = 0; i < color_knot->nknots; i++)
- (color_knot->unified_knot)[i] = (color_knot->knot)[i];
- }
- if (normal_knot->unified_knot) {
- if ((normal_knot->knot)[normal_knot->t_min] - maximal_min_knot >
- EPSILON)
- maximal_min_knot = (normal_knot->knot)[normal_knot->t_min];
- if (minimal_max_knot - (normal_knot->knot)[normal_knot->t_max] >
- EPSILON)
- minimal_max_knot = (normal_knot->knot)[normal_knot->t_max];
- if ((normal_knot->unified_knot =
- (GLfloat *) malloc(sizeof(GLfloat) * max_nknots)) == NULL) {
- free(geom_knot->unified_knot);
- free(color_knot->unified_knot);
- call_user_error(nobj, GLU_OUT_OF_MEMORY);
- return GLU_ERROR;
- }
- /* copy the original knot to the unified one */
- normal_knot->unified_nknots = normal_knot->nknots;
- for (i = 0; i < normal_knot->nknots; i++)
- (normal_knot->unified_knot)[i] = (normal_knot->knot)[i];
- }
- if (texture_knot->unified_knot) {
- if ((texture_knot->knot)[texture_knot->t_min] - maximal_min_knot >
- EPSILON)
- maximal_min_knot = (texture_knot->knot)[texture_knot->t_min];
- if (minimal_max_knot - (texture_knot->knot)[texture_knot->t_max] >
- EPSILON)
- minimal_max_knot = (texture_knot->knot)[texture_knot->t_max];
- if ((texture_knot->unified_knot =
- (GLfloat *) malloc(sizeof(GLfloat) * max_nknots)) == NULL) {
- free(geom_knot->unified_knot);
- free(color_knot->unified_knot);
- free(normal_knot->unified_knot);
- call_user_error(nobj, GLU_OUT_OF_MEMORY);
- return GLU_ERROR;
- }
- /* copy the original knot to the unified one */
- texture_knot->unified_nknots = texture_knot->nknots;
- for (i = 0; i < texture_knot->nknots; i++)
- (texture_knot->unified_knot)[i] = (texture_knot->knot)[i];
- }
- /* work on the geometry knot with all additional knot values */
- /* appearing in attirbutive knots */
- if (minimal_max_knot - maximal_min_knot < EPSILON) {
- /* empty working range */
- geom_knot->unified_nknots = 0;
- color_knot->unified_nknots = 0;
- normal_knot->unified_nknots = 0;
- texture_knot->unified_nknots = 0;
- }
- else {
- if (color_knot->unified_knot)
- collect_unified_knot(geom_knot, color_knot, maximal_min_knot,
- minimal_max_knot);
- if (normal_knot->unified_knot)
- collect_unified_knot(geom_knot, normal_knot, maximal_min_knot,
- minimal_max_knot);
- if (texture_knot->unified_knot)
- collect_unified_knot(geom_knot, texture_knot, maximal_min_knot,
- minimal_max_knot);
- /* since we have now built the "unified" geometry knot */
- /* add same knot values to all attributive knots */
- if (color_knot->unified_knot)
- collect_unified_knot(color_knot, geom_knot, maximal_min_knot,
- minimal_max_knot);
- if (normal_knot->unified_knot)
- collect_unified_knot(normal_knot, geom_knot, maximal_min_knot,
- minimal_max_knot);
- if (texture_knot->unified_knot)
- collect_unified_knot(texture_knot, geom_knot, maximal_min_knot,
- minimal_max_knot);
- }
- }
- set_new_t_min_t_max(geom_knot, color_knot, normal_knot, texture_knot,
- maximal_min_knot, minimal_max_knot);
- return GLU_NO_ERROR;
-}
-
-void
-free_unified_knots(knot_str_type * geom_knot, knot_str_type * color_knot,
- knot_str_type * normal_knot, knot_str_type * texture_knot)
-{
- if (geom_knot->unified_knot)
- free(geom_knot->unified_knot);
- if (color_knot->unified_knot)
- free(color_knot->unified_knot);
- if (normal_knot->unified_knot)
- free(normal_knot->unified_knot);
- if (texture_knot->unified_knot)
- free(texture_knot->unified_knot);
-}
-
-GLenum explode_knot(knot_str_type * the_knot)
-{
- GLfloat *knot, *new_knot;
- GLint nknots, n_new_knots = 0;
- GLint t_min, t_max;
- GLint ord;
- GLsizei i, j, k;
- GLfloat tmp_float;
-
- if (the_knot->unified_knot) {
- knot = the_knot->unified_knot;
- nknots = the_knot->unified_nknots;
- }
- else {
- knot = the_knot->knot;
- nknots = the_knot->nknots;
- }
- ord = the_knot->order;
- t_min = the_knot->t_min;
- t_max = the_knot->t_max;
-
- for (i = t_min; i <= t_max;) {
- tmp_float = knot[i];
- for (j = 0; j < ord && (i + j) <= t_max; j++)
- if (fabs(tmp_float - knot[i + j]) > EPSILON)
- break;
- n_new_knots += ord - j;
- i += j;
- }
- /* alloc space for new_knot */
- if (
- (new_knot =
- (GLfloat *) malloc(sizeof(GLfloat) * (nknots + n_new_knots + 1))) == NULL) {
- return GLU_OUT_OF_MEMORY;
- }
- /* fill in new knot */
- for (j = 0; j < t_min; j++)
- new_knot[j] = knot[j];
- for (i = j; i <= t_max; i++) {
- tmp_float = knot[i];
- for (k = 0; k < ord; k++) {
- new_knot[j++] = knot[i];
- if (tmp_float == knot[i + 1])
- i++;
- }
- }
- for (i = t_max + 1; i < (int) nknots; i++)
- new_knot[j++] = knot[i];
- /* fill in the knot structure */
- the_knot->new_knot = new_knot;
- the_knot->delta_nknots += n_new_knots;
- the_knot->t_max += n_new_knots;
- return GLU_NO_ERROR;
-}
-
-GLenum calc_alphas(knot_str_type * the_knot)
-{
- GLfloat tmp_float;
- int i, j, k, m, n;
- int order;
- GLfloat *alpha, *alpha_new, *tmp_alpha;
- GLfloat denom;
- GLfloat *knot, *new_knot;
-
-
- knot = the_knot->knot;
- order = the_knot->order;
- new_knot = the_knot->new_knot;
- n = the_knot->nknots - the_knot->order;
- m = n + the_knot->delta_nknots;
- if ((alpha = (GLfloat *) malloc(sizeof(GLfloat) * n * m)) == NULL) {
- return GLU_OUT_OF_MEMORY;
- }
- if ((alpha_new = (GLfloat *) malloc(sizeof(GLfloat) * n * m)) == NULL) {
- free(alpha);
- return GLU_OUT_OF_MEMORY;
- }
- for (j = 0; j < m; j++) {
- for (i = 0; i < n; i++) {
- if ((knot[i] <= new_knot[j]) && (new_knot[j] < knot[i + 1]))
- tmp_float = 1.0;
- else
- tmp_float = 0.0;
- alpha[i + j * n] = tmp_float;
- }
- }
- for (k = 1; k < order; k++) {
- for (j = 0; j < m; j++)
- for (i = 0; i < n; i++) {
- denom = knot[i + k] - knot[i];
- if (fabs(denom) < EPSILON)
- tmp_float = 0.0;
- else
- tmp_float = (new_knot[j + k] - knot[i]) / denom *
- alpha[i + j * n];
- denom = knot[i + k + 1] - knot[i + 1];
- if (fabs(denom) > EPSILON)
- tmp_float += (knot[i + k + 1] - new_knot[j + k]) / denom *
- alpha[(i + 1) + j * n];
- alpha_new[i + j * n] = tmp_float;
- }
- tmp_alpha = alpha_new;
- alpha_new = alpha;
- alpha = tmp_alpha;
- }
- the_knot->alpha = alpha;
- free(alpha_new);
- return GLU_NO_ERROR;
-}
-
-GLenum
-calc_new_ctrl_pts(GLfloat * ctrl, GLint stride, knot_str_type * the_knot,
- GLint dim, GLfloat ** new_ctrl, GLint * ncontrol)
-{
- GLsizei i, j, k, l, m, n;
- GLsizei index1, index2;
- GLfloat *alpha;
- GLfloat *new_knot;
-
- new_knot = the_knot->new_knot;
- n = the_knot->nknots - the_knot->order;
- alpha = the_knot->alpha;
-
- m = the_knot->t_max + 1 - the_knot->t_min - the_knot->order;
- k = the_knot->t_min;
- /* allocate space for new control points */
- if ((*new_ctrl = (GLfloat *) malloc(sizeof(GLfloat) * dim * m)) == NULL) {
- return GLU_OUT_OF_MEMORY;
- }
- for (j = 0; j < m; j++) {
- for (l = 0; l < dim; l++)
- (*new_ctrl)[j * dim + l] = 0.0;
- for (i = 0; i < n; i++) {
- index1 = i + (j + k) * n;
- index2 = i * stride;
- for (l = 0; l < dim; l++)
- (*new_ctrl)[j * dim + l] += alpha[index1] * ctrl[index2 + l];
- }
- }
- *ncontrol = (GLint) m;
- return GLU_NO_ERROR;
-}
-
-static GLint
-calc_factor(GLfloat * pts, GLint order, GLint indx, GLint stride,
- GLfloat tolerance, GLint dim)
-{
- GLdouble model[16], proj[16];
- GLint viewport[4];
- GLdouble x, y, z, w, winx1, winy1, winz, winx2, winy2;
- GLint i;
- GLdouble len, dx, dy;
-
- glGetDoublev(GL_MODELVIEW_MATRIX, model);
- glGetDoublev(GL_PROJECTION_MATRIX, proj);
- glGetIntegerv(GL_VIEWPORT, viewport);
- if (dim == 4) {
- w = (GLdouble) pts[indx + 3];
- x = (GLdouble) pts[indx] / w;
- y = (GLdouble) pts[indx + 1] / w;
- z = (GLdouble) pts[indx + 2] / w;
- gluProject(x, y, z, model, proj, viewport, &winx1, &winy1, &winz);
- len = 0.0;
- for (i = 1; i < order; i++) {
- w = (GLdouble) pts[indx + i * stride + 3];
- x = (GLdouble) pts[indx + i * stride] / w;
- y = (GLdouble) pts[indx + i * stride + 1] / w;
- z = (GLdouble) pts[indx + i * stride + 2] / w;
- if (gluProject
- (x, y, z, model, proj, viewport, &winx2, &winy2, &winz)) {
- dx = winx2 - winx1;
- dy = winy2 - winy1;
- len += sqrt(dx * dx + dy * dy);
- }
- winx1 = winx2;
- winy1 = winy2;
- }
- }
- else {
- x = (GLdouble) pts[indx];
- y = (GLdouble) pts[indx + 1];
- if (dim == 2)
- z = 0.0;
- else
- z = (GLdouble) pts[indx + 2];
- gluProject(x, y, z, model, proj, viewport, &winx1, &winy1, &winz);
- len = 0.0;
- for (i = 1; i < order; i++) {
- x = (GLdouble) pts[indx + i * stride];
- y = (GLdouble) pts[indx + i * stride + 1];
- if (dim == 2)
- z = 0.0;
- else
- z = (GLdouble) pts[indx + i * stride + 2];
- if (gluProject
- (x, y, z, model, proj, viewport, &winx2, &winy2, &winz)) {
- dx = winx2 - winx1;
- dy = winy2 - winy1;
- len += sqrt(dx * dx + dy * dy);
- }
- winx1 = winx2;
- winy1 = winy2;
- }
- }
- len /= tolerance;
- return ((GLint) len + 1);
-}
-
-/* we can't use the Mesa evaluators - no way to get the point coords */
-/* so we use our own Bezier point calculus routines */
-/* because I'm lazy, I reuse the ones from eval.c */
-
-static void
-bezier_curve(GLfloat * cp, GLfloat * out, GLfloat t,
- GLuint dim, GLuint order, GLint offset)
-{
- GLfloat s, powert;
- GLuint i, k, bincoeff;
-
- if (order >= 2) {
- bincoeff = order - 1;
- s = 1.0 - t;
-
- for (k = 0; k < dim; k++)
- out[k] = s * cp[k] + bincoeff * t * cp[offset + k];
-
- for (i = 2, cp += 2 * offset, powert = t * t; i < order;
- i++, powert *= t, cp += offset) {
- bincoeff *= order - i;
- bincoeff /= i;
-
- for (k = 0; k < dim; k++)
- out[k] = s * out[k] + bincoeff * powert * cp[k];
- }
- }
- else { /* order=1 -> constant curve */
-
- for (k = 0; k < dim; k++)
- out[k] = cp[k];
- }
-}
-
-static GLint
-calc_parametric_factor(GLfloat * pts, GLint order, GLint indx, GLint stride,
- GLfloat tolerance, GLint dim)
-{
- GLdouble model[16], proj[16];
- GLint viewport[4];
- GLdouble x, y, z, w, x1, y1, z1, x2, y2, z2, x3, y3, z3;
- GLint i;
- GLint P;
- GLfloat bez_pt[4];
- GLdouble len = 0.0, tmp, z_med;
-
- P = 2 * (order + 2);
- glGetDoublev(GL_MODELVIEW_MATRIX, model);
- glGetDoublev(GL_PROJECTION_MATRIX, proj);
- glGetIntegerv(GL_VIEWPORT, viewport);
- z_med = (viewport[2] + viewport[3]) * 0.5;
- switch (dim) {
- case 4:
- for (i = 1; i < P; i++) {
- bezier_curve(pts + indx, bez_pt, (GLfloat) i / (GLfloat) P, 4,
- order, stride);
- w = (GLdouble) bez_pt[3];
- x = (GLdouble) bez_pt[0] / w;
- y = (GLdouble) bez_pt[1] / w;
- z = (GLdouble) bez_pt[2] / w;
- gluProject(x, y, z, model, proj, viewport, &x3, &y3, &z3);
- z3 *= z_med;
- bezier_curve(pts + indx, bez_pt, (GLfloat) (i - 1) / (GLfloat) P, 4,
- order, stride);
- w = (GLdouble) bez_pt[3];
- x = (GLdouble) bez_pt[0] / w;
- y = (GLdouble) bez_pt[1] / w;
- z = (GLdouble) bez_pt[2] / w;
- gluProject(x, y, z, model, proj, viewport, &x1, &y1, &z1);
- z1 *= z_med;
- bezier_curve(pts + indx, bez_pt, (GLfloat) (i + 1) / (GLfloat) P, 4,
- order, stride);
- w = (GLdouble) bez_pt[3];
- x = (GLdouble) bez_pt[0] / w;
- y = (GLdouble) bez_pt[1] / w;
- z = (GLdouble) bez_pt[2] / w;
- gluProject(x, y, z, model, proj, viewport, &x2, &y2, &z2);
- z2 *= z_med;
- /* calc distance between point (x3,y3,z3) and line segment */
- /* <x1,y1,z1><x2,y2,z2> */
- x = x2 - x1;
- y = y2 - y1;
- z = z2 - z1;
- tmp = sqrt(x * x + y * y + z * z);
- x /= tmp;
- y /= tmp;
- z /= tmp;
- tmp = x3 * x + y3 * y + z3 * z - x1 * x - y1 * y - z1 * z;
- x = x1 + x * tmp - x3;
- y = y1 + y * tmp - y3;
- z = z1 + z * tmp - z3;
- tmp = sqrt(x * x + y * y + z * z);
- if (tmp > len)
- len = tmp;
- }
- break;
- case 3:
- for (i = 1; i < P; i++) {
- bezier_curve(pts + indx, bez_pt, (GLfloat) i / (GLfloat) P, 3,
- order, stride);
- x = (GLdouble) bez_pt[0];
- y = (GLdouble) bez_pt[1];
- z = (GLdouble) bez_pt[2];
- gluProject(x, y, z, model, proj, viewport, &x3, &y3, &z3);
- z3 *= z_med;
- bezier_curve(pts + indx, bez_pt, (GLfloat) (i - 1) / (GLfloat) P, 3,
- order, stride);
- x = (GLdouble) bez_pt[0];
- y = (GLdouble) bez_pt[1];
- z = (GLdouble) bez_pt[2];
- gluProject(x, y, z, model, proj, viewport, &x1, &y1, &z1);
- z1 *= z_med;
- bezier_curve(pts + indx, bez_pt, (GLfloat) (i + 1) / (GLfloat) P, 3,
- order, stride);
- x = (GLdouble) bez_pt[0];
- y = (GLdouble) bez_pt[1];
- z = (GLdouble) bez_pt[2];
- gluProject(x, y, z, model, proj, viewport, &x2, &y2, &z2);
- z2 *= z_med;
- /* calc distance between point (x3,y3,z3) and line segment */
- /* <x1,y1,z1><x2,y2,z2> */
- x = x2 - x1;
- y = y2 - y1;
- z = z2 - z1;
- tmp = sqrt(x * x + y * y + z * z);
- x /= tmp;
- y /= tmp;
- z /= tmp;
- tmp = x3 * x + y3 * y + z3 * z - x1 * x - y1 * y - z1 * z;
- x = x1 + x * tmp - x3;
- y = y1 + y * tmp - y3;
- z = z1 + z * tmp - z3;
- tmp = sqrt(x * x + y * y + z * z);
- if (tmp > len)
- len = tmp;
- }
- break;
- case 2:
- for (i = 1; i < P; i++) {
- bezier_curve(pts + indx, bez_pt, (GLfloat) i / (GLfloat) P, 2,
- order, stride);
- x = (GLdouble) bez_pt[0];
- y = (GLdouble) bez_pt[1];
- z = 0.0;
- gluProject(x, y, z, model, proj, viewport, &x3, &y3, &z3);
- z3 *= z_med;
- bezier_curve(pts + indx, bez_pt, (GLfloat) (i - 1) / (GLfloat) P, 2,
- order, stride);
- x = (GLdouble) bez_pt[0];
- y = (GLdouble) bez_pt[1];
- z = 0.0;
- gluProject(x, y, z, model, proj, viewport, &x1, &y1, &z1);
- z1 *= z_med;
- bezier_curve(pts + indx, bez_pt, (GLfloat) (i + 1) / (GLfloat) P, 2,
- order, stride);
- x = (GLdouble) bez_pt[0];
- y = (GLdouble) bez_pt[1];
- z = 0.0;
- gluProject(x, y, z, model, proj, viewport, &x2, &y2, &z2);
- z2 *= z_med;
- /* calc distance between point (x3,y3,z3) and line segment */
- /* <x1,y1,z1><x2,y2,z2> */
- x = x2 - x1;
- y = y2 - y1;
- z = z2 - z1;
- tmp = sqrt(x * x + y * y + z * z);
- x /= tmp;
- y /= tmp;
- z /= tmp;
- tmp = x3 * x + y3 * y + z3 * z - x1 * x - y1 * y - z1 * z;
- x = x1 + x * tmp - x3;
- y = y1 + y * tmp - y3;
- z = z1 + z * tmp - z3;
- tmp = sqrt(x * x + y * y + z * z);
- if (tmp > len)
- len = tmp;
- }
- break;
-
- }
- if (len < tolerance)
- return (order);
- else
- return (GLint) (sqrt(len / tolerance) * (order + 2) + 1);
-}
-
-static GLenum
-calc_sampling_3D(new_ctrl_type * new_ctrl, GLfloat tolerance, GLint dim,
- GLint uorder, GLint vorder, GLint ** ufactors,
- GLint ** vfactors)
-{
- GLfloat *ctrl;
- GLint tmp_factor1, tmp_factor2;
- GLint ufactor_cnt, vfactor_cnt;
- GLint offset1, offset2, offset3;
- GLint i, j;
-
- ufactor_cnt = new_ctrl->s_bezier_cnt;
- vfactor_cnt = new_ctrl->t_bezier_cnt;
- if ((*ufactors = (GLint *) malloc(sizeof(GLint) * ufactor_cnt * 3))
- == NULL) {
- return GLU_OUT_OF_MEMORY;
- }
- if ((*vfactors = (GLint *) malloc(sizeof(GLint) * vfactor_cnt * 3))
- == NULL) {
- free(*ufactors);
- return GLU_OUT_OF_MEMORY;
- }
- ctrl = new_ctrl->geom_ctrl;
- offset1 = new_ctrl->geom_t_stride * vorder;
- offset2 = new_ctrl->geom_s_stride * uorder;
- for (j = 0; j < vfactor_cnt; j++) {
- *(*vfactors + j * 3 + 1) = tmp_factor1 = calc_factor(ctrl, vorder,
- j * offset1, dim,
- tolerance, dim);
- /* loop ufactor_cnt-1 times */
- for (i = 1; i < ufactor_cnt; i++) {
- tmp_factor2 = calc_factor(ctrl, vorder,
- j * offset1 + i * offset2, dim, tolerance,
- dim);
- if (tmp_factor2 > tmp_factor1)
- tmp_factor1 = tmp_factor2;
- }
- /* last time for the opposite edge */
- *(*vfactors + j * 3 + 2) = tmp_factor2 = calc_factor(ctrl, vorder,
- j * offset1 +
- i * offset2 -
- new_ctrl->
- geom_s_stride, dim,
- tolerance, dim);
- if (tmp_factor2 > tmp_factor1)
- *(*vfactors + j * 3) = tmp_factor2;
- else
- *(*vfactors + j * 3) = tmp_factor1;
- }
- offset3 = new_ctrl->geom_s_stride;
- offset2 = new_ctrl->geom_s_stride * uorder;
- for (j = 0; j < ufactor_cnt; j++) {
- *(*ufactors + j * 3 + 1) = tmp_factor1 = calc_factor(ctrl, uorder,
- j * offset2,
- offset3, tolerance,
- dim);
- /* loop vfactor_cnt-1 times */
- for (i = 1; i < vfactor_cnt; i++) {
- tmp_factor2 = calc_factor(ctrl, uorder,
- j * offset2 + i * offset1, offset3,
- tolerance, dim);
- if (tmp_factor2 > tmp_factor1)
- tmp_factor1 = tmp_factor2;
- }
- /* last time for the opposite edge */
- *(*ufactors + j * 3 + 2) = tmp_factor2 = calc_factor(ctrl, uorder,
- j * offset2 +
- i * offset1 -
- new_ctrl->
- geom_t_stride,
- offset3, tolerance,
- dim);
- if (tmp_factor2 > tmp_factor1)
- *(*ufactors + j * 3) = tmp_factor2;
- else
- *(*ufactors + j * 3) = tmp_factor1;
- }
- return GL_NO_ERROR;
-}
-
-static GLenum
-calc_sampling_param_3D(new_ctrl_type * new_ctrl, GLfloat tolerance, GLint dim,
- GLint uorder, GLint vorder, GLint ** ufactors,
- GLint ** vfactors)
-{
- GLfloat *ctrl;
- GLint tmp_factor1, tmp_factor2;
- GLint ufactor_cnt, vfactor_cnt;
- GLint offset1, offset2, offset3;
- GLint i, j;
-
- ufactor_cnt = new_ctrl->s_bezier_cnt;
- vfactor_cnt = new_ctrl->t_bezier_cnt;
- if ((*ufactors = (GLint *) malloc(sizeof(GLint) * ufactor_cnt * 3))
- == NULL) {
- return GLU_OUT_OF_MEMORY;
- }
- if ((*vfactors = (GLint *) malloc(sizeof(GLint) * vfactor_cnt * 3))
- == NULL) {
- free(*ufactors);
- return GLU_OUT_OF_MEMORY;
- }
- ctrl = new_ctrl->geom_ctrl;
- offset1 = new_ctrl->geom_t_stride * vorder;
- offset2 = new_ctrl->geom_s_stride * uorder;
- for (j = 0; j < vfactor_cnt; j++) {
- *(*vfactors + j * 3 + 1) = tmp_factor1 =
- calc_parametric_factor(ctrl, vorder, j * offset1, dim, tolerance,
- dim);
- /* loop ufactor_cnt-1 times */
- for (i = 1; i < ufactor_cnt; i++) {
- tmp_factor2 = calc_parametric_factor(ctrl, vorder,
- j * offset1 + i * offset2, dim,
- tolerance, dim);
- if (tmp_factor2 > tmp_factor1)
- tmp_factor1 = tmp_factor2;
- }
- /* last time for the opposite edge */
- *(*vfactors + j * 3 + 2) = tmp_factor2 =
- calc_parametric_factor(ctrl, vorder,
- j * offset1 + i * offset2 -
- new_ctrl->geom_s_stride, dim, tolerance, dim);
- if (tmp_factor2 > tmp_factor1)
- *(*vfactors + j * 3) = tmp_factor2;
- else
- *(*vfactors + j * 3) = tmp_factor1;
- }
- offset3 = new_ctrl->geom_s_stride;
- offset2 = new_ctrl->geom_s_stride * uorder;
- for (j = 0; j < ufactor_cnt; j++) {
- *(*ufactors + j * 3 + 1) = tmp_factor1 =
- calc_parametric_factor(ctrl, uorder, j * offset2, offset3, tolerance,
- dim);
- /* loop vfactor_cnt-1 times */
- for (i = 1; i < vfactor_cnt; i++) {
- tmp_factor2 = calc_parametric_factor(ctrl, uorder,
- j * offset2 + i * offset1,
- offset3, tolerance, dim);
- if (tmp_factor2 > tmp_factor1)
- tmp_factor1 = tmp_factor2;
- }
- /* last time for the opposite edge */
- *(*ufactors + j * 3 + 2) = tmp_factor2 =
- calc_parametric_factor(ctrl, uorder,
- j * offset2 + i * offset1 -
- new_ctrl->geom_t_stride, offset3, tolerance,
- dim);
- if (tmp_factor2 > tmp_factor1)
- *(*ufactors + j * 3) = tmp_factor2;
- else
- *(*ufactors + j * 3) = tmp_factor1;
- }
- return GL_NO_ERROR;
-}
-
-static GLenum
-calc_sampling_2D(GLfloat * ctrl, GLint cnt, GLint order,
- GLfloat tolerance, GLint dim, GLint ** factors)
-{
- GLint factor_cnt;
- GLint tmp_factor;
- GLint offset;
- GLint i;
-
- factor_cnt = cnt / order;
- if ((*factors = (GLint *) malloc(sizeof(GLint) * factor_cnt)) == NULL) {
- return GLU_OUT_OF_MEMORY;
- }
- offset = order * dim;
- for (i = 0; i < factor_cnt; i++) {
- tmp_factor = calc_factor(ctrl, order, i * offset, dim, tolerance, dim);
- if (tmp_factor == 0)
- (*factors)[i] = 1;
- else
- (*factors)[i] = tmp_factor;
- }
- return GL_NO_ERROR;
-}
-
-static void
-set_sampling_and_culling(GLUnurbsObj * nobj)
-{
- if (nobj->auto_load_matrix == GL_FALSE) {
- GLint i;
- GLfloat m[4];
-
- glPushAttrib((GLbitfield) (GL_VIEWPORT_BIT | GL_TRANSFORM_BIT));
- for (i = 0; i < 4; i++)
- m[i] = nobj->sampling_matrices.viewport[i];
- glViewport(m[0], m[1], m[2], m[3]);
- glMatrixMode(GL_PROJECTION);
- glPushMatrix();
- glLoadMatrixf(nobj->sampling_matrices.proj);
- glMatrixMode(GL_MODELVIEW);
- glPushMatrix();
- glLoadMatrixf(nobj->sampling_matrices.model);
- }
-}
-
-static void
-revert_sampling_and_culling(GLUnurbsObj * nobj)
-{
- if (nobj->auto_load_matrix == GL_FALSE) {
- glMatrixMode(GL_MODELVIEW);
- glPopMatrix();
- glMatrixMode(GL_PROJECTION);
- glPopMatrix();
- glPopAttrib();
- }
-}
-
-GLenum
-glu_do_sampling_3D(GLUnurbsObj * nobj, new_ctrl_type * new_ctrl,
- GLint ** sfactors, GLint ** tfactors)
-{
- GLint dim;
- GLenum err;
-
- *sfactors = NULL;
- *tfactors = NULL;
- dim = nobj->surface.geom.dim;
- set_sampling_and_culling(nobj);
- if ((err = calc_sampling_3D(new_ctrl, nobj->sampling_tolerance, dim,
- nobj->surface.geom.sorder,
- nobj->surface.geom.torder, sfactors,
- tfactors)) == GLU_ERROR) {
- revert_sampling_and_culling(nobj);
- call_user_error(nobj, err);
- return GLU_ERROR;
- }
- revert_sampling_and_culling(nobj);
- return GLU_NO_ERROR;
-}
-
-GLenum
-glu_do_sampling_uv(GLUnurbsObj * nobj, new_ctrl_type * new_ctrl,
- GLint ** sfactors, GLint ** tfactors)
-{
- GLint s_cnt, t_cnt, i;
- GLint u_steps, v_steps;
-
- s_cnt = new_ctrl->s_bezier_cnt;
- t_cnt = new_ctrl->t_bezier_cnt;
- *sfactors = NULL;
- *tfactors = NULL;
- if ((*sfactors = (GLint *) malloc(sizeof(GLint) * s_cnt * 3))
- == NULL) {
- return GLU_OUT_OF_MEMORY;
- }
- if ((*tfactors = (GLint *) malloc(sizeof(GLint) * t_cnt * 3))
- == NULL) {
- free(*sfactors);
- return GLU_OUT_OF_MEMORY;
- }
- u_steps = nobj->u_step;
- v_steps = nobj->v_step;
- for (i = 0; i < s_cnt; i++) {
- *(*sfactors + i * 3) = u_steps;
- *(*sfactors + i * 3 + 1) = u_steps;
- *(*sfactors + i * 3 + 2) = u_steps;
- }
- for (i = 0; i < t_cnt; i++) {
- *(*tfactors + i * 3) = v_steps;
- *(*tfactors + i * 3 + 1) = v_steps;
- *(*tfactors + i * 3 + 2) = v_steps;
- }
- return GLU_NO_ERROR;
-}
-
-
-GLenum
-glu_do_sampling_param_3D(GLUnurbsObj * nobj, new_ctrl_type * new_ctrl,
- GLint ** sfactors, GLint ** tfactors)
-{
- GLint dim;
- GLenum err;
-
- *sfactors = NULL;
- *tfactors = NULL;
- dim = nobj->surface.geom.dim;
- set_sampling_and_culling(nobj);
- if (
- (err =
- calc_sampling_param_3D(new_ctrl, nobj->parametric_tolerance, dim,
- nobj->surface.geom.sorder,
- nobj->surface.geom.torder, sfactors,
- tfactors)) == GLU_ERROR) {
- revert_sampling_and_culling(nobj);
- call_user_error(nobj, err);
- return GLU_ERROR;
- }
- revert_sampling_and_culling(nobj);
- return GLU_NO_ERROR;
-}
-
-
-static GLenum
-glu_do_sampling_2D(GLUnurbsObj * nobj, GLfloat * ctrl, GLint cnt, GLint order,
- GLint dim, GLint ** factors)
-{
- GLenum err;
-
- set_sampling_and_culling(nobj);
- err = calc_sampling_2D(ctrl, cnt, order, nobj->sampling_tolerance, dim,
- factors);
- revert_sampling_and_culling(nobj);
- return err;
-}
-
-
-static GLenum
-glu_do_sampling_u(GLUnurbsObj * nobj, GLfloat * ctrl, GLint cnt, GLint order,
- GLint dim, GLint ** factors)
-{
- GLint i;
- GLint u_steps;
-
- cnt /= order;
- if ((*factors = (GLint *) malloc(sizeof(GLint) * cnt))
- == NULL) {
- return GLU_OUT_OF_MEMORY;
- }
- u_steps = nobj->u_step;
- for (i = 0; i < cnt; i++)
- (*factors)[i] = u_steps;
- return GLU_NO_ERROR;
-}
-
-
-static GLenum
-glu_do_sampling_param_2D(GLUnurbsObj * nobj, GLfloat * ctrl, GLint cnt,
- GLint order, GLint dim, GLint ** factors)
-{
- GLint i;
- GLint u_steps;
- GLfloat tolerance;
-
- set_sampling_and_culling(nobj);
- tolerance = nobj->parametric_tolerance;
- cnt /= order;
- if ((*factors = (GLint *) malloc(sizeof(GLint) * cnt))
- == NULL) {
- revert_sampling_and_culling(nobj);
- return GLU_OUT_OF_MEMORY;
- }
- u_steps = nobj->u_step;
- for (i = 0; i < cnt; i++) {
- (*factors)[i] = calc_parametric_factor(ctrl, order, 0,
- dim, tolerance, dim);
-
- }
- revert_sampling_and_culling(nobj);
- return GLU_NO_ERROR;
-}
-
-GLenum
-glu_do_sampling_crv(GLUnurbsObj * nobj, GLfloat * ctrl, GLint cnt,
- GLint order, GLint dim, GLint ** factors)
-{
- GLenum err;
-
- *factors = NULL;
- switch (nobj->sampling_method) {
- case GLU_PATH_LENGTH:
- if ((err = glu_do_sampling_2D(nobj, ctrl, cnt, order, dim, factors)) !=
- GLU_NO_ERROR) {
- call_user_error(nobj, err);
- return GLU_ERROR;
- }
- break;
- case GLU_DOMAIN_DISTANCE:
- if ((err = glu_do_sampling_u(nobj, ctrl, cnt, order, dim, factors)) !=
- GLU_NO_ERROR) {
- call_user_error(nobj, err);
- return GLU_ERROR;
- }
- break;
- case GLU_PARAMETRIC_ERROR:
- if (
- (err =
- glu_do_sampling_param_2D(nobj, ctrl, cnt, order, dim,
- factors)) != GLU_NO_ERROR) {
- call_user_error(nobj, err);
- return GLU_ERROR;
- }
- break;
- default:
- abort();
- }
-
- return GLU_NO_ERROR;
-}
-
-/* TODO - i don't like this culling - this one just tests if at least one */
-/* ctrl point lies within the viewport . Also the point_in_viewport() */
-/* should be included in the fnctions for efficiency reasons */
-
-static GLboolean
-point_in_viewport(GLfloat * pt, GLint dim)
-{
- GLdouble model[16], proj[16];
- GLint viewport[4];
- GLdouble x, y, z, w, winx, winy, winz;
-
- glGetDoublev(GL_MODELVIEW_MATRIX, model);
- glGetDoublev(GL_PROJECTION_MATRIX, proj);
- glGetIntegerv(GL_VIEWPORT, viewport);
- if (dim == 3) {
- x = (GLdouble) pt[0];
- y = (GLdouble) pt[1];
- z = (GLdouble) pt[2];
- gluProject(x, y, z, model, proj, viewport, &winx, &winy, &winz);
- }
- else {
- w = (GLdouble) pt[3];
- x = (GLdouble) pt[0] / w;
- y = (GLdouble) pt[1] / w;
- z = (GLdouble) pt[2] / w;
- gluProject(x, y, z, model, proj, viewport, &winx, &winy, &winz);
- }
- if ((GLint) winx >= viewport[0] && (GLint) winx < viewport[2] &&
- (GLint) winy >= viewport[1] && (GLint) winy < viewport[3])
- return GL_TRUE;
- return GL_FALSE;
-}
-
-GLboolean
-fine_culling_test_3D(GLUnurbsObj * nobj, GLfloat * pts, GLint s_cnt,
- GLint t_cnt, GLint s_stride, GLint t_stride, GLint dim)
-{
- GLint i, j;
-
- if (nobj->culling == GL_FALSE)
- return GL_FALSE;
- set_sampling_and_culling(nobj);
-
- if (dim == 3) {
- for (i = 0; i < s_cnt; i++)
- for (j = 0; j < t_cnt; j++)
- if (point_in_viewport(pts + i * s_stride + j * t_stride, dim)) {
- revert_sampling_and_culling(nobj);
- return GL_FALSE;
- }
- }
- else {
- for (i = 0; i < s_cnt; i++)
- for (j = 0; j < t_cnt; j++)
- if (point_in_viewport(pts + i * s_stride + j * t_stride, dim)) {
- revert_sampling_and_culling(nobj);
- return GL_FALSE;
- }
- }
- revert_sampling_and_culling(nobj);
- return GL_TRUE;
-}
-
-/*GLboolean
-fine_culling_test_3D(GLUnurbsObj *nobj,GLfloat *pts,GLint s_cnt,GLint t_cnt,
- GLint s_stride,GLint t_stride, GLint dim)
-{
- GLint visible_cnt;
- GLfloat feedback_buffer[5];
- GLsizei buffer_size;
- GLint i,j;
-
- if(nobj->culling==GL_FALSE)
- return GL_FALSE;
- buffer_size=5;
- set_sampling_and_culling(nobj);
-
- glFeedbackBuffer(buffer_size,GL_2D,feedback_buffer);
- glRenderMode(GL_FEEDBACK);
- if(dim==3)
- {
- for(i=0;i<s_cnt;i++)
- {
- glBegin(GL_LINE_LOOP);
- for(j=0;j<t_cnt;j++)
- glVertex3fv(pts+i*s_stride+j*t_stride);
- glEnd();
- }
- for(j=0;j<t_cnt;j++)
- {
- glBegin(GL_LINE_LOOP);
- for(i=0;i<s_cnt;i++)
- glVertex3fv(pts+i*s_stride+j*t_stride);
- glEnd();
- }
- }
- else
- {
- for(i=0;i<s_cnt;i++)
- {
- glBegin(GL_LINE_LOOP);
- for(j=0;j<t_cnt;j++)
- glVertex4fv(pts+i*s_stride+j*t_stride);
- glEnd();
- }
- for(j=0;j<t_cnt;j++)
- {
- glBegin(GL_LINE_LOOP);
- for(i=0;i<s_cnt;i++)
- glVertex4fv(pts+i*s_stride+j*t_stride);
- glEnd();
- }
- }
- visible_cnt=glRenderMode(GL_RENDER);
-
- revert_sampling_and_culling(nobj);
- return (GLboolean)(visible_cnt==0);
-}*/
-
-GLboolean
-fine_culling_test_2D(GLUnurbsObj * nobj, GLfloat * pts, GLint cnt,
- GLint stride, GLint dim)
-{
- GLint i;
-
- if (nobj->culling == GL_FALSE)
- return GL_FALSE;
- set_sampling_and_culling(nobj);
-
- if (dim == 3) {
- for (i = 0; i < cnt; i++)
- if (point_in_viewport(pts + i * stride, dim)) {
- revert_sampling_and_culling(nobj);
- return GL_FALSE;
- }
- }
- else {
- for (i = 0; i < cnt; i++)
- if (point_in_viewport(pts + i * stride, dim)) {
- revert_sampling_and_culling(nobj);
- return GL_FALSE;
- }
- }
- revert_sampling_and_culling(nobj);
- return GL_TRUE;
-}
-
-/*GLboolean
-fine_culling_test_2D(GLUnurbsObj *nobj,GLfloat *pts,GLint cnt,
- GLint stride, GLint dim)
-{
- GLint visible_cnt;
- GLfloat feedback_buffer[5];
- GLsizei buffer_size;
- GLint i;
-
- if(nobj->culling==GL_FALSE)
- return GL_FALSE;
- buffer_size=5;
- set_sampling_and_culling(nobj);
-
- glFeedbackBuffer(buffer_size,GL_2D,feedback_buffer);
- glRenderMode(GL_FEEDBACK);
- glBegin(GL_LINE_LOOP);
- if(dim==3)
- {
- for(i=0;i<cnt;i++)
- glVertex3fv(pts+i*stride);
- }
- else
- {
- for(i=0;i<cnt;i++)
- glVertex4fv(pts+i*stride);
- }
- glEnd();
- visible_cnt=glRenderMode(GL_RENDER);
-
- revert_sampling_and_culling(nobj);
- return (GLboolean)(visible_cnt==0);
-}*/
+++ /dev/null
-
-/*
- * Mesa 3-D graphics library
- * Version: 3.3
- * Copyright (C) 1995-2000 Brian Paul
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-
-/*
- * This file is part of the polygon tesselation code contributed by
- * Bogdan Sikorski
- */
-
-
-#ifdef PC_HEADER
-#include "all.h"
-#else
-#include <math.h>
-#include <stdlib.h>
-#include "gluP.h"
-#include "tess.h"
-#endif
-
-
-
-static GLenum store_polygon_as_contour(GLUtriangulatorObj *);
-static void free_current_polygon(tess_polygon *);
-static void prepare_projection_info(GLUtriangulatorObj *);
-static GLdouble twice_the_polygon_area(tess_vertex *, tess_vertex *);
-static GLenum verify_edge_vertex_intersections(GLUtriangulatorObj *);
-void tess_find_contour_hierarchies(GLUtriangulatorObj *);
-static GLenum test_for_overlapping_contours(GLUtriangulatorObj *);
-static GLenum contours_overlap(tess_contour *, tess_polygon *);
-static GLenum is_contour_contained_in(tess_contour *, tess_contour *);
-static void add_new_exterior(GLUtriangulatorObj *, tess_contour *);
-static void add_new_interior(GLUtriangulatorObj *, tess_contour *,
- tess_contour *);
-static void add_interior_with_hierarchy_check(GLUtriangulatorObj *,
- tess_contour *, tess_contour *);
-static void reverse_hierarchy_and_add_exterior(GLUtriangulatorObj *,
- tess_contour *,
- tess_contour *);
-static GLboolean point_in_polygon(tess_contour *, GLdouble, GLdouble);
-static void shift_interior_to_exterior(GLUtriangulatorObj *, tess_contour *);
-static void add_exterior_with_check(GLUtriangulatorObj *, tess_contour *,
- tess_contour *);
-static GLenum cut_out_hole(GLUtriangulatorObj *, tess_contour *,
- tess_contour *);
-static GLenum merge_hole_with_contour(GLUtriangulatorObj *,
- tess_contour *, tess_contour *,
- tess_vertex *, tess_vertex *);
-
-static GLenum
-find_normal(GLUtriangulatorObj * tobj)
-{
- tess_polygon *polygon = tobj->current_polygon;
- tess_vertex *va, *vb, *vc;
- GLdouble A, B, C;
- GLdouble A0, A1, A2, B0, B1, B2;
-
- va = polygon->vertices;
- vb = va->next;
- A0 = vb->location[0] - va->location[0];
- A1 = vb->location[1] - va->location[1];
- A2 = vb->location[2] - va->location[2];
- for (vc = vb->next; vc != va; vc = vc->next) {
- B0 = vc->location[0] - va->location[0];
- B1 = vc->location[1] - va->location[1];
- B2 = vc->location[2] - va->location[2];
- A = A1 * B2 - A2 * B1;
- B = A2 * B0 - A0 * B2;
- C = A0 * B1 - A1 * B0;
- if (fabs(A) > EPSILON || fabs(B) > EPSILON || fabs(C) > EPSILON) {
- polygon->A = A;
- polygon->B = B;
- polygon->C = C;
- polygon->D =
- -A * va->location[0] - B * va->location[1] - C * va->location[2];
- return GLU_NO_ERROR;
- }
- }
- tess_call_user_error(tobj, GLU_TESS_ERROR7);
- return GLU_ERROR;
-}
-
-void
-tess_test_polygon(GLUtriangulatorObj * tobj)
-{
- tess_polygon *polygon = tobj->current_polygon;
-
- /* any vertices defined? */
- if (polygon->vertex_cnt < 3) {
- free_current_polygon(polygon);
- return;
- }
- /* wrap pointers */
- polygon->last_vertex->next = polygon->vertices;
- polygon->vertices->previous = polygon->last_vertex;
- /* determine the normal */
- if (find_normal(tobj) == GLU_ERROR)
- return;
- /* compare the normals of previously defined contours and this one */
- /* first contour define ? */
- if (tobj->contours == NULL) {
- tobj->A = polygon->A;
- tobj->B = polygon->B;
- tobj->C = polygon->C;
- tobj->D = polygon->D;
- /* determine the best projection to use */
- if (fabs(polygon->A) > fabs(polygon->B))
- if (fabs(polygon->A) > fabs(polygon->C))
- tobj->projection = OYZ;
- else
- tobj->projection = OXY;
- else if (fabs(polygon->B) > fabs(polygon->C))
- tobj->projection = OXZ;
- else
- tobj->projection = OXY;
- }
- else {
- GLdouble a[3], b[3];
- tess_vertex *vertex = polygon->vertices;
-
- a[0] = tobj->A;
- a[1] = tobj->B;
- a[2] = tobj->C;
- b[0] = polygon->A;
- b[1] = polygon->B;
- b[2] = polygon->C;
-
- /* compare the normals */
- if (fabs(a[1] * b[2] - a[2] * b[1]) > EPSILON ||
- fabs(a[2] * b[0] - a[0] * b[2]) > EPSILON ||
- fabs(a[0] * b[1] - a[1] * b[0]) > EPSILON) {
- /* not coplanar */
- tess_call_user_error(tobj, GLU_TESS_ERROR9);
- return;
- }
- /* the normals are parallel - test for plane equation */
- if (fabs(a[0] * vertex->location[0] + a[1] * vertex->location[1] +
- a[2] * vertex->location[2] + tobj->D) > EPSILON) {
- /* not the same plane */
- tess_call_user_error(tobj, GLU_TESS_ERROR9);
- return;
- }
- }
- prepare_projection_info(tobj);
- if (verify_edge_vertex_intersections(tobj) == GLU_ERROR)
- return;
- if (test_for_overlapping_contours(tobj) == GLU_ERROR)
- return;
- if (store_polygon_as_contour(tobj) == GLU_ERROR)
- return;
-}
-
-static GLenum
-test_for_overlapping_contours(GLUtriangulatorObj * tobj)
-{
- tess_contour *contour;
- tess_polygon *polygon;
-
- polygon = tobj->current_polygon;
- for (contour = tobj->contours; contour != NULL; contour = contour->next)
- if (contours_overlap(contour, polygon) != GLU_NO_ERROR) {
- tess_call_user_error(tobj, GLU_TESS_ERROR5);
- return GLU_ERROR;
- }
- return GLU_NO_ERROR;
-}
-
-static GLenum
-store_polygon_as_contour(GLUtriangulatorObj * tobj)
-{
- tess_polygon *polygon = tobj->current_polygon;
- tess_contour *contour = tobj->contours;
-
- /* the first contour defined */
- if (contour == NULL) {
- if ((contour = (tess_contour *) malloc(sizeof(tess_contour))) == NULL) {
- tess_call_user_error(tobj, GLU_OUT_OF_MEMORY);
- free_current_polygon(polygon);
- return GLU_ERROR;
- }
- tobj->contours = tobj->last_contour = contour;
- contour->next = contour->previous = NULL;
- }
- else {
- if ((contour = (tess_contour *) malloc(sizeof(tess_contour))) == NULL) {
- tess_call_user_error(tobj, GLU_OUT_OF_MEMORY);
- free_current_polygon(polygon);
- return GLU_ERROR;
- }
- contour->previous = tobj->last_contour;
- tobj->last_contour->next = contour;
- tobj->last_contour = contour;
- contour->next = NULL;
- }
- /* mark all vertices in new contour as not special */
- /* and all are boundary edges */
- {
- tess_vertex *vertex;
- GLuint vertex_cnt, i;
-
- for (vertex = polygon->vertices, i = 0, vertex_cnt =
- polygon->vertex_cnt; i < vertex_cnt; vertex = vertex->next, i++) {
- vertex->shadow_vertex = NULL;
- vertex->edge_flag = GL_TRUE;
- }
- }
- contour->vertex_cnt = polygon->vertex_cnt;
- contour->area = polygon->area;
- contour->orientation = polygon->orientation;
- contour->type = GLU_UNKNOWN;
- contour->vertices = polygon->vertices;
- contour->last_vertex = polygon->last_vertex;
- polygon->vertices = polygon->last_vertex = NULL;
- polygon->vertex_cnt = 0;
- ++(tobj->contour_cnt);
- return GLU_NO_ERROR;
-}
-
-static void
-free_current_polygon(tess_polygon * polygon)
-{
- tess_vertex *vertex, *vertex_tmp;
- GLuint i;
-
- /* free current_polygon structures */
- for (vertex = polygon->vertices, i = 0; i < polygon->vertex_cnt; i++) {
- vertex_tmp = vertex->next;
- free(vertex);
- vertex = vertex_tmp;
- }
- polygon->vertices = polygon->last_vertex = NULL;
- polygon->vertex_cnt = 0;
-}
-
-static void
-prepare_projection_info(GLUtriangulatorObj * tobj)
-{
- tess_polygon *polygon = tobj->current_polygon;
- tess_vertex *vertex, *last_vertex_ptr;
- GLdouble area;
-
- last_vertex_ptr = polygon->last_vertex;
- switch (tobj->projection) {
- case OXY:
- for (vertex = polygon->vertices; vertex != last_vertex_ptr;
- vertex = vertex->next) {
- vertex->x = vertex->location[0];
- vertex->y = vertex->location[1];
- }
- last_vertex_ptr->x = last_vertex_ptr->location[0];
- last_vertex_ptr->y = last_vertex_ptr->location[1];
- break;
- case OXZ:
- for (vertex = polygon->vertices; vertex != last_vertex_ptr;
- vertex = vertex->next) {
- vertex->x = vertex->location[0];
- vertex->y = vertex->location[2];
- }
- last_vertex_ptr->x = last_vertex_ptr->location[0];
- last_vertex_ptr->y = last_vertex_ptr->location[2];
- break;
- case OYZ:
- for (vertex = polygon->vertices; vertex != last_vertex_ptr;
- vertex = vertex->next) {
- vertex->x = vertex->location[1];
- vertex->y = vertex->location[2];
- }
- last_vertex_ptr->x = last_vertex_ptr->location[1];
- last_vertex_ptr->y = last_vertex_ptr->location[2];
- break;
- }
- area = twice_the_polygon_area(polygon->vertices, polygon->last_vertex);
- if (area >= 0.0) {
- polygon->orientation = GLU_CCW;
- polygon->area = area;
- }
- else {
- polygon->orientation = GLU_CW;
- polygon->area = -area;
- }
-}
-
-static GLdouble
-twice_the_polygon_area(tess_vertex * vertex, tess_vertex * last_vertex)
-{
- tess_vertex *next;
- GLdouble area, x, y;
-
- area = 0.0;
- x = vertex->x;
- y = vertex->y;
- vertex = vertex->next;
- for (; vertex != last_vertex; vertex = vertex->next) {
- next = vertex->next;
- area +=
- (vertex->x - x) * (next->y - y) - (vertex->y - y) * (next->x - x);
- }
- return area;
-}
-
-/* test if edges ab and cd intersect */
-/* if not return GLU_NO_ERROR, else if cross return GLU_TESS_ERROR8, */
-/* else if adjacent return GLU_TESS_ERROR4 */
-static GLenum
-edge_edge_intersect(tess_vertex * a,
- tess_vertex * b, tess_vertex * c, tess_vertex * d)
-{
- GLdouble denom, r, s;
- GLdouble xba, ydc, yba, xdc, yac, xac;
-
- xba = b->x - a->x;
- yba = b->y - a->y;
- xdc = d->x - c->x;
- ydc = d->y - c->y;
- xac = a->x - c->x;
- yac = a->y - c->y;
- denom = xba * ydc - yba * xdc;
- r = yac * xdc - xac * ydc;
- /* parallel? */
- if (fabs(denom) < EPSILON) {
- if (fabs(r) < EPSILON) {
- /* colinear */
- if (fabs(xba) < EPSILON) {
- /* compare the Y coordinate */
- if (yba > 0.0) {
- if (
- (fabs(a->y - c->y) < EPSILON
- && fabs(c->y - b->y) < EPSILON)
- || (fabs(a->y - d->y) < EPSILON
- && fabs(d->y - b->y) <
- EPSILON)) return GLU_TESS_ERROR4;
-
- }
- else {
- if (
- (fabs(b->y - c->y) < EPSILON
- && fabs(c->y - a->y) < EPSILON)
- || (fabs(b->y - d->y) < EPSILON
- && fabs(d->y - a->y) <
- EPSILON)) return GLU_TESS_ERROR4;
- }
- }
- else {
- /* compare the X coordinate */
- if (xba > 0.0) {
- if (
- (fabs(a->x - c->x) < EPSILON
- && fabs(c->x - b->x) < EPSILON)
- || (fabs(a->x - d->x) < EPSILON
- && fabs(d->x - b->x) <
- EPSILON)) return GLU_TESS_ERROR4;
- }
- else {
- if (
- (fabs(b->x - c->x) < EPSILON
- && fabs(c->x - a->x) < EPSILON)
- || (fabs(b->x - d->x) < EPSILON
- && fabs(d->x - a->x) <
- EPSILON)) return GLU_TESS_ERROR4;
- }
- }
- }
- return GLU_NO_ERROR;
- }
- r /= denom;
- s = (yac * xba - xac * yba) / denom;
- /* test if one vertex lies on other edge */
- if (((fabs(r) < EPSILON || (r < 1.0 + EPSILON && r > 1.0 - EPSILON)) &&
- s > -EPSILON && s < 1.0 + EPSILON) ||
- ((fabs(s) < EPSILON || (s < 1.0 + EPSILON && s > 1.0 - EPSILON)) &&
- r > -EPSILON && r < 1.0 + EPSILON)) {
- return GLU_TESS_ERROR4;
- }
- /* test for crossing */
- if (r > -EPSILON && r < 1.0 + EPSILON && s > -EPSILON && s < 1.0 + EPSILON) {
- return GLU_TESS_ERROR8;
- }
- return GLU_NO_ERROR;
-}
-
-static GLenum
-verify_edge_vertex_intersections(GLUtriangulatorObj * tobj)
-{
- tess_polygon *polygon = tobj->current_polygon;
- tess_vertex *vertex1, *last_vertex, *vertex2;
- GLenum test;
-
- last_vertex = polygon->last_vertex;
- vertex1 = last_vertex;
- for (vertex2 = vertex1->next->next;
- vertex2->next != last_vertex; vertex2 = vertex2->next) {
- test = edge_edge_intersect(vertex1, vertex1->next, vertex2,
- vertex2->next);
- if (test != GLU_NO_ERROR) {
- tess_call_user_error(tobj, test);
- return GLU_ERROR;
- }
- }
- for (vertex1 = polygon->vertices;
- vertex1->next->next != last_vertex; vertex1 = vertex1->next) {
- for (vertex2 = vertex1->next->next;
- vertex2 != last_vertex; vertex2 = vertex2->next) {
- test = edge_edge_intersect(vertex1, vertex1->next, vertex2,
- vertex2->next);
- if (test != GLU_NO_ERROR) {
- tess_call_user_error(tobj, test);
- return GLU_ERROR;
- }
- }
- }
- return GLU_NO_ERROR;
-}
-
-static int
-#ifdef WIN32
- __cdecl
-#endif
-area_compare(const void *a, const void *b)
-{
- GLdouble area1, area2;
-
- area1 = (*((tess_contour **) a))->area;
- area2 = (*((tess_contour **) b))->area;
- if (area1 < area2)
- return 1;
- if (area1 > area2)
- return -1;
- return 0;
-}
-
-void
-tess_find_contour_hierarchies(GLUtriangulatorObj * tobj)
-{
- tess_contour **contours; /* dinamic array of pointers */
- tess_contour *tmp_contour_ptr = tobj->contours;
- GLuint cnt, i;
- GLenum result;
- GLboolean hierarchy_changed;
-
- /* any contours? */
- if (tobj->contour_cnt < 2) {
- tobj->contours->type = GLU_EXTERIOR;
- return;
- }
- if ((contours = (tess_contour **)
- malloc(sizeof(tess_contour *) * (tobj->contour_cnt))) == NULL) {
- tess_call_user_error(tobj, GLU_OUT_OF_MEMORY);
- return;
- }
- for (tmp_contour_ptr = tobj->contours, cnt = 0;
- tmp_contour_ptr != NULL; tmp_contour_ptr = tmp_contour_ptr->next)
- contours[cnt++] = tmp_contour_ptr;
- /* now sort the contours in decreasing area size order */
- qsort((void *) contours, (size_t) cnt, (size_t) sizeof(tess_contour *),
- area_compare);
- /* we leave just the first contour - remove others from list */
- tobj->contours = contours[0];
- tobj->contours->next = tobj->contours->previous = NULL;
- tobj->last_contour = tobj->contours;
- tobj->contour_cnt = 1;
- /* first contour is the one with greatest area */
- /* must be EXTERIOR */
- tobj->contours->type = GLU_EXTERIOR;
- tmp_contour_ptr = tobj->contours;
- /* now we play! */
- for (i = 1; i < cnt; i++) {
- hierarchy_changed = GL_FALSE;
- for (tmp_contour_ptr = tobj->contours;
- tmp_contour_ptr != NULL; tmp_contour_ptr = tmp_contour_ptr->next) {
- if (tmp_contour_ptr->type == GLU_EXTERIOR) {
- /* check if contour completely contained in EXTERIOR */
- result = is_contour_contained_in(tmp_contour_ptr, contours[i]);
- switch (result) {
- case GLU_INTERIOR:
- /* now we have to check if contour is inside interiors */
- /* or not */
- /* any interiors? */
- if (tmp_contour_ptr->next != NULL &&
- tmp_contour_ptr->next->type == GLU_INTERIOR) {
- /* for all interior, check if inside any of them */
- /* if not inside any of interiors, its another */
- /* interior */
- /* or it may contain some interiors, then change */
- /* the contained interiors to exterior ones */
- add_interior_with_hierarchy_check(tobj,
- tmp_contour_ptr,
- contours[i]);
- }
- else {
- /* not in interior, add as new interior contour */
- add_new_interior(tobj, tmp_contour_ptr, contours[i]);
- }
- hierarchy_changed = GL_TRUE;
- break;
- case GLU_EXTERIOR:
- /* ooops, the marked as EXTERIOR (contours[i]) is */
- /* actually an interior of tmp_contour_ptr */
- /* reverse the local hierarchy */
- reverse_hierarchy_and_add_exterior(tobj, tmp_contour_ptr,
- contours[i]);
- hierarchy_changed = GL_TRUE;
- break;
- case GLU_NO_ERROR:
- break;
- default:
- abort();
- }
- }
- if (hierarchy_changed)
- break; /* break from for loop */
- }
- if (hierarchy_changed == GL_FALSE) {
- /* disjoint with all contours, add to contour list */
- add_new_exterior(tobj, contours[i]);
- }
- }
- free(contours);
-}
-
-/* returns GLU_INTERIOR if inner is completey enclosed within outer */
-/* returns GLU_EXTERIOR if outer is completely enclosed within inner */
-/* returns GLU_NO_ERROR if contours are disjoint */
-static GLenum
-is_contour_contained_in(tess_contour * outer, tess_contour * inner)
-{
- GLenum relation_flag;
-
- /* set relation_flag to relation of containment of first inner vertex */
- /* regarding outer contour */
- if (point_in_polygon(outer, inner->vertices->x, inner->vertices->y))
- relation_flag = GLU_INTERIOR;
- else
- relation_flag = GLU_EXTERIOR;
- if (relation_flag == GLU_INTERIOR)
- return GLU_INTERIOR;
- if (point_in_polygon(inner, outer->vertices->x, outer->vertices->y))
- return GLU_EXTERIOR;
- return GLU_NO_ERROR;
-}
-
-static GLboolean
-point_in_polygon(tess_contour * contour, GLdouble x, GLdouble y)
-{
- tess_vertex *v1, *v2;
- GLuint i, vertex_cnt;
- GLdouble xp1, yp1, xp2, yp2;
- GLboolean tst;
-
- tst = GL_FALSE;
- v1 = contour->vertices;
- v2 = contour->vertices->previous;
- for (i = 0, vertex_cnt = contour->vertex_cnt; i < vertex_cnt; i++) {
- xp1 = v1->x;
- yp1 = v1->y;
- xp2 = v2->x;
- yp2 = v2->y;
- if ((((yp1 <= y) && (y < yp2)) || ((yp2 <= y) && (y < yp1))) &&
- (x < (xp2 - xp1) * (y - yp1) / (yp2 - yp1) + xp1))
- tst = (tst == GL_FALSE ? GL_TRUE : GL_FALSE);
- v2 = v1;
- v1 = v1->next;
- }
- return tst;
-}
-
-static GLenum
-contours_overlap(tess_contour * contour, tess_polygon * polygon)
-{
- tess_vertex *vertex1, *vertex2;
- GLuint vertex1_cnt, vertex2_cnt, i, j;
- GLenum test;
-
- vertex1 = contour->vertices;
- vertex2 = polygon->vertices;
- vertex1_cnt = contour->vertex_cnt;
- vertex2_cnt = polygon->vertex_cnt;
- for (i = 0; i < vertex1_cnt; vertex1 = vertex1->next, i++) {
- for (j = 0; j < vertex2_cnt; vertex2 = vertex2->next, j++)
- if ((test = edge_edge_intersect(vertex1, vertex1->next, vertex2,
- vertex2->next)) != GLU_NO_ERROR)
- return test;
- }
- return GLU_NO_ERROR;
-}
-
-static void
-add_new_exterior(GLUtriangulatorObj * tobj, tess_contour * contour)
-{
- contour->type = GLU_EXTERIOR;
- contour->next = NULL;
- contour->previous = tobj->last_contour;
- tobj->last_contour->next = contour;
- tobj->last_contour = contour;
-}
-
-static void
-add_new_interior(GLUtriangulatorObj * tobj,
- tess_contour * outer, tess_contour * contour)
-{
- contour->type = GLU_INTERIOR;
- contour->next = outer->next;
- contour->previous = outer;
- if (outer->next != NULL)
- outer->next->previous = contour;
- outer->next = contour;
- if (tobj->last_contour == outer)
- tobj->last_contour = contour;
-}
-
-static void
-add_interior_with_hierarchy_check(GLUtriangulatorObj * tobj,
- tess_contour * outer,
- tess_contour * contour)
-{
- tess_contour *ptr;
-
- /* for all interiors of outer check if they are interior of contour */
- /* if so, change that interior to exterior and move it of of the */
- /* interior sequence */
- if (outer->next != NULL && outer->next->type == GLU_INTERIOR) {
- GLenum test;
-
- for (ptr = outer->next; ptr != NULL && ptr->type == GLU_INTERIOR;
- ptr = ptr->next) {
- test = is_contour_contained_in(ptr, contour);
- switch (test) {
- case GLU_INTERIOR:
- /* contour is contained in one of the interiors */
- /* check if possibly contained in other exteriors */
- /* move ptr to first EXTERIOR */
- for (; ptr != NULL && ptr->type == GLU_INTERIOR; ptr = ptr->next);
- if (ptr == NULL)
- /* another exterior */
- add_new_exterior(tobj, contour);
- else
- add_exterior_with_check(tobj, ptr, contour);
- return;
- case GLU_EXTERIOR:
- /* one of the interiors is contained in the contour */
- /* change it to EXTERIOR, and shift it away from the */
- /* interior sequence */
- shift_interior_to_exterior(tobj, ptr);
- break;
- case GLU_NO_ERROR:
- /* disjoint */
- break;
- default:
- abort();
- }
- }
- }
- /* add contour to the interior sequence */
- add_new_interior(tobj, outer, contour);
-}
-
-static void
-reverse_hierarchy_and_add_exterior(GLUtriangulatorObj * tobj,
- tess_contour * outer,
- tess_contour * contour)
-{
- tess_contour *ptr;
-
- /* reverse INTERIORS to EXTERIORS */
- /* any INTERIORS? */
- if (outer->next != NULL && outer->next->type == GLU_INTERIOR)
- for (ptr = outer->next; ptr != NULL && ptr->type == GLU_INTERIOR;
- ptr = ptr->next) ptr->type = GLU_EXTERIOR;
- /* the outer now becomes inner */
- outer->type = GLU_INTERIOR;
- /* contour is the EXTERIOR */
- contour->next = outer;
- if (tobj->contours == outer) {
- /* first contour beeing reversed */
- contour->previous = NULL;
- tobj->contours = contour;
- }
- else {
- outer->previous->next = contour;
- contour->previous = outer->previous;
- }
- outer->previous = contour;
-}
-
-static void
-shift_interior_to_exterior(GLUtriangulatorObj * tobj, tess_contour * contour)
-{
- contour->previous->next = contour->next;
- if (contour->next != NULL)
- contour->next->previous = contour->previous;
- else
- tobj->last_contour = contour->previous;
-}
-
-static void
-add_exterior_with_check(GLUtriangulatorObj * tobj,
- tess_contour * outer, tess_contour * contour)
-{
- GLenum test;
-
- /* this contour might be interior to further exteriors - check */
- /* if not, just add as a new exterior */
- for (; outer != NULL && outer->type == GLU_EXTERIOR; outer = outer->next) {
- test = is_contour_contained_in(outer, contour);
- switch (test) {
- case GLU_INTERIOR:
- /* now we have to check if contour is inside interiors */
- /* or not */
- /* any interiors? */
- if (outer->next != NULL && outer->next->type == GLU_INTERIOR) {
- /* for all interior, check if inside any of them */
- /* if not inside any of interiors, its another */
- /* interior */
- /* or it may contain some interiors, then change */
- /* the contained interiors to exterior ones */
- add_interior_with_hierarchy_check(tobj, outer, contour);
- }
- else {
- /* not in interior, add as new interior contour */
- add_new_interior(tobj, outer, contour);
- }
- return;
- case GLU_NO_ERROR:
- /* disjoint */
- break;
- default:
- abort();
- }
- }
- /* add contour to the exterior sequence */
- add_new_exterior(tobj, contour);
-}
-
-void
-tess_handle_holes(GLUtriangulatorObj * tobj)
-{
- tess_contour *contour, *hole;
- GLenum exterior_orientation;
-
- /* verify hole orientation */
- for (contour = tobj->contours; contour != NULL;) {
- exterior_orientation = contour->orientation;
- for (contour = contour->next;
- contour != NULL && contour->type == GLU_INTERIOR;
- contour = contour->next) {
- if (contour->orientation == exterior_orientation) {
- tess_call_user_error(tobj, GLU_TESS_ERROR5);
- return;
- }
- }
- }
- /* now cut-out holes */
- for (contour = tobj->contours; contour != NULL;) {
- hole = contour->next;
- while (hole != NULL && hole->type == GLU_INTERIOR) {
- if (cut_out_hole(tobj, contour, hole) == GLU_ERROR)
- return;
- hole = contour->next;
- }
- contour = contour->next;
- }
-}
-
-static GLenum
-cut_out_hole(GLUtriangulatorObj * tobj,
- tess_contour * contour, tess_contour * hole)
-{
- tess_contour *tmp_hole;
- tess_vertex *v1, *v2, *tmp_vertex;
- GLuint vertex1_cnt, vertex2_cnt, tmp_vertex_cnt;
- GLuint i, j, k;
- GLenum test = 0;
-
- /* find an edge connecting contour and hole not intersecting any other */
- /* edge belonging to either the contour or any of the other holes */
- for (v1 = contour->vertices, vertex1_cnt = contour->vertex_cnt, i = 0;
- i < vertex1_cnt; i++, v1 = v1->next) {
- for (v2 = hole->vertices, vertex2_cnt = hole->vertex_cnt, j = 0;
- j < vertex2_cnt; j++, v2 = v2->next) {
- /* does edge (v1,v2) intersect any edge of contour */
- for (tmp_vertex = contour->vertices, tmp_vertex_cnt =
- contour->vertex_cnt, k = 0; k < tmp_vertex_cnt;
- tmp_vertex = tmp_vertex->next, k++) {
- /* skip edge tests for edges directly connected */
- if (v1 == tmp_vertex || v1 == tmp_vertex->next)
- continue;
- test = edge_edge_intersect(v1, v2, tmp_vertex, tmp_vertex->next);
- if (test != GLU_NO_ERROR)
- break;
- }
- if (test == GLU_NO_ERROR) {
- /* does edge (v1,v2) intersect any edge of hole */
- for (tmp_vertex = hole->vertices,
- tmp_vertex_cnt = hole->vertex_cnt, k = 0;
- k < tmp_vertex_cnt; tmp_vertex = tmp_vertex->next, k++) {
- /* skip edge tests for edges directly connected */
- if (v2 == tmp_vertex || v2 == tmp_vertex->next)
- continue;
- test =
- edge_edge_intersect(v1, v2, tmp_vertex, tmp_vertex->next);
- if (test != GLU_NO_ERROR)
- break;
- }
- if (test == GLU_NO_ERROR) {
- /* does edge (v1,v2) intersect any other hole? */
- for (tmp_hole = hole->next;
- tmp_hole != NULL && tmp_hole->type == GLU_INTERIOR;
- tmp_hole = tmp_hole->next) {
- /* does edge (v1,v2) intersect any edge of hole */
- for (tmp_vertex = tmp_hole->vertices,
- tmp_vertex_cnt = tmp_hole->vertex_cnt, k = 0;
- k < tmp_vertex_cnt; tmp_vertex = tmp_vertex->next, k++) {
- test = edge_edge_intersect(v1, v2, tmp_vertex,
- tmp_vertex->next);
- if (test != GLU_NO_ERROR)
- break;
- }
- if (test != GLU_NO_ERROR)
- break;
- }
- }
- }
- if (test == GLU_NO_ERROR) {
- /* edge (v1,v2) is good for eliminating the hole */
- if (merge_hole_with_contour(tobj, contour, hole, v1, v2)
- == GLU_NO_ERROR)
- return GLU_NO_ERROR;
- else
- return GLU_ERROR;
- }
- }
- }
- /* other holes are blocking all possible connections of hole */
- /* with contour, we shift this hole as the last hole and retry */
- for (tmp_hole = hole;
- tmp_hole != NULL && tmp_hole->type == GLU_INTERIOR;
- tmp_hole = tmp_hole->next);
- contour->next = hole->next;
- hole->next->previous = contour;
- if (tmp_hole == NULL) {
- /* last EXTERIOR contour, shift hole as last contour */
- hole->next = NULL;
- hole->previous = tobj->last_contour;
- tobj->last_contour->next = hole;
- tobj->last_contour = hole;
- }
- else {
- tmp_hole->previous->next = hole;
- hole->previous = tmp_hole->previous;
- tmp_hole->previous = hole;
- hole->next = tmp_hole;
- }
- hole = contour->next;
- /* try once again - recurse */
- return cut_out_hole(tobj, contour, hole);
-}
-
-static GLenum
-merge_hole_with_contour(GLUtriangulatorObj * tobj,
- tess_contour * contour,
- tess_contour * hole,
- tess_vertex * v1, tess_vertex * v2)
-{
- tess_vertex *v1_new, *v2_new;
-
- /* make copies of v1 and v2, place them respectively after their originals */
- if ((v1_new = (tess_vertex *) malloc(sizeof(tess_vertex))) == NULL) {
- tess_call_user_error(tobj, GLU_OUT_OF_MEMORY);
- return GLU_ERROR;
- }
- if ((v2_new = (tess_vertex *) malloc(sizeof(tess_vertex))) == NULL) {
- tess_call_user_error(tobj, GLU_OUT_OF_MEMORY);
- return GLU_ERROR;
- }
- v1_new->edge_flag = GL_TRUE;
- v1_new->data = v1->data;
- v1_new->location[0] = v1->location[0];
- v1_new->location[1] = v1->location[1];
- v1_new->location[2] = v1->location[2];
- v1_new->x = v1->x;
- v1_new->y = v1->y;
- v1_new->shadow_vertex = v1;
- v1->shadow_vertex = v1_new;
- v1_new->next = v1->next;
- v1_new->previous = v1;
- v1->next->previous = v1_new;
- v1->next = v1_new;
- v2_new->edge_flag = GL_TRUE;
- v2_new->data = v2->data;
- v2_new->location[0] = v2->location[0];
- v2_new->location[1] = v2->location[1];
- v2_new->location[2] = v2->location[2];
- v2_new->x = v2->x;
- v2_new->y = v2->y;
- v2_new->shadow_vertex = v2;
- v2->shadow_vertex = v2_new;
- v2_new->next = v2->next;
- v2_new->previous = v2;
- v2->next->previous = v2_new;
- v2->next = v2_new;
- /* link together the two lists */
- v1->next = v2_new;
- v2_new->previous = v1;
- v2->next = v1_new;
- v1_new->previous = v2;
- /* update the vertex count of the contour */
- contour->vertex_cnt += hole->vertex_cnt + 2;
- /* remove the INTERIOR contour */
- contour->next = hole->next;
- if (hole->next != NULL)
- hole->next->previous = contour;
- free(hole);
- /* update tobj structure */
- --(tobj->contour_cnt);
- if (contour->last_vertex == v1)
- contour->last_vertex = v1_new;
- /* mark two vertices with edge_flag */
- v2->edge_flag = GL_FALSE;
- v1->edge_flag = GL_FALSE;
- return GLU_NO_ERROR;
-}
+++ /dev/null
-
-/*
- * Mesa 3-D graphics library
- * Version: 3.3
- * Copyright (C) 1995-2000 Brian Paul
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-
-#ifdef PC_HEADER
-#include "all.h"
-#else
-#include <stdio.h>
-#include <string.h>
-#include <math.h>
-#include "gluP.h"
-#endif
-
-
-/*
- * This code was contributed by Marc Buffat (buffat@mecaflu.ec-lyon.fr).
- * Thanks Marc!!!
- */
-
-
-
-/* implementation de gluProject et gluUnproject */
-/* M. Buffat 17/2/95 */
-
-
-
-/*
- * Transform a point (column vector) by a 4x4 matrix. I.e. out = m * in
- * Input: m - the 4x4 matrix
- * in - the 4x1 vector
- * Output: out - the resulting 4x1 vector.
- */
-static void
-transform_point(GLdouble out[4], const GLdouble m[16], const GLdouble in[4])
-{
-#define M(row,col) m[col*4+row]
- out[0] =
- M(0, 0) * in[0] + M(0, 1) * in[1] + M(0, 2) * in[2] + M(0, 3) * in[3];
- out[1] =
- M(1, 0) * in[0] + M(1, 1) * in[1] + M(1, 2) * in[2] + M(1, 3) * in[3];
- out[2] =
- M(2, 0) * in[0] + M(2, 1) * in[1] + M(2, 2) * in[2] + M(2, 3) * in[3];
- out[3] =
- M(3, 0) * in[0] + M(3, 1) * in[1] + M(3, 2) * in[2] + M(3, 3) * in[3];
-#undef M
-}
-
-
-
-
-/*
- * Perform a 4x4 matrix multiplication (product = a x b).
- * Input: a, b - matrices to multiply
- * Output: product - product of a and b
- */
-static void
-matmul(GLdouble * product, const GLdouble * a, const GLdouble * b)
-{
- /* This matmul was contributed by Thomas Malik */
- GLdouble temp[16];
- GLint i;
-
-#define A(row,col) a[(col<<2)+row]
-#define B(row,col) b[(col<<2)+row]
-#define T(row,col) temp[(col<<2)+row]
-
- /* i-te Zeile */
- for (i = 0; i < 4; i++) {
- T(i, 0) =
- A(i, 0) * B(0, 0) + A(i, 1) * B(1, 0) + A(i, 2) * B(2, 0) + A(i,
- 3) *
- B(3, 0);
- T(i, 1) =
- A(i, 0) * B(0, 1) + A(i, 1) * B(1, 1) + A(i, 2) * B(2, 1) + A(i,
- 3) *
- B(3, 1);
- T(i, 2) =
- A(i, 0) * B(0, 2) + A(i, 1) * B(1, 2) + A(i, 2) * B(2, 2) + A(i,
- 3) *
- B(3, 2);
- T(i, 3) =
- A(i, 0) * B(0, 3) + A(i, 1) * B(1, 3) + A(i, 2) * B(2, 3) + A(i,
- 3) *
- B(3, 3);
- }
-
-#undef A
-#undef B
-#undef T
- MEMCPY(product, temp, 16 * sizeof(GLdouble));
-}
-
-
-
-/*
- * Compute inverse of 4x4 transformation matrix.
- * Code contributed by Jacques Leroy jle@star.be
- * Return GL_TRUE for success, GL_FALSE for failure (singular matrix)
- */
-static GLboolean
-invert_matrix(const GLdouble * m, GLdouble * out)
-{
-/* NB. OpenGL Matrices are COLUMN major. */
-#define SWAP_ROWS(a, b) { GLdouble *_tmp = a; (a)=(b); (b)=_tmp; }
-#define MAT(m,r,c) (m)[(c)*4+(r)]
-
- GLdouble wtmp[4][8];
- GLdouble m0, m1, m2, m3, s;
- GLdouble *r0, *r1, *r2, *r3;
-
- r0 = wtmp[0], r1 = wtmp[1], r2 = wtmp[2], r3 = wtmp[3];
-
- r0[0] = MAT(m, 0, 0), r0[1] = MAT(m, 0, 1),
- r0[2] = MAT(m, 0, 2), r0[3] = MAT(m, 0, 3),
- r0[4] = 1.0, r0[5] = r0[6] = r0[7] = 0.0,
- r1[0] = MAT(m, 1, 0), r1[1] = MAT(m, 1, 1),
- r1[2] = MAT(m, 1, 2), r1[3] = MAT(m, 1, 3),
- r1[5] = 1.0, r1[4] = r1[6] = r1[7] = 0.0,
- r2[0] = MAT(m, 2, 0), r2[1] = MAT(m, 2, 1),
- r2[2] = MAT(m, 2, 2), r2[3] = MAT(m, 2, 3),
- r2[6] = 1.0, r2[4] = r2[5] = r2[7] = 0.0,
- r3[0] = MAT(m, 3, 0), r3[1] = MAT(m, 3, 1),
- r3[2] = MAT(m, 3, 2), r3[3] = MAT(m, 3, 3),
- r3[7] = 1.0, r3[4] = r3[5] = r3[6] = 0.0;
-
- /* choose pivot - or die */
- if (fabs(r3[0]) > fabs(r2[0]))
- SWAP_ROWS(r3, r2);
- if (fabs(r2[0]) > fabs(r1[0]))
- SWAP_ROWS(r2, r1);
- if (fabs(r1[0]) > fabs(r0[0]))
- SWAP_ROWS(r1, r0);
- if (0.0 == r0[0])
- return GL_FALSE;
-
- /* eliminate first variable */
- m1 = r1[0] / r0[0];
- m2 = r2[0] / r0[0];
- m3 = r3[0] / r0[0];
- s = r0[1];
- r1[1] -= m1 * s;
- r2[1] -= m2 * s;
- r3[1] -= m3 * s;
- s = r0[2];
- r1[2] -= m1 * s;
- r2[2] -= m2 * s;
- r3[2] -= m3 * s;
- s = r0[3];
- r1[3] -= m1 * s;
- r2[3] -= m2 * s;
- r3[3] -= m3 * s;
- s = r0[4];
- if (s != 0.0) {
- r1[4] -= m1 * s;
- r2[4] -= m2 * s;
- r3[4] -= m3 * s;
- }
- s = r0[5];
- if (s != 0.0) {
- r1[5] -= m1 * s;
- r2[5] -= m2 * s;
- r3[5] -= m3 * s;
- }
- s = r0[6];
- if (s != 0.0) {
- r1[6] -= m1 * s;
- r2[6] -= m2 * s;
- r3[6] -= m3 * s;
- }
- s = r0[7];
- if (s != 0.0) {
- r1[7] -= m1 * s;
- r2[7] -= m2 * s;
- r3[7] -= m3 * s;
- }
-
- /* choose pivot - or die */
- if (fabs(r3[1]) > fabs(r2[1]))
- SWAP_ROWS(r3, r2);
- if (fabs(r2[1]) > fabs(r1[1]))
- SWAP_ROWS(r2, r1);
- if (0.0 == r1[1])
- return GL_FALSE;
-
- /* eliminate second variable */
- m2 = r2[1] / r1[1];
- m3 = r3[1] / r1[1];
- r2[2] -= m2 * r1[2];
- r3[2] -= m3 * r1[2];
- r2[3] -= m2 * r1[3];
- r3[3] -= m3 * r1[3];
- s = r1[4];
- if (0.0 != s) {
- r2[4] -= m2 * s;
- r3[4] -= m3 * s;
- }
- s = r1[5];
- if (0.0 != s) {
- r2[5] -= m2 * s;
- r3[5] -= m3 * s;
- }
- s = r1[6];
- if (0.0 != s) {
- r2[6] -= m2 * s;
- r3[6] -= m3 * s;
- }
- s = r1[7];
- if (0.0 != s) {
- r2[7] -= m2 * s;
- r3[7] -= m3 * s;
- }
-
- /* choose pivot - or die */
- if (fabs(r3[2]) > fabs(r2[2]))
- SWAP_ROWS(r3, r2);
- if (0.0 == r2[2])
- return GL_FALSE;
-
- /* eliminate third variable */
- m3 = r3[2] / r2[2];
- r3[3] -= m3 * r2[3], r3[4] -= m3 * r2[4],
- r3[5] -= m3 * r2[5], r3[6] -= m3 * r2[6], r3[7] -= m3 * r2[7];
-
- /* last check */
- if (0.0 == r3[3])
- return GL_FALSE;
-
- s = 1.0 / r3[3]; /* now back substitute row 3 */
- r3[4] *= s;
- r3[5] *= s;
- r3[6] *= s;
- r3[7] *= s;
-
- m2 = r2[3]; /* now back substitute row 2 */
- s = 1.0 / r2[2];
- r2[4] = s * (r2[4] - r3[4] * m2), r2[5] = s * (r2[5] - r3[5] * m2),
- r2[6] = s * (r2[6] - r3[6] * m2), r2[7] = s * (r2[7] - r3[7] * m2);
- m1 = r1[3];
- r1[4] -= r3[4] * m1, r1[5] -= r3[5] * m1,
- r1[6] -= r3[6] * m1, r1[7] -= r3[7] * m1;
- m0 = r0[3];
- r0[4] -= r3[4] * m0, r0[5] -= r3[5] * m0,
- r0[6] -= r3[6] * m0, r0[7] -= r3[7] * m0;
-
- m1 = r1[2]; /* now back substitute row 1 */
- s = 1.0 / r1[1];
- r1[4] = s * (r1[4] - r2[4] * m1), r1[5] = s * (r1[5] - r2[5] * m1),
- r1[6] = s * (r1[6] - r2[6] * m1), r1[7] = s * (r1[7] - r2[7] * m1);
- m0 = r0[2];
- r0[4] -= r2[4] * m0, r0[5] -= r2[5] * m0,
- r0[6] -= r2[6] * m0, r0[7] -= r2[7] * m0;
-
- m0 = r0[1]; /* now back substitute row 0 */
- s = 1.0 / r0[0];
- r0[4] = s * (r0[4] - r1[4] * m0), r0[5] = s * (r0[5] - r1[5] * m0),
- r0[6] = s * (r0[6] - r1[6] * m0), r0[7] = s * (r0[7] - r1[7] * m0);
-
- MAT(out, 0, 0) = r0[4];
- MAT(out, 0, 1) = r0[5], MAT(out, 0, 2) = r0[6];
- MAT(out, 0, 3) = r0[7], MAT(out, 1, 0) = r1[4];
- MAT(out, 1, 1) = r1[5], MAT(out, 1, 2) = r1[6];
- MAT(out, 1, 3) = r1[7], MAT(out, 2, 0) = r2[4];
- MAT(out, 2, 1) = r2[5], MAT(out, 2, 2) = r2[6];
- MAT(out, 2, 3) = r2[7], MAT(out, 3, 0) = r3[4];
- MAT(out, 3, 1) = r3[5], MAT(out, 3, 2) = r3[6];
- MAT(out, 3, 3) = r3[7];
-
- return GL_TRUE;
-
-#undef MAT
-#undef SWAP_ROWS
-}
-
-
-
-/* projection du point (objx,objy,obz) sur l'ecran (winx,winy,winz) */
-GLint GLAPIENTRY
-gluProject(GLdouble objx, GLdouble objy, GLdouble objz,
- const GLdouble model[16], const GLdouble proj[16],
- const GLint viewport[4],
- GLdouble * winx, GLdouble * winy, GLdouble * winz)
-{
- /* matrice de transformation */
- GLdouble in[4], out[4];
-
- /* initilise la matrice et le vecteur a transformer */
- in[0] = objx;
- in[1] = objy;
- in[2] = objz;
- in[3] = 1.0;
- transform_point(out, model, in);
- transform_point(in, proj, out);
-
- /* d'ou le resultat normalise entre -1 et 1 */
- if (in[3] == 0.0)
- return GL_FALSE;
-
- in[0] /= in[3];
- in[1] /= in[3];
- in[2] /= in[3];
-
- /* en coordonnees ecran */
- *winx = viewport[0] + (1 + in[0]) * viewport[2] / 2;
- *winy = viewport[1] + (1 + in[1]) * viewport[3] / 2;
- /* entre 0 et 1 suivant z */
- *winz = (1 + in[2]) / 2;
- return GL_TRUE;
-}
-
-
-
-/* transformation du point ecran (winx,winy,winz) en point objet */
-GLint GLAPIENTRY
-gluUnProject(GLdouble winx, GLdouble winy, GLdouble winz,
- const GLdouble model[16], const GLdouble proj[16],
- const GLint viewport[4],
- GLdouble * objx, GLdouble * objy, GLdouble * objz)
-{
- /* matrice de transformation */
- GLdouble m[16], A[16];
- GLdouble in[4], out[4];
-
- /* transformation coordonnees normalisees entre -1 et 1 */
- in[0] = (winx - viewport[0]) * 2 / viewport[2] - 1.0;
- in[1] = (winy - viewport[1]) * 2 / viewport[3] - 1.0;
- in[2] = 2 * winz - 1.0;
- in[3] = 1.0;
-
- /* calcul transformation inverse */
- matmul(A, proj, model);
- if (!invert_matrix(A, m))
- return GL_FALSE;
-
- /* d'ou les coordonnees objets */
- transform_point(out, m, in);
- if (out[3] == 0.0)
- return GL_FALSE;
- *objx = out[0] / out[3];
- *objy = out[1] / out[3];
- *objz = out[2] / out[3];
- return GL_TRUE;
-}
-
-
-/*
- * New in GLU 1.3
- * This is like gluUnProject but also takes near and far DepthRange values.
- */
-#ifdef GLU_VERSION_1_3
-GLint GLAPIENTRY
-gluUnProject4(GLdouble winx, GLdouble winy, GLdouble winz, GLdouble clipw,
- const GLdouble modelMatrix[16],
- const GLdouble projMatrix[16],
- const GLint viewport[4],
- GLclampd nearZ, GLclampd farZ,
- GLdouble * objx, GLdouble * objy, GLdouble * objz,
- GLdouble * objw)
-{
- /* matrice de transformation */
- GLdouble m[16], A[16];
- GLdouble in[4], out[4];
- GLdouble z = nearZ + winz * (farZ - nearZ);
-
- /* transformation coordonnees normalisees entre -1 et 1 */
- in[0] = (winx - viewport[0]) * 2 / viewport[2] - 1.0;
- in[1] = (winy - viewport[1]) * 2 / viewport[3] - 1.0;
- in[2] = 2.0 * z - 1.0;
- in[3] = clipw;
-
- /* calcul transformation inverse */
- matmul(A, projMatrix, modelMatrix);
- if (!invert_matrix(A, m))
- return GL_FALSE;
-
- /* d'ou les coordonnees objets */
- transform_point(out, m, in);
- if (out[3] == 0.0)
- return GL_FALSE;
- *objx = out[0] / out[3];
- *objy = out[1] / out[3];
- *objz = out[2] / out[3];
- *objw = out[3];
- return GL_TRUE;
-}
-#endif
+++ /dev/null
-
-/*
- * Mesa 3-D graphics library
- * Version: 3.3
- * Copyright (C) 1999-2000 Brian Paul
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-
-/* TODO:
- * texture coordinate support
- * flip normals according to orientation
- * there's still some inside/outside orientation bugs in possibly all
- * but the sphere function
- */
-
-
-#ifdef PC_HEADER
-#include "all.h"
-#else
-#include <math.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include "gluP.h"
-#endif
-
-
-
-#ifndef M_PI
-# define M_PI (3.1415926)
-#endif
-
-
-/*
- * Convert degrees to radians:
- */
-#define DEG_TO_RAD(A) ((A)*(M_PI/180.0))
-
-
-/*
- * Sin and Cos for degree angles:
- */
-#define SIND( A ) sin( (A)*(M_PI/180.0) )
-#define COSD( A) cos( (A)*(M_PI/180.0) )
-
-
-/*
- * Texture coordinates if texture flag is set
- */
-#define TXTR_COORD(x,y) if (qobj->TextureFlag) glTexCoord2f(x,y);
-
-
-
-struct GLUquadric
-{
- GLenum DrawStyle; /* GLU_FILL, LINE, SILHOUETTE, or POINT */
- GLenum Orientation; /* GLU_INSIDE or GLU_OUTSIDE */
- GLboolean TextureFlag; /* Generate texture coords? */
- GLenum Normals; /* GLU_NONE, GLU_FLAT, or GLU_SMOOTH */
- void (GLCALLBACK * ErrorFunc) (GLenum err); /* Error handler callback function */
-};
-
-
-
-/*
- * Process a GLU error.
- */
-static void
-quadric_error(GLUquadricObj * qobj, GLenum error, const char *msg)
-{
- /* Call the error call back function if any */
- if (qobj->ErrorFunc) {
- (*qobj->ErrorFunc) (error);
- }
- /* Print a message to stdout if MESA_DEBUG variable is defined */
- if (getenv("MESA_DEBUG")) {
- fprintf(stderr, "GLUError: %s: %s\n", (char *) gluErrorString(error),
- msg);
- }
-}
-
-
-
-
-GLUquadricObj *GLAPIENTRY
-gluNewQuadric(void)
-{
- GLUquadricObj *q;
-
- q = (GLUquadricObj *) malloc(sizeof(struct GLUquadric));
- if (q) {
- q->DrawStyle = GLU_FILL;
- q->Orientation = GLU_OUTSIDE;
- q->TextureFlag = GL_FALSE;
- q->Normals = GLU_SMOOTH;
- q->ErrorFunc = NULL;
- }
- return q;
-}
-
-
-
-void GLAPIENTRY
-gluDeleteQuadric(GLUquadricObj * state)
-{
- if (state) {
- free((void *) state);
- }
-}
-
-
-
-/*
- * Set the drawing style to be GLU_FILL, GLU_LINE, GLU_SILHOUETTE,
- * or GLU_POINT.
- */
-void GLAPIENTRY
-gluQuadricDrawStyle(GLUquadricObj * quadObject, GLenum drawStyle)
-{
- if (quadObject && (drawStyle == GLU_FILL || drawStyle == GLU_LINE
- || drawStyle == GLU_SILHOUETTE
- || drawStyle == GLU_POINT)) {
- quadObject->DrawStyle = drawStyle;
- }
- else {
- quadric_error(quadObject, GLU_INVALID_ENUM, "qluQuadricDrawStyle");
- }
-}
-
-
-
-/*
- * Set the orientation to GLU_INSIDE or GLU_OUTSIDE.
- */
-void GLAPIENTRY
-gluQuadricOrientation(GLUquadricObj * quadObject, GLenum orientation)
-{
- if (quadObject
- && (orientation == GLU_INSIDE || orientation == GLU_OUTSIDE)) {
- quadObject->Orientation = orientation;
- }
- else {
- quadric_error(quadObject, GLU_INVALID_ENUM, "qluQuadricOrientation");
- }
-}
-
-
-
-/*
- * Set the error handler callback function.
- */
-void GLAPIENTRY
-gluQuadricCallback(GLUquadricObj * qobj,
- GLenum which, void (GLCALLBACK * fn) ())
-{
- /*
- * UGH, this is a mess! I thought ANSI was a standard.
- */
- if (qobj && which == GLU_ERROR) {
-#ifdef __CYGWIN32__
- qobj->ErrorFunc = (void (GLCALLBACKPCAST) (GLenum)) fn;
-#elif defined(OPENSTEP)
- qobj->ErrorFunc = (void (*)(GLenum)) fn;
-#elif defined(_WIN32)
- qobj->ErrorFunc = (void (GLCALLBACK *) (int)) fn;
-#elif defined(__STORM__)
- qobj->ErrorFunc = (void (GLCALLBACK *) (GLenum)) fn;
-#elif defined(__BEOS__)
- qobj->ErrorFunc = (void (*)(GLenum)) fn;
-#else
- qobj->ErrorFunc = (void (GLCALLBACK *) ()) fn;
-#endif
- }
-}
-
-
-void GLAPIENTRY
-gluQuadricNormals(GLUquadricObj * quadObject, GLenum normals)
-{
- if (quadObject
- && (normals == GLU_NONE || normals == GLU_FLAT
- || normals == GLU_SMOOTH)) {
- quadObject->Normals = normals;
- }
-}
-
-
-void GLAPIENTRY
-gluQuadricTexture(GLUquadricObj * quadObject, GLboolean textureCoords)
-{
- if (quadObject) {
- quadObject->TextureFlag = textureCoords;
- }
-}
-
-
-
-
-/*
- * Call glNormal3f after scaling normal to unit length.
- */
-static void
-normal3f(GLfloat x, GLfloat y, GLfloat z)
-{
- GLdouble mag;
-
- mag = sqrt(x * x + y * y + z * z);
- if (mag > 0.00001F) {
- x /= mag;
- y /= mag;
- z /= mag;
- }
- glNormal3f(x, y, z);
-}
-
-
-
-void GLAPIENTRY
-gluCylinder(GLUquadricObj * qobj,
- GLdouble baseRadius, GLdouble topRadius,
- GLdouble height, GLint slices, GLint stacks)
-{
- GLdouble da, r, dr, dz;
- GLfloat x, y, z, nz, nsign;
- GLint i, j;
-
- if (qobj->Orientation == GLU_INSIDE) {
- nsign = -1.0;
- }
- else {
- nsign = 1.0;
- }
-
- da = 2.0 * M_PI / slices;
- dr = (topRadius - baseRadius) / stacks;
- dz = height / stacks;
- nz = (baseRadius - topRadius) / height; /* Z component of normal vectors */
-
- if (qobj->DrawStyle == GLU_POINT) {
- glBegin(GL_POINTS);
- for (i = 0; i < slices; i++) {
- x = cos(i * da);
- y = sin(i * da);
- normal3f(x * nsign, y * nsign, nz * nsign);
-
- z = 0.0;
- r = baseRadius;
- for (j = 0; j <= stacks; j++) {
- glVertex3f(x * r, y * r, z);
- z += dz;
- r += dr;
- }
- }
- glEnd();
- }
- else if (qobj->DrawStyle == GLU_LINE || qobj->DrawStyle == GLU_SILHOUETTE) {
- /* Draw rings */
- if (qobj->DrawStyle == GLU_LINE) {
- z = 0.0;
- r = baseRadius;
- for (j = 0; j <= stacks; j++) {
- glBegin(GL_LINE_LOOP);
- for (i = 0; i < slices; i++) {
- x = cos(i * da);
- y = sin(i * da);
- normal3f(x * nsign, y * nsign, nz * nsign);
- glVertex3f(x * r, y * r, z);
- }
- glEnd();
- z += dz;
- r += dr;
- }
- }
- else {
- /* draw one ring at each end */
- if (baseRadius != 0.0) {
- glBegin(GL_LINE_LOOP);
- for (i = 0; i < slices; i++) {
- x = cos(i * da);
- y = sin(i * da);
- normal3f(x * nsign, y * nsign, nz * nsign);
- glVertex3f(x * baseRadius, y * baseRadius, 0.0);
- }
- glEnd();
- glBegin(GL_LINE_LOOP);
- for (i = 0; i < slices; i++) {
- x = cos(i * da);
- y = sin(i * da);
- normal3f(x * nsign, y * nsign, nz * nsign);
- glVertex3f(x * topRadius, y * topRadius, height);
- }
- glEnd();
- }
- }
- /* draw length lines */
- glBegin(GL_LINES);
- for (i = 0; i < slices; i++) {
- x = cos(i * da);
- y = sin(i * da);
- normal3f(x * nsign, y * nsign, nz * nsign);
- glVertex3f(x * baseRadius, y * baseRadius, 0.0);
- glVertex3f(x * topRadius, y * topRadius, height);
- }
- glEnd();
- }
- else if (qobj->DrawStyle == GLU_FILL) {
- GLfloat ds = 1.0 / slices;
- GLfloat dt = 1.0 / stacks;
- GLfloat t = 0.0;
- z = 0.0;
- r = baseRadius;
- for (j = 0; j < stacks; j++) {
- GLfloat s = 0.0;
- glBegin(GL_QUAD_STRIP);
- for (i = 0; i <= slices; i++) {
- GLfloat x, y;
- if (i == slices) {
- x = sin(0.0);
- y = cos(0.0);
- }
- else {
- x = sin(i * da);
- y = cos(i * da);
- }
- if (nsign == 1.0) {
- normal3f(x * nsign, y * nsign, nz * nsign);
- TXTR_COORD(s, t);
- glVertex3f(x * r, y * r, z);
- normal3f(x * nsign, y * nsign, nz * nsign);
- TXTR_COORD(s, t + dt);
- glVertex3f(x * (r + dr), y * (r + dr), z + dz);
- }
- else {
- normal3f(x * nsign, y * nsign, nz * nsign);
- TXTR_COORD(s, t);
- glVertex3f(x * r, y * r, z);
- normal3f(x * nsign, y * nsign, nz * nsign);
- TXTR_COORD(s, t + dt);
- glVertex3f(x * (r + dr), y * (r + dr), z + dz);
- }
- s += ds;
- } /* for slices */
- glEnd();
- r += dr;
- t += dt;
- z += dz;
- } /* for stacks */
- }
-}
-
-
-
-
-
-void GLAPIENTRY
-gluSphere(GLUquadricObj * qobj, GLdouble radius, GLint slices, GLint stacks)
-{
- GLfloat rho, drho, theta, dtheta;
- GLfloat x, y, z;
- GLfloat s, t, ds, dt;
- GLint i, j, imin, imax;
- GLboolean normals;
- GLfloat nsign;
-
- if (qobj->Normals == GLU_NONE) {
- normals = GL_FALSE;
- }
- else {
- normals = GL_TRUE;
- }
- if (qobj->Orientation == GLU_INSIDE) {
- nsign = -1.0;
- }
- else {
- nsign = 1.0;
- }
-
- drho = M_PI / (GLfloat) stacks;
- dtheta = 2.0 * M_PI / (GLfloat) slices;
-
- /* texturing: s goes from 0.0/0.25/0.5/0.75/1.0 at +y/+x/-y/-x/+y axis */
- /* t goes from -1.0/+1.0 at z = -radius/+radius (linear along longitudes) */
- /* cannot use triangle fan on texturing (s coord. at top/bottom tip varies) */
-
- if (qobj->DrawStyle == GLU_FILL) {
- if (!qobj->TextureFlag) {
- /* draw +Z end as a triangle fan */
- glBegin(GL_TRIANGLE_FAN);
- glNormal3f(0.0, 0.0, 1.0);
- glVertex3f(0.0, 0.0, nsign * radius);
- for (j = 0; j <= slices; j++) {
- theta = (j == slices) ? 0.0 : j * dtheta;
- x = -sin(theta) * sin(drho);
- y = cos(theta) * sin(drho);
- z = nsign * cos(drho);
- if (normals)
- glNormal3f(x * nsign, y * nsign, z * nsign);
- glVertex3f(x * radius, y * radius, z * radius);
- }
- glEnd();
- }
-
- ds = 1.0 / slices;
- dt = 1.0 / stacks;
- t = 1.0; /* because loop now runs from 0 */
- if (qobj->TextureFlag) {
- imin = 0;
- imax = stacks;
- }
- else {
- imin = 1;
- imax = stacks - 1;
- }
-
- /* draw intermediate stacks as quad strips */
- for (i = imin; i < imax; i++) {
- rho = i * drho;
- glBegin(GL_QUAD_STRIP);
- s = 0.0;
- for (j = 0; j <= slices; j++) {
- theta = (j == slices) ? 0.0 : j * dtheta;
- x = -sin(theta) * sin(rho);
- y = cos(theta) * sin(rho);
- z = nsign * cos(rho);
- if (normals)
- glNormal3f(x * nsign, y * nsign, z * nsign);
- TXTR_COORD(s, t);
- glVertex3f(x * radius, y * radius, z * radius);
- x = -sin(theta) * sin(rho + drho);
- y = cos(theta) * sin(rho + drho);
- z = nsign * cos(rho + drho);
- if (normals)
- glNormal3f(x * nsign, y * nsign, z * nsign);
- TXTR_COORD(s, t - dt);
- s += ds;
- glVertex3f(x * radius, y * radius, z * radius);
- }
- glEnd();
- t -= dt;
- }
-
- if (!qobj->TextureFlag) {
- /* draw -Z end as a triangle fan */
- glBegin(GL_TRIANGLE_FAN);
- glNormal3f(0.0, 0.0, -1.0);
- glVertex3f(0.0, 0.0, -radius * nsign);
- rho = M_PI - drho;
- s = 1.0;
- t = dt;
- for (j = slices; j >= 0; j--) {
- theta = (j == slices) ? 0.0 : j * dtheta;
- x = -sin(theta) * sin(rho);
- y = cos(theta) * sin(rho);
- z = nsign * cos(rho);
- if (normals)
- glNormal3f(x * nsign, y * nsign, z * nsign);
- s -= ds;
- glVertex3f(x * radius, y * radius, z * radius);
- }
- glEnd();
- }
- }
- else if (qobj->DrawStyle == GLU_LINE || qobj->DrawStyle == GLU_SILHOUETTE) {
- /* draw stack lines */
- for (i = 1; i < stacks; i++) { /* stack line at i==stacks-1 was missing here */
- rho = i * drho;
- glBegin(GL_LINE_LOOP);
- for (j = 0; j < slices; j++) {
- theta = j * dtheta;
- x = cos(theta) * sin(rho);
- y = sin(theta) * sin(rho);
- z = cos(rho);
- if (normals)
- glNormal3f(x * nsign, y * nsign, z * nsign);
- glVertex3f(x * radius, y * radius, z * radius);
- }
- glEnd();
- }
- /* draw slice lines */
- for (j = 0; j < slices; j++) {
- theta = j * dtheta;
- glBegin(GL_LINE_STRIP);
- for (i = 0; i <= stacks; i++) {
- rho = i * drho;
- x = cos(theta) * sin(rho);
- y = sin(theta) * sin(rho);
- z = cos(rho);
- if (normals)
- glNormal3f(x * nsign, y * nsign, z * nsign);
- glVertex3f(x * radius, y * radius, z * radius);
- }
- glEnd();
- }
- }
- else if (qobj->DrawStyle == GLU_POINT) {
- /* top and bottom-most points */
- glBegin(GL_POINTS);
- if (normals)
- glNormal3f(0.0, 0.0, nsign);
- glVertex3d(0.0, 0.0, radius);
- if (normals)
- glNormal3f(0.0, 0.0, -nsign);
- glVertex3d(0.0, 0.0, -radius);
-
- /* loop over stacks */
- for (i = 1; i < stacks - 1; i++) {
- rho = i * drho;
- for (j = 0; j < slices; j++) {
- theta = j * dtheta;
- x = cos(theta) * sin(rho);
- y = sin(theta) * sin(rho);
- z = cos(rho);
- if (normals)
- glNormal3f(x * nsign, y * nsign, z * nsign);
- glVertex3f(x * radius, y * radius, z * radius);
- }
- }
- glEnd();
- }
-
-}
-
-
-
-void GLAPIENTRY
-gluDisk(GLUquadricObj * qobj,
- GLdouble innerRadius, GLdouble outerRadius, GLint slices, GLint loops)
-{
- GLfloat da, dr;
-#if 0
- GLdouble a, da;
- GLfloat r, dr;
- GLfloat x, y;
- GLfloat r1, r2, dtc;
- GLint s, l;
-#endif
-
- /* Normal vectors */
- if (qobj->Normals != GLU_NONE) {
- if (qobj->Orientation == GLU_OUTSIDE) {
- glNormal3f(0.0, 0.0, +1.0);
- }
- else {
- glNormal3f(0.0, 0.0, -1.0);
- }
- }
-
- da = 2.0 * M_PI / slices;
- dr = (outerRadius - innerRadius) / (GLfloat) loops;
-
- switch (qobj->DrawStyle) {
- case GLU_FILL:
- {
- /* texture of a gluDisk is a cut out of the texture unit square
- * x, y in [-outerRadius, +outerRadius]; s, t in [0, 1]
- * (linear mapping)
- */
- GLfloat dtc = 2.0f * outerRadius;
- GLfloat sa, ca;
- GLfloat r1 = innerRadius;
- GLint l;
- for (l = 0; l < loops; l++) {
- GLfloat r2 = r1 + dr;
- if (qobj->Orientation == GLU_OUTSIDE) {
- GLint s;
- glBegin(GL_QUAD_STRIP);
- for (s = 0; s <= slices; s++) {
- GLfloat a;
- if (s == slices)
- a = 0.0;
- else
- a = s * da;
- sa = sin(a);
- ca = cos(a);
- TXTR_COORD(0.5 + sa * r2 / dtc, 0.5 + ca * r2 / dtc);
- glVertex2f(r2 * sa, r2 * ca);
- TXTR_COORD(0.5 + sa * r1 / dtc, 0.5 + ca * r1 / dtc);
- glVertex2f(r1 * sa, r1 * ca);
- }
- glEnd();
- }
- else {
- GLint s;
- glBegin(GL_QUAD_STRIP);
- for (s = slices; s >= 0; s--) {
- GLfloat a;
- if (s == slices)
- a = 0.0;
- else
- a = s * da;
- sa = sin(a);
- ca = cos(a);
- TXTR_COORD(0.5 - sa * r2 / dtc, 0.5 + ca * r2 / dtc);
- glVertex2f(r2 * sa, r2 * ca);
- TXTR_COORD(0.5 - sa * r1 / dtc, 0.5 + ca * r1 / dtc);
- glVertex2f(r1 * sa, r1 * ca);
- }
- glEnd();
- }
- r1 = r2;
- }
- break;
- }
- case GLU_LINE:
- {
- GLint l, s;
- /* draw loops */
- for (l = 0; l <= loops; l++) {
- GLfloat r = innerRadius + l * dr;
- glBegin(GL_LINE_LOOP);
- for (s = 0; s < slices; s++) {
- GLfloat a = s * da;
- glVertex2f(r * sin(a), r * cos(a));
- }
- glEnd();
- }
- /* draw spokes */
- for (s = 0; s < slices; s++) {
- GLfloat a = s * da;
- GLfloat x = sin(a);
- GLfloat y = cos(a);
- glBegin(GL_LINE_STRIP);
- for (l = 0; l <= loops; l++) {
- GLfloat r = innerRadius + l * dr;
- glVertex2f(r * x, r * y);
- }
- glEnd();
- }
- break;
- }
- case GLU_POINT:
- {
- GLint s;
- glBegin(GL_POINTS);
- for (s = 0; s < slices; s++) {
- GLfloat a = s * da;
- GLfloat x = sin(a);
- GLfloat y = cos(a);
- GLint l;
- for (l = 0; l <= loops; l++) {
- GLfloat r = innerRadius * l * dr;
- glVertex2f(r * x, r * y);
- }
- }
- glEnd();
- break;
- }
- case GLU_SILHOUETTE:
- {
- if (innerRadius != 0.0) {
- GLfloat a;
- glBegin(GL_LINE_LOOP);
- for (a = 0.0; a < 2.0 * M_PI; a += da) {
- GLfloat x = innerRadius * sin(a);
- GLfloat y = innerRadius * cos(a);
- glVertex2f(x, y);
- }
- glEnd();
- }
- {
- GLfloat a;
- glBegin(GL_LINE_LOOP);
- for (a = 0; a < 2.0 * M_PI; a += da) {
- GLfloat x = outerRadius * sin(a);
- GLfloat y = outerRadius * cos(a);
- glVertex2f(x, y);
- }
- glEnd();
- }
- break;
- }
- default:
- abort();
- }
-}
-
-
-
-void GLAPIENTRY
-gluPartialDisk(GLUquadricObj * qobj, GLdouble innerRadius,
- GLdouble outerRadius, GLint slices, GLint loops,
- GLdouble startAngle, GLdouble sweepAngle)
-{
- if (qobj->Normals != GLU_NONE) {
- if (qobj->Orientation == GLU_OUTSIDE) {
- glNormal3f(0.0, 0.0, +1.0);
- }
- else {
- glNormal3f(0.0, 0.0, -1.0);
- }
- }
-
- if (qobj->DrawStyle == GLU_POINT) {
- GLint loop, slice;
- GLdouble radius, delta_radius;
- GLdouble angle, delta_angle;
- delta_radius = (outerRadius - innerRadius) / (loops - 1);
- delta_angle = DEG_TO_RAD((sweepAngle) / (slices - 1));
- glBegin(GL_POINTS);
- radius = innerRadius;
- for (loop = 0; loop < loops; loop++) {
- angle = DEG_TO_RAD(startAngle);
- for (slice = 0; slice < slices; slice++) {
- glVertex2d(radius * sin(angle), radius * cos(angle));
- angle += delta_angle;
- }
- radius += delta_radius;
- }
- glEnd();
- }
- else if (qobj->DrawStyle == GLU_LINE) {
- GLint loop, slice;
- GLdouble radius, delta_radius;
- GLdouble angle, delta_angle;
- delta_radius = (outerRadius - innerRadius) / loops;
- delta_angle = DEG_TO_RAD(sweepAngle / slices);
- /* draw rings */
- radius = innerRadius;
- for (loop = 0; loop < loops; loop++) {
- angle = DEG_TO_RAD(startAngle);
- glBegin(GL_LINE_STRIP);
- for (slice = 0; slice <= slices; slice++) {
- glVertex2d(radius * sin(angle), radius * cos(angle));
- angle += delta_angle;
- }
- glEnd();
- radius += delta_radius;
- }
- /* draw spokes */
- angle = DEG_TO_RAD(startAngle);
- for (slice = 0; slice <= slices; slice++) {
- radius = innerRadius;
- glBegin(GL_LINE_STRIP);
- for (loop = 0; loop < loops; loop++) {
- glVertex2d(radius * sin(angle), radius * cos(angle));
- radius += delta_radius;
- }
- glEnd();
- angle += delta_angle;
- }
- }
- else if (qobj->DrawStyle == GLU_SILHOUETTE) {
- GLint slice;
- GLdouble angle, delta_angle;
- delta_angle = DEG_TO_RAD(sweepAngle / slices);
- /* draw outer ring */
- glBegin(GL_LINE_STRIP);
- angle = DEG_TO_RAD(startAngle);
- for (slice = 0; slice <= slices; slice++) {
- glVertex2d(outerRadius * sin(angle), outerRadius * cos(angle));
- angle += delta_angle;
- }
- glEnd();
- /* draw inner ring */
- if (innerRadius > 0.0) {
- glBegin(GL_LINE_STRIP);
- angle = DEG_TO_RAD(startAngle);
- for (slice = 0; slice < slices; slice++) {
- glVertex2d(innerRadius * sin(angle), innerRadius * cos(angle));
- angle += delta_angle;
- }
- glEnd();
- }
- /* draw spokes */
- if (sweepAngle < 360.0) {
- GLdouble stopAngle = startAngle + sweepAngle;
- glBegin(GL_LINES);
- glVertex2d(innerRadius * SIND(startAngle),
- innerRadius * COSD(startAngle));
- glVertex2d(outerRadius * SIND(startAngle),
- outerRadius * COSD(startAngle));
- glVertex2d(innerRadius * SIND(stopAngle),
- innerRadius * COSD(stopAngle));
- glVertex2d(outerRadius * SIND(stopAngle),
- outerRadius * COSD(stopAngle));
- glEnd();
- }
- }
- else if (qobj->DrawStyle == GLU_FILL) {
- GLint loop, slice;
- GLdouble radius, delta_radius;
- GLdouble angle, delta_angle;
- delta_radius = (outerRadius - innerRadius) / loops;
- delta_angle = DEG_TO_RAD(sweepAngle / slices);
- radius = innerRadius;
- for (loop = 0; loop < loops; loop++) {
- glBegin(GL_QUAD_STRIP);
- angle = DEG_TO_RAD(startAngle);
- for (slice = 0; slice <= slices; slice++) {
- if (qobj->Orientation == GLU_OUTSIDE) {
- glVertex2d((radius + delta_radius) * sin(angle),
- (radius + delta_radius) * cos(angle));
- glVertex2d(radius * sin(angle), radius * cos(angle));
- }
- else {
- glVertex2d(radius * sin(angle), radius * cos(angle));
- glVertex2d((radius + delta_radius) * sin(angle),
- (radius + delta_radius) * cos(angle));
- }
- angle += delta_angle;
- }
- glEnd();
- radius += delta_radius;
- }
- }
-}
+++ /dev/null
-
-/*
- * Mesa 3-D graphics library
- * Version: 3.3
- * Copyright (C) 1995-2000 Brian Paul
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-
-/*
- * This file is part of the polygon tesselation code contributed by
- * Bogdan Sikorski
- */
-
-
-#ifdef PC_HEADER
-#include "all.h"
-#else
-#include <math.h>
-#include <stdlib.h>
-#include "tess.h"
-#endif
-
-
-/*
- * This is ugly, but seems the easiest way to do things to make the
- * code work under YellowBox for Windows
- */
-#if defined(OPENSTEP) && defined(CALLBACK)
-#undef CALLBACK
-#define CALLBACK
-#endif
-
-
-static void delete_contours(GLUtriangulatorObj *);
-
-#ifdef __CYGWIN32__
-#define _CALLBACK
-#else
-#define _CALLBACK GLCALLBACK
-#endif
-
-
-static void
-init_callbacks(tess_callbacks * callbacks)
-{
- callbacks->begin = (void (_CALLBACK *) (GLenum)) 0;
- callbacks->edgeFlag = (void (_CALLBACK *) (GLboolean)) 0;
- callbacks->vertex = (void (_CALLBACK *) (void *)) 0;
- callbacks->end = (void (_CALLBACK *) (void)) 0;
- callbacks->error = (void (_CALLBACK *) (GLenum)) 0;
-}
-
-void
-tess_call_user_error(GLUtriangulatorObj * tobj, GLenum gluerr)
-{
- if (tobj->error == GLU_NO_ERROR)
- tobj->error = gluerr;
- if (tobj->callbacks.error != NULL)
- (tobj->callbacks.error) (gluerr);
-}
-
-GLUtriangulatorObj *GLAPIENTRY
-gluNewTess(void)
-{
- GLUtriangulatorObj *tobj;
-
- if ((tobj = (GLUtriangulatorObj *)
- malloc(sizeof(struct GLUtesselator))) == NULL)
- return NULL;
- tobj->contours = tobj->last_contour = NULL;
- init_callbacks(&tobj->callbacks);
- tobj->error = GLU_NO_ERROR;
- tobj->current_polygon = NULL;
- tobj->contour_cnt = 0;
- return tobj;
-}
-
-
-void GLAPIENTRY
-gluTessCallback(GLUtriangulatorObj * tobj, GLenum which,
- void (GLCALLBACK * fn) ())
-{
- switch (which) {
- case GLU_BEGIN:
- tobj->callbacks.begin = (void (_CALLBACK *) (GLenum)) fn;
- break;
- case GLU_EDGE_FLAG:
- tobj->callbacks.edgeFlag = (void (_CALLBACK *) (GLboolean)) fn;
- break;
- case GLU_VERTEX:
- tobj->callbacks.vertex = (void (_CALLBACK *) (void *)) fn;
- break;
- case GLU_END:
- tobj->callbacks.end = (void (_CALLBACK *) (void)) fn;
- break;
- case GLU_ERROR:
- tobj->callbacks.error = (void (_CALLBACK *) (GLenum)) fn;
- break;
- default:
- tobj->error = GLU_INVALID_ENUM;
- break;
- }
-}
-
-
-
-void GLAPIENTRY
-gluDeleteTess(GLUtriangulatorObj * tobj)
-{
- if (tobj->error == GLU_NO_ERROR && tobj->contour_cnt)
- /* was gluEndPolygon called? */
- tess_call_user_error(tobj, GLU_TESS_ERROR1);
- /* delete all internal structures */
- delete_contours(tobj);
- free(tobj);
-}
-
-
-void GLAPIENTRY
-gluBeginPolygon(GLUtriangulatorObj * tobj)
-{
-/*
- if(tobj->error!=GLU_NO_ERROR)
- return;
-*/
- tobj->error = GLU_NO_ERROR;
- if (tobj->current_polygon != NULL) {
- /* gluEndPolygon was not called */
- tess_call_user_error(tobj, GLU_TESS_ERROR1);
- /* delete all internal structures */
- delete_contours(tobj);
- }
- else {
- if ((tobj->current_polygon =
- (tess_polygon *) malloc(sizeof(tess_polygon))) == NULL) {
- tess_call_user_error(tobj, GLU_OUT_OF_MEMORY);
- return;
- }
- tobj->current_polygon->vertex_cnt = 0;
- tobj->current_polygon->vertices =
- tobj->current_polygon->last_vertex = NULL;
- }
-}
-
-
-void GLAPIENTRY
-gluEndPolygon(GLUtriangulatorObj * tobj)
-{
- /*tess_contour *contour_ptr; */
-
- /* there was an error */
- if (tobj->error != GLU_NO_ERROR)
- goto end;
-
- /* check if gluBeginPolygon was called */
- if (tobj->current_polygon == NULL) {
- tess_call_user_error(tobj, GLU_TESS_ERROR2);
- return;
- }
- tess_test_polygon(tobj);
- /* there was an error */
- if (tobj->error != GLU_NO_ERROR)
- goto end;
-
- /* any real contours? */
- if (tobj->contour_cnt == 0) {
- /* delete all internal structures */
- delete_contours(tobj);
- return;
- }
- tess_find_contour_hierarchies(tobj);
- /* there was an error */
- if (tobj->error != GLU_NO_ERROR)
- goto end;
-
- tess_handle_holes(tobj);
- /* there was an error */
- if (tobj->error != GLU_NO_ERROR)
- goto end;
-
- /* if no callbacks, nothing to do */
- if (tobj->callbacks.begin != NULL && tobj->callbacks.vertex != NULL &&
- tobj->callbacks.end != NULL) {
- if (tobj->callbacks.edgeFlag == NULL)
- tess_tesselate(tobj);
- else
- tess_tesselate_with_edge_flag(tobj);
- }
-
- end:
- /* delete all internal structures */
- delete_contours(tobj);
-}
-
-
-void GLAPIENTRY
-gluNextContour(GLUtriangulatorObj * tobj, GLenum type)
-{
- if (tobj->error != GLU_NO_ERROR)
- return;
- if (tobj->current_polygon == NULL) {
- tess_call_user_error(tobj, GLU_TESS_ERROR2);
- return;
- }
- /* first contour? */
- if (tobj->current_polygon->vertex_cnt)
- tess_test_polygon(tobj);
-}
-
-
-void GLAPIENTRY
-gluTessVertex(GLUtriangulatorObj * tobj, GLdouble v[3], void *data)
-{
- tess_polygon *polygon = tobj->current_polygon;
- tess_vertex *last_vertex_ptr;
-
- if (tobj->error != GLU_NO_ERROR)
- return;
- if (polygon == NULL) {
- tess_call_user_error(tobj, GLU_TESS_ERROR2);
- return;
- }
- last_vertex_ptr = polygon->last_vertex;
- if (last_vertex_ptr == NULL) {
- if ((last_vertex_ptr = (tess_vertex *)
- malloc(sizeof(tess_vertex))) == NULL) {
- tess_call_user_error(tobj, GLU_OUT_OF_MEMORY);
- return;
- }
- polygon->vertices = last_vertex_ptr;
- polygon->last_vertex = last_vertex_ptr;
- last_vertex_ptr->data = data;
- last_vertex_ptr->location[0] = v[0];
- last_vertex_ptr->location[1] = v[1];
- last_vertex_ptr->location[2] = v[2];
- last_vertex_ptr->next = NULL;
- last_vertex_ptr->previous = NULL;
- ++(polygon->vertex_cnt);
- }
- else {
- tess_vertex *vertex_ptr;
-
- /* same point twice? */
- if (fabs(last_vertex_ptr->location[0] - v[0]) < EPSILON &&
- fabs(last_vertex_ptr->location[1] - v[1]) < EPSILON &&
- fabs(last_vertex_ptr->location[2] - v[2]) < EPSILON) {
- tess_call_user_error(tobj, GLU_TESS_ERROR6);
- return;
- }
- if ((vertex_ptr = (tess_vertex *)
- malloc(sizeof(tess_vertex))) == NULL) {
- tess_call_user_error(tobj, GLU_OUT_OF_MEMORY);
- return;
- }
- vertex_ptr->data = data;
- vertex_ptr->location[0] = v[0];
- vertex_ptr->location[1] = v[1];
- vertex_ptr->location[2] = v[2];
- vertex_ptr->next = NULL;
- vertex_ptr->previous = last_vertex_ptr;
- ++(polygon->vertex_cnt);
- last_vertex_ptr->next = vertex_ptr;
- polygon->last_vertex = vertex_ptr;
- }
-}
-
-
-static void
-delete_contours(GLUtriangulatorObj * tobj)
-{
- tess_polygon *polygon = tobj->current_polygon;
- tess_contour *contour, *contour_tmp;
- tess_vertex *vertex, *vertex_tmp;
-
- /* remove current_polygon list - if exists due to detected error */
- if (polygon != NULL) {
- if (polygon->vertices) {
- for (vertex = polygon->vertices; vertex != polygon->last_vertex;) {
- vertex_tmp = vertex->next;
- free(vertex);
- vertex = vertex_tmp;
- }
- free(vertex);
- }
- free(polygon);
- tobj->current_polygon = NULL;
- }
- /* remove all contour data */
- for (contour = tobj->contours; contour != NULL;) {
- for (vertex = contour->vertices; vertex != contour->last_vertex;) {
- vertex_tmp = vertex->next;
- free(vertex);
- vertex = vertex_tmp;
- }
- free(vertex);
- contour_tmp = contour->next;
- free(contour);
- contour = contour_tmp;
- }
- tobj->contours = tobj->last_contour = NULL;
- tobj->contour_cnt = 0;
-}
-
-
-void GLAPIENTRY
-gluTessNormal(GLUtesselator *tess, GLdouble valueX, GLdouble valueY, GLdouble valueZ)
-{
- /* dummy function */
- (void) tess;
- (void) valueX;
- (void) valueY;
- (void) valueZ;
-}
+++ /dev/null
-
-/*
- * Mesa 3-D graphics library
- * Version: 3.3
- * Copyright (C) 1995-2000 Brian Paul
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-
-/*
- * This file is part of the polygon tesselation code contributed by
- * Bogdan Sikorski
- */
-
-
-#ifndef TESS_H
-#define TESS_H
-
-
-#include "gluP.h"
-
-#define EPSILON 1e-06 /* epsilon for double precision compares */
-
-typedef enum
-{
- OXY,
- OYZ,
- OXZ
-}
-projection_type;
-
-typedef struct callbacks_str
-{
- void (GLCALLBACK * begin) (GLenum mode);
- void (GLCALLBACK * edgeFlag) (GLboolean flag);
- void (GLCALLBACK * vertex) (GLvoid * v);
- void (GLCALLBACK * end) (void);
- void (GLCALLBACK * error) (GLenum err);
-}
-tess_callbacks;
-
-typedef struct vertex_str
-{
- void *data;
- GLdouble location[3];
- GLdouble x, y;
- GLboolean edge_flag;
- struct vertex_str *shadow_vertex;
- struct vertex_str *next, *previous;
-}
-tess_vertex;
-
-typedef struct contour_str
-{
- GLenum type;
- GLuint vertex_cnt;
- GLdouble area;
- GLenum orientation;
- struct vertex_str *vertices, *last_vertex;
- struct contour_str *next, *previous;
-}
-tess_contour;
-
-typedef struct polygon_str
-{
- GLuint vertex_cnt;
- GLdouble A, B, C, D;
- GLdouble area;
- GLenum orientation;
- struct vertex_str *vertices, *last_vertex;
-}
-tess_polygon;
-
-struct GLUtesselator
-{
- tess_contour *contours, *last_contour;
- GLuint contour_cnt;
- tess_callbacks callbacks;
- tess_polygon *current_polygon;
- GLenum error;
- GLdouble A, B, C, D;
- projection_type projection;
-};
-
-
-extern void tess_call_user_error(GLUtriangulatorObj *, GLenum);
-extern void tess_test_polygon(GLUtriangulatorObj *);
-extern void tess_find_contour_hierarchies(GLUtriangulatorObj *);
-extern void tess_handle_holes(GLUtriangulatorObj *);
-extern void tess_tesselate(GLUtriangulatorObj *);
-extern void tess_tesselate_with_edge_flag(GLUtriangulatorObj *);
-
-
-#endif
+++ /dev/null
-
-/*
- * Mesa 3-D graphics library
- * Version: 3.3
- * Copyright (C) 1995-2000 Brian Paul
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-
-/*
- * This file is part of the polygon tesselation code contributed by
- * Bogdan Sikorski
- */
-
-
-#ifdef PC_HEADER
-#include "all.h"
-#else
-#include <stdlib.h>
-#include <math.h>
-#include "tess.h"
-#endif
-
-
-
-static GLboolean edge_flag;
-
-static void emit_triangle(GLUtriangulatorObj *, tess_vertex *,
- tess_vertex *, tess_vertex *);
-
-static void emit_triangle_with_edge_flag(GLUtriangulatorObj *,
- tess_vertex *, GLboolean,
- tess_vertex *, GLboolean,
- tess_vertex *, GLboolean);
-
-static GLdouble
-twice_the_triangle_area(tess_vertex * va, tess_vertex * vb, tess_vertex * vc)
-{
- return (vb->x - va->x) * (vc->y - va->y) - (vb->y - va->y) * (vc->x -
- va->x);
-}
-
-static GLboolean
-left(GLdouble A, GLdouble B, GLdouble C, GLdouble x, GLdouble y)
-{
- if (A * x + B * y + C > -EPSILON)
- return GL_TRUE;
- else
- return GL_FALSE;
-}
-
-static GLboolean
-right(GLdouble A, GLdouble B, GLdouble C, GLdouble x, GLdouble y)
-{
- if (A * x + B * y + C < EPSILON)
- return GL_TRUE;
- else
- return GL_FALSE;
-}
-
-static GLint
-convex_ccw(tess_vertex * va,
- tess_vertex * vb, tess_vertex * vc, GLUtriangulatorObj * tobj)
-{
- GLdouble d;
-
- d = twice_the_triangle_area(va, vb, vc);
-
- if (d > EPSILON) {
- return 1;
- }
- else if (d < -EPSILON) {
- return 0;
- }
- else {
- return -1;
- }
-}
-
-static GLint
-convex_cw(tess_vertex * va,
- tess_vertex * vb, tess_vertex * vc, GLUtriangulatorObj * tobj)
-{
- GLdouble d;
-
- d = twice_the_triangle_area(va, vb, vc);
-
- if (d < -EPSILON) {
- return 1;
- }
- else if (d > EPSILON) {
- return 0;
- }
- else {
- return -1;
- }
-}
-
-static GLboolean
-diagonal_ccw(tess_vertex * va,
- tess_vertex * vb,
- GLUtriangulatorObj * tobj, tess_contour * contour)
-{
- tess_vertex *vc = va->next, *vertex, *shadow_vertex;
- struct
- {
- GLdouble A, B, C;
- }
- ac, cb, ba;
- GLdouble x, y;
-
- GLint res = convex_ccw(va, vc, vb, tobj);
- if (res == 0)
- return GL_FALSE;
- if (res == -1)
- return GL_TRUE;
-
- ba.A = vb->y - va->y;
- ba.B = va->x - vb->x;
- ba.C = -ba.A * va->x - ba.B * va->y;
- ac.A = va->y - vc->y;
- ac.B = vc->x - va->x;
- ac.C = -ac.A * vc->x - ac.B * vc->y;
- cb.A = vc->y - vb->y;
- cb.B = vb->x - vc->x;
- cb.C = -cb.A * vb->x - cb.B * vb->y;
- for (vertex = vb->next; vertex != va; vertex = vertex->next) {
- shadow_vertex = vertex->shadow_vertex;
- if (shadow_vertex != NULL &&
- (shadow_vertex == va || shadow_vertex == vb || shadow_vertex == vc))
- continue;
- x = vertex->x;
- y = vertex->y;
- if (left(ba.A, ba.B, ba.C, x, y) &&
- left(ac.A, ac.B, ac.C, x, y) && left(cb.A, cb.B, cb.C, x, y))
- return GL_FALSE;
- }
- return GL_TRUE;
-}
-
-static GLboolean
-diagonal_cw(tess_vertex * va,
- tess_vertex * vb,
- GLUtriangulatorObj * tobj, tess_contour * contour)
-{
- tess_vertex *vc = va->next, *vertex, *shadow_vertex;
- struct
- {
- GLdouble A, B, C;
- }
- ac, cb, ba;
- GLdouble x, y;
-
- GLint res = convex_cw(va, vc, vb, tobj);
- if (res == 0)
- return GL_FALSE;
- if (res == -1)
- return GL_TRUE;
-
- ba.A = vb->y - va->y;
- ba.B = va->x - vb->x;
- ba.C = -ba.A * va->x - ba.B * va->y;
- ac.A = va->y - vc->y;
- ac.B = vc->x - va->x;
- ac.C = -ac.A * vc->x - ac.B * vc->y;
- cb.A = vc->y - vb->y;
- cb.B = vb->x - vc->x;
- cb.C = -cb.A * vb->x - cb.B * vb->y;
- for (vertex = vb->next; vertex != va; vertex = vertex->next) {
- shadow_vertex = vertex->shadow_vertex;
- if (shadow_vertex != NULL &&
- (shadow_vertex == va || shadow_vertex == vb || shadow_vertex == vc))
- continue;
- x = vertex->x;
- y = vertex->y;
- if (right(ba.A, ba.B, ba.C, x, y) &&
- right(ac.A, ac.B, ac.C, x, y) && right(cb.A, cb.B, cb.C, x, y))
- return GL_FALSE;
- }
- return GL_TRUE;
-}
-
-static void
-clip_ear(GLUtriangulatorObj * tobj, tess_vertex * v, tess_contour * contour)
-{
- emit_triangle(tobj, v->previous, v, v->next);
- /* the first in the list */
- if (contour->vertices == v) {
- contour->vertices = v->next;
- contour->last_vertex->next = v->next;
- v->next->previous = contour->last_vertex;
- }
- else
- /* the last ? */
- if (contour->last_vertex == v) {
- contour->vertices->previous = v->previous;
- v->previous->next = v->next;
- contour->last_vertex = v->previous;
- }
- else {
- v->next->previous = v->previous;
- v->previous->next = v->next;
- }
- free(v);
- --(contour->vertex_cnt);
-}
-
-static void
-clip_ear_with_edge_flag(GLUtriangulatorObj * tobj,
- tess_vertex * v, tess_contour * contour)
-{
- emit_triangle_with_edge_flag(tobj, v->previous, v->previous->edge_flag,
- v, v->edge_flag, v->next, GL_FALSE);
- v->previous->edge_flag = GL_FALSE;
- /* the first in the list */
- if (contour->vertices == v) {
- contour->vertices = v->next;
- contour->last_vertex->next = v->next;
- v->next->previous = contour->last_vertex;
- }
- else
- /* the last ? */
- if (contour->last_vertex == v) {
- contour->vertices->previous = v->previous;
- v->previous->next = v->next;
- contour->last_vertex = v->previous;
- }
- else {
- v->next->previous = v->previous;
- v->previous->next = v->next;
- }
- free(v);
- --(contour->vertex_cnt);
-}
-
-static void
-triangulate_ccw(GLUtriangulatorObj * tobj, tess_contour * contour)
-{
- tess_vertex *vertex;
- GLuint vertex_cnt = contour->vertex_cnt;
-
- while (vertex_cnt > 3) {
- vertex = contour->vertices;
- while (diagonal_ccw(vertex, vertex->next->next, tobj, contour) ==
- GL_FALSE && tobj->error == GLU_NO_ERROR)
- vertex = vertex->next;
- if (tobj->error != GLU_NO_ERROR)
- return;
- clip_ear(tobj, vertex->next, contour);
- --vertex_cnt;
- }
-}
-
-static void
-triangulate_cw(GLUtriangulatorObj * tobj, tess_contour * contour)
-{
- tess_vertex *vertex;
- GLuint vertex_cnt = contour->vertex_cnt;
-
- while (vertex_cnt > 3) {
- vertex = contour->vertices;
- while (diagonal_cw(vertex, vertex->next->next, tobj, contour) ==
- GL_FALSE && tobj->error == GLU_NO_ERROR)
- vertex = vertex->next;
- if (tobj->error != GLU_NO_ERROR)
- return;
- clip_ear(tobj, vertex->next, contour);
- --vertex_cnt;
- }
-}
-
-static void
-triangulate_ccw_with_edge_flag(GLUtriangulatorObj * tobj,
- tess_contour * contour)
-{
- tess_vertex *vertex;
- GLuint vertex_cnt = contour->vertex_cnt;
-
- while (vertex_cnt > 3) {
- vertex = contour->vertices;
- while (diagonal_ccw(vertex, vertex->next->next, tobj, contour) ==
- GL_FALSE && tobj->error == GLU_NO_ERROR)
- vertex = vertex->next;
- if (tobj->error != GLU_NO_ERROR)
- return;
- clip_ear_with_edge_flag(tobj, vertex->next, contour);
- --vertex_cnt;
- }
-}
-
-static void
-triangulate_cw_with_edge_flag(GLUtriangulatorObj * tobj,
- tess_contour * contour)
-{
- tess_vertex *vertex;
- GLuint vertex_cnt = contour->vertex_cnt;
-
- while (vertex_cnt > 3) {
- vertex = contour->vertices;
- while (diagonal_cw(vertex, vertex->next->next, tobj, contour) ==
- GL_FALSE && tobj->error == GLU_NO_ERROR)
- vertex = vertex->next;
- if (tobj->error != GLU_NO_ERROR)
- return;
- clip_ear_with_edge_flag(tobj, vertex->next, contour);
- --vertex_cnt;
- }
-}
-
-void
-tess_tesselate(GLUtriangulatorObj * tobj)
-{
- tess_contour *contour;
-
- for (contour = tobj->contours; contour != NULL; contour = contour->next) {
- if (contour->orientation == GLU_CCW) {
- triangulate_ccw(tobj, contour);
- }
- else {
- triangulate_cw(tobj, contour);
- }
- if (tobj->error != GLU_NO_ERROR)
- return;
-
- /* emit the last triangle */
- emit_triangle(tobj, contour->vertices, contour->vertices->next,
- contour->vertices->next->next);
- }
-}
-
-void
-tess_tesselate_with_edge_flag(GLUtriangulatorObj * tobj)
-{
- tess_contour *contour;
-
- edge_flag = GL_TRUE;
- /* first callback with edgeFlag set to GL_TRUE */
- (tobj->callbacks.edgeFlag) (GL_TRUE);
-
- for (contour = tobj->contours; contour != NULL; contour = contour->next) {
- if (contour->orientation == GLU_CCW)
- triangulate_ccw_with_edge_flag(tobj, contour);
- else
- triangulate_cw_with_edge_flag(tobj, contour);
- if (tobj->error != GLU_NO_ERROR)
- return;
- /* emit the last triangle */
- emit_triangle_with_edge_flag(tobj, contour->vertices,
- contour->vertices->edge_flag,
- contour->vertices->next,
- contour->vertices->next->edge_flag,
- contour->vertices->next->next,
- contour->vertices->next->next->edge_flag);
- }
-}
-
-static void
-emit_triangle(GLUtriangulatorObj * tobj,
- tess_vertex * v1, tess_vertex * v2, tess_vertex * v3)
-{
- (tobj->callbacks.begin) (GL_TRIANGLES);
- (tobj->callbacks.vertex) (v1->data);
- (tobj->callbacks.vertex) (v2->data);
- (tobj->callbacks.vertex) (v3->data);
- (tobj->callbacks.end) ();
-}
-
-static void
-emit_triangle_with_edge_flag(GLUtriangulatorObj * tobj,
- tess_vertex * v1,
- GLboolean edge_flag1,
- tess_vertex * v2,
- GLboolean edge_flag2,
- tess_vertex * v3, GLboolean edge_flag3)
-{
- (tobj->callbacks.begin) (GL_TRIANGLES);
- if (edge_flag1 != edge_flag) {
- edge_flag = (edge_flag == GL_TRUE ? GL_FALSE : GL_TRUE);
- (tobj->callbacks.edgeFlag) (edge_flag);
- }
- (tobj->callbacks.vertex) (v1->data);
- if (edge_flag2 != edge_flag) {
- edge_flag = (edge_flag == GL_TRUE ? GL_FALSE : GL_TRUE);
- (tobj->callbacks.edgeFlag) (edge_flag);
- }
- (tobj->callbacks.vertex) (v2->data);
- if (edge_flag3 != edge_flag) {
- edge_flag = (edge_flag == GL_TRUE ? GL_FALSE : GL_TRUE);
- (tobj->callbacks.edgeFlag) (edge_flag);
- }
- (tobj->callbacks.vertex) (v3->data);
- (tobj->callbacks.end) ();
-}
+++ /dev/null
-
-/*
- * Mesa 3-D graphics library
- * Version: 3.3
- * Copyright (C) 1995-2000 Brian Paul
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-
-/*
- * This file includes all .h files needed for the GLU source code for
- * the purpose of precompiled headers.
- *
- * If the preprocessor symbol PCH is defined at compile time then each
- * of the .c files will #include "all.h" only, instead of a bunch of
- * individual .h files.
- */
-
-
-#ifndef GLU_ALL_H
-#define GLU_ALL_H
-
-
-#ifndef PC_HEADER
-This is an error. all.h should be included only if PCH is defined.
-#endif
-
-
-#include <assert.h>
-#include <math.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include "GL/gl.h"
-#include "GL/glu.h"
-#include "gluP.h"
-#include "nurbs.h"
-#include "tess.h"
-
-
-#endif /*GLU_ALL_H */
+++ /dev/null
-
-/*
- * Mesa 3-D graphics library
- * Version: 3.5
- * Copyright (C) 1995-2001 Brian Paul
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-
-#ifdef PC_HEADER
-#include "all.h"
-#else
-#include <assert.h>
-#include <math.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include "gluP.h"
-#endif
-
-
-/*
- * Miscellaneous utility functions
- */
-
-
-#ifndef M_PI
-#define M_PI 3.1415926536
-#endif
-#define EPS 0.00001
-
-#ifndef GLU_INCOMPATIBLE_GL_VERSION
-#define GLU_INCOMPATIBLE_GL_VERSION 100903
-#endif
-
-
-void GLAPIENTRY
-gluLookAt(GLdouble eyex, GLdouble eyey, GLdouble eyez,
- GLdouble centerx, GLdouble centery, GLdouble centerz,
- GLdouble upx, GLdouble upy, GLdouble upz)
-{
- GLfloat m[16];
- GLfloat x[3], y[3], z[3];
- GLfloat mag;
-
- /* Make rotation matrix */
-
- /* Z vector */
- z[0] = eyex - centerx;
- z[1] = eyey - centery;
- z[2] = eyez - centerz;
- mag = sqrt(z[0] * z[0] + z[1] * z[1] + z[2] * z[2]);
- if (mag) { /* mpichler, 19950515 */
- z[0] /= mag;
- z[1] /= mag;
- z[2] /= mag;
- }
-
- /* Y vector */
- y[0] = upx;
- y[1] = upy;
- y[2] = upz;
-
- /* X vector = Y cross Z */
- x[0] = y[1] * z[2] - y[2] * z[1];
- x[1] = -y[0] * z[2] + y[2] * z[0];
- x[2] = y[0] * z[1] - y[1] * z[0];
-
- /* Recompute Y = Z cross X */
- y[0] = z[1] * x[2] - z[2] * x[1];
- y[1] = -z[0] * x[2] + z[2] * x[0];
- y[2] = z[0] * x[1] - z[1] * x[0];
-
- /* mpichler, 19950515 */
- /* cross product gives area of parallelogram, which is < 1.0 for
- * non-perpendicular unit-length vectors; so normalize x, y here
- */
-
- mag = sqrt(x[0] * x[0] + x[1] * x[1] + x[2] * x[2]);
- if (mag) {
- x[0] /= mag;
- x[1] /= mag;
- x[2] /= mag;
- }
-
- mag = sqrt(y[0] * y[0] + y[1] * y[1] + y[2] * y[2]);
- if (mag) {
- y[0] /= mag;
- y[1] /= mag;
- y[2] /= mag;
- }
-
-#define M(row,col) m[col*4+row]
- M(0, 0) = x[0];
- M(0, 1) = x[1];
- M(0, 2) = x[2];
- M(0, 3) = 0.0;
- M(1, 0) = y[0];
- M(1, 1) = y[1];
- M(1, 2) = y[2];
- M(1, 3) = 0.0;
- M(2, 0) = z[0];
- M(2, 1) = z[1];
- M(2, 2) = z[2];
- M(2, 3) = 0.0;
- M(3, 0) = 0.0;
- M(3, 1) = 0.0;
- M(3, 2) = 0.0;
- M(3, 3) = 1.0;
-#undef M
- glMultMatrixf(m);
-
- /* Translate Eye to Origin */
- glTranslatef(-eyex, -eyey, -eyez);
-
-}
-
-
-
-void GLAPIENTRY
-gluOrtho2D(GLdouble left, GLdouble right, GLdouble bottom, GLdouble top)
-{
- glOrtho(left, right, bottom, top, -1.0, 1.0);
-}
-
-
-
-static void
-frustum(GLfloat left, GLfloat right,
- GLfloat bottom, GLfloat top,
- GLfloat nearval, GLfloat farval)
-{
- GLfloat x, y, a, b, c, d;
- GLfloat m[16];
-
- x = (2.0 * nearval) / (right - left);
- y = (2.0 * nearval) / (top - bottom);
- a = (right + left) / (right - left);
- b = (top + bottom) / (top - bottom);
- c = -(farval + nearval) / ( farval - nearval);
- d = -(2.0 * farval * nearval) / (farval - nearval);
-
-#define M(row,col) m[col*4+row]
- M(0,0) = x; M(0,1) = 0.0F; M(0,2) = a; M(0,3) = 0.0F;
- M(1,0) = 0.0F; M(1,1) = y; M(1,2) = b; M(1,3) = 0.0F;
- M(2,0) = 0.0F; M(2,1) = 0.0F; M(2,2) = c; M(2,3) = d;
- M(3,0) = 0.0F; M(3,1) = 0.0F; M(3,2) = -1.0F; M(3,3) = 0.0F;
-#undef M
-
- glMultMatrixf(m);
-}
-
-
-void GLAPIENTRY
-gluPerspective(GLdouble fovy, GLdouble aspect, GLdouble zNear, GLdouble zFar)
-{
- GLfloat xmin, xmax, ymin, ymax;
-
- ymax = zNear * tan(fovy * M_PI / 360.0);
- ymin = -ymax;
- xmin = ymin * aspect;
- xmax = ymax * aspect;
-
- /* don't call glFrustum() because of error semantics (covglu) */
- frustum(xmin, xmax, ymin, ymax, zNear, zFar);
-}
-
-
-
-void GLAPIENTRY
-gluPickMatrix(GLdouble x, GLdouble y,
- GLdouble width, GLdouble height, GLint viewport[4])
-{
- GLfloat m[16];
- GLfloat sx, sy;
- GLfloat tx, ty;
-
- sx = viewport[2] / width;
- sy = viewport[3] / height;
- tx = (viewport[2] + 2.0 * (viewport[0] - x)) / width;
- ty = (viewport[3] + 2.0 * (viewport[1] - y)) / height;
-
-#define M(row,col) m[col*4+row]
- M(0, 0) = sx;
- M(0, 1) = 0.0;
- M(0, 2) = 0.0;
- M(0, 3) = tx;
- M(1, 0) = 0.0;
- M(1, 1) = sy;
- M(1, 2) = 0.0;
- M(1, 3) = ty;
- M(2, 0) = 0.0;
- M(2, 1) = 0.0;
- M(2, 2) = 1.0;
- M(2, 3) = 0.0;
- M(3, 0) = 0.0;
- M(3, 1) = 0.0;
- M(3, 2) = 0.0;
- M(3, 3) = 1.0;
-#undef M
-
- glMultMatrixf(m);
-}
-
-
-
-const GLubyte *GLAPIENTRY
-gluErrorString(GLenum errorCode)
-{
- static char *tess_error[] = {
- "missing gluBeginPolygon",
- "missing gluBeginContour",
- "missing gluEndPolygon",
- "missing gluEndContour",
- "misoriented or self-intersecting loops",
- "coincident vertices",
- "colinear vertices",
- "FIST recovery process fatal error"
- };
- static char *nurbs_error[] = {
- "spline order un-supported",
- "too few knots",
- "valid knot range is empty",
- "decreasing knot sequence knot",
- "knot multiplicity greater than order of spline",
- "endcurve() must follow bgncurve()",
- "bgncurve() must precede endcurve()",
- "missing or extra geometric data",
- "can't draw pwlcurves",
- "missing bgncurve()",
- "missing bgnsurface()",
- "endtrim() must precede endsurface()",
- "bgnsurface() must precede endsurface()",
- "curve of improper type passed as trim curve",
- "bgnsurface() must precede bgntrim()",
- "endtrim() must follow bgntrim()",
- "bgntrim() must precede endtrim()",
- "invalid or missing trim curve",
- "bgntrim() must precede pwlcurve()",
- "pwlcurve referenced twice",
- "pwlcurve and nurbscurve mixed",
- "improper usage of trim data type",
- "nurbscurve referenced twice",
- "nurbscurve and pwlcurve mixed",
- "nurbssurface referenced twice",
- "invalid property",
- "endsurface() must follow bgnsurface()",
- "misoriented trim curves",
- "intersecting trim curves",
- "UNUSED",
- "unconnected trim curves",
- "unknown knot error",
- "negative vertex count encountered",
- "negative byte-stride encountered",
- "unknown type descriptor",
- "null control array or knot vector",
- "duplicate point on pwlcurve"
- };
-
- /* GL Errors */
- if (errorCode == GL_NO_ERROR) {
- return (GLubyte *) "no error";
- }
- else if (errorCode == GL_INVALID_VALUE) {
- return (GLubyte *) "invalid value";
- }
- else if (errorCode == GL_INVALID_ENUM) {
- return (GLubyte *) "invalid enum";
- }
- else if (errorCode == GL_INVALID_OPERATION) {
- return (GLubyte *) "invalid operation";
- }
- else if (errorCode == GL_STACK_OVERFLOW) {
- return (GLubyte *) "stack overflow";
- }
- else if (errorCode == GL_STACK_UNDERFLOW) {
- return (GLubyte *) "stack underflow";
- }
- else if (errorCode == GL_OUT_OF_MEMORY) {
- return (GLubyte *) "out of memory";
- }
- /* GLU Errors */
- else if (errorCode == GLU_NO_ERROR) {
- return (GLubyte *) "no error";
- }
- else if (errorCode == GLU_INVALID_ENUM) {
- return (GLubyte *) "invalid enum";
- }
- else if (errorCode == GLU_INVALID_VALUE) {
- return (GLubyte *) "invalid value";
- }
- else if (errorCode == GLU_OUT_OF_MEMORY) {
- return (GLubyte *) "out of memory";
- }
- else if (errorCode == GLU_INCOMPATIBLE_GL_VERSION) {
- return (GLubyte *) "incompatible GL version";
- }
- else if (errorCode >= GLU_TESS_ERROR1 && errorCode <= GLU_TESS_ERROR8) {
- return (GLubyte *) tess_error[errorCode - GLU_TESS_ERROR1];
- }
- else if (errorCode >= GLU_NURBS_ERROR1 && errorCode <= GLU_NURBS_ERROR37) {
- return (GLubyte *) nurbs_error[errorCode - GLU_NURBS_ERROR1];
- }
- else {
- return NULL;
- }
-}
-
-
-
-/*
- * New in GLU 1.1
- */
-
-const GLubyte *GLAPIENTRY
-gluGetString(GLenum name)
-{
- static char *extensions = "GL_EXT_abgr";
- static char *version = "1.1 Mesa 3.5";
-
- switch (name) {
- case GLU_EXTENSIONS:
- return (GLubyte *) extensions;
- case GLU_VERSION:
- return (GLubyte *) version;
- default:
- return NULL;
- }
-}
-
-
-
-#if 0 /* gluGetProcAddressEXT not finalized yet! */
-
-#ifdef __cplusplus
- /* for BeOS R4.5 */
-void GLAPIENTRY(*gluGetProcAddressEXT(const GLubyte * procName)) (...)
-#else
-void (GLAPIENTRY * gluGetProcAddressEXT(const GLubyte * procName)) ()
-#endif
-{
- struct proc
- {
- const char *name;
- void *address;
- };
- static struct proc procTable[] = {
- {"gluGetProcAddressEXT", (void *) gluGetProcAddressEXT}, /* me! */
-
- /* new 1.1 functions */
- {"gluGetString", (void *) gluGetString},
-
- /* new 1.2 functions */
- {"gluTessBeginPolygon", (void *) gluTessBeginPolygon},
- {"gluTessBeginContour", (void *) gluTessBeginContour},
- {"gluTessEndContour", (void *) gluTessEndContour},
- {"gluTessEndPolygon", (void *) gluTessEndPolygon},
- {"gluGetTessProperty", (void *) gluGetTessProperty},
-
- /* new 1.3 functions */
-
- {NULL, NULL}
- };
- GLuint i;
-
- for (i = 0; procTable[i].address; i++) {
- if (strcmp((const char *) procName, procTable[i].name) == 0)
- return (void (GLAPIENTRY *) ()) procTable[i].address;
- }
-
- return NULL;
-}
-
-#endif
-
-
-
-/*
- * New in GLU 1.3
- */
-#ifdef GLU_VERSION_1_3
-GLboolean GLAPIENTRY
-gluCheckExtension(const GLubyte *extName, const GLubyte * extString)
-{
- assert(extName);
- assert(extString);
- {
- const int len = strlen((const char *) extName);
- const char *start = (const char *) extString;
-
- while (1) {
- const char *c = strstr(start, (const char *) extName);
- if (!c)
- return GL_FALSE;
-
- if ((c == start || c[-1] == ' ') && (c[len] == ' ' || c[len] == 0))
- return GL_TRUE;
-
- start = c + len;
- }
- }
-}
-#endif
+++ /dev/null
-
-/*
- * Mesa 3-D graphics library
- * Version: 3.3
- * Copyright (C) 1995-2000 Brian Paul
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-
-/*
- * This file allows the GLU code to be compiled either with the Mesa
- * headers or with the real OpenGL headers.
- */
-
-
-#ifndef GLUP_H
-#define GLUP_H
-
-
-#include <GL/gl.h>
-#include <GL/glu.h>
-#include <string.h>
-
-
-#if defined(_WIN32) && !defined(__WIN32__)
-# define __WIN32__
-#endif
-
-#if !defined(OPENSTEP) && (defined(__WIN32__) || defined(__CYGWIN__))
-# pragma warning( disable : 4068 ) /* unknown pragma */
-# pragma warning( disable : 4710 ) /* function 'foo' not inlined */
-# pragma warning( disable : 4711 ) /* function 'foo' selected for automatic inline expansion */
-# pragma warning( disable : 4127 ) /* conditional expression is constant */
-# if defined(MESA_MINWARN)
-# pragma warning( disable : 4244 ) /* '=' : conversion from 'const double ' to 'float ', possible loss of data */
-# pragma warning( disable : 4018 ) /* '<' : signed/unsigned mismatch */
-# pragma warning( disable : 4305 ) /* '=' : truncation from 'const double ' to 'float ' */
-# pragma warning( disable : 4550 ) /* 'function' undefined; assuming extern returning int */
-# pragma warning( disable : 4761 ) /* integral size mismatch in argument; conversion supplied */
-# endif
-# if defined(_MSC_VER) && defined(BUILD_GL32) /* tag specify we're building mesa as a DLL */
-# define GLAPI __declspec(dllexport)
-# define WGLAPI __declspec(dllexport)
-# elif defined(_MSC_VER) && defined(_DLL) /* tag specifying we're building for DLL runtime support */
-# define GLAPI __declspec(dllimport)
-# define WGLAPI __declspec(dllimport)
-# else /* for use with static link lib build of Win32 edition only */
-# define GLAPI extern
-# define WGLAPI __declspec(dllimport)
-# endif /* _STATIC_MESA support */
-# define GLAPIENTRY __stdcall
-# define GLAPIENTRYP __stdcall *
-# define GLCALLBACK __stdcall
-# define GLCALLBACKP __stdcall *
-# if defined(__CYGWIN__)
-# define GLCALLBACKPCAST *
-# else
-# define GLCALLBACKPCAST __stdcall *
-# endif
-# define GLWINAPI __stdcall
-# define GLWINAPIV __cdecl
-#else
-/* non-Windows compilation */
-# define GLAPI extern
-# define GLAPIENTRY
-# define GLAPIENTRYP *
-# define GLCALLBACK
-# define GLCALLBACKP *
-# define GLCALLBACKPCAST *
-# define GLWINAPI
-# define GLWINAPIV
-#endif /* WIN32 / CYGWIN bracket */
-
-/* compatibility guard so we don't need to change client code */
-
-#if defined(_WIN32) && !defined(_WINDEF_) && !defined(_GNU_H_WINDOWS32_BASE) && !defined(OPENSTEP)
-# define CALLBACK GLCALLBACK
-typedef int (GLAPIENTRY *PROC)();
-typedef void *HGLRC;
-typedef void *HDC;
-typedef unsigned long COLORREF;
-#endif
-
-#if defined(_WIN32) && !defined(_WINGDI_) && !defined(_GNU_H_WINDOWS32_DEFINES) && !defined(OPENSTEP)
-# define WGL_FONT_LINES 0
-# define WGL_FONT_POLYGONS 1
-#ifndef _GNU_H_WINDOWS32_FUNCTIONS
-# ifdef UNICODE
-# define wglUseFontBitmaps wglUseFontBitmapsW
-# define wglUseFontOutlines wglUseFontOutlinesW
-# else
-# define wglUseFontBitmaps wglUseFontBitmapsA
-# define wglUseFontOutlines wglUseFontOutlinesA
-# endif /* !UNICODE */
-#endif /* _GNU_H_WINDOWS32_FUNCTIONS */
-typedef struct tagLAYERPLANEDESCRIPTOR LAYERPLANEDESCRIPTOR, *PLAYERPLANEDESCRIPTOR, *LPLAYERPLANEDESCRIPTOR;
-typedef struct _GLYPHMETRICSFLOAT GLYPHMETRICSFLOAT, *PGLYPHMETRICSFLOAT, *LPGLYPHMETRICSFLOAT;
-typedef struct tagPIXELFORMATDESCRIPTOR PIXELFORMATDESCRIPTOR, *PPIXELFORMATDESCRIPTOR, *LPPIXELFORMATDESCRIPTOR;
-#include <gl/mesa_wgl.h>
-#endif
-
-
-
-#ifndef GLU_TESS_ERROR9
- /* If we're using the real OpenGL header files... */
-# define GLU_TESS_ERROR9 100159
-#endif
-
-
-#define GLU_NO_ERROR GL_NO_ERROR
-
-
-/* for Sun: */
-#ifdef SUNOS4
-#define MEMCPY( DST, SRC, BYTES) \
- memcpy( (char *) (DST), (char *) (SRC), (int) (BYTES) )
-#else
-#define MEMCPY( DST, SRC, BYTES) \
- memcpy( (void *) (DST), (void *) (SRC), (size_t) (BYTES) )
-#endif
-
-
-#ifndef NULL
-# define NULL 0
-#endif
-
-
-#endif
+++ /dev/null
-
-/*
- * Mesa 3-D graphics library
- * Version: 3.4
- * Copyright (C) 1995-2000 Brian Paul
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-
-#ifdef PC_HEADER
-#include "all.h"
-#else
-#include <assert.h>
-#include <math.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include "gluP.h"
-#endif
-
-
-/*
- * Compute ceiling of integer quotient of A divided by B:
- */
-#define CEILING( A, B ) ( (A) % (B) == 0 ? (A)/(B) : (A)/(B)+1 )
-
-
-
-#ifdef EPSILON
-#undef EPSILON
-#endif
-#define EPSILON 0.001
-
-
-/* To work around optimizer bug in MSVC4.1 */
-#if defined(__WIN32__) && !defined(OPENSTEP)
-void
-dummy(GLuint j, GLuint k)
-{
-}
-#else
-#define dummy(J, K)
-#endif
-
-
-GLint GLAPIENTRY
-gluScaleImage(GLenum format,
- GLsizei widthin, GLsizei heightin,
- GLenum typein, const void *datain,
- GLsizei widthout, GLsizei heightout,
- GLenum typeout, void *dataout)
-{
- GLint components, i, j, k;
- GLfloat *tempin, *tempout, f;
- GLfloat sx, sy;
- GLint unpackrowlength, unpackalignment, unpackskiprows, unpackskippixels;
- GLint packrowlength, packalignment, packskiprows, packskippixels;
- GLint sizein, sizeout;
- GLint rowstride, rowlen;
-
-
- /* Determine number of components per pixel */
- switch (format) {
- case GL_COLOR_INDEX:
- case GL_STENCIL_INDEX:
- case GL_DEPTH_COMPONENT:
- case GL_RED:
- case GL_GREEN:
- case GL_BLUE:
- case GL_ALPHA:
- case GL_LUMINANCE:
- components = 1;
- break;
- case GL_LUMINANCE_ALPHA:
- components = 2;
- break;
- case GL_RGB:
- case GL_BGR:
- components = 3;
- break;
- case GL_RGBA:
- case GL_BGRA:
-#ifdef GL_EXT_abgr
- case GL_ABGR_EXT:
-#endif
- components = 4;
- break;
- default:
- return GLU_INVALID_ENUM;
- }
-
- /* Determine bytes per input datum */
- switch (typein) {
- case GL_UNSIGNED_BYTE:
- sizein = sizeof(GLubyte);
- break;
- case GL_BYTE:
- sizein = sizeof(GLbyte);
- break;
- case GL_UNSIGNED_SHORT:
- sizein = sizeof(GLushort);
- break;
- case GL_SHORT:
- sizein = sizeof(GLshort);
- break;
- case GL_UNSIGNED_INT:
- sizein = sizeof(GLuint);
- break;
- case GL_INT:
- sizein = sizeof(GLint);
- break;
- case GL_FLOAT:
- sizein = sizeof(GLfloat);
- break;
- case GL_BITMAP:
- /* not implemented yet */
- default:
- return GL_INVALID_ENUM;
- }
-
- /* Determine bytes per output datum */
- switch (typeout) {
- case GL_UNSIGNED_BYTE:
- sizeout = sizeof(GLubyte);
- break;
- case GL_BYTE:
- sizeout = sizeof(GLbyte);
- break;
- case GL_UNSIGNED_SHORT:
- sizeout = sizeof(GLushort);
- break;
- case GL_SHORT:
- sizeout = sizeof(GLshort);
- break;
- case GL_UNSIGNED_INT:
- sizeout = sizeof(GLuint);
- break;
- case GL_INT:
- sizeout = sizeof(GLint);
- break;
- case GL_FLOAT:
- sizeout = sizeof(GLfloat);
- break;
- case GL_BITMAP:
- /* not implemented yet */
- default:
- return GL_INVALID_ENUM;
- }
-
- /* Get glPixelStore state */
- glGetFloatv(GL_UNPACK_ROW_LENGTH, &f); unpackrowlength = (int)f;
- glGetFloatv(GL_UNPACK_ALIGNMENT, &f); unpackalignment = (int)f;
- glGetFloatv(GL_UNPACK_SKIP_ROWS, &f); unpackskiprows = (int)f;
- glGetFloatv(GL_UNPACK_SKIP_PIXELS, &f); unpackskippixels = (int)f;
- glGetFloatv(GL_PACK_ROW_LENGTH, &f); packrowlength = (int)f;
- glGetFloatv(GL_PACK_ALIGNMENT, &f); packalignment = (int)f;
- glGetFloatv(GL_PACK_SKIP_ROWS, &f); packskiprows = (int)f;
- glGetFloatv(GL_PACK_SKIP_PIXELS, &f); packskippixels = (int)f;
-
- /* Allocate storage for intermediate images */
- tempin = (GLfloat *) malloc(widthin * heightin
- * components * sizeof(GLfloat));
- if (!tempin) {
- return GLU_OUT_OF_MEMORY;
- }
- tempout = (GLfloat *) malloc(widthout * heightout
- * components * sizeof(GLfloat));
- if (!tempout) {
- free(tempin);
- return GLU_OUT_OF_MEMORY;
- }
-
-
- /*
- * Unpack the pixel data and convert to floating point
- */
-
- if (unpackrowlength > 0) {
- rowlen = unpackrowlength;
- }
- else {
- rowlen = widthin;
- }
- if (sizein >= unpackalignment) {
- rowstride = components * rowlen;
- }
- else {
- rowstride = unpackalignment / sizein
- * CEILING(components * rowlen * sizein, unpackalignment);
- }
-
- switch (typein) {
- case GL_UNSIGNED_BYTE:
- k = 0;
- for (i = 0; i < heightin; i++) {
- GLubyte *ubptr = (GLubyte *) datain
- + i * rowstride
- + unpackskiprows * rowstride + unpackskippixels * components;
- for (j = 0; j < widthin * components; j++) {
- dummy(j, k);
- tempin[k++] = (GLfloat) * ubptr++;
- }
- }
- break;
- case GL_BYTE:
- k = 0;
- for (i = 0; i < heightin; i++) {
- GLbyte *bptr = (GLbyte *) datain
- + i * rowstride
- + unpackskiprows * rowstride + unpackskippixels * components;
- for (j = 0; j < widthin * components; j++) {
- dummy(j, k);
- tempin[k++] = (GLfloat) * bptr++;
- }
- }
- break;
- case GL_UNSIGNED_SHORT:
- k = 0;
- for (i = 0; i < heightin; i++) {
- GLushort *usptr = (GLushort *) datain
- + i * rowstride
- + unpackskiprows * rowstride + unpackskippixels * components;
- for (j = 0; j < widthin * components; j++) {
- dummy(j, k);
- tempin[k++] = (GLfloat) * usptr++;
- }
- }
- break;
- case GL_SHORT:
- k = 0;
- for (i = 0; i < heightin; i++) {
- GLshort *sptr = (GLshort *) datain
- + i * rowstride
- + unpackskiprows * rowstride + unpackskippixels * components;
- for (j = 0; j < widthin * components; j++) {
- dummy(j, k);
- tempin[k++] = (GLfloat) * sptr++;
- }
- }
- break;
- case GL_UNSIGNED_INT:
- k = 0;
- for (i = 0; i < heightin; i++) {
- GLuint *uiptr = (GLuint *) datain
- + i * rowstride
- + unpackskiprows * rowstride + unpackskippixels * components;
- for (j = 0; j < widthin * components; j++) {
- dummy(j, k);
- tempin[k++] = (GLfloat) * uiptr++;
- }
- }
- break;
- case GL_INT:
- k = 0;
- for (i = 0; i < heightin; i++) {
- GLint *iptr = (GLint *) datain
- + i * rowstride
- + unpackskiprows * rowstride + unpackskippixels * components;
- for (j = 0; j < widthin * components; j++) {
- dummy(j, k);
- tempin[k++] = (GLfloat) * iptr++;
- }
- }
- break;
- case GL_FLOAT:
- k = 0;
- for (i = 0; i < heightin; i++) {
- GLfloat *fptr = (GLfloat *) datain
- + i * rowstride
- + unpackskiprows * rowstride + unpackskippixels * components;
- for (j = 0; j < widthin * components; j++) {
- dummy(j, k);
- tempin[k++] = *fptr++;
- }
- }
- break;
- default:
- {
- free(tempin);
- free(tempout);
- return GLU_INVALID_ENUM;
- }
- }
-
-
- /*
- * Scale the image!
- */
-
- if (widthout > 1)
- sx = (GLfloat) (widthin - 1) / (GLfloat) (widthout - 1);
- else
- sx = (GLfloat) (widthin - 1);
- if (heightout > 1)
- sy = (GLfloat) (heightin - 1) / (GLfloat) (heightout - 1);
- else
- sy = (GLfloat) (heightin - 1);
-
-/*#define POINT_SAMPLE*/
-#ifdef POINT_SAMPLE
- for (i = 0; i < heightout; i++) {
- GLint ii = i * sy;
- for (j = 0; j < widthout; j++) {
- GLint jj = j * sx;
-
- GLfloat *src = tempin + (ii * widthin + jj) * components;
- GLfloat *dst = tempout + (i * widthout + j) * components;
-
- for (k = 0; k < components; k++) {
- *dst++ = *src++;
- }
- }
- }
-#else
- if (sx < 1.0 && sy < 1.0) {
- /* magnify both width and height: use weighted sample of 4 pixels */
- GLint i0, i1, j0, j1;
- GLfloat alpha, beta;
- GLfloat *src00, *src01, *src10, *src11;
- GLfloat s1, s2;
- GLfloat *dst;
-
- for (i = 0; i < heightout; i++) {
- i0 = i * sy;
- i1 = i0 + 1;
- if (i1 >= heightin)
- i1 = heightin - 1;
-/* i1 = (i+1) * sy - EPSILON;*/
- alpha = i * sy - i0;
- for (j = 0; j < widthout; j++) {
- j0 = j * sx;
- j1 = j0 + 1;
- if (j1 >= widthin)
- j1 = widthin - 1;
-/* j1 = (j+1) * sx - EPSILON; */
- beta = j * sx - j0;
-
- /* compute weighted average of pixels in rect (i0,j0)-(i1,j1) */
- src00 = tempin + (i0 * widthin + j0) * components;
- src01 = tempin + (i0 * widthin + j1) * components;
- src10 = tempin + (i1 * widthin + j0) * components;
- src11 = tempin + (i1 * widthin + j1) * components;
-
- dst = tempout + (i * widthout + j) * components;
-
- for (k = 0; k < components; k++) {
- s1 = *src00++ * (1.0 - beta) + *src01++ * beta;
- s2 = *src10++ * (1.0 - beta) + *src11++ * beta;
- *dst++ = s1 * (1.0 - alpha) + s2 * alpha;
- }
- }
- }
- }
- else {
- /* shrink width and/or height: use an unweighted box filter */
- GLint i0, i1;
- GLint j0, j1;
- GLint ii, jj;
- GLfloat sum, *dst;
-
- for (i = 0; i < heightout; i++) {
- i0 = i * sy;
- i1 = i0 + 1;
- if (i1 >= heightin)
- i1 = heightin - 1;
-/* i1 = (i+1) * sy - EPSILON; */
- for (j = 0; j < widthout; j++) {
- j0 = j * sx;
- j1 = j0 + 1;
- if (j1 >= widthin)
- j1 = widthin - 1;
-/* j1 = (j+1) * sx - EPSILON; */
-
- dst = tempout + (i * widthout + j) * components;
-
- /* compute average of pixels in the rectangle (i0,j0)-(i1,j1) */
- for (k = 0; k < components; k++) {
- sum = 0.0;
- for (ii = i0; ii <= i1; ii++) {
- for (jj = j0; jj <= j1; jj++) {
- sum += *(tempin + (ii * widthin + jj) * components + k);
- }
- }
- sum /= (j1 - j0 + 1) * (i1 - i0 + 1);
- *dst++ = sum;
- }
- }
- }
- }
-#endif
-
-
- /*
- * Return output image
- */
-
- if (packrowlength > 0) {
- rowlen = packrowlength;
- }
- else {
- rowlen = widthout;
- }
- if (sizeout >= packalignment) {
- rowstride = components * rowlen;
- }
- else {
- rowstride = packalignment / sizeout
- * CEILING(components * rowlen * sizeout, packalignment);
- }
-
- switch (typeout) {
- case GL_UNSIGNED_BYTE:
- k = 0;
- for (i = 0; i < heightout; i++) {
- GLubyte *ubptr = (GLubyte *) dataout
- + i * rowstride
- + packskiprows * rowstride + packskippixels * components;
- for (j = 0; j < widthout * components; j++) {
- dummy(j, k + i);
- *ubptr++ = (GLubyte) tempout[k++];
- }
- }
- break;
- case GL_BYTE:
- k = 0;
- for (i = 0; i < heightout; i++) {
- GLbyte *bptr = (GLbyte *) dataout
- + i * rowstride
- + packskiprows * rowstride + packskippixels * components;
- for (j = 0; j < widthout * components; j++) {
- dummy(j, k + i);
- *bptr++ = (GLbyte) tempout[k++];
- }
- }
- break;
- case GL_UNSIGNED_SHORT:
- k = 0;
- for (i = 0; i < heightout; i++) {
- GLushort *usptr = (GLushort *) dataout
- + i * rowstride
- + packskiprows * rowstride + packskippixels * components;
- for (j = 0; j < widthout * components; j++) {
- dummy(j, k + i);
- *usptr++ = (GLushort) tempout[k++];
- }
- }
- break;
- case GL_SHORT:
- k = 0;
- for (i = 0; i < heightout; i++) {
- GLshort *sptr = (GLshort *) dataout
- + i * rowstride
- + packskiprows * rowstride + packskippixels * components;
- for (j = 0; j < widthout * components; j++) {
- dummy(j, k + i);
- *sptr++ = (GLshort) tempout[k++];
- }
- }
- break;
- case GL_UNSIGNED_INT:
- k = 0;
- for (i = 0; i < heightout; i++) {
- GLuint *uiptr = (GLuint *) dataout
- + i * rowstride
- + packskiprows * rowstride + packskippixels * components;
- for (j = 0; j < widthout * components; j++) {
- dummy(j, k + i);
- *uiptr++ = (GLuint) tempout[k++];
- }
- }
- break;
- case GL_INT:
- k = 0;
- for (i = 0; i < heightout; i++) {
- GLint *iptr = (GLint *) dataout
- + i * rowstride
- + packskiprows * rowstride + packskippixels * components;
- for (j = 0; j < widthout * components; j++) {
- dummy(j, k + i);
- *iptr++ = (GLint) tempout[k++];
- }
- }
- break;
- case GL_FLOAT:
- k = 0;
- for (i = 0; i < heightout; i++) {
- GLfloat *fptr = (GLfloat *) dataout
- + i * rowstride
- + packskiprows * rowstride + packskippixels * components;
- for (j = 0; j < widthout * components; j++) {
- dummy(j, k + i);
- *fptr++ = tempout[k++];
- }
- }
- break;
- default:
- return GLU_INVALID_ENUM;
- }
-
-
- /* free temporary image storage */
- free(tempin);
- free(tempout);
-
- return 0;
-}
-
-
-
-/*
- * Return the largest k such that 2^k <= n.
- */
-static GLint
-ilog2(GLint n)
-{
- GLint k;
-
- if (n <= 0)
- return 0;
- for (k = 0; n >>= 1; k++);
- return k;
-}
-
-
-
-/*
- * Find the value nearest to n which is also a power of two.
- */
-static GLint
-round2(GLint n)
-{
- GLint m;
-
- for (m = 1; m < n; m *= 2);
-
- /* m>=n */
- if (m - n <= n - m / 2) {
- return m;
- }
- else {
- return m / 2;
- }
-}
-
-
-/*
- * Given an pixel format and data type, return the number of bytes to
- * store one pixel.
- */
-static GLint
-bytes_per_pixel(GLenum format, GLenum type)
-{
- GLint n, m;
-
- switch (format) {
- case GL_COLOR_INDEX:
- case GL_STENCIL_INDEX:
- case GL_DEPTH_COMPONENT:
- case GL_RED:
- case GL_GREEN:
- case GL_BLUE:
- case GL_ALPHA:
- case GL_LUMINANCE:
- n = 1;
- break;
- case GL_LUMINANCE_ALPHA:
- n = 2;
- break;
- case GL_RGB:
- case GL_BGR:
- n = 3;
- break;
- case GL_RGBA:
- case GL_BGRA:
-#ifdef GL_EXT_abgr
- case GL_ABGR_EXT:
-#endif
- n = 4;
- break;
- default:
- n = 0;
- }
-
- switch (type) {
- case GL_UNSIGNED_BYTE:
- m = sizeof(GLubyte);
- break;
- case GL_BYTE:
- m = sizeof(GLbyte);
- break;
- case GL_BITMAP:
- m = 1;
- break;
- case GL_UNSIGNED_SHORT:
- m = sizeof(GLushort);
- break;
- case GL_SHORT:
- m = sizeof(GLshort);
- break;
- case GL_UNSIGNED_INT:
- m = sizeof(GLuint);
- break;
- case GL_INT:
- m = sizeof(GLint);
- break;
- case GL_FLOAT:
- m = sizeof(GLfloat);
- break;
- default:
- m = 0;
- }
-
- return n * m;
-}
-
-
-
-/*
- * WARNING: This function isn't finished and has never been tested!!!!
- */
-GLint GLAPIENTRY
-gluBuild1DMipmaps(GLenum target, GLint components,
- GLsizei width, GLenum format, GLenum type, const void *data)
-{
- return 0;
-}
-
-
-
-GLint GLAPIENTRY
-gluBuild2DMipmaps(GLenum target, GLint components,
- GLsizei width, GLsizei height, GLenum format,
- GLenum type, const void *data)
-{
- GLint w, h;
- GLint maxsize;
- void *image, *newimage;
- GLint neww, newh, level, bpp;
- int error;
- GLboolean done;
- GLint retval = 0;
- GLint unpackrowlength, unpackalignment, unpackskiprows, unpackskippixels;
- GLint packrowlength, packalignment, packskiprows, packskippixels;
- GLfloat f;
-
- if (width < 1 || height < 1)
- return GLU_INVALID_VALUE;
-
- glGetFloatv(GL_MAX_TEXTURE_SIZE, &f); maxsize = (int)f;
-
- w = round2(width);
- if (w > maxsize) {
- w = maxsize;
- }
- h = round2(height);
- if (h > maxsize) {
- h = maxsize;
- }
-
- bpp = bytes_per_pixel(format, type);
- if (bpp == 0) {
- /* probably a bad format or type enum */
- return GLU_INVALID_ENUM;
- }
-
- /* Get current glPixelStore values */
- glGetFloatv(GL_UNPACK_ROW_LENGTH, &f); unpackrowlength = (int)f;
- glGetFloatv(GL_UNPACK_ALIGNMENT, &f); unpackalignment = (int)f;
- glGetFloatv(GL_UNPACK_SKIP_ROWS, &f); unpackskiprows = (int)f;
- glGetFloatv(GL_UNPACK_SKIP_PIXELS, &f); unpackskippixels = (int)f;
- glGetFloatv(GL_PACK_ROW_LENGTH, &f); packrowlength = (int)f;
- glGetFloatv(GL_PACK_ALIGNMENT, &f); packalignment = (int)f;
- glGetFloatv(GL_PACK_SKIP_ROWS, &f); packskiprows = (int)f;
- glGetFloatv(GL_PACK_SKIP_PIXELS, &f); packskippixels = (int)f;
-
- /* set pixel packing */
- glPixelStorei(GL_PACK_ROW_LENGTH, 0);
- glPixelStorei(GL_PACK_ALIGNMENT, 1);
- glPixelStorei(GL_PACK_SKIP_ROWS, 0);
- glPixelStorei(GL_PACK_SKIP_PIXELS, 0);
-
- done = GL_FALSE;
-
- if (w != width || h != height) {
- /* must rescale image to get "top" mipmap texture image */
- image = malloc((w + 4) * h * bpp);
- if (!image) {
- return GLU_OUT_OF_MEMORY;
- }
- error = gluScaleImage(format, width, height, type, data,
- w, h, type, image);
- if (error) {
- retval = error;
- done = GL_TRUE;
- }
- }
- else {
- image = (void *) data;
- }
-
- level = 0;
- while (!done) {
- if (image != data) {
- /* set pixel unpacking */
- glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
- glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
- glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
- glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
- }
-
- glTexImage2D(target, level, components, w, h, 0, format, type, image);
-
- if (w == 1 && h == 1)
- break;
-
- neww = (w < 2) ? 1 : w / 2;
- newh = (h < 2) ? 1 : h / 2;
- newimage = malloc((neww + 4) * newh * bpp);
- if (!newimage) {
- return GLU_OUT_OF_MEMORY;
- }
-
- error = gluScaleImage(format, w, h, type, image,
- neww, newh, type, newimage);
- if (error) {
- retval = error;
- done = GL_TRUE;
- }
-
- if (image != data) {
- free(image);
- }
- image = newimage;
-
- w = neww;
- h = newh;
- level++;
- }
-
- if (image != data) {
- free(image);
- }
-
- /* Restore original glPixelStore state */
- glPixelStorei(GL_UNPACK_ROW_LENGTH, unpackrowlength);
- glPixelStorei(GL_UNPACK_ALIGNMENT, unpackalignment);
- glPixelStorei(GL_UNPACK_SKIP_ROWS, unpackskiprows);
- glPixelStorei(GL_UNPACK_SKIP_PIXELS, unpackskippixels);
- glPixelStorei(GL_PACK_ROW_LENGTH, packrowlength);
- glPixelStorei(GL_PACK_ALIGNMENT, packalignment);
- glPixelStorei(GL_PACK_SKIP_ROWS, packskiprows);
- glPixelStorei(GL_PACK_SKIP_PIXELS, packskippixels);
-
- return retval;
-}
+++ /dev/null
-
-/*
- * Mesa 3-D graphics library
- * Version: 3.3
- * Copyright (C) 1995-2000 Brian Paul
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-
-/*
- * NURBS implementation written by Bogdan Sikorski (bogdan@cira.it)
- * See README2 for more info.
- */
-
-
-#ifdef PC_HEADER
-#include "all.h"
-#else
-#include <stdio.h>
-#include <stdlib.h>
-#include "gluP.h"
-#include "nurbs.h"
-#endif
-
-
-void
-call_user_error(GLUnurbsObj * nobj, GLenum error)
-{
- nobj->error = error;
- if (nobj->error_callback != NULL) {
- (*(nobj->error_callback)) (error);
- }
- else {
- printf("NURBS error %d %s\n", error, (char *) gluErrorString(error));
- }
-}
-
-
-
-GLUnurbsObj *GLAPIENTRY
-gluNewNurbsRenderer(void)
-{
- GLUnurbsObj *n;
- GLfloat tmp_viewport[4];
- GLint i, j;
-
- n = (GLUnurbsObj *) malloc(sizeof(GLUnurbsObj));
- return n;
-}
-
-
-
-void GLAPIENTRY
-gluDeleteNurbsRenderer(GLUnurbsObj * nobj)
-{
- if (nobj) {
- free(nobj);
- }
-}
-
-
-
-void GLAPIENTRY
-gluLoadSamplingMatrices(GLUnurbsObj * nobj,
- const GLfloat modelMatrix[16],
- const GLfloat projMatrix[16], const GLint viewport[4])
-{
-}
-
-
-void GLAPIENTRY
-gluNurbsProperty(GLUnurbsObj * nobj, GLenum property, GLfloat value)
-{
-}
-
-
-void GLAPIENTRY
-gluGetNurbsProperty(GLUnurbsObj * nobj, GLenum property, GLfloat * value)
-{
-}
-
-
-
-void GLAPIENTRY
-gluBeginCurve(GLUnurbsObj * nobj)
-{
-}
-
-
-void GLAPIENTRY
-gluEndCurve(GLUnurbsObj * nobj)
-{
-}
-
-
-void GLAPIENTRY
-gluNurbsCurve(GLUnurbsObj * nobj, GLint nknots, GLfloat * knot,
- GLint stride, GLfloat * ctlarray, GLint order, GLenum type)
-{
-}
-
-
-void GLAPIENTRY
-gluBeginSurface(GLUnurbsObj * nobj)
-{
-}
-
-
-void GLAPIENTRY
-gluEndSurface(GLUnurbsObj * nobj)
-{
-}
-
-
-void GLAPIENTRY
-gluNurbsSurface(GLUnurbsObj * nobj,
- GLint sknot_count, GLfloat * sknot,
- GLint tknot_count, GLfloat * tknot,
- GLint s_stride, GLint t_stride,
- GLfloat * ctrlarray, GLint sorder, GLint torder, GLenum type)
-{
-}
-
-
-void GLAPIENTRY
-gluNurbsCallback(GLUnurbsObj * nobj, GLenum which, void (GLCALLBACK * fn) ())
-{
-}
-
-void GLAPIENTRY
-gluBeginTrim(GLUnurbsObj * nobj)
-{
-}
-
-void GLAPIENTRY
-gluPwlCurve(GLUnurbsObj * nobj, GLint count, GLfloat * array, GLint stride,
- GLenum type)
-{
-}
-
-void GLAPIENTRY
-gluEndTrim(GLUnurbsObj * nobj)
-{
-}
+++ /dev/null
-
-/*
- * Mesa 3-D graphics library
- * Version: 3.3
- * Copyright (C) 1995-2000 Brian Paul
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-
-/*
- * NURBS implementation written by Bogdan Sikorski (bogdan@cira.it)
- * See README2 for more info.
- */
-
-
-#ifndef NURBS_H
-#define NURBS_H
-
-
-#define EPSILON 1e-06 /* epsilon for double precision compares */
-
-typedef enum
-{
- GLU_NURBS_CURVE, GLU_NURBS_SURFACE, GLU_NURBS_TRIM, GLU_NURBS_NO_TRIM,
- GLU_NURBS_TRIM_DONE, GLU_NURBS_NONE
-}
-GLU_nurbs_enum;
-
-typedef enum
-{
- GLU_TRIM_NURBS, GLU_TRIM_PWL
-}
-GLU_trim_enum;
-
-typedef struct
-{
- GLint sknot_count;
- GLfloat *sknot;
- GLint tknot_count;
- GLfloat *tknot;
- GLint s_stride;
- GLint t_stride;
- GLfloat *ctrlarray;
- GLint sorder;
- GLint torder;
- GLint dim;
- GLenum type;
-}
-surface_attribs;
-
-typedef struct
-{
- surface_attribs geom;
- surface_attribs color;
- surface_attribs texture;
- surface_attribs normal;
-}
-nurbs_surface;
-
-typedef struct
-{
- GLint knot_count;
- GLfloat *knot;
- GLint stride;
- GLfloat *ctrlarray;
- GLint order;
- GLint dim;
- GLenum type;
-}
-curve_attribs;
-
-typedef struct
-{
- GLint pt_count;
- GLfloat *ctrlarray;
- GLint stride;
- GLint dim;
- GLenum type;
-}
-pwl_curve_attribs;
-
-typedef struct
-{
- curve_attribs geom;
- curve_attribs color;
- curve_attribs texture;
- curve_attribs normal;
-}
-nurbs_curve;
-
-typedef struct trim_list_str
-{
- GLU_trim_enum trim_type;
- union
- {
- pwl_curve_attribs pwl_curve;
- curve_attribs nurbs_curve;
- }
- curve;
- struct trim_list_str *next;
-}
-trim_list;
-
-typedef struct seg_trim_str
-{
- GLfloat *points;
- GLint pt_cnt, seg_array_len;
- struct seg_trim_str *next;
-}
-trim_segments;
-
-typedef struct nurbs_trim_str
-{
- trim_list *trim_loop;
- trim_segments *segments;
- struct nurbs_trim_str *next;
-}
-nurbs_trim;
-
-typedef struct
-{
- GLfloat model[16], proj[16], viewport[4];
-}
-culling_and_sampling_str;
-
-struct GLUnurbs
-{
- GLboolean culling;
- GLenum error;
- void (GLCALLBACK * error_callback) (GLenum err);
- GLenum display_mode;
- GLU_nurbs_enum nurbs_type;
- GLboolean auto_load_matrix;
- culling_and_sampling_str sampling_matrices;
- GLenum sampling_method;
- GLfloat sampling_tolerance;
- GLfloat parametric_tolerance;
- GLint u_step, v_step;
- nurbs_surface surface;
- nurbs_curve curve;
- nurbs_trim *trim;
-};
-
-typedef struct
-{
- GLfloat *knot;
- GLint nknots;
- GLfloat *unified_knot;
- GLint unified_nknots;
- GLint order;
- GLint t_min, t_max;
- GLint delta_nknots;
- GLboolean open_at_begin, open_at_end;
- GLfloat *new_knot;
- GLfloat *alpha;
-}
-knot_str_type;
-
-typedef struct
-{
- GLfloat *geom_ctrl;
- GLint geom_s_stride, geom_t_stride;
- GLfloat **geom_offsets;
- GLint geom_s_pt_cnt, geom_t_pt_cnt;
- GLfloat *color_ctrl;
- GLint color_s_stride, color_t_stride;
- GLfloat **color_offsets;
- GLint color_s_pt_cnt, color_t_pt_cnt;
- GLfloat *normal_ctrl;
- GLint normal_s_stride, normal_t_stride;
- GLfloat **normal_offsets;
- GLint normal_s_pt_cnt, normal_t_pt_cnt;
- GLfloat *texture_ctrl;
- GLint texture_s_stride, texture_t_stride;
- GLfloat **texture_offsets;
- GLint texture_s_pt_cnt, texture_t_pt_cnt;
- GLint s_bezier_cnt, t_bezier_cnt;
-}
-new_ctrl_type;
-
-extern void call_user_error(GLUnurbsObj * nobj, GLenum error);
-
-extern GLenum test_knot(GLint nknots, GLfloat * knot, GLint order);
-
-extern GLenum explode_knot(knot_str_type * the_knot);
-
-extern GLenum calc_alphas(knot_str_type * the_knot);
-
-extern GLenum calc_new_ctrl_pts(GLfloat * ctrl, GLint stride,
- knot_str_type * the_knot, GLint dim,
- GLfloat ** new_ctrl, GLint * ncontrol);
-
-extern GLenum glu_do_sampling_crv(GLUnurbsObj * nobj, GLfloat * new_ctrl,
- GLint n_ctrl, GLint order, GLint dim,
- GLint ** factors);
-
-extern GLenum glu_do_sampling_3D(GLUnurbsObj * nobj, new_ctrl_type * new_ctrl,
- int **sfactors, GLint ** tfactors);
-
-extern GLenum glu_do_sampling_uv(GLUnurbsObj * nobj, new_ctrl_type * new_ctrl,
- int **sfactors, GLint ** tfactors);
-
-extern GLenum glu_do_sampling_param_3D(GLUnurbsObj * nobj,
- new_ctrl_type * new_ctrl,
- int **sfactors, GLint ** tfactors);
-
-extern GLboolean fine_culling_test_2D(GLUnurbsObj * nobj, GLfloat * ctrl,
- GLint n_ctrl, GLint stride, GLint dim);
-
-extern GLboolean fine_culling_test_3D(GLUnurbsObj * nobj, GLfloat * ctrl,
- GLint s_n_ctrl, GLint t_n_ctrl,
- GLint s_stride, GLint t_stride,
- GLint dim);
-
-extern void do_nurbs_curve(GLUnurbsObj * nobj);
-
-extern void do_nurbs_surface(GLUnurbsObj * nobj);
-
-extern GLenum patch_trimming(GLUnurbsObj * nobj, new_ctrl_type * new_ctrl,
- GLint * sfactors, GLint * tfactors);
-
-extern void collect_unified_knot(knot_str_type * dest, knot_str_type * src,
- GLfloat maximal_min_knot,
- GLfloat minimal_max_knot);
-
-extern GLenum select_knot_working_range(GLUnurbsObj * nobj,
- knot_str_type * geom_knot,
- knot_str_type * color_knot,
- knot_str_type * normal_knot,
- knot_str_type * texture_knot);
-
-extern void free_unified_knots(knot_str_type * geom_knot,
- knot_str_type * color_knot,
- knot_str_type * normal_knot,
- knot_str_type * texture_knot);
-
-
-
-#endif
+++ /dev/null
-
-/*
- * Mesa 3-D graphics library
- * Version: 3.3
- * Copyright (C) 1995-2000 Brian Paul
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-
-/*
- * NURBS implementation written by Bogdan Sikorski (bogdan@cira.it)
- * See README2 for more info.
- */
-
-
-#ifdef PC_HEADER
-#include "all.h"
-#else
-#include <math.h>
-#include <stdlib.h>
-#include "gluP.h"
-#include "nurbs.h"
-#endif
-
-
-
-/* main NURBS curve procedure */
-void
-do_nurbs_curve(GLUnurbsObj * nobj)
-{
- GLint geom_order, color_order = 0, normal_order = 0, texture_order = 0;
- GLenum geom_type;
- GLint n_ctrl;
- GLfloat *new_geom_ctrl, *new_color_ctrl, *new_normal_ctrl,
- *new_texture_ctrl;
- GLfloat *geom_ctrl = 0, *color_ctrl = 0, *normal_ctrl = 0, *texture_ctrl = 0;
- GLint *factors;
- GLint i, j;
- GLint geom_dim, color_dim = 0, normal_dim = 0, texture_dim = 0;
-
- /* test the user supplied data */
- if (test_nurbs_curves(nobj) != GLU_NO_ERROR)
- return;
-
- if (convert_curves(nobj, &new_geom_ctrl, &n_ctrl, &new_color_ctrl,
- &new_normal_ctrl, &new_texture_ctrl) != GLU_NO_ERROR)
- return;
-
- geom_order = nobj->curve.geom.order;
- geom_type = nobj->curve.geom.type;
- geom_dim = nobj->curve.geom.dim;
-
- if (glu_do_sampling_crv(nobj, new_geom_ctrl, n_ctrl, geom_order, geom_dim,
- &factors) != GLU_NO_ERROR) {
- free(new_geom_ctrl);
- if (new_color_ctrl)
- free(new_color_ctrl);
- if (new_normal_ctrl)
- free(new_normal_ctrl);
- if (new_texture_ctrl)
- free(new_texture_ctrl);
- return;
- }
- glEnable(geom_type);
- if (new_color_ctrl) {
- glEnable(nobj->curve.color.type);
- color_dim = nobj->curve.color.dim;
- color_ctrl = new_color_ctrl;
- color_order = nobj->curve.color.order;
- }
- if (new_normal_ctrl) {
- glEnable(nobj->curve.normal.type);
- normal_dim = nobj->curve.normal.dim;
- normal_ctrl = new_normal_ctrl;
- normal_order = nobj->curve.normal.order;
- }
- if (new_texture_ctrl) {
- glEnable(nobj->curve.texture.type);
- texture_dim = nobj->curve.texture.dim;
- texture_ctrl = new_texture_ctrl;
- texture_order = nobj->curve.texture.order;
- }
- for (i = 0, j = 0, geom_ctrl = new_geom_ctrl;
- i < n_ctrl; i += geom_order, j++, geom_ctrl += geom_order * geom_dim) {
- if (fine_culling_test_2D
- (nobj, geom_ctrl, geom_order, geom_dim, geom_dim)) {
- color_ctrl += color_order * color_dim;
- normal_ctrl += normal_order * normal_dim;
- texture_ctrl += texture_order * texture_dim;
- continue;
- }
- glMap1f(geom_type, 0.0, 1.0, geom_dim, geom_order, geom_ctrl);
- if (new_color_ctrl) {
- glMap1f(nobj->curve.color.type, 0.0, 1.0, color_dim,
- color_order, color_ctrl);
- color_ctrl += color_order * color_dim;
- }
- if (new_normal_ctrl) {
- glMap1f(nobj->curve.normal.type, 0.0, 1.0, normal_dim,
- normal_order, normal_ctrl);
- normal_ctrl += normal_order * normal_dim;
- }
- if (new_texture_ctrl) {
- glMap1f(nobj->curve.texture.type, 0.0, 1.0, texture_dim,
- texture_order, texture_ctrl);
- texture_ctrl += texture_order * texture_dim;
- }
- glMapGrid1f(factors[j], 0.0, 1.0);
- glEvalMesh1(GL_LINE, 0, factors[j]);
- }
- free(new_geom_ctrl);
- free(factors);
- if (new_color_ctrl)
- free(new_color_ctrl);
- if (new_normal_ctrl)
- free(new_normal_ctrl);
- if (new_texture_ctrl)
- free(new_texture_ctrl);
-}
+++ /dev/null
-
-/*
- * Mesa 3-D graphics library
- * Version: 3.3
- * Copyright (C) 1995-2000 Brian Paul
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-
-/*
- * This file is part of the polygon tesselation code contributed by
- * Bogdan Sikorski
- */
-
-
-#ifdef PC_HEADER
-#include "all.h"
-#else
-#include <math.h>
-#include <stdlib.h>
-#include "gluP.h"
-#include "tess.h"
-#endif
-
-
-
-static GLenum store_polygon_as_contour(GLUtriangulatorObj *);
-static void free_current_polygon(tess_polygon *);
-static void prepare_projection_info(GLUtriangulatorObj *);
-static GLdouble twice_the_polygon_area(tess_vertex *, tess_vertex *);
-static GLenum verify_edge_vertex_intersections(GLUtriangulatorObj *);
-void tess_find_contour_hierarchies(GLUtriangulatorObj *);
-static GLenum test_for_overlapping_contours(GLUtriangulatorObj *);
-static GLenum contours_overlap(tess_contour *, tess_polygon *);
-static GLenum is_contour_contained_in(tess_contour *, tess_contour *);
-static void add_new_exterior(GLUtriangulatorObj *, tess_contour *);
-static void add_new_interior(GLUtriangulatorObj *, tess_contour *,
- tess_contour *);
-static void add_interior_with_hierarchy_check(GLUtriangulatorObj *,
- tess_contour *, tess_contour *);
-static void reverse_hierarchy_and_add_exterior(GLUtriangulatorObj *,
- tess_contour *,
- tess_contour *);
-static GLboolean point_in_polygon(tess_contour *, GLdouble, GLdouble);
-static void shift_interior_to_exterior(GLUtriangulatorObj *, tess_contour *);
-static void add_exterior_with_check(GLUtriangulatorObj *, tess_contour *,
- tess_contour *);
-static GLenum cut_out_hole(GLUtriangulatorObj *, tess_contour *,
- tess_contour *);
-static GLenum merge_hole_with_contour(GLUtriangulatorObj *,
- tess_contour *, tess_contour *,
- tess_vertex *, tess_vertex *);
-
-static GLenum
-find_normal(GLUtriangulatorObj * tobj)
-{
- tess_polygon *polygon = tobj->current_polygon;
- tess_vertex *va, *vb, *vc;
- GLdouble A, B, C;
- GLdouble A0, A1, A2, B0, B1, B2;
-
- va = polygon->vertices;
- vb = va->next;
- A0 = vb->location[0] - va->location[0];
- A1 = vb->location[1] - va->location[1];
- A2 = vb->location[2] - va->location[2];
- for (vc = vb->next; vc != va; vc = vc->next) {
- B0 = vc->location[0] - va->location[0];
- B1 = vc->location[1] - va->location[1];
- B2 = vc->location[2] - va->location[2];
- A = A1 * B2 - A2 * B1;
- B = A2 * B0 - A0 * B2;
- C = A0 * B1 - A1 * B0;
- if (fabs(A) > EPSILON || fabs(B) > EPSILON || fabs(C) > EPSILON) {
- polygon->A = A;
- polygon->B = B;
- polygon->C = C;
- polygon->D =
- -A * va->location[0] - B * va->location[1] - C * va->location[2];
- return GLU_NO_ERROR;
- }
- }
- tess_call_user_error(tobj, GLU_TESS_ERROR7);
- return GLU_ERROR;
-}
-
-void
-tess_test_polygon(GLUtriangulatorObj * tobj)
-{
- tess_polygon *polygon = tobj->current_polygon;
-
- /* any vertices defined? */
- if (polygon->vertex_cnt < 3) {
- free_current_polygon(polygon);
- return;
- }
- /* wrap pointers */
- polygon->last_vertex->next = polygon->vertices;
- polygon->vertices->previous = polygon->last_vertex;
- /* determine the normal */
- if (find_normal(tobj) == GLU_ERROR)
- return;
- /* compare the normals of previously defined contours and this one */
- /* first contour define ? */
- if (tobj->contours == NULL) {
- tobj->A = polygon->A;
- tobj->B = polygon->B;
- tobj->C = polygon->C;
- tobj->D = polygon->D;
- /* determine the best projection to use */
- if (fabs(polygon->A) > fabs(polygon->B))
- if (fabs(polygon->A) > fabs(polygon->C))
- tobj->projection = OYZ;
- else
- tobj->projection = OXY;
- else if (fabs(polygon->B) > fabs(polygon->C))
- tobj->projection = OXZ;
- else
- tobj->projection = OXY;
- }
- else {
- GLdouble a[3], b[3];
- tess_vertex *vertex = polygon->vertices;
-
- a[0] = tobj->A;
- a[1] = tobj->B;
- a[2] = tobj->C;
- b[0] = polygon->A;
- b[1] = polygon->B;
- b[2] = polygon->C;
-
- /* compare the normals */
- if (fabs(a[1] * b[2] - a[2] * b[1]) > EPSILON ||
- fabs(a[2] * b[0] - a[0] * b[2]) > EPSILON ||
- fabs(a[0] * b[1] - a[1] * b[0]) > EPSILON) {
- /* not coplanar */
- tess_call_user_error(tobj, GLU_TESS_ERROR9);
- return;
- }
- /* the normals are parallel - test for plane equation */
- if (fabs(a[0] * vertex->location[0] + a[1] * vertex->location[1] +
- a[2] * vertex->location[2] + tobj->D) > EPSILON) {
- /* not the same plane */
- tess_call_user_error(tobj, GLU_TESS_ERROR9);
- return;
- }
- }
- prepare_projection_info(tobj);
- if (verify_edge_vertex_intersections(tobj) == GLU_ERROR)
- return;
- if (test_for_overlapping_contours(tobj) == GLU_ERROR)
- return;
- if (store_polygon_as_contour(tobj) == GLU_ERROR)
- return;
-}
-
-static GLenum
-test_for_overlapping_contours(GLUtriangulatorObj * tobj)
-{
- tess_contour *contour;
- tess_polygon *polygon;
-
- polygon = tobj->current_polygon;
- for (contour = tobj->contours; contour != NULL; contour = contour->next)
- if (contours_overlap(contour, polygon) != GLU_NO_ERROR) {
- tess_call_user_error(tobj, GLU_TESS_ERROR5);
- return GLU_ERROR;
- }
- return GLU_NO_ERROR;
-}
-
-static GLenum
-store_polygon_as_contour(GLUtriangulatorObj * tobj)
-{
- tess_polygon *polygon = tobj->current_polygon;
- tess_contour *contour = tobj->contours;
-
- /* the first contour defined */
- if (contour == NULL) {
- if ((contour = (tess_contour *) malloc(sizeof(tess_contour))) == NULL) {
- tess_call_user_error(tobj, GLU_OUT_OF_MEMORY);
- free_current_polygon(polygon);
- return GLU_ERROR;
- }
- tobj->contours = tobj->last_contour = contour;
- contour->next = contour->previous = NULL;
- }
- else {
- if ((contour = (tess_contour *) malloc(sizeof(tess_contour))) == NULL) {
- tess_call_user_error(tobj, GLU_OUT_OF_MEMORY);
- free_current_polygon(polygon);
- return GLU_ERROR;
- }
- contour->previous = tobj->last_contour;
- tobj->last_contour->next = contour;
- tobj->last_contour = contour;
- contour->next = NULL;
- }
- /* mark all vertices in new contour as not special */
- /* and all are boundary edges */
- {
- tess_vertex *vertex;
- GLuint vertex_cnt, i;
-
- for (vertex = polygon->vertices, i = 0, vertex_cnt =
- polygon->vertex_cnt; i < vertex_cnt; vertex = vertex->next, i++) {
- vertex->shadow_vertex = NULL;
- vertex->edge_flag = GL_TRUE;
- }
- }
- contour->vertex_cnt = polygon->vertex_cnt;
- contour->area = polygon->area;
- contour->orientation = polygon->orientation;
- contour->type = GLU_UNKNOWN;
- contour->vertices = polygon->vertices;
- contour->last_vertex = polygon->last_vertex;
- polygon->vertices = polygon->last_vertex = NULL;
- polygon->vertex_cnt = 0;
- ++(tobj->contour_cnt);
- return GLU_NO_ERROR;
-}
-
-static void
-free_current_polygon(tess_polygon * polygon)
-{
- tess_vertex *vertex, *vertex_tmp;
- GLuint i;
-
- /* free current_polygon structures */
- for (vertex = polygon->vertices, i = 0; i < polygon->vertex_cnt; i++) {
- vertex_tmp = vertex->next;
- free(vertex);
- vertex = vertex_tmp;
- }
- polygon->vertices = polygon->last_vertex = NULL;
- polygon->vertex_cnt = 0;
-}
-
-static void
-prepare_projection_info(GLUtriangulatorObj * tobj)
-{
- tess_polygon *polygon = tobj->current_polygon;
- tess_vertex *vertex, *last_vertex_ptr;
- GLdouble area;
-
- last_vertex_ptr = polygon->last_vertex;
- switch (tobj->projection) {
- case OXY:
- for (vertex = polygon->vertices; vertex != last_vertex_ptr;
- vertex = vertex->next) {
- vertex->x = vertex->location[0];
- vertex->y = vertex->location[1];
- }
- last_vertex_ptr->x = last_vertex_ptr->location[0];
- last_vertex_ptr->y = last_vertex_ptr->location[1];
- break;
- case OXZ:
- for (vertex = polygon->vertices; vertex != last_vertex_ptr;
- vertex = vertex->next) {
- vertex->x = vertex->location[0];
- vertex->y = vertex->location[2];
- }
- last_vertex_ptr->x = last_vertex_ptr->location[0];
- last_vertex_ptr->y = last_vertex_ptr->location[2];
- break;
- case OYZ:
- for (vertex = polygon->vertices; vertex != last_vertex_ptr;
- vertex = vertex->next) {
- vertex->x = vertex->location[1];
- vertex->y = vertex->location[2];
- }
- last_vertex_ptr->x = last_vertex_ptr->location[1];
- last_vertex_ptr->y = last_vertex_ptr->location[2];
- break;
- }
- area = twice_the_polygon_area(polygon->vertices, polygon->last_vertex);
- if (area >= 0.0) {
- polygon->orientation = GLU_CCW;
- polygon->area = area;
- }
- else {
- polygon->orientation = GLU_CW;
- polygon->area = -area;
- }
-}
-
-static GLdouble
-twice_the_polygon_area(tess_vertex * vertex, tess_vertex * last_vertex)
-{
- tess_vertex *next;
- GLdouble area, x, y;
-
- area = 0.0;
- x = vertex->x;
- y = vertex->y;
- vertex = vertex->next;
- for (; vertex != last_vertex; vertex = vertex->next) {
- next = vertex->next;
- area +=
- (vertex->x - x) * (next->y - y) - (vertex->y - y) * (next->x - x);
- }
- return area;
-}
-
-/* test if edges ab and cd intersect */
-/* if not return GLU_NO_ERROR, else if cross return GLU_TESS_ERROR8, */
-/* else if adjacent return GLU_TESS_ERROR4 */
-static GLenum
-edge_edge_intersect(tess_vertex * a,
- tess_vertex * b, tess_vertex * c, tess_vertex * d)
-{
- GLdouble denom, r, s;
- GLdouble xba, ydc, yba, xdc, yac, xac;
-
- xba = b->x - a->x;
- yba = b->y - a->y;
- xdc = d->x - c->x;
- ydc = d->y - c->y;
- xac = a->x - c->x;
- yac = a->y - c->y;
- denom = xba * ydc - yba * xdc;
- r = yac * xdc - xac * ydc;
- /* parallel? */
- if (fabs(denom) < EPSILON) {
- if (fabs(r) < EPSILON) {
- /* colinear */
- if (fabs(xba) < EPSILON) {
- /* compare the Y coordinate */
- if (yba > 0.0) {
- if (
- (fabs(a->y - c->y) < EPSILON
- && fabs(c->y - b->y) < EPSILON)
- || (fabs(a->y - d->y) < EPSILON
- && fabs(d->y - b->y) <
- EPSILON)) return GLU_TESS_ERROR4;
-
- }
- else {
- if (
- (fabs(b->y - c->y) < EPSILON
- && fabs(c->y - a->y) < EPSILON)
- || (fabs(b->y - d->y) < EPSILON
- && fabs(d->y - a->y) <
- EPSILON)) return GLU_TESS_ERROR4;
- }
- }
- else {
- /* compare the X coordinate */
- if (xba > 0.0) {
- if (
- (fabs(a->x - c->x) < EPSILON
- && fabs(c->x - b->x) < EPSILON)
- || (fabs(a->x - d->x) < EPSILON
- && fabs(d->x - b->x) <
- EPSILON)) return GLU_TESS_ERROR4;
- }
- else {
- if (
- (fabs(b->x - c->x) < EPSILON
- && fabs(c->x - a->x) < EPSILON)
- || (fabs(b->x - d->x) < EPSILON
- && fabs(d->x - a->x) <
- EPSILON)) return GLU_TESS_ERROR4;
- }
- }
- }
- return GLU_NO_ERROR;
- }
- r /= denom;
- s = (yac * xba - xac * yba) / denom;
- /* test if one vertex lies on other edge */
- if (((fabs(r) < EPSILON || (r < 1.0 + EPSILON && r > 1.0 - EPSILON)) &&
- s > -EPSILON && s < 1.0 + EPSILON) ||
- ((fabs(s) < EPSILON || (s < 1.0 + EPSILON && s > 1.0 - EPSILON)) &&
- r > -EPSILON && r < 1.0 + EPSILON)) {
- return GLU_TESS_ERROR4;
- }
- /* test for crossing */
- if (r > -EPSILON && r < 1.0 + EPSILON && s > -EPSILON && s < 1.0 + EPSILON) {
- return GLU_TESS_ERROR8;
- }
- return GLU_NO_ERROR;
-}
-
-static GLenum
-verify_edge_vertex_intersections(GLUtriangulatorObj * tobj)
-{
- tess_polygon *polygon = tobj->current_polygon;
- tess_vertex *vertex1, *last_vertex, *vertex2;
- GLenum test;
-
- last_vertex = polygon->last_vertex;
- vertex1 = last_vertex;
- for (vertex2 = vertex1->next->next;
- vertex2->next != last_vertex; vertex2 = vertex2->next) {
- test = edge_edge_intersect(vertex1, vertex1->next, vertex2,
- vertex2->next);
- if (test != GLU_NO_ERROR) {
- tess_call_user_error(tobj, test);
- return GLU_ERROR;
- }
- }
- for (vertex1 = polygon->vertices;
- vertex1->next->next != last_vertex; vertex1 = vertex1->next) {
- for (vertex2 = vertex1->next->next;
- vertex2 != last_vertex; vertex2 = vertex2->next) {
- test = edge_edge_intersect(vertex1, vertex1->next, vertex2,
- vertex2->next);
- if (test != GLU_NO_ERROR) {
- tess_call_user_error(tobj, test);
- return GLU_ERROR;
- }
- }
- }
- return GLU_NO_ERROR;
-}
-
-static int
-#ifdef WIN32
- __cdecl
-#endif
-area_compare(const void *a, const void *b)
-{
- GLdouble area1, area2;
-
- area1 = (*((tess_contour **) a))->area;
- area2 = (*((tess_contour **) b))->area;
- if (area1 < area2)
- return 1;
- if (area1 > area2)
- return -1;
- return 0;
-}
-
-void
-tess_find_contour_hierarchies(GLUtriangulatorObj * tobj)
-{
- tess_contour **contours; /* dinamic array of pointers */
- tess_contour *tmp_contour_ptr = tobj->contours;
- GLuint cnt, i;
- GLenum result;
- GLboolean hierarchy_changed;
-
- /* any contours? */
- if (tobj->contour_cnt < 2) {
- tobj->contours->type = GLU_EXTERIOR;
- return;
- }
- if ((contours = (tess_contour **)
- malloc(sizeof(tess_contour *) * (tobj->contour_cnt))) == NULL) {
- tess_call_user_error(tobj, GLU_OUT_OF_MEMORY);
- return;
- }
- for (tmp_contour_ptr = tobj->contours, cnt = 0;
- tmp_contour_ptr != NULL; tmp_contour_ptr = tmp_contour_ptr->next)
- contours[cnt++] = tmp_contour_ptr;
- /* now sort the contours in decreasing area size order */
- qsort((void *) contours, (size_t) cnt, (size_t) sizeof(tess_contour *),
- area_compare);
- /* we leave just the first contour - remove others from list */
- tobj->contours = contours[0];
- tobj->contours->next = tobj->contours->previous = NULL;
- tobj->last_contour = tobj->contours;
- tobj->contour_cnt = 1;
- /* first contour is the one with greatest area */
- /* must be EXTERIOR */
- tobj->contours->type = GLU_EXTERIOR;
- tmp_contour_ptr = tobj->contours;
- /* now we play! */
- for (i = 1; i < cnt; i++) {
- hierarchy_changed = GL_FALSE;
- for (tmp_contour_ptr = tobj->contours;
- tmp_contour_ptr != NULL; tmp_contour_ptr = tmp_contour_ptr->next) {
- if (tmp_contour_ptr->type == GLU_EXTERIOR) {
- /* check if contour completely contained in EXTERIOR */
- result = is_contour_contained_in(tmp_contour_ptr, contours[i]);
- switch (result) {
- case GLU_INTERIOR:
- /* now we have to check if contour is inside interiors */
- /* or not */
- /* any interiors? */
- if (tmp_contour_ptr->next != NULL &&
- tmp_contour_ptr->next->type == GLU_INTERIOR) {
- /* for all interior, check if inside any of them */
- /* if not inside any of interiors, its another */
- /* interior */
- /* or it may contain some interiors, then change */
- /* the contained interiors to exterior ones */
- add_interior_with_hierarchy_check(tobj,
- tmp_contour_ptr,
- contours[i]);
- }
- else {
- /* not in interior, add as new interior contour */
- add_new_interior(tobj, tmp_contour_ptr, contours[i]);
- }
- hierarchy_changed = GL_TRUE;
- break;
- case GLU_EXTERIOR:
- /* ooops, the marked as EXTERIOR (contours[i]) is */
- /* actually an interior of tmp_contour_ptr */
- /* reverse the local hierarchy */
- reverse_hierarchy_and_add_exterior(tobj, tmp_contour_ptr,
- contours[i]);
- hierarchy_changed = GL_TRUE;
- break;
- case GLU_NO_ERROR:
- break;
- default:
- abort();
- }
- }
- if (hierarchy_changed)
- break; /* break from for loop */
- }
- if (hierarchy_changed == GL_FALSE) {
- /* disjoint with all contours, add to contour list */
- add_new_exterior(tobj, contours[i]);
- }
- }
- free(contours);
-}
-
-/* returns GLU_INTERIOR if inner is completey enclosed within outer */
-/* returns GLU_EXTERIOR if outer is completely enclosed within inner */
-/* returns GLU_NO_ERROR if contours are disjoint */
-static GLenum
-is_contour_contained_in(tess_contour * outer, tess_contour * inner)
-{
- GLenum relation_flag;
-
- /* set relation_flag to relation of containment of first inner vertex */
- /* regarding outer contour */
- if (point_in_polygon(outer, inner->vertices->x, inner->vertices->y))
- relation_flag = GLU_INTERIOR;
- else
- relation_flag = GLU_EXTERIOR;
- if (relation_flag == GLU_INTERIOR)
- return GLU_INTERIOR;
- if (point_in_polygon(inner, outer->vertices->x, outer->vertices->y))
- return GLU_EXTERIOR;
- return GLU_NO_ERROR;
-}
-
-static GLboolean
-point_in_polygon(tess_contour * contour, GLdouble x, GLdouble y)
-{
- tess_vertex *v1, *v2;
- GLuint i, vertex_cnt;
- GLdouble xp1, yp1, xp2, yp2;
- GLboolean tst;
-
- tst = GL_FALSE;
- v1 = contour->vertices;
- v2 = contour->vertices->previous;
- for (i = 0, vertex_cnt = contour->vertex_cnt; i < vertex_cnt; i++) {
- xp1 = v1->x;
- yp1 = v1->y;
- xp2 = v2->x;
- yp2 = v2->y;
- if ((((yp1 <= y) && (y < yp2)) || ((yp2 <= y) && (y < yp1))) &&
- (x < (xp2 - xp1) * (y - yp1) / (yp2 - yp1) + xp1))
- tst = (tst == GL_FALSE ? GL_TRUE : GL_FALSE);
- v2 = v1;
- v1 = v1->next;
- }
- return tst;
-}
-
-static GLenum
-contours_overlap(tess_contour * contour, tess_polygon * polygon)
-{
- tess_vertex *vertex1, *vertex2;
- GLuint vertex1_cnt, vertex2_cnt, i, j;
- GLenum test;
-
- vertex1 = contour->vertices;
- vertex2 = polygon->vertices;
- vertex1_cnt = contour->vertex_cnt;
- vertex2_cnt = polygon->vertex_cnt;
- for (i = 0; i < vertex1_cnt; vertex1 = vertex1->next, i++) {
- for (j = 0; j < vertex2_cnt; vertex2 = vertex2->next, j++)
- if ((test = edge_edge_intersect(vertex1, vertex1->next, vertex2,
- vertex2->next)) != GLU_NO_ERROR)
- return test;
- }
- return GLU_NO_ERROR;
-}
-
-static void
-add_new_exterior(GLUtriangulatorObj * tobj, tess_contour * contour)
-{
- contour->type = GLU_EXTERIOR;
- contour->next = NULL;
- contour->previous = tobj->last_contour;
- tobj->last_contour->next = contour;
- tobj->last_contour = contour;
-}
-
-static void
-add_new_interior(GLUtriangulatorObj * tobj,
- tess_contour * outer, tess_contour * contour)
-{
- contour->type = GLU_INTERIOR;
- contour->next = outer->next;
- contour->previous = outer;
- if (outer->next != NULL)
- outer->next->previous = contour;
- outer->next = contour;
- if (tobj->last_contour == outer)
- tobj->last_contour = contour;
-}
-
-static void
-add_interior_with_hierarchy_check(GLUtriangulatorObj * tobj,
- tess_contour * outer,
- tess_contour * contour)
-{
- tess_contour *ptr;
-
- /* for all interiors of outer check if they are interior of contour */
- /* if so, change that interior to exterior and move it of of the */
- /* interior sequence */
- if (outer->next != NULL && outer->next->type == GLU_INTERIOR) {
- GLenum test;
-
- for (ptr = outer->next; ptr != NULL && ptr->type == GLU_INTERIOR;
- ptr = ptr->next) {
- test = is_contour_contained_in(ptr, contour);
- switch (test) {
- case GLU_INTERIOR:
- /* contour is contained in one of the interiors */
- /* check if possibly contained in other exteriors */
- /* move ptr to first EXTERIOR */
- for (; ptr != NULL && ptr->type == GLU_INTERIOR; ptr = ptr->next);
- if (ptr == NULL)
- /* another exterior */
- add_new_exterior(tobj, contour);
- else
- add_exterior_with_check(tobj, ptr, contour);
- return;
- case GLU_EXTERIOR:
- /* one of the interiors is contained in the contour */
- /* change it to EXTERIOR, and shift it away from the */
- /* interior sequence */
- shift_interior_to_exterior(tobj, ptr);
- break;
- case GLU_NO_ERROR:
- /* disjoint */
- break;
- default:
- abort();
- }
- }
- }
- /* add contour to the interior sequence */
- add_new_interior(tobj, outer, contour);
-}
-
-static void
-reverse_hierarchy_and_add_exterior(GLUtriangulatorObj * tobj,
- tess_contour * outer,
- tess_contour * contour)
-{
- tess_contour *ptr;
-
- /* reverse INTERIORS to EXTERIORS */
- /* any INTERIORS? */
- if (outer->next != NULL && outer->next->type == GLU_INTERIOR)
- for (ptr = outer->next; ptr != NULL && ptr->type == GLU_INTERIOR;
- ptr = ptr->next) ptr->type = GLU_EXTERIOR;
- /* the outer now becomes inner */
- outer->type = GLU_INTERIOR;
- /* contour is the EXTERIOR */
- contour->next = outer;
- if (tobj->contours == outer) {
- /* first contour beeing reversed */
- contour->previous = NULL;
- tobj->contours = contour;
- }
- else {
- outer->previous->next = contour;
- contour->previous = outer->previous;
- }
- outer->previous = contour;
-}
-
-static void
-shift_interior_to_exterior(GLUtriangulatorObj * tobj, tess_contour * contour)
-{
- contour->previous->next = contour->next;
- if (contour->next != NULL)
- contour->next->previous = contour->previous;
- else
- tobj->last_contour = contour->previous;
-}
-
-static void
-add_exterior_with_check(GLUtriangulatorObj * tobj,
- tess_contour * outer, tess_contour * contour)
-{
- GLenum test;
-
- /* this contour might be interior to further exteriors - check */
- /* if not, just add as a new exterior */
- for (; outer != NULL && outer->type == GLU_EXTERIOR; outer = outer->next) {
- test = is_contour_contained_in(outer, contour);
- switch (test) {
- case GLU_INTERIOR:
- /* now we have to check if contour is inside interiors */
- /* or not */
- /* any interiors? */
- if (outer->next != NULL && outer->next->type == GLU_INTERIOR) {
- /* for all interior, check if inside any of them */
- /* if not inside any of interiors, its another */
- /* interior */
- /* or it may contain some interiors, then change */
- /* the contained interiors to exterior ones */
- add_interior_with_hierarchy_check(tobj, outer, contour);
- }
- else {
- /* not in interior, add as new interior contour */
- add_new_interior(tobj, outer, contour);
- }
- return;
- case GLU_NO_ERROR:
- /* disjoint */
- break;
- default:
- abort();
- }
- }
- /* add contour to the exterior sequence */
- add_new_exterior(tobj, contour);
-}
-
-void
-tess_handle_holes(GLUtriangulatorObj * tobj)
-{
- tess_contour *contour, *hole;
- GLenum exterior_orientation;
-
- /* verify hole orientation */
- for (contour = tobj->contours; contour != NULL;) {
- exterior_orientation = contour->orientation;
- for (contour = contour->next;
- contour != NULL && contour->type == GLU_INTERIOR;
- contour = contour->next) {
- if (contour->orientation == exterior_orientation) {
- tess_call_user_error(tobj, GLU_TESS_ERROR5);
- return;
- }
- }
- }
- /* now cut-out holes */
- for (contour = tobj->contours; contour != NULL;) {
- hole = contour->next;
- while (hole != NULL && hole->type == GLU_INTERIOR) {
- if (cut_out_hole(tobj, contour, hole) == GLU_ERROR)
- return;
- hole = contour->next;
- }
- contour = contour->next;
- }
-}
-
-static GLenum
-cut_out_hole(GLUtriangulatorObj * tobj,
- tess_contour * contour, tess_contour * hole)
-{
- tess_contour *tmp_hole;
- tess_vertex *v1, *v2, *tmp_vertex;
- GLuint vertex1_cnt, vertex2_cnt, tmp_vertex_cnt;
- GLuint i, j, k;
- GLenum test = 0;
-
- /* find an edge connecting contour and hole not intersecting any other */
- /* edge belonging to either the contour or any of the other holes */
- for (v1 = contour->vertices, vertex1_cnt = contour->vertex_cnt, i = 0;
- i < vertex1_cnt; i++, v1 = v1->next) {
- for (v2 = hole->vertices, vertex2_cnt = hole->vertex_cnt, j = 0;
- j < vertex2_cnt; j++, v2 = v2->next) {
- /* does edge (v1,v2) intersect any edge of contour */
- for (tmp_vertex = contour->vertices, tmp_vertex_cnt =
- contour->vertex_cnt, k = 0; k < tmp_vertex_cnt;
- tmp_vertex = tmp_vertex->next, k++) {
- /* skip edge tests for edges directly connected */
- if (v1 == tmp_vertex || v1 == tmp_vertex->next)
- continue;
- test = edge_edge_intersect(v1, v2, tmp_vertex, tmp_vertex->next);
- if (test != GLU_NO_ERROR)
- break;
- }
- if (test == GLU_NO_ERROR) {
- /* does edge (v1,v2) intersect any edge of hole */
- for (tmp_vertex = hole->vertices,
- tmp_vertex_cnt = hole->vertex_cnt, k = 0;
- k < tmp_vertex_cnt; tmp_vertex = tmp_vertex->next, k++) {
- /* skip edge tests for edges directly connected */
- if (v2 == tmp_vertex || v2 == tmp_vertex->next)
- continue;
- test =
- edge_edge_intersect(v1, v2, tmp_vertex, tmp_vertex->next);
- if (test != GLU_NO_ERROR)
- break;
- }
- if (test == GLU_NO_ERROR) {
- /* does edge (v1,v2) intersect any other hole? */
- for (tmp_hole = hole->next;
- tmp_hole != NULL && tmp_hole->type == GLU_INTERIOR;
- tmp_hole = tmp_hole->next) {
- /* does edge (v1,v2) intersect any edge of hole */
- for (tmp_vertex = tmp_hole->vertices,
- tmp_vertex_cnt = tmp_hole->vertex_cnt, k = 0;
- k < tmp_vertex_cnt; tmp_vertex = tmp_vertex->next, k++) {
- test = edge_edge_intersect(v1, v2, tmp_vertex,
- tmp_vertex->next);
- if (test != GLU_NO_ERROR)
- break;
- }
- if (test != GLU_NO_ERROR)
- break;
- }
- }
- }
- if (test == GLU_NO_ERROR) {
- /* edge (v1,v2) is good for eliminating the hole */
- if (merge_hole_with_contour(tobj, contour, hole, v1, v2)
- == GLU_NO_ERROR)
- return GLU_NO_ERROR;
- else
- return GLU_ERROR;
- }
- }
- }
- /* other holes are blocking all possible connections of hole */
- /* with contour, we shift this hole as the last hole and retry */
- for (tmp_hole = hole;
- tmp_hole != NULL && tmp_hole->type == GLU_INTERIOR;
- tmp_hole = tmp_hole->next);
- contour->next = hole->next;
- hole->next->previous = contour;
- if (tmp_hole == NULL) {
- /* last EXTERIOR contour, shift hole as last contour */
- hole->next = NULL;
- hole->previous = tobj->last_contour;
- tobj->last_contour->next = hole;
- tobj->last_contour = hole;
- }
- else {
- tmp_hole->previous->next = hole;
- hole->previous = tmp_hole->previous;
- tmp_hole->previous = hole;
- hole->next = tmp_hole;
- }
- hole = contour->next;
- /* try once again - recurse */
- return cut_out_hole(tobj, contour, hole);
-}
-
-static GLenum
-merge_hole_with_contour(GLUtriangulatorObj * tobj,
- tess_contour * contour,
- tess_contour * hole,
- tess_vertex * v1, tess_vertex * v2)
-{
- tess_vertex *v1_new, *v2_new;
-
- /* make copies of v1 and v2, place them respectively after their originals */
- if ((v1_new = (tess_vertex *) malloc(sizeof(tess_vertex))) == NULL) {
- tess_call_user_error(tobj, GLU_OUT_OF_MEMORY);
- return GLU_ERROR;
- }
- if ((v2_new = (tess_vertex *) malloc(sizeof(tess_vertex))) == NULL) {
- tess_call_user_error(tobj, GLU_OUT_OF_MEMORY);
- return GLU_ERROR;
- }
- v1_new->edge_flag = GL_TRUE;
- v1_new->data = v1->data;
- v1_new->location[0] = v1->location[0];
- v1_new->location[1] = v1->location[1];
- v1_new->location[2] = v1->location[2];
- v1_new->x = v1->x;
- v1_new->y = v1->y;
- v1_new->shadow_vertex = v1;
- v1->shadow_vertex = v1_new;
- v1_new->next = v1->next;
- v1_new->previous = v1;
- v1->next->previous = v1_new;
- v1->next = v1_new;
- v2_new->edge_flag = GL_TRUE;
- v2_new->data = v2->data;
- v2_new->location[0] = v2->location[0];
- v2_new->location[1] = v2->location[1];
- v2_new->location[2] = v2->location[2];
- v2_new->x = v2->x;
- v2_new->y = v2->y;
- v2_new->shadow_vertex = v2;
- v2->shadow_vertex = v2_new;
- v2_new->next = v2->next;
- v2_new->previous = v2;
- v2->next->previous = v2_new;
- v2->next = v2_new;
- /* link together the two lists */
- v1->next = v2_new;
- v2_new->previous = v1;
- v2->next = v1_new;
- v1_new->previous = v2;
- /* update the vertex count of the contour */
- contour->vertex_cnt += hole->vertex_cnt + 2;
- /* remove the INTERIOR contour */
- contour->next = hole->next;
- if (hole->next != NULL)
- hole->next->previous = contour;
- free(hole);
- /* update tobj structure */
- --(tobj->contour_cnt);
- if (contour->last_vertex == v1)
- contour->last_vertex = v1_new;
- /* mark two vertices with edge_flag */
- v2->edge_flag = GL_FALSE;
- v1->edge_flag = GL_FALSE;
- return GLU_NO_ERROR;
-}
+++ /dev/null
-
-/*
- * Mesa 3-D graphics library
- * Version: 3.3
- * Copyright (C) 1995-2000 Brian Paul
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-
-#ifdef PC_HEADER
-#include "all.h"
-#else
-#include <stdio.h>
-#include <string.h>
-#include <math.h>
-#include "gluP.h"
-#endif
-
-
-/*
- * This code was contributed by Marc Buffat (buffat@mecaflu.ec-lyon.fr).
- * Thanks Marc!!!
- */
-
-
-
-/* implementation de gluProject et gluUnproject */
-/* M. Buffat 17/2/95 */
-
-
-
-/*
- * Transform a point (column vector) by a 4x4 matrix. I.e. out = m * in
- * Input: m - the 4x4 matrix
- * in - the 4x1 vector
- * Output: out - the resulting 4x1 vector.
- */
-static void
-transform_point(GLdouble out[4], const GLdouble m[16], const GLdouble in[4])
-{
-#define M(row,col) m[col*4+row]
- out[0] =
- M(0, 0) * in[0] + M(0, 1) * in[1] + M(0, 2) * in[2] + M(0, 3) * in[3];
- out[1] =
- M(1, 0) * in[0] + M(1, 1) * in[1] + M(1, 2) * in[2] + M(1, 3) * in[3];
- out[2] =
- M(2, 0) * in[0] + M(2, 1) * in[1] + M(2, 2) * in[2] + M(2, 3) * in[3];
- out[3] =
- M(3, 0) * in[0] + M(3, 1) * in[1] + M(3, 2) * in[2] + M(3, 3) * in[3];
-#undef M
-}
-
-
-
-
-/*
- * Perform a 4x4 matrix multiplication (product = a x b).
- * Input: a, b - matrices to multiply
- * Output: product - product of a and b
- */
-static void
-matmul(GLdouble * product, const GLdouble * a, const GLdouble * b)
-{
- /* This matmul was contributed by Thomas Malik */
- GLdouble temp[16];
- GLint i;
-
-#define A(row,col) a[(col<<2)+row]
-#define B(row,col) b[(col<<2)+row]
-#define T(row,col) temp[(col<<2)+row]
-
- /* i-te Zeile */
- for (i = 0; i < 4; i++) {
- T(i, 0) =
- A(i, 0) * B(0, 0) + A(i, 1) * B(1, 0) + A(i, 2) * B(2, 0) + A(i,
- 3) *
- B(3, 0);
- T(i, 1) =
- A(i, 0) * B(0, 1) + A(i, 1) * B(1, 1) + A(i, 2) * B(2, 1) + A(i,
- 3) *
- B(3, 1);
- T(i, 2) =
- A(i, 0) * B(0, 2) + A(i, 1) * B(1, 2) + A(i, 2) * B(2, 2) + A(i,
- 3) *
- B(3, 2);
- T(i, 3) =
- A(i, 0) * B(0, 3) + A(i, 1) * B(1, 3) + A(i, 2) * B(2, 3) + A(i,
- 3) *
- B(3, 3);
- }
-
-#undef A
-#undef B
-#undef T
- MEMCPY(product, temp, 16 * sizeof(GLdouble));
-}
-
-
-
-/*
- * Compute inverse of 4x4 transformation matrix.
- * Code contributed by Jacques Leroy jle@star.be
- * Return GL_TRUE for success, GL_FALSE for failure (singular matrix)
- */
-static GLboolean
-invert_matrix(const GLdouble * m, GLdouble * out)
-{
-/* NB. OpenGL Matrices are COLUMN major. */
-#define SWAP_ROWS(a, b) { GLdouble *_tmp = a; (a)=(b); (b)=_tmp; }
-#define MAT(m,r,c) (m)[(c)*4+(r)]
-
- GLdouble wtmp[4][8];
- GLdouble m0, m1, m2, m3, s;
- GLdouble *r0, *r1, *r2, *r3;
-
- r0 = wtmp[0], r1 = wtmp[1], r2 = wtmp[2], r3 = wtmp[3];
-
- r0[0] = MAT(m, 0, 0), r0[1] = MAT(m, 0, 1),
- r0[2] = MAT(m, 0, 2), r0[3] = MAT(m, 0, 3),
- r0[4] = 1.0, r0[5] = r0[6] = r0[7] = 0.0,
- r1[0] = MAT(m, 1, 0), r1[1] = MAT(m, 1, 1),
- r1[2] = MAT(m, 1, 2), r1[3] = MAT(m, 1, 3),
- r1[5] = 1.0, r1[4] = r1[6] = r1[7] = 0.0,
- r2[0] = MAT(m, 2, 0), r2[1] = MAT(m, 2, 1),
- r2[2] = MAT(m, 2, 2), r2[3] = MAT(m, 2, 3),
- r2[6] = 1.0, r2[4] = r2[5] = r2[7] = 0.0,
- r3[0] = MAT(m, 3, 0), r3[1] = MAT(m, 3, 1),
- r3[2] = MAT(m, 3, 2), r3[3] = MAT(m, 3, 3),
- r3[7] = 1.0, r3[4] = r3[5] = r3[6] = 0.0;
-
- /* choose pivot - or die */
- if (fabs(r3[0]) > fabs(r2[0]))
- SWAP_ROWS(r3, r2);
- if (fabs(r2[0]) > fabs(r1[0]))
- SWAP_ROWS(r2, r1);
- if (fabs(r1[0]) > fabs(r0[0]))
- SWAP_ROWS(r1, r0);
- if (0.0 == r0[0])
- return GL_FALSE;
-
- /* eliminate first variable */
- m1 = r1[0] / r0[0];
- m2 = r2[0] / r0[0];
- m3 = r3[0] / r0[0];
- s = r0[1];
- r1[1] -= m1 * s;
- r2[1] -= m2 * s;
- r3[1] -= m3 * s;
- s = r0[2];
- r1[2] -= m1 * s;
- r2[2] -= m2 * s;
- r3[2] -= m3 * s;
- s = r0[3];
- r1[3] -= m1 * s;
- r2[3] -= m2 * s;
- r3[3] -= m3 * s;
- s = r0[4];
- if (s != 0.0) {
- r1[4] -= m1 * s;
- r2[4] -= m2 * s;
- r3[4] -= m3 * s;
- }
- s = r0[5];
- if (s != 0.0) {
- r1[5] -= m1 * s;
- r2[5] -= m2 * s;
- r3[5] -= m3 * s;
- }
- s = r0[6];
- if (s != 0.0) {
- r1[6] -= m1 * s;
- r2[6] -= m2 * s;
- r3[6] -= m3 * s;
- }
- s = r0[7];
- if (s != 0.0) {
- r1[7] -= m1 * s;
- r2[7] -= m2 * s;
- r3[7] -= m3 * s;
- }
-
- /* choose pivot - or die */
- if (fabs(r3[1]) > fabs(r2[1]))
- SWAP_ROWS(r3, r2);
- if (fabs(r2[1]) > fabs(r1[1]))
- SWAP_ROWS(r2, r1);
- if (0.0 == r1[1])
- return GL_FALSE;
-
- /* eliminate second variable */
- m2 = r2[1] / r1[1];
- m3 = r3[1] / r1[1];
- r2[2] -= m2 * r1[2];
- r3[2] -= m3 * r1[2];
- r2[3] -= m2 * r1[3];
- r3[3] -= m3 * r1[3];
- s = r1[4];
- if (0.0 != s) {
- r2[4] -= m2 * s;
- r3[4] -= m3 * s;
- }
- s = r1[5];
- if (0.0 != s) {
- r2[5] -= m2 * s;
- r3[5] -= m3 * s;
- }
- s = r1[6];
- if (0.0 != s) {
- r2[6] -= m2 * s;
- r3[6] -= m3 * s;
- }
- s = r1[7];
- if (0.0 != s) {
- r2[7] -= m2 * s;
- r3[7] -= m3 * s;
- }
-
- /* choose pivot - or die */
- if (fabs(r3[2]) > fabs(r2[2]))
- SWAP_ROWS(r3, r2);
- if (0.0 == r2[2])
- return GL_FALSE;
-
- /* eliminate third variable */
- m3 = r3[2] / r2[2];
- r3[3] -= m3 * r2[3], r3[4] -= m3 * r2[4],
- r3[5] -= m3 * r2[5], r3[6] -= m3 * r2[6], r3[7] -= m3 * r2[7];
-
- /* last check */
- if (0.0 == r3[3])
- return GL_FALSE;
-
- s = 1.0 / r3[3]; /* now back substitute row 3 */
- r3[4] *= s;
- r3[5] *= s;
- r3[6] *= s;
- r3[7] *= s;
-
- m2 = r2[3]; /* now back substitute row 2 */
- s = 1.0 / r2[2];
- r2[4] = s * (r2[4] - r3[4] * m2), r2[5] = s * (r2[5] - r3[5] * m2),
- r2[6] = s * (r2[6] - r3[6] * m2), r2[7] = s * (r2[7] - r3[7] * m2);
- m1 = r1[3];
- r1[4] -= r3[4] * m1, r1[5] -= r3[5] * m1,
- r1[6] -= r3[6] * m1, r1[7] -= r3[7] * m1;
- m0 = r0[3];
- r0[4] -= r3[4] * m0, r0[5] -= r3[5] * m0,
- r0[6] -= r3[6] * m0, r0[7] -= r3[7] * m0;
-
- m1 = r1[2]; /* now back substitute row 1 */
- s = 1.0 / r1[1];
- r1[4] = s * (r1[4] - r2[4] * m1), r1[5] = s * (r1[5] - r2[5] * m1),
- r1[6] = s * (r1[6] - r2[6] * m1), r1[7] = s * (r1[7] - r2[7] * m1);
- m0 = r0[2];
- r0[4] -= r2[4] * m0, r0[5] -= r2[5] * m0,
- r0[6] -= r2[6] * m0, r0[7] -= r2[7] * m0;
-
- m0 = r0[1]; /* now back substitute row 0 */
- s = 1.0 / r0[0];
- r0[4] = s * (r0[4] - r1[4] * m0), r0[5] = s * (r0[5] - r1[5] * m0),
- r0[6] = s * (r0[6] - r1[6] * m0), r0[7] = s * (r0[7] - r1[7] * m0);
-
- MAT(out, 0, 0) = r0[4];
- MAT(out, 0, 1) = r0[5], MAT(out, 0, 2) = r0[6];
- MAT(out, 0, 3) = r0[7], MAT(out, 1, 0) = r1[4];
- MAT(out, 1, 1) = r1[5], MAT(out, 1, 2) = r1[6];
- MAT(out, 1, 3) = r1[7], MAT(out, 2, 0) = r2[4];
- MAT(out, 2, 1) = r2[5], MAT(out, 2, 2) = r2[6];
- MAT(out, 2, 3) = r2[7], MAT(out, 3, 0) = r3[4];
- MAT(out, 3, 1) = r3[5], MAT(out, 3, 2) = r3[6];
- MAT(out, 3, 3) = r3[7];
-
- return GL_TRUE;
-
-#undef MAT
-#undef SWAP_ROWS
-}
-
-
-
-/* projection du point (objx,objy,obz) sur l'ecran (winx,winy,winz) */
-GLint GLAPIENTRY
-gluProject(GLdouble objx, GLdouble objy, GLdouble objz,
- const GLdouble model[16], const GLdouble proj[16],
- const GLint viewport[4],
- GLdouble * winx, GLdouble * winy, GLdouble * winz)
-{
- /* matrice de transformation */
- GLdouble in[4], out[4];
-
- /* initilise la matrice et le vecteur a transformer */
- in[0] = objx;
- in[1] = objy;
- in[2] = objz;
- in[3] = 1.0;
- transform_point(out, model, in);
- transform_point(in, proj, out);
-
- /* d'ou le resultat normalise entre -1 et 1 */
- if (in[3] == 0.0)
- return GL_FALSE;
-
- in[0] /= in[3];
- in[1] /= in[3];
- in[2] /= in[3];
-
- /* en coordonnees ecran */
- *winx = viewport[0] + (1 + in[0]) * viewport[2] / 2;
- *winy = viewport[1] + (1 + in[1]) * viewport[3] / 2;
- /* entre 0 et 1 suivant z */
- *winz = (1 + in[2]) / 2;
- return GL_TRUE;
-}
-
-
-
-/* transformation du point ecran (winx,winy,winz) en point objet */
-GLint GLAPIENTRY
-gluUnProject(GLdouble winx, GLdouble winy, GLdouble winz,
- const GLdouble model[16], const GLdouble proj[16],
- const GLint viewport[4],
- GLdouble * objx, GLdouble * objy, GLdouble * objz)
-{
- /* matrice de transformation */
- GLdouble m[16], A[16];
- GLdouble in[4], out[4];
-
- /* transformation coordonnees normalisees entre -1 et 1 */
- in[0] = (winx - viewport[0]) * 2 / viewport[2] - 1.0;
- in[1] = (winy - viewport[1]) * 2 / viewport[3] - 1.0;
- in[2] = 2 * winz - 1.0;
- in[3] = 1.0;
-
- /* calcul transformation inverse */
- matmul(A, proj, model);
- if (!invert_matrix(A, m))
- return GL_FALSE;
-
- /* d'ou les coordonnees objets */
- transform_point(out, m, in);
- if (out[3] == 0.0)
- return GL_FALSE;
- *objx = out[0] / out[3];
- *objy = out[1] / out[3];
- *objz = out[2] / out[3];
- return GL_TRUE;
-}
-
-
-/*
- * New in GLU 1.3
- * This is like gluUnProject but also takes near and far DepthRange values.
- */
-#ifdef GLU_VERSION_1_3
-GLint GLAPIENTRY
-gluUnProject4(GLdouble winx, GLdouble winy, GLdouble winz, GLdouble clipw,
- const GLdouble modelMatrix[16],
- const GLdouble projMatrix[16],
- const GLint viewport[4],
- GLclampd nearZ, GLclampd farZ,
- GLdouble * objx, GLdouble * objy, GLdouble * objz,
- GLdouble * objw)
-{
- /* matrice de transformation */
- GLdouble m[16], A[16];
- GLdouble in[4], out[4];
- GLdouble z = nearZ + winz * (farZ - nearZ);
-
- /* transformation coordonnees normalisees entre -1 et 1 */
- in[0] = (winx - viewport[0]) * 2 / viewport[2] - 1.0;
- in[1] = (winy - viewport[1]) * 2 / viewport[3] - 1.0;
- in[2] = 2.0 * z - 1.0;
- in[3] = clipw;
-
- /* calcul transformation inverse */
- matmul(A, projMatrix, modelMatrix);
- if (!invert_matrix(A, m))
- return GL_FALSE;
-
- /* d'ou les coordonnees objets */
- transform_point(out, m, in);
- if (out[3] == 0.0)
- return GL_FALSE;
- *objx = out[0] / out[3];
- *objy = out[1] / out[3];
- *objz = out[2] / out[3];
- *objw = out[3];
- return GL_TRUE;
-}
-#endif
+++ /dev/null
-
-/*
- * Mesa 3-D graphics library
- * Version: 3.3
- * Copyright (C) 1999-2000 Brian Paul
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-
-/* TODO:
- * texture coordinate support
- * flip normals according to orientation
- * there's still some inside/outside orientation bugs in possibly all
- * but the sphere function
- */
-
-
-#ifdef PC_HEADER
-#include "all.h"
-#else
-#include <math.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include "gluP.h"
-#endif
-
-
-
-#ifndef M_PI
-# define M_PI (3.1415926)
-#endif
-
-
-/*
- * Convert degrees to radians:
- */
-#define DEG_TO_RAD(A) ((A)*(M_PI/180.0))
-
-
-/*
- * Sin and Cos for degree angles:
- */
-#define SIND( A ) sin( (A)*(M_PI/180.0) )
-#define COSD( A) cos( (A)*(M_PI/180.0) )
-
-
-/*
- * Texture coordinates if texture flag is set
- */
-#define TXTR_COORD(x,y) if (qobj->TextureFlag) glTexCoord2f(x,y);
-
-
-
-struct GLUquadric
-{
- GLenum DrawStyle; /* GLU_FILL, LINE, SILHOUETTE, or POINT */
- GLenum Orientation; /* GLU_INSIDE or GLU_OUTSIDE */
- GLboolean TextureFlag; /* Generate texture coords? */
- GLenum Normals; /* GLU_NONE, GLU_FLAT, or GLU_SMOOTH */
- void (GLCALLBACK * ErrorFunc) (GLenum err); /* Error handler callback function */
-};
-
-
-
-/*
- * Process a GLU error.
- */
-static void
-quadric_error(GLUquadricObj * qobj, GLenum error, const char *msg)
-{
- /* Call the error call back function if any */
- if (qobj->ErrorFunc) {
- (*qobj->ErrorFunc) (error);
- }
- /* Print a message to stdout if MESA_DEBUG variable is defined */
- if (getenv("MESA_DEBUG")) {
- fprintf(stderr, "GLUError: %s: %s\n", (char *) gluErrorString(error),
- msg);
- }
-}
-
-
-
-
-GLUquadricObj *GLAPIENTRY
-gluNewQuadric(void)
-{
- GLUquadricObj *q;
-
- q = (GLUquadricObj *) malloc(sizeof(struct GLUquadric));
- if (q) {
- q->DrawStyle = GLU_FILL;
- q->Orientation = GLU_OUTSIDE;
- q->TextureFlag = GL_FALSE;
- q->Normals = GLU_SMOOTH;
- q->ErrorFunc = NULL;
- }
- return q;
-}
-
-
-
-void GLAPIENTRY
-gluDeleteQuadric(GLUquadricObj * state)
-{
- if (state) {
- free((void *) state);
- }
-}
-
-
-
-/*
- * Set the drawing style to be GLU_FILL, GLU_LINE, GLU_SILHOUETTE,
- * or GLU_POINT.
- */
-void GLAPIENTRY
-gluQuadricDrawStyle(GLUquadricObj * quadObject, GLenum drawStyle)
-{
- if (quadObject && (drawStyle == GLU_FILL || drawStyle == GLU_LINE
- || drawStyle == GLU_SILHOUETTE
- || drawStyle == GLU_POINT)) {
- quadObject->DrawStyle = drawStyle;
- }
- else {
- quadric_error(quadObject, GLU_INVALID_ENUM, "qluQuadricDrawStyle");
- }
-}
-
-
-
-/*
- * Set the orientation to GLU_INSIDE or GLU_OUTSIDE.
- */
-void GLAPIENTRY
-gluQuadricOrientation(GLUquadricObj * quadObject, GLenum orientation)
-{
- if (quadObject
- && (orientation == GLU_INSIDE || orientation == GLU_OUTSIDE)) {
- quadObject->Orientation = orientation;
- }
- else {
- quadric_error(quadObject, GLU_INVALID_ENUM, "qluQuadricOrientation");
- }
-}
-
-
-
-/*
- * Set the error handler callback function.
- */
-void GLAPIENTRY
-gluQuadricCallback(GLUquadricObj * qobj,
- GLenum which, void (GLCALLBACK * fn) ())
-{
- /*
- * UGH, this is a mess! I thought ANSI was a standard.
- */
- if (qobj && which == GLU_ERROR) {
-#ifdef __CYGWIN32__
- qobj->ErrorFunc = (void (GLCALLBACKPCAST) (GLenum)) fn;
-#elif defined(OPENSTEP)
- qobj->ErrorFunc = (void (*)(GLenum)) fn;
-#elif defined(_WIN32)
- qobj->ErrorFunc = (void (GLCALLBACK *) (int)) fn;
-#elif defined(__STORM__)
- qobj->ErrorFunc = (void (GLCALLBACK *) (GLenum)) fn;
-#elif defined(__BEOS__)
- qobj->ErrorFunc = (void (*)(GLenum)) fn;
-#else
- qobj->ErrorFunc = (void (GLCALLBACK *) ()) fn;
-#endif
- }
-}
-
-
-void GLAPIENTRY
-gluQuadricNormals(GLUquadricObj * quadObject, GLenum normals)
-{
- if (quadObject
- && (normals == GLU_NONE || normals == GLU_FLAT
- || normals == GLU_SMOOTH)) {
- quadObject->Normals = normals;
- }
-}
-
-
-void GLAPIENTRY
-gluQuadricTexture(GLUquadricObj * quadObject, GLboolean textureCoords)
-{
- if (quadObject) {
- quadObject->TextureFlag = textureCoords;
- }
-}
-
-
-
-
-/*
- * Call glNormal3f after scaling normal to unit length.
- */
-static void
-normal3f(GLfloat x, GLfloat y, GLfloat z)
-{
-}
-
-
-
-void GLAPIENTRY
-gluCylinder(GLUquadricObj * qobj,
- GLdouble baseRadius, GLdouble topRadius,
- GLdouble height, GLint slices, GLint stacks)
-{
- GLdouble da, r, dr, dz;
- GLfloat x, y, z, nz, nsign;
- GLint i, j;
-
- if (qobj->Orientation == GLU_INSIDE) {
- nsign = -1.0;
- }
- else {
- nsign = 1.0;
- }
-
- da = 2.0 * M_PI / slices;
- dr = (topRadius - baseRadius) / stacks;
- dz = height / stacks;
- nz = (baseRadius - topRadius) / height; /* Z component of normal vectors */
-
- if (qobj->DrawStyle == GLU_POINT) {
- glBegin(GL_POINTS);
- for (i = 0; i < slices; i++) {
- x = cos(i * da);
- y = sin(i * da);
- normal3f(x * nsign, y * nsign, nz * nsign);
-
- z = 0.0;
- r = baseRadius;
- for (j = 0; j <= stacks; j++) {
- glVertex3f(x * r, y * r, z);
- z += dz;
- r += dr;
- }
- }
- glEnd();
- }
- else if (qobj->DrawStyle == GLU_LINE || qobj->DrawStyle == GLU_SILHOUETTE) {
- /* Draw rings */
- if (qobj->DrawStyle == GLU_LINE) {
- z = 0.0;
- r = baseRadius;
- for (j = 0; j <= stacks; j++) {
- glBegin(GL_LINE_LOOP);
- for (i = 0; i < slices; i++) {
- x = cos(i * da);
- y = sin(i * da);
- normal3f(x * nsign, y * nsign, nz * nsign);
- glVertex3f(x * r, y * r, z);
- }
- glEnd();
- z += dz;
- r += dr;
- }
- }
- else {
- /* draw one ring at each end */
- if (baseRadius != 0.0) {
- glBegin(GL_LINE_LOOP);
- for (i = 0; i < slices; i++) {
- x = cos(i * da);
- y = sin(i * da);
- normal3f(x * nsign, y * nsign, nz * nsign);
- glVertex3f(x * baseRadius, y * baseRadius, 0.0);
- }
- glEnd();
- glBegin(GL_LINE_LOOP);
- for (i = 0; i < slices; i++) {
- x = cos(i * da);
- y = sin(i * da);
- normal3f(x * nsign, y * nsign, nz * nsign);
- glVertex3f(x * topRadius, y * topRadius, height);
- }
- glEnd();
- }
- }
- /* draw length lines */
- glBegin(GL_LINES);
- for (i = 0; i < slices; i++) {
- x = cos(i * da);
- y = sin(i * da);
- normal3f(x * nsign, y * nsign, nz * nsign);
- glVertex3f(x * baseRadius, y * baseRadius, 0.0);
- glVertex3f(x * topRadius, y * topRadius, height);
- }
- glEnd();
- }
- else if (qobj->DrawStyle == GLU_FILL) {
- GLfloat ds = 1.0 / slices;
- GLfloat dt = 1.0 / stacks;
- GLfloat t = 0.0;
- z = 0.0;
- r = baseRadius;
- for (j = 0; j < stacks; j++) {
- GLfloat s = 0.0;
- glBegin(GL_QUAD_STRIP);
- for (i = 0; i <= slices; i++) {
- GLfloat x, y;
- if (i == slices) {
- x = sin(0.0);
- y = cos(0.0);
- }
- else {
- x = sin(i * da);
- y = cos(i * da);
- }
- if (nsign == 1.0) {
- normal3f(x * nsign, y * nsign, nz * nsign);
- TXTR_COORD(s, t);
- glVertex3f(x * r, y * r, z);
- normal3f(x * nsign, y * nsign, nz * nsign);
- TXTR_COORD(s, t + dt);
- glVertex3f(x * (r + dr), y * (r + dr), z + dz);
- }
- else {
- normal3f(x * nsign, y * nsign, nz * nsign);
- TXTR_COORD(s, t);
- glVertex3f(x * r, y * r, z);
- normal3f(x * nsign, y * nsign, nz * nsign);
- TXTR_COORD(s, t + dt);
- glVertex3f(x * (r + dr), y * (r + dr), z + dz);
- }
- s += ds;
- } /* for slices */
- glEnd();
- r += dr;
- t += dt;
- z += dz;
- } /* for stacks */
- }
-}
-
-
-
-
-
-void GLAPIENTRY
-gluSphere(GLUquadricObj * qobj, GLdouble radius, GLint slices, GLint stacks)
-{
- GLfloat rho, drho, theta, dtheta;
- GLfloat x, y, z;
- GLfloat s, t, ds, dt;
- GLint i, j, imin, imax;
- GLboolean normals;
- GLfloat nsign;
-
- if (qobj->Normals == GLU_NONE) {
- normals = GL_FALSE;
- }
- else {
- normals = GL_TRUE;
- }
- if (qobj->Orientation == GLU_INSIDE) {
- nsign = -1.0;
- }
- else {
- nsign = 1.0;
- }
-
- drho = M_PI / (GLfloat) stacks;
- dtheta = 2.0 * M_PI / (GLfloat) slices;
-
- /* texturing: s goes from 0.0/0.25/0.5/0.75/1.0 at +y/+x/-y/-x/+y axis */
- /* t goes from -1.0/+1.0 at z = -radius/+radius (linear along longitudes) */
- /* cannot use triangle fan on texturing (s coord. at top/bottom tip varies) */
-
- if (qobj->DrawStyle == GLU_FILL) {
- if (!qobj->TextureFlag) {
- /* draw +Z end as a triangle fan */
- glBegin(GL_TRIANGLE_FAN);
-/* glNormal3f(0.0, 0.0, 1.0); */
- glVertex3f(0.0, 0.0, nsign * radius);
- for (j = 0; j <= slices; j++) {
- theta = (j == slices) ? 0.0 : j * dtheta;
- x = -sin(theta) * sin(drho);
- y = cos(theta) * sin(drho);
- z = nsign * cos(drho);
- glVertex3f(x * radius, y * radius, z * radius);
- }
- glEnd();
- }
-
- ds = 1.0 / slices;
- dt = 1.0 / stacks;
- t = 1.0; /* because loop now runs from 0 */
- if (qobj->TextureFlag) {
- imin = 0;
- imax = stacks;
- }
- else {
- imin = 1;
- imax = stacks - 1;
- }
-
- /* draw intermediate stacks as quad strips */
- for (i = imin; i < imax; i++) {
- rho = i * drho;
- glBegin(GL_QUAD_STRIP);
- s = 0.0;
- for (j = 0; j <= slices; j++) {
- theta = (j == slices) ? 0.0 : j * dtheta;
- x = -sin(theta) * sin(rho);
- y = cos(theta) * sin(rho);
- z = nsign * cos(rho);
- TXTR_COORD(s, t);
- glVertex3f(x * radius, y * radius, z * radius);
- x = -sin(theta) * sin(rho + drho);
- y = cos(theta) * sin(rho + drho);
- z = nsign * cos(rho + drho);
- TXTR_COORD(s, t - dt);
- s += ds;
- glVertex3f(x * radius, y * radius, z * radius);
- }
- glEnd();
- t -= dt;
- }
-
- if (!qobj->TextureFlag) {
- /* draw -Z end as a triangle fan */
- glBegin(GL_TRIANGLE_FAN);
- glVertex3f(0.0, 0.0, -radius * nsign);
- rho = M_PI - drho;
- s = 1.0;
- t = dt;
- for (j = slices; j >= 0; j--) {
- theta = (j == slices) ? 0.0 : j * dtheta;
- x = -sin(theta) * sin(rho);
- y = cos(theta) * sin(rho);
- z = nsign * cos(rho);
- s -= ds;
- glVertex3f(x * radius, y * radius, z * radius);
- }
- glEnd();
- }
- }
- else if (qobj->DrawStyle == GLU_LINE || qobj->DrawStyle == GLU_SILHOUETTE) {
- /* draw stack lines */
- for (i = 1; i < stacks; i++) { /* stack line at i==stacks-1 was missing here */
- rho = i * drho;
- glBegin(GL_LINE_LOOP);
- for (j = 0; j < slices; j++) {
- theta = j * dtheta;
- x = cos(theta) * sin(rho);
- y = sin(theta) * sin(rho);
- z = cos(rho);
- glVertex3f(x * radius, y * radius, z * radius);
- }
- glEnd();
- }
- /* draw slice lines */
- for (j = 0; j < slices; j++) {
- theta = j * dtheta;
- glBegin(GL_LINE_STRIP);
- for (i = 0; i <= stacks; i++) {
- rho = i * drho;
- x = cos(theta) * sin(rho);
- y = sin(theta) * sin(rho);
- z = cos(rho);
- glVertex3f(x * radius, y * radius, z * radius);
- }
- glEnd();
- }
- }
- else if (qobj->DrawStyle == GLU_POINT) {
- /* top and bottom-most points */
- glBegin(GL_POINTS);
- glVertex3f(0.0, 0.0, radius);
- glVertex3f(0.0, 0.0, -radius);
-
- /* loop over stacks */
- for (i = 1; i < stacks - 1; i++) {
- rho = i * drho;
- for (j = 0; j < slices; j++) {
- theta = j * dtheta;
- x = cos(theta) * sin(rho);
- y = sin(theta) * sin(rho);
- z = cos(rho);
- glVertex3f(x * radius, y * radius, z * radius);
- }
- }
- glEnd();
- }
-
-}
-
-
-
-void GLAPIENTRY
-gluDisk(GLUquadricObj * qobj,
- GLdouble innerRadius, GLdouble outerRadius, GLint slices, GLint loops)
-{
- GLfloat da, dr;
-#if 0
- GLdouble a, da;
- GLfloat r, dr;
- GLfloat x, y;
- GLfloat r1, r2, dtc;
- GLint s, l;
-#endif
-
-
- da = 2.0 * M_PI / slices;
- dr = (outerRadius - innerRadius) / (GLfloat) loops;
-
- switch (qobj->DrawStyle) {
- case GLU_FILL:
- {
- /* texture of a gluDisk is a cut out of the texture unit square
- * x, y in [-outerRadius, +outerRadius]; s, t in [0, 1]
- * (linear mapping)
- */
- GLfloat dtc = 2.0f * outerRadius;
- GLfloat sa, ca;
- GLfloat r1 = innerRadius;
- GLint l;
- for (l = 0; l < loops; l++) {
- GLfloat r2 = r1 + dr;
- if (qobj->Orientation == GLU_OUTSIDE) {
- GLint s;
- glBegin(GL_QUAD_STRIP);
- for (s = 0; s <= slices; s++) {
- GLfloat a;
- if (s == slices)
- a = 0.0;
- else
- a = s * da;
- sa = sin(a);
- ca = cos(a);
- TXTR_COORD(0.5 + sa * r2 / dtc, 0.5 + ca * r2 / dtc);
- glVertex2f(r2 * sa, r2 * ca);
- TXTR_COORD(0.5 + sa * r1 / dtc, 0.5 + ca * r1 / dtc);
- glVertex2f(r1 * sa, r1 * ca);
- }
- glEnd();
- }
- else {
- GLint s;
- glBegin(GL_QUAD_STRIP);
- for (s = slices; s >= 0; s--) {
- GLfloat a;
- if (s == slices)
- a = 0.0;
- else
- a = s * da;
- sa = sin(a);
- ca = cos(a);
- TXTR_COORD(0.5 - sa * r2 / dtc, 0.5 + ca * r2 / dtc);
- glVertex2f(r2 * sa, r2 * ca);
- TXTR_COORD(0.5 - sa * r1 / dtc, 0.5 + ca * r1 / dtc);
- glVertex2f(r1 * sa, r1 * ca);
- }
- glEnd();
- }
- r1 = r2;
- }
- break;
- }
- case GLU_LINE:
- {
- GLint l, s;
- /* draw loops */
- for (l = 0; l <= loops; l++) {
- GLfloat r = innerRadius + l * dr;
- glBegin(GL_LINE_LOOP);
- for (s = 0; s < slices; s++) {
- GLfloat a = s * da;
- glVertex2f(r * sin(a), r * cos(a));
- }
- glEnd();
- }
- /* draw spokes */
- for (s = 0; s < slices; s++) {
- GLfloat a = s * da;
- GLfloat x = sin(a);
- GLfloat y = cos(a);
- glBegin(GL_LINE_STRIP);
- for (l = 0; l <= loops; l++) {
- GLfloat r = innerRadius + l * dr;
- glVertex2f(r * x, r * y);
- }
- glEnd();
- }
- break;
- }
- case GLU_POINT:
- {
- GLint s;
- glBegin(GL_POINTS);
- for (s = 0; s < slices; s++) {
- GLfloat a = s * da;
- GLfloat x = sin(a);
- GLfloat y = cos(a);
- GLint l;
- for (l = 0; l <= loops; l++) {
- GLfloat r = innerRadius * l * dr;
- glVertex2f(r * x, r * y);
- }
- }
- glEnd();
- break;
- }
- case GLU_SILHOUETTE:
- {
- if (innerRadius != 0.0) {
- GLfloat a;
- glBegin(GL_LINE_LOOP);
- for (a = 0.0; a < 2.0 * M_PI; a += da) {
- GLfloat x = innerRadius * sin(a);
- GLfloat y = innerRadius * cos(a);
- glVertex2f(x, y);
- }
- glEnd();
- }
- {
- GLfloat a;
- glBegin(GL_LINE_LOOP);
- for (a = 0; a < 2.0 * M_PI; a += da) {
- GLfloat x = outerRadius * sin(a);
- GLfloat y = outerRadius * cos(a);
- glVertex2f(x, y);
- }
- glEnd();
- }
- break;
- }
- default:
- abort();
- }
-}
-
-
-
-void GLAPIENTRY
-gluPartialDisk(GLUquadricObj * qobj, GLdouble innerRadius,
- GLdouble outerRadius, GLint slices, GLint loops,
- GLdouble startAngle, GLdouble sweepAngle)
-{
- if (qobj->DrawStyle == GLU_POINT) {
- GLint loop, slice;
- GLdouble radius, delta_radius;
- GLdouble angle, delta_angle;
- delta_radius = (outerRadius - innerRadius) / (loops - 1);
- delta_angle = DEG_TO_RAD((sweepAngle) / (slices - 1));
- glBegin(GL_POINTS);
- radius = innerRadius;
- for (loop = 0; loop < loops; loop++) {
- angle = DEG_TO_RAD(startAngle);
- for (slice = 0; slice < slices; slice++) {
- glVertex2f(radius * sin(angle), radius * cos(angle));
- angle += delta_angle;
- }
- radius += delta_radius;
- }
- glEnd();
- }
- else if (qobj->DrawStyle == GLU_LINE) {
- GLint loop, slice;
- GLdouble radius, delta_radius;
- GLdouble angle, delta_angle;
- delta_radius = (outerRadius - innerRadius) / loops;
- delta_angle = DEG_TO_RAD(sweepAngle / slices);
- /* draw rings */
- radius = innerRadius;
- for (loop = 0; loop < loops; loop++) {
- angle = DEG_TO_RAD(startAngle);
- glBegin(GL_LINE_STRIP);
- for (slice = 0; slice <= slices; slice++) {
- glVertex2f(radius * sin(angle), radius * cos(angle));
- angle += delta_angle;
- }
- glEnd();
- radius += delta_radius;
- }
- /* draw spokes */
- angle = DEG_TO_RAD(startAngle);
- for (slice = 0; slice <= slices; slice++) {
- radius = innerRadius;
- glBegin(GL_LINE_STRIP);
- for (loop = 0; loop < loops; loop++) {
- glVertex2f(radius * sin(angle), radius * cos(angle));
- radius += delta_radius;
- }
- glEnd();
- angle += delta_angle;
- }
- }
- else if (qobj->DrawStyle == GLU_SILHOUETTE) {
- GLint slice;
- GLdouble angle, delta_angle;
- delta_angle = DEG_TO_RAD(sweepAngle / slices);
- /* draw outer ring */
- glBegin(GL_LINE_STRIP);
- angle = DEG_TO_RAD(startAngle);
- for (slice = 0; slice <= slices; slice++) {
- glVertex2f(outerRadius * sin(angle), outerRadius * cos(angle));
- angle += delta_angle;
- }
- glEnd();
- /* draw inner ring */
- if (innerRadius > 0.0) {
- glBegin(GL_LINE_STRIP);
- angle = DEG_TO_RAD(startAngle);
- for (slice = 0; slice < slices; slice++) {
- glVertex2f(innerRadius * sin(angle), innerRadius * cos(angle));
- angle += delta_angle;
- }
- glEnd();
- }
- /* draw spokes */
- if (sweepAngle < 360.0) {
- GLdouble stopAngle = startAngle + sweepAngle;
- glBegin(GL_LINES);
- glVertex2f(innerRadius * SIND(startAngle),
- innerRadius * COSD(startAngle));
- glVertex2f(outerRadius * SIND(startAngle),
- outerRadius * COSD(startAngle));
- glVertex2f(innerRadius * SIND(stopAngle),
- innerRadius * COSD(stopAngle));
- glVertex2f(outerRadius * SIND(stopAngle),
- outerRadius * COSD(stopAngle));
- glEnd();
- }
- }
- else if (qobj->DrawStyle == GLU_FILL) {
- GLint loop, slice;
- GLdouble radius, delta_radius;
- GLdouble angle, delta_angle;
- delta_radius = (outerRadius - innerRadius) / loops;
- delta_angle = DEG_TO_RAD(sweepAngle / slices);
- radius = innerRadius;
- for (loop = 0; loop < loops; loop++) {
- glBegin(GL_QUAD_STRIP);
- angle = DEG_TO_RAD(startAngle);
- for (slice = 0; slice <= slices; slice++) {
- if (qobj->Orientation == GLU_OUTSIDE) {
- glVertex2f((radius + delta_radius) * sin(angle),
- (radius + delta_radius) * cos(angle));
- glVertex2f(radius * sin(angle), radius * cos(angle));
- }
- else {
- glVertex2f(radius * sin(angle), radius * cos(angle));
- glVertex2f((radius + delta_radius) * sin(angle),
- (radius + delta_radius) * cos(angle));
- }
- angle += delta_angle;
- }
- glEnd();
- radius += delta_radius;
- }
- }
-}
+++ /dev/null
-
-/*
- * Mesa 3-D graphics library
- * Version: 3.3
- * Copyright (C) 1995-2000 Brian Paul
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-
-/*
- * This file is part of the polygon tesselation code contributed by
- * Bogdan Sikorski
- */
-
-
-#ifdef PC_HEADER
-#include "all.h"
-#else
-#include <math.h>
-#include <stdlib.h>
-#include "tess.h"
-#endif
-
-
-/*
- * This is ugly, but seems the easiest way to do things to make the
- * code work under YellowBox for Windows
- */
-#if defined(OPENSTEP) && defined(CALLBACK)
-#undef CALLBACK
-#define CALLBACK
-#endif
-
-
-static void delete_contours(GLUtriangulatorObj *);
-
-#ifdef __CYGWIN32__
-#define _CALLBACK
-#else
-#define _CALLBACK GLCALLBACK
-#endif
-
-
-static void
-init_callbacks(tess_callbacks * callbacks)
-{
- callbacks->begin = (void (_CALLBACK *) (GLenum)) 0;
- callbacks->edgeFlag = (void (_CALLBACK *) (GLboolean)) 0;
- callbacks->vertex = (void (_CALLBACK *) (void *)) 0;
- callbacks->end = (void (_CALLBACK *) (void)) 0;
- callbacks->error = (void (_CALLBACK *) (GLenum)) 0;
-}
-
-void
-tess_call_user_error(GLUtriangulatorObj * tobj, GLenum gluerr)
-{
- if (tobj->error == GLU_NO_ERROR)
- tobj->error = gluerr;
- if (tobj->callbacks.error != NULL)
- (tobj->callbacks.error) (gluerr);
-}
-
-GLUtriangulatorObj *GLAPIENTRY
-gluNewTess(void)
-{
- GLUtriangulatorObj *tobj;
-
- if ((tobj = (GLUtriangulatorObj *)
- malloc(sizeof(struct GLUtesselator))) == NULL)
- return NULL;
- tobj->contours = tobj->last_contour = NULL;
- init_callbacks(&tobj->callbacks);
- tobj->error = GLU_NO_ERROR;
- tobj->current_polygon = NULL;
- tobj->contour_cnt = 0;
- return tobj;
-}
-
-
-void GLAPIENTRY
-gluTessCallback(GLUtriangulatorObj * tobj, GLenum which,
- void (GLCALLBACK * fn) ())
-{
- switch (which) {
- case GLU_BEGIN:
- tobj->callbacks.begin = (void (_CALLBACK *) (GLenum)) fn;
- break;
- case GLU_EDGE_FLAG:
- tobj->callbacks.edgeFlag = (void (_CALLBACK *) (GLboolean)) fn;
- break;
- case GLU_VERTEX:
- tobj->callbacks.vertex = (void (_CALLBACK *) (void *)) fn;
- break;
- case GLU_END:
- tobj->callbacks.end = (void (_CALLBACK *) (void)) fn;
- break;
- case GLU_ERROR:
- tobj->callbacks.error = (void (_CALLBACK *) (GLenum)) fn;
- break;
- default:
- tobj->error = GLU_INVALID_ENUM;
- break;
- }
-}
-
-
-
-void GLAPIENTRY
-gluDeleteTess(GLUtriangulatorObj * tobj)
-{
- if (tobj->error == GLU_NO_ERROR && tobj->contour_cnt)
- /* was gluEndPolygon called? */
- tess_call_user_error(tobj, GLU_TESS_ERROR1);
- /* delete all internal structures */
- delete_contours(tobj);
- free(tobj);
-}
-
-
-void GLAPIENTRY
-gluBeginPolygon(GLUtriangulatorObj * tobj)
-{
-/*
- if(tobj->error!=GLU_NO_ERROR)
- return;
-*/
- tobj->error = GLU_NO_ERROR;
- if (tobj->current_polygon != NULL) {
- /* gluEndPolygon was not called */
- tess_call_user_error(tobj, GLU_TESS_ERROR1);
- /* delete all internal structures */
- delete_contours(tobj);
- }
- else {
- if ((tobj->current_polygon =
- (tess_polygon *) malloc(sizeof(tess_polygon))) == NULL) {
- tess_call_user_error(tobj, GLU_OUT_OF_MEMORY);
- return;
- }
- tobj->current_polygon->vertex_cnt = 0;
- tobj->current_polygon->vertices =
- tobj->current_polygon->last_vertex = NULL;
- }
-}
-
-
-void GLAPIENTRY
-gluEndPolygon(GLUtriangulatorObj * tobj)
-{
- /*tess_contour *contour_ptr; */
-
- /* there was an error */
- if (tobj->error != GLU_NO_ERROR)
- goto end;
-
- /* check if gluBeginPolygon was called */
- if (tobj->current_polygon == NULL) {
- tess_call_user_error(tobj, GLU_TESS_ERROR2);
- return;
- }
- tess_test_polygon(tobj);
- /* there was an error */
- if (tobj->error != GLU_NO_ERROR)
- goto end;
-
- /* any real contours? */
- if (tobj->contour_cnt == 0) {
- /* delete all internal structures */
- delete_contours(tobj);
- return;
- }
- tess_find_contour_hierarchies(tobj);
- /* there was an error */
- if (tobj->error != GLU_NO_ERROR)
- goto end;
-
- tess_handle_holes(tobj);
- /* there was an error */
- if (tobj->error != GLU_NO_ERROR)
- goto end;
-
- /* if no callbacks, nothing to do */
- if (tobj->callbacks.begin != NULL && tobj->callbacks.vertex != NULL &&
- tobj->callbacks.end != NULL) {
- if (tobj->callbacks.edgeFlag == NULL)
- tess_tesselate(tobj);
- else
- tess_tesselate_with_edge_flag(tobj);
- }
-
- end:
- /* delete all internal structures */
- delete_contours(tobj);
-}
-
-
-void GLAPIENTRY
-gluNextContour(GLUtriangulatorObj * tobj, GLenum type)
-{
- if (tobj->error != GLU_NO_ERROR)
- return;
- if (tobj->current_polygon == NULL) {
- tess_call_user_error(tobj, GLU_TESS_ERROR2);
- return;
- }
- /* first contour? */
- if (tobj->current_polygon->vertex_cnt)
- tess_test_polygon(tobj);
-}
-
-
-void GLAPIENTRY
-gluTessVertex(GLUtriangulatorObj * tobj, GLdouble v[3], void *data)
-{
- tess_polygon *polygon = tobj->current_polygon;
- tess_vertex *last_vertex_ptr;
-
- if (tobj->error != GLU_NO_ERROR)
- return;
- if (polygon == NULL) {
- tess_call_user_error(tobj, GLU_TESS_ERROR2);
- return;
- }
- last_vertex_ptr = polygon->last_vertex;
- if (last_vertex_ptr == NULL) {
- if ((last_vertex_ptr = (tess_vertex *)
- malloc(sizeof(tess_vertex))) == NULL) {
- tess_call_user_error(tobj, GLU_OUT_OF_MEMORY);
- return;
- }
- polygon->vertices = last_vertex_ptr;
- polygon->last_vertex = last_vertex_ptr;
- last_vertex_ptr->data = data;
- last_vertex_ptr->location[0] = v[0];
- last_vertex_ptr->location[1] = v[1];
- last_vertex_ptr->location[2] = v[2];
- last_vertex_ptr->next = NULL;
- last_vertex_ptr->previous = NULL;
- ++(polygon->vertex_cnt);
- }
- else {
- tess_vertex *vertex_ptr;
-
- /* same point twice? */
- if (fabs(last_vertex_ptr->location[0] - v[0]) < EPSILON &&
- fabs(last_vertex_ptr->location[1] - v[1]) < EPSILON &&
- fabs(last_vertex_ptr->location[2] - v[2]) < EPSILON) {
- tess_call_user_error(tobj, GLU_TESS_ERROR6);
- return;
- }
- if ((vertex_ptr = (tess_vertex *)
- malloc(sizeof(tess_vertex))) == NULL) {
- tess_call_user_error(tobj, GLU_OUT_OF_MEMORY);
- return;
- }
- vertex_ptr->data = data;
- vertex_ptr->location[0] = v[0];
- vertex_ptr->location[1] = v[1];
- vertex_ptr->location[2] = v[2];
- vertex_ptr->next = NULL;
- vertex_ptr->previous = last_vertex_ptr;
- ++(polygon->vertex_cnt);
- last_vertex_ptr->next = vertex_ptr;
- polygon->last_vertex = vertex_ptr;
- }
-}
-
-
-static void
-delete_contours(GLUtriangulatorObj * tobj)
-{
- tess_polygon *polygon = tobj->current_polygon;
- tess_contour *contour, *contour_tmp;
- tess_vertex *vertex, *vertex_tmp;
-
- /* remove current_polygon list - if exists due to detected error */
- if (polygon != NULL) {
- if (polygon->vertices) {
- for (vertex = polygon->vertices; vertex != polygon->last_vertex;) {
- vertex_tmp = vertex->next;
- free(vertex);
- vertex = vertex_tmp;
- }
- free(vertex);
- }
- free(polygon);
- tobj->current_polygon = NULL;
- }
- /* remove all contour data */
- for (contour = tobj->contours; contour != NULL;) {
- for (vertex = contour->vertices; vertex != contour->last_vertex;) {
- vertex_tmp = vertex->next;
- free(vertex);
- vertex = vertex_tmp;
- }
- free(vertex);
- contour_tmp = contour->next;
- free(contour);
- contour = contour_tmp;
- }
- tobj->contours = tobj->last_contour = NULL;
- tobj->contour_cnt = 0;
-}
-
-
-void GLAPIENTRY
-gluTessNormal(GLUtesselator *tess, GLdouble valueX, GLdouble valueY, GLdouble valueZ)
-{
- /* dummy function */
- (void) tess;
- (void) valueX;
- (void) valueY;
- (void) valueZ;
-}
+++ /dev/null
-
-/*
- * Mesa 3-D graphics library
- * Version: 3.3
- * Copyright (C) 1995-2000 Brian Paul
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-
-/*
- * This file is part of the polygon tesselation code contributed by
- * Bogdan Sikorski
- */
-
-
-#ifndef TESS_H
-#define TESS_H
-
-
-#include "gluP.h"
-
-#define EPSILON 1e-06 /* epsilon for double precision compares */
-
-typedef enum
-{
- OXY,
- OYZ,
- OXZ
-}
-projection_type;
-
-typedef struct callbacks_str
-{
- void (GLCALLBACK * begin) (GLenum mode);
- void (GLCALLBACK * edgeFlag) (GLboolean flag);
- void (GLCALLBACK * vertex) (GLvoid * v);
- void (GLCALLBACK * end) (void);
- void (GLCALLBACK * error) (GLenum err);
-}
-tess_callbacks;
-
-typedef struct vertex_str
-{
- void *data;
- GLdouble location[3];
- GLdouble x, y;
- GLboolean edge_flag;
- struct vertex_str *shadow_vertex;
- struct vertex_str *next, *previous;
-}
-tess_vertex;
-
-typedef struct contour_str
-{
- GLenum type;
- GLuint vertex_cnt;
- GLdouble area;
- GLenum orientation;
- struct vertex_str *vertices, *last_vertex;
- struct contour_str *next, *previous;
-}
-tess_contour;
-
-typedef struct polygon_str
-{
- GLuint vertex_cnt;
- GLdouble A, B, C, D;
- GLdouble area;
- GLenum orientation;
- struct vertex_str *vertices, *last_vertex;
-}
-tess_polygon;
-
-struct GLUtesselator
-{
- tess_contour *contours, *last_contour;
- GLuint contour_cnt;
- tess_callbacks callbacks;
- tess_polygon *current_polygon;
- GLenum error;
- GLdouble A, B, C, D;
- projection_type projection;
-};
-
-
-extern void tess_call_user_error(GLUtriangulatorObj *, GLenum);
-extern void tess_test_polygon(GLUtriangulatorObj *);
-extern void tess_find_contour_hierarchies(GLUtriangulatorObj *);
-extern void tess_handle_holes(GLUtriangulatorObj *);
-extern void tess_tesselate(GLUtriangulatorObj *);
-extern void tess_tesselate_with_edge_flag(GLUtriangulatorObj *);
-
-
-#endif
+++ /dev/null
-
-/*
- * Mesa 3-D graphics library
- * Version: 3.3
- * Copyright (C) 1995-2000 Brian Paul
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-
-/*
- * This file is part of the polygon tesselation code contributed by
- * Bogdan Sikorski
- */
-
-
-#ifdef PC_HEADER
-#include "all.h"
-#else
-#include <stdlib.h>
-#include <math.h>
-#include "tess.h"
-#endif
-
-
-
-static GLboolean edge_flag;
-
-static void emit_triangle(GLUtriangulatorObj *, tess_vertex *,
- tess_vertex *, tess_vertex *);
-
-static void emit_triangle_with_edge_flag(GLUtriangulatorObj *,
- tess_vertex *, GLboolean,
- tess_vertex *, GLboolean,
- tess_vertex *, GLboolean);
-
-static GLdouble
-twice_the_triangle_area(tess_vertex * va, tess_vertex * vb, tess_vertex * vc)
-{
- return (vb->x - va->x) * (vc->y - va->y) - (vb->y - va->y) * (vc->x -
- va->x);
-}
-
-static GLboolean
-left(GLdouble A, GLdouble B, GLdouble C, GLdouble x, GLdouble y)
-{
- if (A * x + B * y + C > -EPSILON)
- return GL_TRUE;
- else
- return GL_FALSE;
-}
-
-static GLboolean
-right(GLdouble A, GLdouble B, GLdouble C, GLdouble x, GLdouble y)
-{
- if (A * x + B * y + C < EPSILON)
- return GL_TRUE;
- else
- return GL_FALSE;
-}
-
-static GLint
-convex_ccw(tess_vertex * va,
- tess_vertex * vb, tess_vertex * vc, GLUtriangulatorObj * tobj)
-{
- GLdouble d;
-
- d = twice_the_triangle_area(va, vb, vc);
-
- if (d > EPSILON) {
- return 1;
- }
- else if (d < -EPSILON) {
- return 0;
- }
- else {
- return -1;
- }
-}
-
-static GLint
-convex_cw(tess_vertex * va,
- tess_vertex * vb, tess_vertex * vc, GLUtriangulatorObj * tobj)
-{
- GLdouble d;
-
- d = twice_the_triangle_area(va, vb, vc);
-
- if (d < -EPSILON) {
- return 1;
- }
- else if (d > EPSILON) {
- return 0;
- }
- else {
- return -1;
- }
-}
-
-static GLboolean
-diagonal_ccw(tess_vertex * va,
- tess_vertex * vb,
- GLUtriangulatorObj * tobj, tess_contour * contour)
-{
- tess_vertex *vc = va->next, *vertex, *shadow_vertex;
- struct
- {
- GLdouble A, B, C;
- }
- ac, cb, ba;
- GLdouble x, y;
-
- GLint res = convex_ccw(va, vc, vb, tobj);
- if (res == 0)
- return GL_FALSE;
- if (res == -1)
- return GL_TRUE;
-
- ba.A = vb->y - va->y;
- ba.B = va->x - vb->x;
- ba.C = -ba.A * va->x - ba.B * va->y;
- ac.A = va->y - vc->y;
- ac.B = vc->x - va->x;
- ac.C = -ac.A * vc->x - ac.B * vc->y;
- cb.A = vc->y - vb->y;
- cb.B = vb->x - vc->x;
- cb.C = -cb.A * vb->x - cb.B * vb->y;
- for (vertex = vb->next; vertex != va; vertex = vertex->next) {
- shadow_vertex = vertex->shadow_vertex;
- if (shadow_vertex != NULL &&
- (shadow_vertex == va || shadow_vertex == vb || shadow_vertex == vc))
- continue;
- x = vertex->x;
- y = vertex->y;
- if (left(ba.A, ba.B, ba.C, x, y) &&
- left(ac.A, ac.B, ac.C, x, y) && left(cb.A, cb.B, cb.C, x, y))
- return GL_FALSE;
- }
- return GL_TRUE;
-}
-
-static GLboolean
-diagonal_cw(tess_vertex * va,
- tess_vertex * vb,
- GLUtriangulatorObj * tobj, tess_contour * contour)
-{
- tess_vertex *vc = va->next, *vertex, *shadow_vertex;
- struct
- {
- GLdouble A, B, C;
- }
- ac, cb, ba;
- GLdouble x, y;
-
- GLint res = convex_cw(va, vc, vb, tobj);
- if (res == 0)
- return GL_FALSE;
- if (res == -1)
- return GL_TRUE;
-
- ba.A = vb->y - va->y;
- ba.B = va->x - vb->x;
- ba.C = -ba.A * va->x - ba.B * va->y;
- ac.A = va->y - vc->y;
- ac.B = vc->x - va->x;
- ac.C = -ac.A * vc->x - ac.B * vc->y;
- cb.A = vc->y - vb->y;
- cb.B = vb->x - vc->x;
- cb.C = -cb.A * vb->x - cb.B * vb->y;
- for (vertex = vb->next; vertex != va; vertex = vertex->next) {
- shadow_vertex = vertex->shadow_vertex;
- if (shadow_vertex != NULL &&
- (shadow_vertex == va || shadow_vertex == vb || shadow_vertex == vc))
- continue;
- x = vertex->x;
- y = vertex->y;
- if (right(ba.A, ba.B, ba.C, x, y) &&
- right(ac.A, ac.B, ac.C, x, y) && right(cb.A, cb.B, cb.C, x, y))
- return GL_FALSE;
- }
- return GL_TRUE;
-}
-
-static void
-clip_ear(GLUtriangulatorObj * tobj, tess_vertex * v, tess_contour * contour)
-{
- emit_triangle(tobj, v->previous, v, v->next);
- /* the first in the list */
- if (contour->vertices == v) {
- contour->vertices = v->next;
- contour->last_vertex->next = v->next;
- v->next->previous = contour->last_vertex;
- }
- else
- /* the last ? */
- if (contour->last_vertex == v) {
- contour->vertices->previous = v->previous;
- v->previous->next = v->next;
- contour->last_vertex = v->previous;
- }
- else {
- v->next->previous = v->previous;
- v->previous->next = v->next;
- }
- free(v);
- --(contour->vertex_cnt);
-}
-
-static void
-clip_ear_with_edge_flag(GLUtriangulatorObj * tobj,
- tess_vertex * v, tess_contour * contour)
-{
- emit_triangle_with_edge_flag(tobj, v->previous, v->previous->edge_flag,
- v, v->edge_flag, v->next, GL_FALSE);
- v->previous->edge_flag = GL_FALSE;
- /* the first in the list */
- if (contour->vertices == v) {
- contour->vertices = v->next;
- contour->last_vertex->next = v->next;
- v->next->previous = contour->last_vertex;
- }
- else
- /* the last ? */
- if (contour->last_vertex == v) {
- contour->vertices->previous = v->previous;
- v->previous->next = v->next;
- contour->last_vertex = v->previous;
- }
- else {
- v->next->previous = v->previous;
- v->previous->next = v->next;
- }
- free(v);
- --(contour->vertex_cnt);
-}
-
-static void
-triangulate_ccw(GLUtriangulatorObj * tobj, tess_contour * contour)
-{
- tess_vertex *vertex;
- GLuint vertex_cnt = contour->vertex_cnt;
-
- while (vertex_cnt > 3) {
- vertex = contour->vertices;
- while (diagonal_ccw(vertex, vertex->next->next, tobj, contour) ==
- GL_FALSE && tobj->error == GLU_NO_ERROR)
- vertex = vertex->next;
- if (tobj->error != GLU_NO_ERROR)
- return;
- clip_ear(tobj, vertex->next, contour);
- --vertex_cnt;
- }
-}
-
-static void
-triangulate_cw(GLUtriangulatorObj * tobj, tess_contour * contour)
-{
- tess_vertex *vertex;
- GLuint vertex_cnt = contour->vertex_cnt;
-
- while (vertex_cnt > 3) {
- vertex = contour->vertices;
- while (diagonal_cw(vertex, vertex->next->next, tobj, contour) ==
- GL_FALSE && tobj->error == GLU_NO_ERROR)
- vertex = vertex->next;
- if (tobj->error != GLU_NO_ERROR)
- return;
- clip_ear(tobj, vertex->next, contour);
- --vertex_cnt;
- }
-}
-
-static void
-triangulate_ccw_with_edge_flag(GLUtriangulatorObj * tobj,
- tess_contour * contour)
-{
- tess_vertex *vertex;
- GLuint vertex_cnt = contour->vertex_cnt;
-
- while (vertex_cnt > 3) {
- vertex = contour->vertices;
- while (diagonal_ccw(vertex, vertex->next->next, tobj, contour) ==
- GL_FALSE && tobj->error == GLU_NO_ERROR)
- vertex = vertex->next;
- if (tobj->error != GLU_NO_ERROR)
- return;
- clip_ear_with_edge_flag(tobj, vertex->next, contour);
- --vertex_cnt;
- }
-}
-
-static void
-triangulate_cw_with_edge_flag(GLUtriangulatorObj * tobj,
- tess_contour * contour)
-{
- tess_vertex *vertex;
- GLuint vertex_cnt = contour->vertex_cnt;
-
- while (vertex_cnt > 3) {
- vertex = contour->vertices;
- while (diagonal_cw(vertex, vertex->next->next, tobj, contour) ==
- GL_FALSE && tobj->error == GLU_NO_ERROR)
- vertex = vertex->next;
- if (tobj->error != GLU_NO_ERROR)
- return;
- clip_ear_with_edge_flag(tobj, vertex->next, contour);
- --vertex_cnt;
- }
-}
-
-void
-tess_tesselate(GLUtriangulatorObj * tobj)
-{
- tess_contour *contour;
-
- for (contour = tobj->contours; contour != NULL; contour = contour->next) {
- if (contour->orientation == GLU_CCW) {
- triangulate_ccw(tobj, contour);
- }
- else {
- triangulate_cw(tobj, contour);
- }
- if (tobj->error != GLU_NO_ERROR)
- return;
-
- /* emit the last triangle */
- emit_triangle(tobj, contour->vertices, contour->vertices->next,
- contour->vertices->next->next);
- }
-}
-
-void
-tess_tesselate_with_edge_flag(GLUtriangulatorObj * tobj)
-{
- tess_contour *contour;
-
- edge_flag = GL_TRUE;
- /* first callback with edgeFlag set to GL_TRUE */
- (tobj->callbacks.edgeFlag) (GL_TRUE);
-
- for (contour = tobj->contours; contour != NULL; contour = contour->next) {
- if (contour->orientation == GLU_CCW)
- triangulate_ccw_with_edge_flag(tobj, contour);
- else
- triangulate_cw_with_edge_flag(tobj, contour);
- if (tobj->error != GLU_NO_ERROR)
- return;
- /* emit the last triangle */
- emit_triangle_with_edge_flag(tobj, contour->vertices,
- contour->vertices->edge_flag,
- contour->vertices->next,
- contour->vertices->next->edge_flag,
- contour->vertices->next->next,
- contour->vertices->next->next->edge_flag);
- }
-}
-
-static void
-emit_triangle(GLUtriangulatorObj * tobj,
- tess_vertex * v1, tess_vertex * v2, tess_vertex * v3)
-{
- (tobj->callbacks.begin) (GL_TRIANGLES);
- (tobj->callbacks.vertex) (v1->data);
- (tobj->callbacks.vertex) (v2->data);
- (tobj->callbacks.vertex) (v3->data);
- (tobj->callbacks.end) ();
-}
-
-static void
-emit_triangle_with_edge_flag(GLUtriangulatorObj * tobj,
- tess_vertex * v1,
- GLboolean edge_flag1,
- tess_vertex * v2,
- GLboolean edge_flag2,
- tess_vertex * v3, GLboolean edge_flag3)
-{
- (tobj->callbacks.begin) (GL_TRIANGLES);
- if (edge_flag1 != edge_flag) {
- edge_flag = (edge_flag == GL_TRUE ? GL_FALSE : GL_TRUE);
- (tobj->callbacks.edgeFlag) (edge_flag);
- }
- (tobj->callbacks.vertex) (v1->data);
- if (edge_flag2 != edge_flag) {
- edge_flag = (edge_flag == GL_TRUE ? GL_FALSE : GL_TRUE);
- (tobj->callbacks.edgeFlag) (edge_flag);
- }
- (tobj->callbacks.vertex) (v2->data);
- if (edge_flag3 != edge_flag) {
- edge_flag = (edge_flag == GL_TRUE ? GL_FALSE : GL_TRUE);
- (tobj->callbacks.edgeFlag) (edge_flag);
- }
- (tobj->callbacks.vertex) (v3->data);
- (tobj->callbacks.end) ();
-}
projects / mesa.git / commitdiff