| /* |
| * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008) |
| * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved. |
| * |
| * 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 including the dates of first publication and |
| * either this permission notice or a reference to |
| * http://oss.sgi.com/projects/FreeB/ |
| * 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 |
| * SILICON GRAPHICS, INC. 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. |
| * |
| * Except as contained in this notice, the name of Silicon Graphics, Inc. |
| * shall not be used in advertising or otherwise to promote the sale, use or |
| * other dealings in this Software without prior written authorization from |
| * Silicon Graphics, Inc. |
| */ |
| |
| /* |
| * glcurveval.h |
| * |
| */ |
| |
| #ifndef __gluglcurveval_h_ |
| #define __gluglcurveval_h_ |
| |
| #include "gluos.h" |
| #include <GL/gl.h> |
| #include <GL/glu.h> |
| #include "basiccrveval.h" |
| |
| class CurveMap; |
| |
| /*for internal evaluator callback stuff*/ |
| #ifndef IN_MAX_BEZIER_ORDER |
| #define IN_MAX_BEZIER_ORDER 40 /*XXX should be bigger than machine order*/ |
| #endif |
| |
| #ifndef IN_MAX_DIMENSION |
| #define IN_MAX_DIMENSION 4 |
| #endif |
| |
| typedef struct curveEvalMachine{ |
| REAL uprime; //cached previously evaluated uprime |
| int k; //the dimension |
| REAL u1; |
| REAL u2; |
| int ustride; |
| int uorder; |
| REAL ctlpoints[IN_MAX_BEZIER_ORDER*IN_MAX_DIMENSION]; |
| REAL ucoeff[IN_MAX_BEZIER_ORDER];//cache the polynomial values |
| } curveEvalMachine; |
| |
| class OpenGLCurveEvaluator : public BasicCurveEvaluator { |
| public: |
| OpenGLCurveEvaluator(void); |
| virtual ~OpenGLCurveEvaluator(void); |
| void range1f(long, REAL *, REAL *); |
| void domain1f(REAL, REAL); |
| void addMap(CurveMap *); |
| |
| void enable(long); |
| void disable(long); |
| void bgnmap1f(long); |
| void map1f(long, REAL, REAL, long, long, REAL *); |
| void mapgrid1f(long, REAL, REAL); |
| void mapmesh1f(long, long, long); |
| void evalpoint1i(long); |
| void evalcoord1f(long, REAL); |
| void endmap1f(void); |
| |
| void bgnline(void); |
| void endline(void); |
| |
| void put_vertices_call_back(int flag) |
| { |
| output_triangles = flag; |
| } |
| #ifdef _WIN32 |
| void putCallBack(GLenum which, void (GLAPIENTRY *fn)() ); |
| #else |
| void putCallBack(GLenum which, _GLUfuncptr fn ); |
| #endif |
| void set_callback_userData(void *data) |
| { |
| userData = data; |
| } |
| |
| /*------------------begin for curveEvalMachine------------*/ |
| curveEvalMachine em_vertex; |
| curveEvalMachine em_normal; |
| curveEvalMachine em_color; |
| curveEvalMachine em_texcoord; |
| int vertex_flag; //whether there is a vertex map or not |
| int normal_flag; //whether there is a normal map or not |
| int color_flag; //whether there is a color map or not |
| int texcoord_flag; //whether there is a texture map or not |
| |
| REAL global_grid_u0; |
| REAL global_grid_u1; |
| int global_grid_nu; |
| |
| void inMap1f(int which, //0: vert, 1: norm, 2: color, 3: tex |
| int dimension, |
| REAL ulower, |
| REAL uupper, |
| int ustride, |
| int uorder, |
| REAL *ctlpoints); |
| |
| void inPreEvaluate(int order, REAL vprime, REAL *coeff); |
| void inDoDomain1(curveEvalMachine *em, REAL u, REAL *retPoint); |
| void inDoEvalCoord1(REAL u); |
| void inMapMesh1f(int umin, int umax); |
| |
| void (GLAPIENTRY *beginCallBackN) (GLenum type); |
| void (GLAPIENTRY *endCallBackN) (void); |
| void (GLAPIENTRY *vertexCallBackN) (const GLfloat *vert); |
| void (GLAPIENTRY *normalCallBackN) (const GLfloat *normal); |
| void (GLAPIENTRY *colorCallBackN) (const GLfloat *color); |
| void (GLAPIENTRY *texcoordCallBackN) (const GLfloat *texcoord); |
| |
| void (GLAPIENTRY *beginCallBackData) (GLenum type, void* data); |
| void (GLAPIENTRY *endCallBackData) (void* data); |
| void (GLAPIENTRY *vertexCallBackData) (const GLfloat *vert, void* data); |
| void (GLAPIENTRY *normalCallBackData) (const GLfloat *normal, void* data); |
| void (GLAPIENTRY *colorCallBackData) (const GLfloat *color, void* data); |
| void (GLAPIENTRY *texcoordCallBackData) (const GLfloat *texcoord, void* data); |
| |
| void* userData; //the opaque pointer for Data callback functions |
| void beginCallBack(GLenum type, void* data); |
| void endCallBack(void* data); |
| void vertexCallBack(const GLfloat *vert, void *data); |
| void normalCallBack(const GLfloat *normal, void* data); |
| void colorCallBack(const GLfloat *color, void* data); |
| void texcoordCallBack(const GLfloat *texcoord, void* data); |
| |
| |
| /*------------------end for curveEvalMachine------------*/ |
| |
| private: |
| int output_triangles; //true 1; false 0 |
| }; |
| |
| #endif /* __gluglcurveval_h_ */ |