-/* $Id: quadric.c,v 1.3 1999/11/11 09:55:39 joukj Exp $ */
/*
* Mesa 3-D graphics library
- * Version: 3.1
- * Copyright (C) 1995-1999 Brian Paul
+ * 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
*/
-/*
- * $Log: quadric.c,v $
- * Revision 1.3 1999/11/11 09:55:39 joukj
- *
- * tess_macro.h included
- *
- * Revision 1.2 1999/11/11 03:21:43 kendallb
- *
- * . Updated GL/gl.h with GLCALLACKP and GLAPIENTRYP macros for compatibility
- * with the IBM VisualAge C++ compiler. Eventually some more code will be
- * needed in the headers to enable the reversal of (__stdcall*) to (*__stdcall)
- * for the IBM compilers, however we currently build using our own header files
- * that already handle this.
- *
- * . Changed instances of (GLCALLBACK*) to GLCALLBACKP for compatibility
- * with the IBM VisualAge C++ compiler in src-glu.
- *
- * . Misc cleanups for warnings generated with Watcom C++ in src-glu. Compiles
- * with 0 warnings now.
- *
- * . tess_hash.c: line 244 - Why is this function stubbed out? I removed the
- * code with a #if 0 to avoid a compiler warning, but it looks dangerous.
- *
- * Revision 1.1.1.1 1999/08/19 00:55:42 jtg
- * Imported sources
- *
- * Revision 1.19 1999/02/27 13:55:31 brianp
- * fixed BeOS-related GLU typedef problems
- *
- * Revision 1.18 1999/01/03 03:23:15 brianp
- * now using GLAPIENTRY and GLCALLBACK keywords (Ted Jump)
- *
- * Revision 1.17 1999/01/03 03:19:15 brianp
- * rewrote some of gluCylinder
- *
- * Revision 1.16 1998/06/01 01:08:36 brianp
- * small update for Next/OpenStep from Alexander Mai
- *
- * Revision 1.15 1998/03/15 18:28:54 brianp
- * reimplemented gluDisk() point and line mode
- *
- * Revision 1.14 1998/03/15 18:14:17 brianp
- * fixed a compiler cast warning
- *
- * Revision 1.13 1998/02/07 14:28:34 brianp
- * another change to gluQuadricCallback(), this time for StormC compiler
- *
- * Revision 1.12 1998/02/05 00:43:19 brianp
- * Yes, still another change to gluQuadricCallback()!
- *
- * Revision 1.11 1998/02/04 00:27:43 brianp
- * yet another change to gluQuadricCallback()!
- *
- * Revision 1.10 1998/02/04 00:23:23 brianp
- * fixed CALLBACK problem in gluQuadricCallback() (Stephane Rehel)
- *
- * Revision 1.9 1998/02/04 00:20:09 brianp
- * added missing (int) in ErrorFunc cast
- *
- * Revision 1.8 1998/01/16 03:37:51 brianp
- * fixed another assignment warning in gluQuadricCallback()
- *
- * Revision 1.7 1998/01/16 03:35:26 brianp
- * fixed Windows compilation warnings (Theodore Jump)
- *
- * Revision 1.6 1997/10/29 02:02:20 brianp
- * various MS Windows compiler changes (David Bucciarelli, v20 3dfx driver)
- *
- * Revision 1.5 1997/09/17 01:51:48 brianp
- * changed glu*Callback() functions to match prototype in glu.h
- *
- * Revision 1.4 1997/07/24 01:28:44 brianp
- * changed precompiled header symbol from PCH to PC_HEADER
- *
- * Revision 1.3 1997/05/28 02:29:38 brianp
- * added support for precompiled headers (PCH), inserted APIENTRY keyword
- *
- * Revision 1.2 1997/03/12 02:15:38 brianp
- * fixed problem in gluPartialDisk() reported by Kenneth H. Carpenter
- *
- * Revision 1.1 1996/09/27 01:19:39 brianp
- * Initial revision
- *
- */
-
-
/* TODO:
* texture coordinate support
* flip normals according to orientation
#include <stdio.h>
#include <stdlib.h>
#include "gluP.h"
-#include "tess_macros.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:
*/
-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 (GLCALLBACKP ErrorFunc)(GLenum err); /* Error handler callback function */
+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 )
+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 );
+ (*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);
+ fprintf(stderr, "GLUError: %s: %s\n", (char *) gluErrorString(error),
+ msg);
}
}
-GLUquadricObj * GLAPIENTRY gluNewQuadric( void )
+GLUquadricObj *GLAPIENTRY
+gluNewQuadric(void)
{
GLUquadricObj *q;
- q = (GLUquadricObj *) malloc( sizeof(struct GLUquadric) );
+ q = (GLUquadricObj *) malloc(sizeof(struct GLUquadric));
if (q) {
q->DrawStyle = GLU_FILL;
q->Orientation = GLU_OUTSIDE;
-void GLAPIENTRY gluDeleteQuadric( GLUquadricObj *state )
+void GLAPIENTRY
+gluDeleteQuadric(GLUquadricObj * state)
{
if (state) {
- free( (void *) 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 )
+void GLAPIENTRY
+gluQuadricDrawStyle(GLUquadricObj * quadObject, GLenum drawStyle)
{
- if (quadObject && (drawStyle==GLU_FILL || drawStyle==GLU_LINE
- || drawStyle==GLU_SILHOUETTE || drawStyle==GLU_POINT)) {
+ 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" );
+ quadric_error(quadObject, GLU_INVALID_ENUM, "qluQuadricDrawStyle");
}
}
/*
* Set the orientation to GLU_INSIDE or GLU_OUTSIDE.
*/
-void GLAPIENTRY gluQuadricOrientation( GLUquadricObj *quadObject,
- GLenum orientation )
+void GLAPIENTRY
+gluQuadricOrientation(GLUquadricObj * quadObject, GLenum orientation)
{
- if (quadObject && (orientation==GLU_INSIDE || orientation==GLU_OUTSIDE)) {
+ if (quadObject
+ && (orientation == GLU_INSIDE || orientation == GLU_OUTSIDE)) {
quadObject->Orientation = orientation;
}
else {
- quadric_error( quadObject, GLU_INVALID_ENUM, "qluQuadricOrientation" );
+ quadric_error(quadObject, GLU_INVALID_ENUM, "qluQuadricOrientation");
}
}
/*
* Set the error handler callback function.
*/
-void GLAPIENTRY gluQuadricCallback( GLUquadricObj *qobj,
- GLenum which, void (GLCALLBACKP fn)() )
+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) {
+ if (qobj && which == GLU_ERROR) {
#ifdef __CYGWIN32__
- qobj->ErrorFunc = (void(*)(int))fn;
+ qobj->ErrorFunc = (void (GLCALLBACKPCAST) (GLenum)) fn;
#elif defined(OPENSTEP)
- qobj->ErrorFunc = (void(*)(GLenum))fn;
+ qobj->ErrorFunc = (void (*)(GLenum)) fn;
#elif defined(_WIN32)
- qobj->ErrorFunc = (void(GLCALLBACKP)(int))fn;
+ qobj->ErrorFunc = (void (GLCALLBACK *) (int)) fn;
#elif defined(__STORM__)
- qobj->ErrorFunc = (void(GLCALLBACKP)(GLenum))fn;
+ qobj->ErrorFunc = (void (GLCALLBACK *) (GLenum)) fn;
#elif defined(__BEOS__)
- qobj->ErrorFunc = (void(*)(GLenum))fn;
+ qobj->ErrorFunc = (void (*)(GLenum)) fn;
#else
- qobj->ErrorFunc = (void(GLCALLBACKP)())fn;
+ qobj->ErrorFunc = (void (GLCALLBACK *) ()) fn;
#endif
}
}
-void GLAPIENTRY gluQuadricNormals( GLUquadricObj *quadObject, GLenum normals )
+void GLAPIENTRY
+gluQuadricNormals(GLUquadricObj * quadObject, GLenum normals)
{
if (quadObject
- && (normals==GLU_NONE || normals==GLU_FLAT || normals==GLU_SMOOTH)) {
+ && (normals == GLU_NONE || normals == GLU_FLAT
+ || normals == GLU_SMOOTH)) {
quadObject->Normals = normals;
}
}
-void GLAPIENTRY gluQuadricTexture( GLUquadricObj *quadObject,
- GLboolean textureCoords )
+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 )
+static void
+normal3f(GLfloat x, GLfloat y, GLfloat z)
{
GLdouble mag;
- mag = sqrt( x*x + y*y + z*z );
- if (mag>0.00001F) {
+ mag = sqrt(x * x + y * y + z * z);
+ if (mag > 0.00001F) {
x /= mag;
y /= mag;
z /= mag;
}
- glNormal3f( x, y, z );
+ glNormal3f(x, y, z);
}
-void GLAPIENTRY gluCylinder( GLUquadricObj *qobj,
- GLdouble baseRadius, GLdouble topRadius,
- GLdouble height, GLint slices, GLint stacks )
+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) {
+ if (qobj->Orientation == GLU_INSIDE) {
nsign = -1.0;
}
else {
nsign = 1.0;
}
- da = 2.0*M_PI / slices;
- dr = (topRadius-baseRadius) / stacks;
+ da = 2.0 * M_PI / slices;
+ dr = (topRadius - baseRadius) / stacks;
dz = height / stacks;
- nz = (baseRadius-topRadius) / height; /* Z component of normal vectors */
+ 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 );
+ 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 );
+ 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) {
+ else if (qobj->DrawStyle == GLU_LINE || qobj->DrawStyle == GLU_SILHOUETTE) {
/* Draw rings */
- if (qobj->DrawStyle==GLU_LINE) {
+ 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 );
+ 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;
}
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 );
+ 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 );
+ 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 );
+ 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) {
+ 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);
- y = cos(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 */
+ 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 )
+void GLAPIENTRY
+gluSphere(GLUquadricObj * qobj, GLdouble radius, GLint slices, GLint stacks)
{
GLfloat rho, drho, theta, dtheta;
GLfloat x, y, z;
GLboolean normals;
GLfloat nsign;
- if (qobj->Normals==GLU_NONE) {
+ if (qobj->Normals == GLU_NONE) {
normals = GL_FALSE;
}
else {
normals = GL_TRUE;
}
- if (qobj->Orientation==GLU_INSIDE) {
+ if (qobj->Orientation == GLU_INSIDE) {
nsign = -1.0;
}
else {
/* 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 );
- TXTR_COORD(0.5,1.0);
- 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 );
+ 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();
}
- glEnd();
- }
ds = 1.0 / slices;
dt = 1.0 / stacks;
- t = 1.0; /* because loop now runs from 0 */
+ t = 1.0; /* because loop now runs from 0 */
if (qobj->TextureFlag) {
- imin = 0;
- imax = stacks;
+ imin = 0;
+ imax = stacks;
}
else {
- imin = 1;
- imax = stacks-1;
+ imin = 1;
+ imax = stacks - 1;
}
/* draw intermediate stacks as quad strips */
- for (i=imin;i<imax;i++) {
+ 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;
+ 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 );
+ 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 );
- TXTR_COORD(0.5,0.0);
- 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 );
- TXTR_COORD(s,t);
- s -= ds;
- glVertex3f( x*radius, y*radius, z*radius );
+ 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();
}
- glEnd();
- }
}
- else if (qobj->DrawStyle==GLU_LINE || qobj->DrawStyle==GLU_SILHOUETTE) {
+ 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 */
+ 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++) {
+ 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 );
+ 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++) {
+ for (j = 0; j < slices; j++) {
theta = j * dtheta;
- glBegin( GL_LINE_STRIP );
- for (i=0;i<=stacks;i++) {
+ 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 );
+ if (normals)
+ glNormal3f(x * nsign, y * nsign, z * nsign);
+ glVertex3f(x * radius, y * radius, z * radius);
}
glEnd();
}
}
- else if (qobj->DrawStyle==GLU_POINT) {
+ 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 );
+ 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++) {
+ for (i = 1; i < stacks - 1; i++) {
rho = i * drho;
- for (j=0;j<slices;j++) {
+ 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 );
+ 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 )
+void GLAPIENTRY
+gluDisk(GLUquadricObj * qobj,
+ GLdouble innerRadius, GLdouble outerRadius, GLint slices, GLint loops)
{
GLfloat da, dr;
#if 0
#endif
/* Normal vectors */
- if (qobj->Normals!=GLU_NONE) {
- if (qobj->Orientation==GLU_OUTSIDE) {
- glNormal3f( 0.0, 0.0, +1.0 );
+ 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 );
+ glNormal3f(0.0, 0.0, -1.0);
}
}
- da = 2.0*M_PI / slices;
- dr = (outerRadius-innerRadius) / (GLfloat) loops;
+ da = 2.0 * M_PI / slices;
+ dr = (outerRadius - innerRadius) / (GLfloat) loops;
switch (qobj->DrawStyle) {
- case GLU_FILL:
+ 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++) {
+ /* 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 );
+ 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 );
+ 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;
+ break;
}
- case GLU_LINE:
+ case GLU_LINE:
{
- GLint l, s;
+ 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) );
- }
+ 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;
+ 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 );
+ 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:
+ case GLU_POINT:
{
- GLint s;
- glBegin( GL_POINTS );
- for (s=0; s<slices; s++) {
- GLfloat a = s * da;
+ 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 );
+ GLint l;
+ for (l = 0; l <= loops; l++) {
+ GLfloat r = innerRadius * l * dr;
+ glVertex2f(r * x, r * y);
}
}
glEnd();
break;
}
- case GLU_SILHOUETTE:
+ case GLU_SILHOUETTE:
{
- if (innerRadius!=0.0) {
- GLfloat a;
- glBegin( GL_LINE_LOOP );
- for (a=0.0; a<2.0*M_PI; a+=da) {
+ 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 );
+ 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();
}
- {
- 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();
+ default:
+ abort();
}
}
-void GLAPIENTRY gluPartialDisk( GLUquadricObj *qobj, GLdouble innerRadius,
- GLdouble outerRadius, GLint slices, GLint loops,
- GLdouble startAngle, GLdouble sweepAngle )
+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 );
+ 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 );
+ glNormal3f(0.0, 0.0, -1.0);
}
}
- if (qobj->DrawStyle==GLU_POINT) {
+ 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 );
+ 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++) {
+ for (loop = 0; loop < loops; loop++) {
angle = DEG_TO_RAD(startAngle);
- for (slice=0; slice<slices; slice++) {
- glVertex2d( radius * sin(angle), radius * cos(angle) );
+ 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) {
+ else if (qobj->DrawStyle == GLU_LINE) {
GLint loop, slice;
GLdouble radius, delta_radius;
GLdouble angle, delta_angle;
delta_angle = DEG_TO_RAD(sweepAngle / slices);
/* draw rings */
radius = innerRadius;
- for (loop=0; loop<loops; loop++) {
+ 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) );
+ glBegin(GL_LINE_STRIP);
+ for (slice = 0; slice <= slices; slice++) {
+ glVertex2d(radius * sin(angle), radius * cos(angle));
angle += delta_angle;
}
glEnd();
}
/* draw spokes */
angle = DEG_TO_RAD(startAngle);
- for (slice=0; slice<slices; slice++) {
+ 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) );
+ 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) {
+ 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 );
+ glBegin(GL_LINE_STRIP);
angle = DEG_TO_RAD(startAngle);
- for (slice=0; slice<=slices; slice++) {
- glVertex2d( outerRadius * sin(angle), outerRadius * cos(angle) );
+ 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 );
+ 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) );
+ for (slice = 0; slice < slices; slice++) {
+ glVertex2d(innerRadius * sin(angle), innerRadius * cos(angle));
angle += delta_angle;
}
glEnd();
}
/* draw spokes */
- if (sweepAngle<360.0) {
+ 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) );
+ 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) {
+ 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 );
+ 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) );
+ 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) );
+ glVertex2d(radius * sin(angle), radius * cos(angle));
+ glVertex2d((radius + delta_radius) * sin(angle),
+ (radius + delta_radius) * cos(angle));
}
angle += delta_angle;
}
}
}
}
-
-
-
projects / mesa.git / blobdiff