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

   1 /*
   2  * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
   3  * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice including the dates of first publication and
  13  * either this permission notice or a reference to
  14  * http://oss.sgi.com/projects/FreeB/
  15  * shall be included in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  20  * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  21  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
  22  * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  23  * SOFTWARE.
  24  *
  25  * Except as contained in this notice, the name of Silicon Graphics, Inc.
  26  * shall not be used in advertising or otherwise to promote the sale, use or
  27  * other dealings in this Software without prior written authorization from
  28  * Silicon Graphics, Inc.
  29  */
  30
  31 /*
  32  * glcurveval.h
  33  *
  34  */
  35
  36 #ifndef __gluglcurveval_h_
  37 #define __gluglcurveval_h_
  38
  39 #include "gluos.h"
  40 #include <GL/gl.h>
  41 #include <GL/glu.h>
  42 #include "basiccrveval.h"
  43
  44 class CurveMap;
  45
  46 /*for internal evaluator callback stuff*/
  47 #ifndef IN_MAX_BEZIER_ORDER
  48 #define IN_MAX_BEZIER_ORDER 40 /*XXX should be bigger than machine order*/
  49 #endif
  50
  51 #ifndef IN_MAX_DIMENSION
  52 #define IN_MAX_DIMENSION 4
  53 #endif
  54
  55 typedef struct curveEvalMachine{
  56   REAL uprime; //cached previously evaluated uprime
  57   int k; //the dimension
  58   REAL u1;
  59   REAL u2;
  60   int ustride;
  61   int uorder;
  62   REAL ctlpoints[IN_MAX_BEZIER_ORDER*IN_MAX_DIMENSION];
  63   REAL ucoeff[IN_MAX_BEZIER_ORDER];//cache the polynomial values
  64 } curveEvalMachine;
  65
  66 class OpenGLCurveEvaluator : public BasicCurveEvaluator  {
  67 public:
  68                         OpenGLCurveEvaluator(void);
  69                         virtual ~OpenGLCurveEvaluator(void);
  70     void                range1f(long, REAL *, REAL *);
  71     void                domain1f(REAL, REAL);
  72     void                addMap(CurveMap *);
  73
  74     void                enable(long);
  75     void                disable(long);
  76     void                bgnmap1f(long);
  77     void                map1f(long, REAL, REAL, long, long, REAL *);
  78     void                mapgrid1f(long, REAL, REAL);
  79     void                mapmesh1f(long, long, long);
  80     void                evalpoint1i(long);
  81     void                evalcoord1f(long, REAL);
  82     void                endmap1f(void);
  83
  84     void                bgnline(void);
  85     void                endline(void);
  86
  87     void                put_vertices_call_back(int flag)
  88       {
  89         output_triangles = flag;
  90       }
  91 #ifdef _WIN32
  92     void               putCallBack(GLenum which, void (GLAPIENTRY *fn)() );
  93 #else
  94     void               putCallBack(GLenum which, _GLUfuncptr fn );
  95 #endif
  96     void               set_callback_userData(void *data)
  97       {
  98         userData = data;
  99       }
 100
 101 /*------------------begin for curveEvalMachine------------*/
 102 curveEvalMachine em_vertex;
 103 curveEvalMachine em_normal;
 104 curveEvalMachine em_color;
 105 curveEvalMachine em_texcoord;
 106 int vertex_flag; //whether there is a vertex map or not
 107 int normal_flag; //whether there is a normal map or not
 108 int color_flag; //whether there is a color map or not
 109 int texcoord_flag; //whether there is a texture map or not
 110
 111 REAL global_grid_u0;
 112 REAL global_grid_u1;
 113 int global_grid_nu;
 114
 115 void inMap1f(int which, //0: vert, 1: norm, 2: color, 3: tex
 116              int dimension,
 117              REAL ulower,
 118              REAL uupper,
 119              int ustride,
 120              int uorder,
 121              REAL *ctlpoints);
 122
 123 void inPreEvaluate(int order, REAL vprime, REAL *coeff);
 124 void inDoDomain1(curveEvalMachine *em, REAL u, REAL *retPoint);
 125 void inDoEvalCoord1(REAL u);
 126 void inMapMesh1f(int umin, int umax);
 127
 128 void     (GLAPIENTRY *beginCallBackN) (GLenum type);
 129 void     (GLAPIENTRY *endCallBackN)   (void);
 130 void     (GLAPIENTRY *vertexCallBackN) (const GLfloat *vert);
 131 void     (GLAPIENTRY *normalCallBackN) (const GLfloat *normal);
 132 void     (GLAPIENTRY *colorCallBackN) (const GLfloat *color);
 133 void     (GLAPIENTRY *texcoordCallBackN) (const GLfloat *texcoord);
 134
 135 void     (GLAPIENTRY *beginCallBackData) (GLenum type, void* data);
 136 void     (GLAPIENTRY *endCallBackData)   (void* data);
 137 void     (GLAPIENTRY *vertexCallBackData) (const GLfloat *vert, void* data);
 138 void     (GLAPIENTRY *normalCallBackData) (const GLfloat *normal, void* data);
 139 void     (GLAPIENTRY *colorCallBackData) (const GLfloat *color, void* data);
 140 void     (GLAPIENTRY *texcoordCallBackData) (const GLfloat *texcoord, void* data);
 141
 142 void* userData; //the opaque pointer for Data callback functions
 143 void  beginCallBack(GLenum type, void* data);
 144 void endCallBack(void* data);
 145 void vertexCallBack(const GLfloat *vert, void *data);
 146 void normalCallBack(const GLfloat *normal, void* data);
 147 void colorCallBack(const  GLfloat *color, void* data);
 148 void texcoordCallBack(const GLfloat *texcoord, void* data);
 149
 150
 151 /*------------------end   for curveEvalMachine------------*/
 152
 153 private:
 154     int output_triangles; //true 1; false 0
 155 };
 156
 157 #endif /* __gluglcurveval_h_ */