FreeWRL / FreeX3D 4.3.0
glsurfeval.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 * glsurfeval.h
33 *
34 */
35
36#ifndef __gluglsurfeval_h_
37#define __gluglsurfeval_h_
38
39#include "basicsurfeval.h"
40#include "bezierPatchMesh.h" //in case output triangles
41#include <libnurbs2.h>
42//#include <GL/gl.h>
43//#include <GL/glu.h>
44
45class SurfaceMap;
47class StoredVertex;
48
49#define TYPECOORD 1
50#define TYPEPOINT 2
51
52/* Cache up to 3 vertices from tmeshes */
53#define VERTEX_CACHE_SIZE 3
54
55/*for internal evaluator callback stuff*/
56#ifndef IN_MAX_BEZIER_ORDER
57#define IN_MAX_BEZIER_ORDER 40 /*XXX should be bigger than machine order*/
58#endif
59
60#ifndef IN_MAX_DIMENSION
61#define IN_MAX_DIMENSION 4
62#endif
63
64typedef struct surfEvalMachine{
65 REAL uprime;//cached previusly evaluated uprime.
66 REAL vprime;
67 int k; /*the dimension*/
68 REAL u1;
69 REAL u2;
70 int ustride;
71 int uorder;
72 REAL v1;
73 REAL v2;
74 int vstride;
75 int vorder;
76 REAL ctlPoints[IN_MAX_BEZIER_ORDER*IN_MAX_BEZIER_ORDER*IN_MAX_DIMENSION];
77 REAL ucoeff[IN_MAX_BEZIER_ORDER]; /*cache the polynomial values*/
78 REAL vcoeff[IN_MAX_BEZIER_ORDER];
79 REAL ucoeffDeriv[IN_MAX_BEZIER_ORDER]; /*cache the polynomial derivatives*/
80 REAL vcoeffDeriv[IN_MAX_BEZIER_ORDER];
82
83
84
86public:
87 StoredVertex() { type = 0; }
88 ~StoredVertex(void) {}
89 void saveEvalCoord(REAL x, REAL y)
90 {coord[0] = x; coord[1] = y; type = TYPECOORD; }
91 void saveEvalPoint(long x, long y)
92 {point[0] = x; point[1] = y; type = TYPEPOINT; }
93 void invoke(OpenGLSurfaceEvaluator *eval);
94
95private:
96 int type;
97 REAL coord[2];
98 long point[2];
99};
100
102public:
104 virtual ~OpenGLSurfaceEvaluator( void );
105 void polymode( long style );
106 void range2f( long, REAL *, REAL * );
107 void domain2f( REAL, REAL, REAL, REAL );
108 void addMap( SurfaceMap * ) { }
109
110 void enable( long );
111 void disable( long );
112 void bgnmap2f( long );
113 void map2f( long, REAL, REAL, long, long,
114 REAL, REAL, long, long, REAL * );
115 void mapgrid2f( long, REAL, REAL, long, REAL, REAL );
116 void mapmesh2f( long, long, long, long, long );
117 void evalcoord2f( long, REAL, REAL );
118 void evalpoint2i( long, long );
119 void endmap2f( void );
120
121 void bgnline( void );
122 void endline( void );
123 void bgnclosedline( void );
124 void endclosedline( void );
125 void bgntmesh( void );
126 void swaptmesh( void );
127 void endtmesh( void );
128 void bgnqstrip( void );
129 void endqstrip( void );
130
131 void bgntfan( void );
132 void endtfan( void );
133 void evalUStrip(int n_upper, REAL v_upper, REAL* upper_val,
134 int n_lower, REAL v_lower, REAL* lower_val);
135 void evalVStrip(int n_left, REAL u_left, REAL* left_val,
136 int n_right, REAL u_right, REAL* right_val);
137
138 void coord2f( REAL, REAL );
139 void point2i( long, long );
140
141 void newtmeshvert( REAL, REAL );
142 void newtmeshvert( long, long );
143
144#ifdef _WIN32
145 void putCallBack(GLenum which, void (GLAPIENTRY *fn)() );
146#else
147 void putCallBack(GLenum which, _GLUfuncptr fn );
148#endif
149
150 int get_vertices_call_back()
151 {
152 return output_triangles;
153 }
154 void put_vertices_call_back(int flag)
155 {
156 output_triangles = flag;
157 }
158
159 void put_callback_auto_normal(int flag)
160 {
161 callback_auto_normal = flag;
162 }
163
164 int get_callback_auto_normal()
165 {
166 return callback_auto_normal;
167 }
168
169 void set_callback_userData(void* data)
170 {
171 userData = data;
172 }
173
174 /**************begin for LOD_eval_list***********/
175 void LOD_eval_list(int level);
176
177
178
179
180private:
181 StoredVertex *vertexCache[VERTEX_CACHE_SIZE];
182 int tmeshing;
183 int which;
184 int vcount;
185
186 GLint gl_polygon_mode[2];/*to save and restore so that
187 *no side effect
188 */
189 bezierPatchMesh *global_bpm; //for output triangles
190 int output_triangles; //true 1 or false 0
191
192
193
194 void (GLAPIENTRY *beginCallBackN) (GLenum type);
195 void (GLAPIENTRY *endCallBackN) (void);
196 void (GLAPIENTRY *vertexCallBackN) (const GLfloat *vert);
197 void (GLAPIENTRY *normalCallBackN) (const GLfloat *normal);
198 void (GLAPIENTRY *colorCallBackN) (const GLfloat *color);
199 void (GLAPIENTRY *texcoordCallBackN) (const GLfloat *texcoord);
200
201 void (GLAPIENTRY *beginCallBackData) (GLenum type, void* data);
202 void (GLAPIENTRY *endCallBackData) (void* data);
203 void (GLAPIENTRY *vertexCallBackData) (const GLfloat *vert, void* data);
204 void (GLAPIENTRY *normalCallBackData) (const GLfloat *normal, void* data);
205 void (GLAPIENTRY *colorCallBackData) (const GLfloat *color, void* data);
206 void (GLAPIENTRY *texcoordCallBackData) (const GLfloat *texcoord, void* data);
207
208 void beginCallBack (GLenum type, void* data);
209 void endCallBack (void* data);
210 void vertexCallBack (const GLfloat *vert, void* data);
211 void normalCallBack (const GLfloat *normal, void* data);
212 void colorCallBack (const GLfloat *color, void* data);
213 void texcoordCallBack (const GLfloat *texcoord, void* data);
214
215
216 void* userData; //the opaque pointer for Data callback functions.
217
218 /*LOD evaluation*/
219 void LOD_triangle(REAL A[2], REAL B[2], REAL C[2],
220 int level);
221 void LOD_eval(int num_vert, REAL* verts, int type, int level);
222
223 int LOD_eval_level; //set by LOD_eval_list()
224
225 /*************begin for internal evaluators*****************/
226
227 /*the following global variables are only defined in this file.
228 *They are used to cache the precomputed Bezier polynomial values.
229 *These calues may be used consecutively in which case we don't have
230 *recompute these values again.
231 */
232 int global_uorder; /*store the uorder in the previous evaluation*/
233 int global_vorder; /*store the vorder in the previous evaluation*/
234 REAL global_uprime;
235 REAL global_vprime;
236 REAL global_vprime_BV;
237 REAL global_uprime_BU;
238 int global_uorder_BV; /*store the uorder in the previous evaluation*/
239 int global_vorder_BV; /*store the vorder in the previous evaluation*/
240 int global_uorder_BU; /*store the uorder in the previous evaluation*/
241 int global_vorder_BU; /*store the vorder in the previous evaluation*/
242
243 REAL global_ucoeff[IN_MAX_BEZIER_ORDER]; /*cache the polynomial values*/
244 REAL global_vcoeff[IN_MAX_BEZIER_ORDER];
245 REAL global_ucoeffDeriv[IN_MAX_BEZIER_ORDER]; /*cache the polynomial derivatives*/
246 REAL global_vcoeffDeriv[IN_MAX_BEZIER_ORDER];
247
248 REAL global_BV[IN_MAX_BEZIER_ORDER][IN_MAX_DIMENSION];
249 REAL global_PBV[IN_MAX_BEZIER_ORDER][IN_MAX_DIMENSION];
250 REAL global_BU[IN_MAX_BEZIER_ORDER][IN_MAX_DIMENSION];
251 REAL global_PBU[IN_MAX_BEZIER_ORDER][IN_MAX_DIMENSION];
252 REAL* global_baseData;
253
254 int global_ev_k; /*the dimension*/
255 REAL global_ev_u1;
256 REAL global_ev_u2;
257 int global_ev_ustride;
258 int global_ev_uorder;
259 REAL global_ev_v1;
260 REAL global_ev_v2;
261 int global_ev_vstride;
262 int global_ev_vorder;
263 REAL global_ev_ctlPoints[IN_MAX_BEZIER_ORDER*IN_MAX_BEZIER_ORDER*IN_MAX_DIMENSION];
264
265 REAL global_grid_u0;
266 REAL global_grid_u1;
267 int global_grid_nu;
268 REAL global_grid_v0;
269 REAL global_grid_v1;
270 int global_grid_nv;
271
272/*functions*/
273 void inDoDomain2WithDerivs(int k, REAL u, REAL v,
274 REAL u1, REAL u2, int uorder,
275 REAL v1, REAL v2, int vorder,
276 REAL *baseData,
277 REAL *retPoint, REAL *retdu, REAL *retdv);
278 void inPreEvaluate(int order, REAL vprime, REAL *coeff);
279 void inPreEvaluateWithDeriv(int order, REAL vprime, REAL *coeff, REAL *coeffDeriv);
280 void inComputeFirstPartials(REAL *p, REAL *pu, REAL *pv);
281 void inComputeNormal2(REAL *pu, REAL *pv, REAL *n);
282 void inDoEvalCoord2(REAL u, REAL v,
283 REAL *retPoint, REAL *retNormal);
284 void inDoEvalCoord2NOGE(REAL u, REAL v,
285 REAL *retPoint, REAL *retNormal);
286 void inMap2f(int k,
287 REAL ulower,
288 REAL uupper,
289 int ustride,
290 int uorder,
291 REAL vlower,
292 REAL vupper,
293 int vstride,
294 int vorder,
295 REAL *ctlPoints);
296
297 void inMapGrid2f(int nu, REAL u0, REAL u1,
298 int nv, REAL v0, REAL v1);
299
300 void inEvalMesh2(int lowU, int lowV, int highU, int highV);
301 void inEvalPoint2(int i, int j);
302 void inEvalCoord2f(REAL u, REAL v);
303
304void inEvalULine(int n_points, REAL v, REAL* u_vals,
305 int stride, REAL ret_points[][3], REAL ret_normals[][3]);
306
307void inEvalVLine(int n_points, REAL u, REAL* v_vals,
308 int stride, REAL ret_points[][3], REAL ret_normals[][3]);
309
310void inEvalUStrip(int n_upper, REAL v_upper, REAL* upper_val,
311 int n_lower, REAL v_lower, REAL* lower_val
312 );
313void inEvalVStrip(int n_left, REAL u_left, REAL* left_val, int n_right, REAL u_right, REAL* right_val);
314
315void inPreEvaluateBV(int k, int uorder, int vorder, REAL vprime, REAL *baseData);
316void inPreEvaluateBU(int k, int uorder, int vorder, REAL uprime, REAL *baseData);
317void inPreEvaluateBV_intfac(REAL v )
318 {
319 inPreEvaluateBV(global_ev_k, global_ev_uorder, global_ev_vorder, (v-global_ev_v1)/(global_ev_v2-global_ev_v1), global_ev_ctlPoints);
320 }
321
322void inPreEvaluateBU_intfac(REAL u)
323 {
324 inPreEvaluateBU(global_ev_k, global_ev_uorder, global_ev_vorder, (u-global_ev_u1)/(global_ev_u2-global_ev_u1), global_ev_ctlPoints);
325 }
326
327void inDoDomain2WithDerivsBV(int k, REAL u, REAL v,
328 REAL u1, REAL u2, int uorder,
329 REAL v1, REAL v2, int vorder,
330 REAL *baseData,
331 REAL *retPoint, REAL* retdu, REAL *retdv);
332
333void inDoDomain2WithDerivsBU(int k, REAL u, REAL v,
334 REAL u1, REAL u2, int uorder,
335 REAL v1, REAL v2, int vorder,
336 REAL *baseData,
337 REAL *retPoint, REAL* retdu, REAL *retdv);
338
339
340void inDoEvalCoord2NOGE_BV(REAL u, REAL v,
341 REAL *retPoint, REAL *retNormal);
342
343void inDoEvalCoord2NOGE_BU(REAL u, REAL v,
344 REAL *retPoint, REAL *retNormal);
345
346void inBPMEval(bezierPatchMesh* bpm);
347void inBPMListEval(bezierPatchMesh* list);
348
349/*-------------begin for surfEvalMachine -------------*/
350surfEvalMachine em_vertex;
351surfEvalMachine em_normal;
352surfEvalMachine em_color;
353surfEvalMachine em_texcoord;
354
355int auto_normal_flag; //whether to output normla or not in callback
356 //determined by GL_AUTO_NORMAL and callback_auto_normal
357int callback_auto_normal; //GLU_CALLBACK_AUTO_NORMAL_EXT
358int vertex_flag;
359int normal_flag;
360int color_flag;
361int texcoord_flag;
362
363void inMap2fEM(int which, //0:vert,1:norm,2:color,3:tex
364 int dimension,
365 REAL ulower,
366 REAL uupper,
367 int ustride,
368 int uorder,
369 REAL vlower,
370 REAL vupper,
371 int vstride,
372 int vorder,
373 REAL *ctlPoints);
374
375void inDoDomain2WithDerivsEM(surfEvalMachine *em, REAL u, REAL v,
376 REAL *retPoint, REAL *retdu, REAL *retdv);
377void inDoDomain2EM(surfEvalMachine *em, REAL u, REAL v,
378 REAL *retPoint);
379 void inDoEvalCoord2EM(REAL u, REAL v);
380
381void inBPMEvalEM(bezierPatchMesh* bpm);
382void inBPMListEvalEM(bezierPatchMesh* list);
383
384/*-------------end for surfEvalMachine -------------*/
385
386
387 /*************end for internal evaluators*****************/
388
389};
390
391inline void StoredVertex::invoke(OpenGLSurfaceEvaluator *eval)
392{
393 switch(type) {
394 case TYPECOORD:
395 eval->coord2f(coord[0], coord[1]);
396 break;
397 case TYPEPOINT:
398 eval->point2i(point[0], point[1]);
399 break;
400 default:
401 break;
402 }
403}
404
405#endif /* __gluglsurfeval_h_ */