src/glu/sgi/libnurbs/interface/glcurveval.h

   1 /*
   2 ** License Applicability. Except to the extent portions of this file are
   3 ** made subject to an alternative license as permitted in the SGI Free
   4 ** Software License B, Version 1.1 (the "License"), the contents of this
   5 ** file are subject only to the provisions of the License. You may not use
   6 ** this file except in compliance with the License. You may obtain a copy
   7 ** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
   8 ** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
   9 **
  10 ** http://oss.sgi.com/projects/FreeB
  11 **
  12 ** Note that, as provided in the License, the Software is distributed on an
  13 ** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  14 ** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  15 ** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  16 ** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
  17 **
  18 ** Original Code. The Original Code is: OpenGL Sample Implementation,
  19 ** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
  20 ** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  21 ** Copyright in any portions created by third parties is as indicated
  22 ** elsewhere herein. All Rights Reserved.
  23 **
  24 ** Additional Notice Provisions: The application programming interfaces
  25 ** established by SGI in conjunction with the Original Code are The
  26 ** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
  27 ** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
  28 ** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
  29 ** Window System(R) (Version 1.3), released October 19, 1998. This software
  30 ** was created using the OpenGL(R) version 1.2.1 Sample Implementation
  31 ** published by SGI, but has not been independently verified as being
  32 ** compliant with the OpenGL(R) version 1.2.1 Specification.
  33 */
  34
  35 /*
  36  * glcurveval.h
  37  *
  38  * $Date: 2001/03/17 00:25:40 $ $Revision: 1.1 $
  39  * $Header: /home/krh/git/sync/mesa-cvs-repo/Mesa/src/glu/sgi/libnurbs/interface/glcurveval.h,v 1.1 2001/03/17 00:25:40 brianp Exp $
  40  */
  41
  42 #ifndef __gluglcurveval_h_
  43 #define __gluglcurveval_h_
  44
  45 #include "gluos.h"
  46 #include <GL/gl.h>
  47 #include "basiccrveval.h"
  48
  49 class CurveMap;
  50
  51 /*for internal evaluator callback stuff*/
  52 #ifndef IN_MAX_BEZIER_ORDER
  53 #define IN_MAX_BEZIER_ORDER 40 /*XXX should be bigger than machine order*/
  54 #endif
  55
  56 #ifndef IN_MAX_DIMENSION
  57 #define IN_MAX_DIMENSION 4
  58 #endif
  59
  60 typedef struct curveEvalMachine{
  61   REAL uprime; //cached previously evaluated uprime
  62   int k; //the dimension
  63   REAL u1;
  64   REAL u2;
  65   int ustride;
  66   int uorder;
  67   REAL ctlpoints[IN_MAX_BEZIER_ORDER*IN_MAX_DIMENSION];
  68   REAL ucoeff[IN_MAX_BEZIER_ORDER];//cache the polynomial values
  69 } curveEvalMachine;
  70
  71 class OpenGLCurveEvaluator : public BasicCurveEvaluator  {
  72 public:
  73                         OpenGLCurveEvaluator(void);
  74                         ~OpenGLCurveEvaluator(void);
  75     void                range1f(long, REAL *, REAL *);
  76     void                domain1f(REAL, REAL);
  77     void                addMap(CurveMap *);
  78
  79     void                enable(long);
  80     void                disable(long);
  81     void                bgnmap1f(long);
  82     void                map1f(long, REAL, REAL, long, long, REAL *);
  83     void                mapgrid1f(long, REAL, REAL);
  84     void                mapmesh1f(long, long, long);
  85     void                evalpoint1i(long);
  86     void                evalcoord1f(long, REAL);
  87     void                endmap1f(void);
  88
  89     void                bgnline(void);
  90     void                endline(void);
  91
  92     void                put_vertices_call_back(int flag)
  93       {
  94         output_triangles = flag;
  95       }
  96     void               putCallBack(GLenum which, GLvoid (GLAPIENTRY *fn)(...));
  97     void               set_callback_userData(void *data)
  98       {
  99         userData = data;
 100       }
 101
 102 /*------------------begin for curveEvalMachine------------*/
 103 curveEvalMachine em_vertex;
 104 curveEvalMachine em_normal;
 105 curveEvalMachine em_color;
 106 curveEvalMachine em_texcoord;
 107 int vertex_flag; //whether there is a vertex map or not
 108 int normal_flag; //whether there is a normal map or not
 109 int color_flag; //whether there is a color map or not
 110 int texcoord_flag; //whether there is a texture map or not
 111
 112 int global_grid_u0;
 113 int global_grid_u1;
 114 int global_grid_nu;
 115
 116 void inMap1f(int which, //0: vert, 1: norm, 2: color, 3: tex
 117              int dimension,
 118              REAL ulower,
 119              REAL uupper,
 120              int ustride,
 121              int uorder,
 122              REAL *ctlpoints);
 123
 124 void inPreEvaluate(int order, REAL vprime, REAL *coeff);
 125 void inDoDomain1(curveEvalMachine *em, REAL u, REAL *retPoint);
 126 void inDoEvalCoord1(REAL u);
 127 void inMapMesh1f(int umin, int umax);
 128
 129 void     (GLAPIENTRY *beginCallBackN) (GLenum type);
 130 void     (GLAPIENTRY *endCallBackN)   (void);
 131 void     (GLAPIENTRY *vertexCallBackN) (const GLfloat *vert);
 132 void     (GLAPIENTRY *normalCallBackN) (const GLfloat *normal);
 133 void     (GLAPIENTRY *colorCallBackN) (const GLfloat *color);
 134 void     (GLAPIENTRY *texcoordCallBackN) (const GLfloat *texcoord);
 135
 136 void     (GLAPIENTRY *beginCallBackData) (GLenum type, void* data);
 137 void     (GLAPIENTRY *endCallBackData)   (void* data);
 138 void     (GLAPIENTRY *vertexCallBackData) (const GLfloat *vert, void* data);
 139 void     (GLAPIENTRY *normalCallBackData) (const GLfloat *normal, void* data);
 140 void     (GLAPIENTRY *colorCallBackData) (const GLfloat *color, void* data);
 141 void     (GLAPIENTRY *texcoordCallBackData) (const GLfloat *texcoord, void* data);
 142
 143 void* userData; //the opaque pointer for Data callback functions
 144 void  beginCallBack(GLenum type, void* data);
 145 void endCallBack(void* data);
 146 void vertexCallBack(const GLfloat *vert, void *data);
 147 void normalCallBack(const GLfloat *normal, void* data);
 148 void colorCallBack(const  GLfloat *color, void* data);
 149 void texcoordCallBack(const GLfloat *texcoord, void* data);
 150
 151
 152 /*------------------end   for curveEvalMachine------------*/
 153
 154 private:
 155     int output_triangles; //true 1; false 0
 156 };
 157
 158 #endif /* __gluglcurveval_h_ */