FreeWRL / FreeX3D 4.3.0
nurbstess.cc
1/*
2** License Applicability. Except to the extent portions of this file are
3** made subject to an alternative license as permitted in the SGI Free
4** Software License B, Version 1.1 (the "License"), the contents of this
5** file are subject only to the provisions of the License. You may not use
6** this file except in compliance with the License. You may obtain a copy
7** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
8** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
9**
10** http://oss.sgi.com/projects/FreeB
11**
12** Note that, as provided in the License, the Software is distributed on an
13** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
14** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
15** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
16** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
17**
18** Original Code. The Original Code is: OpenGL Sample Implementation,
19** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
20** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
21** Copyright in any portions created by third parties is as indicated
22** elsewhere herein. All Rights Reserved.
23**
24** Additional Notice Provisions: The application programming interfaces
25** established by SGI in conjunction with the Original Code are The
26** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
27** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
28** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
29** Window System(R) (Version 1.3), released October 19, 1998. This software
30** was created using the OpenGL(R) version 1.2.1 Sample Implementation
31** published by SGI, but has not been independently verified as being
32** compliant with the OpenGL(R) version 1.2.1 Specification.
33*/
34
35/*
36 * nurbstess.c++
37 *
38 */
39
40#include "glimports.h"
41#include "myassert.h"
42#include "mysetjmp.h"
43#include "mystdio.h"
44#include "nurbsconsts.h"
45#include "nurbstess.h"
46#include "bufpool.h"
47#include "quilt.h"
48#include "knotvector.h"
49#include "mapdesc.h"
50#include "maplist.h"
51
52void
53NurbsTessellator::set_domain_distance_u_rate(REAL u_rate)
54{
55 subdivider.set_domain_distance_u_rate(u_rate);
56}
57
58void
59NurbsTessellator::set_domain_distance_v_rate(REAL v_rate)
60{
61 subdivider.set_domain_distance_v_rate(v_rate);
62}
63
64void
65NurbsTessellator::set_is_domain_distance_sampling(int flag)
66{
67 subdivider.set_is_domain_distance_sampling(flag);
68}
69
70void
71NurbsTessellator::resetObjects( void )
72{
73 subdivider.clear();
74}
75
76void
77NurbsTessellator::makeobj( int )
78{
79#ifndef NDEBUG
80 _glu_dprintf( "makeobj\n" );
81#endif
82}
83
84void
85NurbsTessellator::closeobj( void )
86{
87#ifndef NDEBUG
88 _glu_dprintf( "closeobj\n" );
89#endif
90}
91
92void
93NurbsTessellator::bgnrender( void )
94{
95#ifndef NDEBUG
96 _glu_dprintf( "bgnrender\n" );
97#endif
98}
99
100void
101NurbsTessellator::endrender( void )
102{
103#ifndef NDEBUG
104 _glu_dprintf( "endrender\n" );
105#endif
106}
107
108/*-----------------------------------------------------------------------------
109 * do_freebgnsurface - free o_surface structure
110 *
111 * Client: do_freeall(), bgnsurface()
112 *-----------------------------------------------------------------------------
113 */
114void
115NurbsTessellator::do_freebgnsurface( O_surface *o_surface )
116{
117 o_surface->deleteMe( o_surfacePool );
118}
119
120
121/*-----------------------------------------------------------------------------
122 * do_bgnsurface - begin the display of a surface
123 *
124 * Client: bgnsurface()
125 *-----------------------------------------------------------------------------
126 */
127void
128NurbsTessellator::do_bgnsurface( O_surface *o_surface )
129{
130 if( inSurface ) {
131 do_nurbserror( 27 );
132 endsurface();
133 }
134 inSurface = 1;
135
136 if( ! playBack ) bgnrender();
137
138 isTrimModified = 0;
139 isSurfaceModified = 0;
140 isDataValid = 1;
141 numTrims = 0;
142 currentSurface = o_surface;
143 nextTrim = &( currentSurface->o_trim );
144 nextNurbssurface = &( currentSurface->o_nurbssurface );
145}
146
147/*-----------------------------------------------------------------------------
148 * do_bgncurve - begin the display of a curve
149 *
150 * Client: bgncurve()
151 *-----------------------------------------------------------------------------
152 */
153void
154NurbsTessellator::do_bgncurve( O_curve *o_curve )
155{
156 if ( inCurve ) {
157 do_nurbserror( 6 );
158 endcurve();
159 }
160
161 inCurve = 1;
162 currentCurve = o_curve;
163 currentCurve->curvetype = ct_none;
164
165 if( inTrim ) {
166 if( *nextCurve != o_curve ) {
167 isCurveModified = 1;
168 *nextCurve = o_curve;
169 }
170 } else {
171 if( ! playBack ) bgnrender();
172 isDataValid = 1;
173 }
174 nextCurve = &(o_curve->next);
175 nextPwlcurve = &(o_curve->curve.o_pwlcurve);
176 nextNurbscurve = &(o_curve->curve.o_nurbscurve);
177}
178
179/*-----------------------------------------------------------------------------
180 * do_endcurve -
181 *
182 * Client: endcurve()
183 *-----------------------------------------------------------------------------
184 */
185
186void
187NurbsTessellator::do_endcurve( void )
188{
189 if( ! inCurve ) {
190 do_nurbserror( 7 );
191 return;
192 }
193 inCurve = 0;
194
195 *nextCurve = 0;
196 if (currentCurve->curvetype == ct_nurbscurve)
197 *nextNurbscurve = 0;
198 else
199 *nextPwlcurve = 0;
200
201 if ( ! inTrim ) {
202 if( ! isDataValid ) {
203 do_freecurveall( currentCurve );
204 return;
205 }
206
207 int errval;
208 errval = ::mysetjmp( jumpbuffer );
209 if( errval == 0 ) {
210 if( currentCurve->curvetype == ct_nurbscurve ) {
211 subdivider.beginQuilts();
212 for( O_nurbscurve *n = currentCurve->curve.o_nurbscurve; n != 0; n = n->next )
213 subdivider.addQuilt( n->bezier_curves );
214 subdivider.endQuilts();
215 subdivider.drawCurves();
216 if( ! playBack ) endrender();
217 } else {
218 /* XXX */
219 if( ! playBack ) endrender();
220 /*do_draw_pwlcurve( currentCurve->curve.o_pwlcurve ) */;
221 do_nurbserror( 9 );
222 }
223 } else {
224 if( ! playBack ) endrender();
225 do_nurbserror( errval );
226 }
227 do_freecurveall( currentCurve );
228 resetObjects();
229 }
230}
231
232/*-----------------------------------------------------------------------------
233 * do_endsurface - mark end of surface, display surface, free immediate data
234 *
235 * Client:
236 *-----------------------------------------------------------------------------
237 */
238void
239NurbsTessellator::do_endsurface( void )
240{
241 if( inTrim ) {
242 do_nurbserror( 12 );
243 endtrim();
244 }
245
246 if( ! inSurface ) {
247 do_nurbserror( 13 );
248 return;
249 }
250 inSurface = 0;
251
252 *nextNurbssurface = 0;
253
254 if( ! isDataValid ) {
255 do_freeall( );
256 return;
257 }
258
259 if( *nextTrim != 0 ) {
260 isTrimModified = 1;
261 *nextTrim = 0;
262 }
263
264 int errval;
265
266 errval = ::mysetjmp( jumpbuffer );
267 if( errval == 0 ) {
268 if( numTrims > 0 ) {
269
270 subdivider.beginTrims();
271 for( O_trim *trim = currentSurface->o_trim; trim; trim = trim->next ) {
272 subdivider.beginLoop();
273 for( O_curve *curve = trim->o_curve; curve; curve = curve->next ) {
274 curve->used = 0;
275 assert( curve->curvetype != ct_none );
276 if (curve->curvetype == ct_pwlcurve) {
277 O_pwlcurve *c = curve->curve.o_pwlcurve;
278 subdivider.addArc( c->npts, c->pts, curve->nuid );
279 } else {
280 Quilt *quilt = curve->curve.o_nurbscurve->bezier_curves;
281 Quiltspec *qspec = quilt->qspec;
282 REAL *cpts = quilt->cpts + qspec->offset;
283 REAL *cptsend = cpts + (qspec->width * qspec->order * qspec->stride);
284 for( ; cpts != cptsend; cpts += qspec->order*qspec->stride )
285 subdivider.addArc( cpts, quilt, curve->nuid );
286 }
287 }
288 subdivider.endLoop();
289 }
290 subdivider.endTrims();
291 }
292
293 subdivider.beginQuilts();
294 for( O_nurbssurface *n = currentSurface->o_nurbssurface; n; n = n->next )
295 subdivider.addQuilt( n->bezier_patches );
296 subdivider.endQuilts();
297 subdivider.drawSurfaces( currentSurface->nuid );
298 if( ! playBack ) endrender();
299 } else {
300 if( ! playBack ) endrender();
301 do_nurbserror( errval );
302 }
303
304 do_freeall( );
305 resetObjects();
306}
307
308/*-----------------------------------------------------------------------------
309 * do_freeall - free all data allocated in immediate mode
310 *
311 * Client:
312 *-----------------------------------------------------------------------------
313 */
314void
315NurbsTessellator::do_freeall( void )
316{
317 for( O_trim *o_trim = currentSurface->o_trim; o_trim; ) {
318 O_trim *next_o_trim = o_trim->next;
319 for( O_curve *curve = o_trim->o_curve; curve; ) {
320 O_curve *next_o_curve = curve->next;
321 do_freecurveall( curve );
322 curve = next_o_curve;
323 }
324 if( o_trim->save == 0 ) do_freebgntrim( o_trim );
325 o_trim = next_o_trim;
326 }
327
328 O_nurbssurface *nurbss, *next_nurbss;
329 for( nurbss= currentSurface->o_nurbssurface; nurbss; nurbss = next_nurbss) {
330 next_nurbss = nurbss->next;
331 if( nurbss->save == 0 )
332 do_freenurbssurface( nurbss );
333 else
334 nurbss->used = 0;
335 }
336
337 if( currentSurface->save == 0 ) do_freebgnsurface( currentSurface );
338}
339
340void
341NurbsTessellator::do_freecurveall( O_curve *curve )
342{
343 assert( curve->curvetype != ct_none );
344
345 if( curve->curvetype == ct_nurbscurve ) {
346 O_nurbscurve *ncurve, *next_ncurve;
347 for( ncurve=curve->curve.o_nurbscurve; ncurve; ncurve=next_ncurve ) {
348 next_ncurve = ncurve->next;
349 if( ncurve->save == 0 )
350 do_freenurbscurve( ncurve );
351 else
352 ncurve->used = 0;
353 }
354 } else {
355 O_pwlcurve *pcurve, *next_pcurve;
356 for( pcurve=curve->curve.o_pwlcurve; pcurve; pcurve=next_pcurve ) {
357 next_pcurve = pcurve->next;
358 if( pcurve->save == 0 )
359 do_freepwlcurve( pcurve );
360 else
361 pcurve->used = 0;
362 }
363 }
364 if( curve->save == 0 )
365 do_freebgncurve( curve );
366}
367
368
369/*-----------------------------------------------------------------------------
370 * do_freebgntrim - free the space allocated for a trim loop
371 *
372 * Client:
373 *-----------------------------------------------------------------------------
374 */
375void
376NurbsTessellator::do_freebgntrim( O_trim *o_trim )
377{
378 o_trim->deleteMe( o_trimPool );
379}
380
381
382/*-----------------------------------------------------------------------------
383 * do_bgntrim - link in a trim loop to the current trimmed surface description
384 *
385 * Client: bgntrim()
386 *-----------------------------------------------------------------------------
387 */
388void
389NurbsTessellator::do_bgntrim( O_trim *o_trim )
390{
391
392 if( ! inSurface ) {
393 do_nurbserror( 15 );
394 bgnsurface( 0 );
395 inSurface = 2;
396 }
397
398 if( inTrim ) {
399 do_nurbserror( 16 );
400 endtrim();
401 }
402 inTrim = 1;
403
404 if( *nextTrim != o_trim ) {
405 isTrimModified = 1;
406 *nextTrim = o_trim;
407 }
408
409 currentTrim = o_trim;
410 nextTrim = &(o_trim->next);
411 nextCurve = &(o_trim->o_curve);
412}
413
414
415/*-----------------------------------------------------------------------------
416 * do_endtrim - mark the end of the current trim loop
417 *
418 * Client: endtrim()
419 *-----------------------------------------------------------------------------
420 */
421void
422NurbsTessellator::do_endtrim( void )
423{
424 if( ! inTrim ) {
425 do_nurbserror( 17 );
426 return;
427 }
428 inTrim = 0;
429
430 if( currentTrim->o_curve == 0 ) {
431 do_nurbserror( 18 );
432 isDataValid = 0;
433 }
434
435 numTrims++;
436
437 if( *nextCurve != 0 ) {
438 isTrimModified = 1;
439 *nextCurve = 0;
440 }
441}
442
443/*-----------------------------------------------------------------------------
444 * do_freepwlcurve -
445 *
446 * Client:
447 *-----------------------------------------------------------------------------
448 */
449void
450NurbsTessellator::do_freepwlcurve( O_pwlcurve *o_pwlcurve )
451{
452 o_pwlcurve->deleteMe( o_pwlcurvePool );
453}
454
455void
456NurbsTessellator::do_freebgncurve( O_curve *o_curve )
457{
458 o_curve->deleteMe( o_curvePool );
459}
460
461/*-----------------------------------------------------------------------------
462 * do_pwlcurve - link in pwl trim loop to the current surface description
463 *
464 * Client: pwlcurve()
465 *-----------------------------------------------------------------------------
466 */
467void
468NurbsTessellator::do_pwlcurve( O_pwlcurve *o_pwlcurve )
469{
470 if( ! inTrim ) {
471 do_nurbserror( 19 );
472 if( o_pwlcurve->save == 0 )
473 do_freepwlcurve(o_pwlcurve );
474 return;
475 }
476
477 if( ! inCurve ) {
478 bgncurve( 0 );
479 inCurve = 2;
480 }
481
482 if( o_pwlcurve->used ) {
483 do_nurbserror( 20 );
484 isDataValid = 0;
485 return;
486 } else
487 o_pwlcurve->used = 1;
488
489 if( currentCurve->curvetype == ct_none ) {
490 currentCurve->curvetype = ct_pwlcurve;
491 } else if( currentCurve->curvetype != ct_pwlcurve ) {
492 do_nurbserror( 21 );
493 isDataValid = 0;
494 return;
495 }
496
497 if( *nextPwlcurve != o_pwlcurve ) {
498 isCurveModified = 1;
499 *nextPwlcurve = o_pwlcurve;
500 }
501 nextPwlcurve = &(o_pwlcurve->next);
502
503 if( o_pwlcurve->owner != currentCurve ) {
504 isCurveModified = 1;
505 o_pwlcurve->owner = currentCurve;
506 }
507
508 if( (inCurve == 2) )
509 endcurve();
510}
511
512
513/*-----------------------------------------------------------------------------
514 * do_freenurbscurve -
515 *
516 * Client:
517 *-----------------------------------------------------------------------------
518 */
519void
520NurbsTessellator::do_freenurbscurve( O_nurbscurve *o_nurbscurve )
521{
522 o_nurbscurve->bezier_curves->deleteMe( quiltPool );
523 o_nurbscurve->deleteMe( o_nurbscurvePool );
524}
525
526
527/*-----------------------------------------------------------------------------
528 * do_nurbscurve -
529 *
530 * Client: nurbscurve()
531 *-----------------------------------------------------------------------------
532 */
533void
534NurbsTessellator::do_nurbscurve( O_nurbscurve *o_nurbscurve )
535{
536 if ( ! inCurve ) {
537 bgncurve( 0 );
538 inCurve = 2;
539 }
540
541 if( o_nurbscurve->used ) {
542 /* error - curve was already called in current surface */
543 do_nurbserror( 23 );
544 isDataValid = 0;
545 return;
546 } else
547 o_nurbscurve->used = 1;
548
549 if( currentCurve->curvetype == ct_none ) {
550 currentCurve->curvetype = ct_nurbscurve;
551 } else if( currentCurve->curvetype != ct_nurbscurve ) {
552 do_nurbserror( 24 );
553 isDataValid = 0;
554 return;
555 }
556
557 if( *nextNurbscurve != o_nurbscurve ) {
558 isCurveModified = 1;
559 *nextNurbscurve = o_nurbscurve;
560 }
561
562 nextNurbscurve = &(o_nurbscurve->next);
563
564 if( o_nurbscurve->owner != currentCurve ) {
565 isCurveModified = 1;
566 o_nurbscurve->owner = currentCurve;
567 }
568
569 if( o_nurbscurve->owner == 0 )
570 isCurveModified = 1;
571
572 if( inCurve == 2 )
573 endcurve();
574}
575
576
577/*-----------------------------------------------------------------------------
578 * do_freenurbssurface -
579 *
580 * Client:
581 *-----------------------------------------------------------------------------
582 */
583
584void
585NurbsTessellator::do_freenurbssurface( O_nurbssurface *o_nurbssurface )
586{
587 o_nurbssurface->bezier_patches->deleteMe( quiltPool );
588 o_nurbssurface->deleteMe( o_nurbssurfacePool );
589}
590
591/*-----------------------------------------------------------------------------
592 * do_nurbssurface -
593 *
594 * Client: nurbssurface()
595 *-----------------------------------------------------------------------------
596 */
597void
598NurbsTessellator::do_nurbssurface( O_nurbssurface *o_nurbssurface )
599{
600 if( ! inSurface ) {
601 bgnsurface( 0 );
602 inSurface = 2;
603 }
604
605 if( o_nurbssurface->used ) {
606 /* error - surface was already called in current block */
607 do_nurbserror( 25 );
608 isDataValid = 0;
609 return;
610 } else
611 o_nurbssurface->used = 1;
612
613 if( *nextNurbssurface != o_nurbssurface ) {
614 isSurfaceModified = 1;
615 *nextNurbssurface = o_nurbssurface;
616 }
617
618 if( o_nurbssurface->owner != currentSurface ) {
619 isSurfaceModified = 1;
620 o_nurbssurface->owner = currentSurface;
621 }
622 nextNurbssurface = &(o_nurbssurface->next);
623
624 if( inSurface == 2 )
625 endsurface();
626}
627
628
629/*-----------------------------------------------------------------------------
630 * do_freenurbsproperty
631 *
632 *-----------------------------------------------------------------------------
633 */
634
635void
636NurbsTessellator::do_freenurbsproperty( Property *prop )
637{
638 prop->deleteMe( propertyPool );
639}
640
641
642/*-----------------------------------------------------------------------------
643 * do_setnurbsproperty -
644 *
645 *-----------------------------------------------------------------------------
646 */
647
648void
649NurbsTessellator::do_setnurbsproperty( Property *prop )
650{
651 renderhints.setProperty( prop->tag, prop->value );
652 if( prop->save == 0 )
653 do_freenurbsproperty( prop );
654}
655
656void
657NurbsTessellator::do_setnurbsproperty2( Property *prop )
658{
659 Mapdesc *mapdesc = maplist.find( prop->type );
660
661 mapdesc->setProperty( prop->tag, prop->value );
662 if( prop->save == 0 )
663 do_freenurbsproperty( prop );
664}
665
666void
667NurbsTessellator::errorHandler( int )
668{
669}
670
671void
672NurbsTessellator::do_nurbserror( int msg )
673{
674 errorHandler( msg );
675}
676
677int
678NurbsTessellator::do_check_knots( Knotvector *knots, const char *msg )
679{
680 int status = knots->validate();
681 if( status ) {
682 do_nurbserror( status );
683 if( renderhints.errorchecking != N_NOMSG ) knots->show( msg );
684 }
685 return status;
686}
687
688
689
690
691
Definition quilt.h:64