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IABSD.fr/xenocara/lib/libGLU/src/libnurbs/interface/glsurfeval.h
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- lib/libGLU/src/libnurbs/interface/glsurfeval.h
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/* * 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. */ /* * glsurfeval.h * */ #ifndef __gluglsurfeval_h_ #define __gluglsurfeval_h_ #include "basicsurfeval.h" #include "bezierPatchMesh.h" //in case output triangles #include <GL/gl.h> #include <GL/glu.h> class SurfaceMap; class OpenGLSurfaceEvaluator; class StoredVertex; #define TYPECOORD 1 #define TYPEPOINT 2 /* Cache up to 3 vertices from tmeshes */ #define VERTEX_CACHE_SIZE 3 /*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 surfEvalMachine{ REAL uprime;//cached previusly evaluated uprime. REAL vprime; int k; /*the dimension*/ REAL u1; REAL u2; int ustride; int uorder; REAL v1; REAL v2; int vstride; int vorder; REAL ctlPoints[IN_MAX_BEZIER_ORDER*IN_MAX_BEZIER_ORDER*IN_MAX_DIMENSION]; REAL ucoeff[IN_MAX_BEZIER_ORDER]; /*cache the polynomial values*/ REAL vcoeff[IN_MAX_BEZIER_ORDER]; REAL ucoeffDeriv[IN_MAX_BEZIER_ORDER]; /*cache the polynomial derivatives*/ REAL vcoeffDeriv[IN_MAX_BEZIER_ORDER]; } surfEvalMachine; class StoredVertex { public: StoredVertex() { type = 0; coord[0] = 0; coord[1] = 0; point[0] = 0; point[1] = 0; } ~StoredVertex(void) {} void saveEvalCoord(REAL x, REAL y) {coord[0] = x; coord[1] = y; type = TYPECOORD; } void saveEvalPoint(long x, long y) {point[0] = x; point[1] = y; type = TYPEPOINT; } void invoke(OpenGLSurfaceEvaluator *eval); private: int type; REAL coord[2]; long point[2]; }; class OpenGLSurfaceEvaluator : public BasicSurfaceEvaluator { public: OpenGLSurfaceEvaluator(); virtual ~OpenGLSurfaceEvaluator( void ); void polymode( long style ); void range2f( long, REAL *, REAL * ); void domain2f( REAL, REAL, REAL, REAL ); void addMap( SurfaceMap * ) { } void enable( long ); void disable( long ); void bgnmap2f( long ); void map2f( long, REAL, REAL, long, long, REAL, REAL, long, long, REAL * ); void mapgrid2f( long, REAL, REAL, long, REAL, REAL ); void mapmesh2f( long, long, long, long, long ); void evalcoord2f( long, REAL, REAL ); void evalpoint2i( long, long ); void endmap2f( void ); void bgnline( void ); void endline( void ); void bgnclosedline( void ); void endclosedline( void ); void bgntmesh( void ); void swaptmesh( void ); void endtmesh( void ); void bgnqstrip( void ); void endqstrip( void ); void bgntfan( void ); void endtfan( void ); void evalUStrip(int n_upper, REAL v_upper, REAL* upper_val, int n_lower, REAL v_lower, REAL* lower_val); void evalVStrip(int n_left, REAL u_left, REAL* left_val, int n_right, REAL u_right, REAL* right_val); void coord2f( REAL, REAL ); void point2i( long, long ); void newtmeshvert( REAL, REAL ); void newtmeshvert( long, long ); #ifdef _WIN32 void putCallBack(GLenum which, void (GLAPIENTRY *fn)() ); #else void putCallBack(GLenum which, _GLUfuncptr fn ); #endif int get_vertices_call_back() { return output_triangles; } void put_vertices_call_back(int flag) { output_triangles = flag; } void put_callback_auto_normal(int flag) { callback_auto_normal = flag; } int get_callback_auto_normal() { return callback_auto_normal; } void set_callback_userData(void* data) { userData = data; } /**************begin for LOD_eval_list***********/ void LOD_eval_list(int level); private: StoredVertex *vertexCache[VERTEX_CACHE_SIZE]; int tmeshing; int which; int vcount; GLint gl_polygon_mode[2];/*to save and restore so that *no side effect */ bezierPatchMesh *global_bpm; //for output triangles int output_triangles; //true 1 or false 0 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 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); void* userData; //the opaque pointer for Data callback functions. /*LOD evaluation*/ void LOD_triangle(REAL A[2], REAL B[2], REAL C[2], int level); void LOD_eval(int num_vert, REAL* verts, int type, int level); int LOD_eval_level; //set by LOD_eval_list() /*************begin for internal evaluators*****************/ /*the following global variables are only defined in this file. *They are used to cache the precomputed Bezier polynomial values. *These calues may be used consecutively in which case we don't have *recompute these values again. */ int global_uorder; /*store the uorder in the previous evaluation*/ int global_vorder; /*store the vorder in the previous evaluation*/ REAL global_uprime; REAL global_vprime; REAL global_vprime_BV; REAL global_uprime_BU; int global_uorder_BV; /*store the uorder in the previous evaluation*/ int global_vorder_BV; /*store the vorder in the previous evaluation*/ int global_uorder_BU; /*store the uorder in the previous evaluation*/ int global_vorder_BU; /*store the vorder in the previous evaluation*/ REAL global_ucoeff[IN_MAX_BEZIER_ORDER]; /*cache the polynomial values*/ REAL global_vcoeff[IN_MAX_BEZIER_ORDER]; REAL global_ucoeffDeriv[IN_MAX_BEZIER_ORDER]; /*cache the polynomial derivatives*/ REAL global_vcoeffDeriv[IN_MAX_BEZIER_ORDER]; REAL global_BV[IN_MAX_BEZIER_ORDER][IN_MAX_DIMENSION]; REAL global_PBV[IN_MAX_BEZIER_ORDER][IN_MAX_DIMENSION]; REAL global_BU[IN_MAX_BEZIER_ORDER][IN_MAX_DIMENSION]; REAL global_PBU[IN_MAX_BEZIER_ORDER][IN_MAX_DIMENSION]; REAL* global_baseData; int global_ev_k; /*the dimension*/ REAL global_ev_u1; REAL global_ev_u2; int global_ev_ustride; int global_ev_uorder; REAL global_ev_v1; REAL global_ev_v2; int global_ev_vstride; int global_ev_vorder; REAL global_ev_ctlPoints[IN_MAX_BEZIER_ORDER*IN_MAX_BEZIER_ORDER*IN_MAX_DIMENSION]; REAL global_grid_u0; REAL global_grid_u1; int global_grid_nu; REAL global_grid_v0; REAL global_grid_v1; int global_grid_nv; /*functions*/ void inDoDomain2WithDerivs(int k, REAL u, REAL v, REAL u1, REAL u2, int uorder, REAL v1, REAL v2, int vorder, REAL *baseData, REAL *retPoint, REAL *retdu, REAL *retdv); void inPreEvaluate(int order, REAL vprime, REAL *coeff); void inPreEvaluateWithDeriv(int order, REAL vprime, REAL *coeff, REAL *coeffDeriv); void inComputeFirstPartials(REAL *p, REAL *pu, REAL *pv); void inComputeNormal2(REAL *pu, REAL *pv, REAL *n); void inDoEvalCoord2(REAL u, REAL v, REAL *retPoint, REAL *retNormal); void inDoEvalCoord2NOGE(REAL u, REAL v, REAL *retPoint, REAL *retNormal); void inMap2f(int k, REAL ulower, REAL uupper, int ustride, int uorder, REAL vlower, REAL vupper, int vstride, int vorder, REAL *ctlPoints); void inMapGrid2f(int nu, REAL u0, REAL u1, int nv, REAL v0, REAL v1); void inEvalMesh2(int lowU, int lowV, int highU, int highV); void inEvalPoint2(int i, int j); void inEvalCoord2f(REAL u, REAL v); void inEvalULine(int n_points, REAL v, REAL* u_vals, int stride, REAL ret_points[][3], REAL ret_normals[][3]); void inEvalVLine(int n_points, REAL u, REAL* v_vals, int stride, REAL ret_points[][3], REAL ret_normals[][3]); void inEvalUStrip(int n_upper, REAL v_upper, REAL* upper_val, int n_lower, REAL v_lower, REAL* lower_val ); void inEvalVStrip(int n_left, REAL u_left, REAL* left_val, int n_right, REAL u_right, REAL* right_val); void inPreEvaluateBV(int k, int uorder, int vorder, REAL vprime, REAL *baseData); void inPreEvaluateBU(int k, int uorder, int vorder, REAL uprime, REAL *baseData); void inPreEvaluateBV_intfac(REAL v ) { inPreEvaluateBV(global_ev_k, global_ev_uorder, global_ev_vorder, (v-global_ev_v1)/(global_ev_v2-global_ev_v1), global_ev_ctlPoints); } void inPreEvaluateBU_intfac(REAL u) { inPreEvaluateBU(global_ev_k, global_ev_uorder, global_ev_vorder, (u-global_ev_u1)/(global_ev_u2-global_ev_u1), global_ev_ctlPoints); } void inDoDomain2WithDerivsBV(int k, REAL u, REAL v, REAL u1, REAL u2, int uorder, REAL v1, REAL v2, int vorder, REAL *baseData, REAL *retPoint, REAL* retdu, REAL *retdv); void inDoDomain2WithDerivsBU(int k, REAL u, REAL v, REAL u1, REAL u2, int uorder, REAL v1, REAL v2, int vorder, REAL *baseData, REAL *retPoint, REAL* retdu, REAL *retdv); void inDoEvalCoord2NOGE_BV(REAL u, REAL v, REAL *retPoint, REAL *retNormal); void inDoEvalCoord2NOGE_BU(REAL u, REAL v, REAL *retPoint, REAL *retNormal); void inBPMEval(bezierPatchMesh* bpm); void inBPMListEval(bezierPatchMesh* list); /*-------------begin for surfEvalMachine -------------*/ surfEvalMachine em_vertex; surfEvalMachine em_normal; surfEvalMachine em_color; surfEvalMachine em_texcoord; int auto_normal_flag; //whether to output normla or not in callback //determined by GL_AUTO_NORMAL and callback_auto_normal int callback_auto_normal; //GLU_CALLBACK_AUTO_NORMAL_EXT int vertex_flag; int normal_flag; int color_flag; int texcoord_flag; void inMap2fEM(int which, //0:vert,1:norm,2:color,3:tex int dimension, REAL ulower, REAL uupper, int ustride, int uorder, REAL vlower, REAL vupper, int vstride, int vorder, REAL *ctlPoints); void inDoDomain2WithDerivsEM(surfEvalMachine *em, REAL u, REAL v, REAL *retPoint, REAL *retdu, REAL *retdv); void inDoDomain2EM(surfEvalMachine *em, REAL u, REAL v, REAL *retPoint); void inDoEvalCoord2EM(REAL u, REAL v); void inBPMEvalEM(bezierPatchMesh* bpm); void inBPMListEvalEM(bezierPatchMesh* list); /*-------------end for surfEvalMachine -------------*/ /*************end for internal evaluators*****************/ }; inline void StoredVertex::invoke(OpenGLSurfaceEvaluator *eval) { switch(type) { case TYPECOORD: eval->coord2f(coord[0], coord[1]); break; case TYPEPOINT: eval->point2i(point[0], point[1]); break; default: break; } } #endif /* __gluglsurfeval_h_ */