| /* |
| * 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; } |
| ~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_ */ |