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root/radiance/ray/src/hd/sm.c

Comparing ray/src/hd/sm.c (file contents):
Revision 3.1 by gwlarson, Wed Aug 19 17:45:23 1998 UTC vs.
Revision 3.8 by gwlarson, Tue Oct 6 18:16:54 1998 UTC

#	Line 8 | Line 8 | static char SCCSid[] = "$SunId$ SGI";
8		*  sm.c
9		*/
10		#include "standard.h"
11	<
12	<	#include "object.h"
13	<
11	>	#include "sm_flag.h"
12		#include "sm_list.h"
13		#include "sm_geom.h"
14	+	#include "sm_qtree.h"
15	+	#include "sm_stree.h"
16		#include "sm.h"
17
18
19		SM *smMesh = NULL;
20		double smDist_sum=0;
21		int smNew_tri_cnt=0;
22	+	double smMinSampDiff = 1e-4;
23
24	+	static FVECT smDefault_base[4] = { {SQRT3_INV, SQRT3_INV, SQRT3_INV},
25	+	{-SQRT3_INV, -SQRT3_INV, SQRT3_INV},
26	+	{-SQRT3_INV, SQRT3_INV, -SQRT3_INV},
27	+	{SQRT3_INV, -SQRT3_INV, -SQRT3_INV}};
28	+	static int smTri_verts[4][3] = { {2,1,0},{3,2,0},{1,3,0},{2,3,1}};
29	+
30	+	static int smBase_nbrs[4][3] =  { {3,2,1},{3,0,2},{3,1,0},{1,2,0}};
31	+
32		#ifdef TEST_DRIVER
24	–	VIEW  View = {0,{0,0,0},{0,0,-1},{0,1,0},60,60,0};
33		VIEW  Current_View = {0,{0,0,0},{0,0,-1},{0,1,0},60,60,0};
34		int Pick_cnt =0;
35	<	int Pick_tri = -1,Picking = FALSE;
35	>	int Pick_tri = -1,Picking = FALSE,Pick_samp=-1;
36		FVECT Pick_point[500],Pick_origin,Pick_dir;
37		FVECT  Pick_v0[500], Pick_v1[500], Pick_v2[500];
38		FVECT P0,P1,P2;
#	Line 37 | Line 45 | smDir(sm,ps,id)
45		FVECT ps;
46		int id;
47		{
48	<	FVECT p;
49	<
42	<	VCOPY(p,SM_NTH_WV(sm,id));
43	<	point_on_sphere(ps,p,SM_VIEW_CENTER(sm));
48	>	VSUB(ps,SM_NTH_WV(sm,id),SM_VIEW_CENTER(sm));
49	>	normalize(ps);
50		}
51
52	<	smClear_mesh(sm)
53	<	SM *sm;
52	>	smDir_in_cone(sm,ps,id)
53	>	SM *sm;
54	>	FVECT ps;
55	>	int id;
56		{
57	<	/* Reset the triangle counters */
58	<	SM_TRI_CNT(sm) = 0;
59	<	SM_NUM_TRIS(sm) = 0;
52	<	SM_FREE_TRIS(sm) = -1;
57	>
58	>	VSUB(ps,SM_NTH_WV(sm,id),SM_VIEW_CENTER(sm));
59	>	normalize(ps);
60		}
61
62		smClear_flags(sm,which)
#	Line 60 | Line 67 | int which;
67
68		if(which== -1)
69		for(i=0; i < T_FLAGS;i++)
70	<	bzero(SM_NTH_FLAGS(sm,i),T_TOTAL_FLAG_BYTES(SM_MAX_TRIS(sm)));
70	>	bzero(SM_NTH_FLAGS(sm,i),FLAG_BYTES(SM_MAX_TRIS(sm)));
71		else
72	<	bzero(SM_NTH_FLAGS(sm,which),T_TOTAL_FLAG_BYTES(SM_MAX_TRIS(sm)));
72	>	bzero(SM_NTH_FLAGS(sm,which),FLAG_BYTES(SM_MAX_TRIS(sm)));
73		}
74
75	<	smClear_locator(sm)
76	<	SM *sm;
75	>	/* Given an allocated mesh- initialize */
76	>	smInit_mesh(sm)
77	>	SM *sm;
78		{
79	<	STREE  *st;
80	<
81	<	st = SM_LOCATOR(sm);
82	<
83	<	stClear(st);
79	>	/* Reset the triangle counters */
80	>	SM_NUM_TRI(sm) = 0;
81	>	SM_SAMPLE_TRIS(sm) = 0;
82	>	SM_FREE_TRIS(sm) = -1;
83	>	smClear_flags(sm,-1);
84		}
85
78	–	smInit_locator(sm,center,base)
79	–	SM *sm;
80	–	FVECT  center,base[4];
81	–	{
82	–	STREE  *st;
83	–
84	–	st = SM_LOCATOR(sm);
85	–
86	–	stInit(st,center,base);
86
87	<	}
88	<
87	>	/* Clear the SM for reuse: free any extra allocated memory:does initialization
88	>	as well
89	>	*/
90		smClear(sm)
91		SM *sm;
92		{
93		smClear_samples(sm);
94	–	smClear_mesh(sm);
94		smClear_locator(sm);
95	+	smInit_mesh(sm);
96		}
97
98	+	static int realloc_cnt=0;
99	+
100		int
101	<	smAlloc_tris(sm,max_verts,max_tris)
101	>	smRealloc_mesh(sm)
102		SM *sm;
103	+	{
104	+	int fbytes,i,max_tris,max_verts;
105	+
106	+	if(realloc_cnt <=0)
107	+	realloc_cnt = SM_MAX_TRIS(sm);
108	+
109	+	max_tris = SM_MAX_TRIS(sm) + realloc_cnt;
110	+	fbytes = FLAG_BYTES(max_tris);
111	+
112	+	if(!(SM_TRIS(sm) = (TRI *)realloc(SM_TRIS(sm),max_tris*sizeof(TRI))))
113	+	goto memerr;
114	+
115	+	for(i=0; i< T_FLAGS; i++)
116	+	if(!(SM_NTH_FLAGS(sm,i)=(int4 *)realloc((char *)SM_NTH_FLAGS(sm,i),fbytes)))
117	+	goto memerr;
118	+
119	+	SM_MAX_TRIS(sm) = max_tris;
120	+	return(max_tris);
121	+
122	+	memerr:
123	+	error(SYSTEM, "out of memory in smRealloc_mesh()");
124	+	}
125	+
126	+	/* Allocate and initialize a new mesh with max_verts and max_tris */
127	+	int
128	+	smAlloc_mesh(sm,max_verts,max_tris)
129	+	SM *sm;
130		int max_verts,max_tris;
131		{
132	<	int i,nbytes,vbytes,fbytes;
132	>	int fbytes,i;
133
134	<	vbytes = max_verts*sizeof(VERT);
106	<	fbytes = T_TOTAL_FLAG_BYTES(max_tris);
107	<	nbytes = vbytes + max_tris*sizeof(TRI) +T_FLAGS*fbytes + 8;
108	<	for(i = 1024; nbytes > i; i <<= 1)
109	<	;
110	<	/* check if casting works correctly */
111	<	max_tris = (i-vbytes-8)/(sizeof(TRI) + T_FLAG_BYTES);
112	<	fbytes = T_TOTAL_FLAG_BYTES(max_tris);
113	<
114	<	SM_BASE(sm)=(char *)malloc(vbytes+max_tris*sizeof(TRI)+T_FLAGS*fbytes);
134	>	fbytes = FLAG_BYTES(max_tris);
135
136	<	if (SM_BASE(sm) == NULL)
137	<	return(0);
136	>	if(!(SM_TRIS(sm) = (TRI *)realloc(NULL,max_tris*sizeof(TRI))))
137	>	goto memerr;
138
139	<	SM_TRIS(sm) = (TRI *)SM_BASE(sm);
140	<	SM_VERTS(sm) = (VERT *)(SM_TRIS(sm) + max_tris);
139	>	if(!(SM_VERTS(sm) = (VERT *)realloc(NULL,max_verts*sizeof(VERT))))
140	>	goto memerr;
141
142	<	SM_NTH_FLAGS(sm,0) = (int4 *)(SM_VERTS(sm) + max_verts);
143	<	for(i=1; i < T_FLAGS; i++)
144	<	SM_NTH_FLAGS(sm,i) = (int4 *)(SM_NTH_FLAGS(sm,i-1)+fbytes/sizeof(int4));
145	<
142	>	for(i=0; i< T_FLAGS; i++)
143	>	if(!(SM_NTH_FLAGS(sm,i)=(int4 *)realloc(NULL,fbytes)))
144	>	goto memerr;
145	>
146		SM_MAX_VERTS(sm) = max_verts;
147		SM_MAX_TRIS(sm) = max_tris;
148
149	<	smClear_mesh(sm);
149	>	realloc_cnt = max_verts >> 1;
150
151	+	smInit_mesh(sm);
152	+
153		return(max_tris);
154	+	memerr:
155	+	error(SYSTEM, "out of memory in smAlloc_mesh()");
156		}
157
158
135	–
159		int
160	<	smAlloc_locator(sm)
160	>	smAlloc_tri(sm)
161		SM *sm;
162		{
163	<	STREE  *st;
164	<
165	<	st = SM_LOCATOR(sm);
166	<
167	<	st = stAlloc(st);
168	<
169	<	if(st)
170	<	return(TRUE);
171	<	else
172	<	return(FALSE);
163	>	int id;
164	>
165	>	/* First check if there are any tris on the free list */
166	>	/* Otherwise, have we reached the end of the list yet?*/
167	>	if(SM_NUM_TRI(sm) < SM_MAX_TRIS(sm))
168	>	return(SM_NUM_TRI(sm)++);
169	>
170	>	if((id = SM_FREE_TRIS(sm)) != -1)
171	>	{
172	>	SM_FREE_TRIS(sm) =  T_NEXT_FREE(SM_NTH_TRI(sm,id));
173	>	return(id);
174	>	}
175	>
176	>	/*Else: realloc */
177	>	smRealloc_mesh(sm);
178	>	return(SM_NUM_TRI(sm)++);
179		}
180
181	+	smFree_mesh(sm)
182	+	SM *sm;
183	+	{
184	+	int i;
185	+
186	+	if(SM_TRIS(sm))
187	+	free(SM_TRIS(sm));
188	+	if(SM_VERTS(sm))
189	+	free(SM_VERTS(sm));
190	+	for(i=0; i< T_FLAGS; i++)
191	+	if(SM_NTH_FLAGS(sm,i))
192	+	free(SM_NTH_FLAGS(sm,i));
193	+	}
194	+
195	+
196		/* Initialize/clear global smL sample list for at least n samples */
197		smAlloc(max_samples)
198		register int max_samples;
#	Line 156 | Line 200 | smAlloc(max_samples)
200		unsigned nbytes;
201		register unsigned i;
202		int total_points;
203	<	int max_tris;
203	>	int max_tris,n;
204
205	+	n = max_samples;
206		/* If this is the first call, allocate sample,vertex and triangle lists */
207		if(!smMesh)
208		{
209		if(!(smMesh = (SM *)malloc(sizeof(SM))))
210	<	error(SYSTEM,"smAlloc():Unable to allocate memory");
210	>	error(SYSTEM,"smAlloc():Unable to allocate memory\n");
211		bzero(smMesh,sizeof(SM));
212		}
213		else
214		{   /* If existing structure: first deallocate */
215	<	if(SM_BASE(smMesh))
216	<	free(SM_BASE(smMesh));
217	<	if(SM_SAMP_BASE(smMesh))
218	<	free(SM_SAMP_BASE(smMesh));
174	<	}
215	>	smFree_mesh(smMesh);
216	>	smFree_samples(smMesh);
217	>	smFree_locator(smMesh);
218	>	}
219
220		/* First allocate at least n samples + extra points:at least enough
221		necessary to form the BASE MESH- Default = 4;
222		*/
223	<	max_samples = smAlloc_samples(smMesh, max_samples,SM_EXTRA_POINTS);
223	>	SM_SAMP(smMesh) = sAlloc(&n,SM_EXTRA_POINTS);
224
225	<	total_points = max_samples + SM_EXTRA_POINTS;
182	<	max_tris = total_points*2;
225	>	total_points = n + SM_EXTRA_POINTS;
226
227	+	max_tris = total_points*4;
228		/* Now allocate space for mesh vertices and triangles */
229	<	max_tris = smAlloc_tris(smMesh, total_points, max_tris);
229	>	max_tris = smAlloc_mesh(smMesh, total_points, max_tris);
230
231		/* Initialize the structure for point,triangle location.
232		*/
233		smAlloc_locator(smMesh);
190	–
234		}
235
236
237
238	<	smInit_mesh(sm,vp)
238	>	smInit_sm(sm,vp)
239		SM *sm;
240		FVECT vp;
241		{
242
200	–	/* NOTE: Should be elsewhere?*/
243		smDist_sum = 0;
244		smNew_tri_cnt = 0;
245
246	<	VCOPY(SM_VIEW_CENTER(smMesh),vp);
247	<	smClear_locator(sm);
248	<	smInit_locator(sm,vp,0);
249	<	smClear_aux_samples(sm);
208	<	smClear_mesh(sm);
246	>	VCOPY(SM_VIEW_CENTER(sm),vp);
247	>	smInit_locator(sm,vp);
248	>	smInit_samples(sm);
249	>	smInit_mesh(sm);
250		smCreate_base_mesh(sm,SM_DEFAULT);
251		}
252
#	Line 226 | Line 267 | smInit(n)
267		{
268		int max_vertices;
269
270	<	sleep(10);
230	<
270	>
271		/* If n <=0, Just clear the existing structures */
272		if(n <= 0)
273		{
#	Line 241 | Line 281 | smInit(n)
281		max_vertices = n + SM_EXTRA_POINTS;
282
283		/* If the current mesh contains enough room, clear and return */
284	<	if(smMesh && max_vertices <= SM_MAX_VERTS(smMesh))
284	>	if(smMesh && (max_vertices <= SM_MAX_VERTS(smMesh)) && SM_MAX_SAMP(smMesh) <=
285	>	n && SM_MAX_POINTS(smMesh) <= max_vertices)
286		{
287		smClear(smMesh);
288		return(SM_MAX_SAMP(smMesh));
#	Line 255 | Line 296 | smInit(n)
296		}
297
298
299	<	int
300	<	smLocator_apply_func(sm,v0,v1,v2,func,arg)
301	<	SM *sm;
302	<	FVECT v0,v1,v2;
303	<	int (*func)();
304	<	char *arg;
299	>	smLocator_apply_func(sm,v0,v1,v2,edge_func,tri_func,argptr)
300	>	SM *sm;
301	>	FVECT v0,v1,v2;
302	>	int (*edge_func)();
303	>	int (*tri_func)();
304	>	int *argptr;
305		{
306		STREE *st;
266	–	char found;
307		FVECT p0,p1,p2;
308
309		st = SM_LOCATOR(sm);
310
311	<	point_on_sphere(p0,v0,SM_VIEW_CENTER(sm));
312	<	point_on_sphere(p1,v1,SM_VIEW_CENTER(sm));
313	<	point_on_sphere(p2,v2,SM_VIEW_CENTER(sm));
311	>	VSUB(p0,v0,SM_VIEW_CENTER(sm));
312	>	VSUB(p1,v1,SM_VIEW_CENTER(sm));
313	>	VSUB(p2,v2,SM_VIEW_CENTER(sm));
314
315	<	found = stApply_to_tri_cells(st,p0,p1,p2,func,arg);
315	>	stApply_to_tri(st,p0,p1,p2,edge_func,tri_func,argptr);
316
277	–	return(found);
317		}
318
319	+	QUADTREE
320	+	delete_tri_set(qt,optr,del_set)
321	+	QUADTREE qt;
322	+	OBJECT *optr,*del_set;
323	+	{
324
325	<	int
326	<	smLocator_add_tri(sm,t_id,v0_id,v1_id,v2_id)
325	>	int set_size,i,t_id;
326	>	OBJECT *rptr,r_set[QT_MAXSET+1];
327	>	OBJECT *tptr,t_set[QT_MAXSET+1],*sptr;
328	>
329	>	/* First need to check if set size larger than QT_MAXSET: if so
330	>	need to allocate larger array
331	>	*/
332	>	if((set_size = MAX(QT_SET_CNT(optr),QT_SET_CNT(del_set))) >QT_MAXSET)
333	>	rptr = (OBJECT *)malloc((set_size+1)*sizeof(OBJECT));
334	>	else
335	>	rptr = r_set;
336	>	if(!rptr)
337	>	goto memerr;
338	>	setintersect(rptr,del_set,optr);
339	>
340	>	if(QT_SET_CNT(rptr) > 0)
341	>	{
342	>	/* First need to check if set size larger than QT_MAXSET: if so
343	>	need to allocate larger array
344	>	*/
345	>	sptr = QT_SET_PTR(rptr);
346	>	for(i = QT_SET_CNT(rptr); i > 0; i--)
347	>	{
348	>	t_id = QT_SET_NEXT_ELEM(sptr);
349	>	qt = qtdelelem(qt,t_id);
350	>	}
351	>	}
352	>	/* If we allocated memory: free it */
353	>	if(rptr != r_set)
354	>	free(rptr);
355	>
356	>	return(qt);
357	>	memerr:
358	>	error(SYSTEM,"delete_tri_set():Unable to allocate memory");
359	>	}
360	>
361	>	QUADTREE
362	>	expand_node(qt,q0,q1,q2,optr,n)
363	>	QUADTREE qt;
364	>	FVECT q0,q1,q2;
365	>	OBJECT *optr;
366	>	int n;
367	>	{
368	>	OBJECT *tptr,t_set[QT_MAXSET+1];
369	>	int i,t_id,found;
370	>	TRI *t;
371	>	FVECT v0,v1,v2;
372	>
373	>	if(QT_SET_CNT(optr) > QT_MAXSET)
374	>	tptr = (OBJECT *)malloc((QT_SET_CNT(optr)+1)*sizeof(OBJECT));
375	>	else
376	>	tptr = t_set;
377	>	if(!tptr)
378	>	goto memerr;
379	>
380	>	qtgetset(tptr,qt);
381	>	/* If set size exceeds threshold: subdivide cell and reinsert tris*/
382	>	qtfreeleaf(qt);
383	>	qtSubdivide(qt);
384	>
385	>	for(optr = QT_SET_PTR(tptr),i=QT_SET_CNT(tptr); i > 0; i--)
386	>	{
387	>	t_id = QT_SET_NEXT_ELEM(optr);
388	>	t = SM_NTH_TRI(smMesh,t_id);
389	>	if(!T_IS_VALID(t))
390	>	continue;
391	>	VSUB(v0,SM_T_NTH_WV(smMesh,t,0),SM_VIEW_CENTER(smMesh));
392	>	VSUB(v1,SM_T_NTH_WV(smMesh,t,1),SM_VIEW_CENTER(smMesh));
393	>	VSUB(v2,SM_T_NTH_WV(smMesh,t,2),SM_VIEW_CENTER(smMesh));
394	>	qt = qtAdd_tri(qt,q0,q1,q2,v0,v1,v2,t_id,n);
395	>	}
396	>	/* If we allocated memory: free it */
397	>	if( tptr != t_set)
398	>	free(tptr);
399	>
400	>	return(qt);
401	>	memerr:
402	>	error(SYSTEM,"expand_node():Unable to allocate memory");
403	>	}
404	>
405	>	add_tri_expand(qtptr,f,argptr,q0,q1,q2,t0,t1,t2,n)
406	>	QUADTREE *qtptr;
407	>	int *f;
408	>	ADD_ARGS *argptr;
409	>	FVECT q0,q1,q2;
410	>	FVECT t0,t1,t2;
411	>	int n;
412	>	{
413	>	int t_id;
414	>	OBJECT *optr,*del_set;
415	>
416	>	t_id = argptr->t_id;
417	>
418	>	if(QT_IS_EMPTY(*qtptr))
419	>	{
420	>	*qtptr = qtaddelem(*qtptr,t_id);
421	>	return;
422	>	}
423	>	if(!QT_LEAF_IS_FLAG(*qtptr))
424	>	{
425	>	optr = qtqueryset(*qtptr);
426	>
427	>	if(del_set=argptr->del_set)
428	>	*qtptr = delete_tri_set(*qtptr,optr,del_set);
429	>	*qtptr = qtaddelem(*qtptr,t_id);
430	>	}
431	>	if (n >= QT_MAX_LEVELS)
432	>	return;
433	>	optr = qtqueryset(*qtptr);
434	>	if(QT_SET_CNT(optr) < QT_SET_THRESHOLD)
435	>	return;
436	>	*qtptr = expand_node(*qtptr,q0,q1,q2,optr,n);
437	>	}
438	>
439	>
440	>
441	>	add_tri(qtptr,fptr,argptr)
442	>	QUADTREE *qtptr;
443	>	int *fptr;
444	>	ADD_ARGS *argptr;
445	>	{
446	>
447	>	OBJECT *optr,*del_set;
448	>	int t_id;
449	>
450	>	t_id = argptr->t_id;
451	>
452	>
453	>	if(QT_IS_EMPTY(*qtptr))
454	>	{
455	>	*qtptr = qtaddelem(*qtptr,t_id);
456	>	if(!QT_FLAG_FILL_TRI(*fptr))
457	>	(*fptr)++;
458	>	return;
459	>	}
460	>	if(QT_LEAF_IS_FLAG(*qtptr))
461	>	return;
462	>
463	>	optr = qtqueryset(*qtptr);
464	>
465	>	if(del_set = argptr->del_set)
466	>	*qtptr = delete_tri_set(*qtptr,optr,del_set);
467	>
468	>	if(!QT_IS_EMPTY(*qtptr))
469	>	{
470	>	optr = qtqueryset(*qtptr);
471	>	if(QT_SET_CNT(optr) >= QT_SET_THRESHOLD)
472	>	(*fptr) |= QT_EXPAND;
473	>	}
474	>	if(!QT_FLAG_FILL_TRI(*fptr))
475	>	(*fptr)++;
476	>	*qtptr = qtaddelem(*qtptr,t_id);
477	>
478	>	}
479	>
480	>
481	>	smLocator_add_tri(sm,t_id,v0_id,v1_id,v2_id,del_set)
482		SM *sm;
483		int t_id;
484	<	int v0_id,v1_id,v2_id;
484	>	int v0_id,v1_id,v2_id;
485	>	OBJECT *del_set;
486		{
487		STREE *st;
488	<	FVECT p0,p1,p2;
489	<
488	>	FVECT v0,v1,v2;
489	>	ADD_ARGS args;
490	>
491		st = SM_LOCATOR(sm);
492
292	–	smDir(sm,p0,v0_id);
293	–	smDir(sm,p1,v1_id);
294	–	smDir(sm,p2,v2_id);
493
494	<	stAdd_tri(st,t_id,p0,p1,p2);
494	>	VSUB(v0,SM_NTH_WV(sm,v0_id),SM_VIEW_CENTER(sm));
495	>	VSUB(v1,SM_NTH_WV(sm,v1_id),SM_VIEW_CENTER(sm));
496	>	VSUB(v2,SM_NTH_WV(sm,v2_id),SM_VIEW_CENTER(sm));
497
498	<	return(1);
498	>	qtClearAllFlags();
499	>	args.t_id = t_id;
500	>	args.del_set = del_set;
501	>
502	>	stApply_to_tri(st,v0,v1,v2,add_tri,add_tri_expand,&args);
503	>
504		}
505
506		/* Add a triangle to the base array with vertices v1-v2-v3 */
507		int
508	<	smAdd_tri(sm, v0_id,v1_id,v2_id,tptr)
508	>	smAdd_tri(sm, v0_id,v1_id,v2_id)
509		SM *sm;
510		int v0_id,v1_id,v2_id;
306	–	TRI **tptr;
511		{
512		int t_id;
513		TRI *t;
514
515	+	t_id = smAlloc_tri(sm);
516
312	–	if(SM_TRI_CNT(sm)+1 > SM_MAX_TRIS(sm))
313	–	error(SYSTEM,"smAdd_tri():Too many triangles");
314	–
315	–	/* Get the id for the next available triangle */
316	–	SM_FREE_TRI_ID(sm,t_id);
517		if(t_id == -1)
518		return(t_id);
519
520		t = SM_NTH_TRI(sm,t_id);
521	+
522		T_CLEAR_NBRS(t);
523	+	/* set the triangle vertex ids */
524	+	T_NTH_V(t,0) = v0_id;
525	+	T_NTH_V(t,1) = v1_id;
526	+	T_NTH_V(t,2) = v2_id;
527
528	+	SM_NTH_VERT(sm,v0_id) = t_id;
529	+	SM_NTH_VERT(sm,v1_id) = t_id;
530	+	SM_NTH_VERT(sm,v2_id) = t_id;
531	+
532		if(SM_BASE_ID(sm,v0_id) || SM_BASE_ID(sm,v1_id) || SM_BASE_ID(sm,v2_id))
533		{
534		smClear_tri_flags(sm,t_id);
#	Line 327 | Line 536 | TRI **tptr;
536		}
537		else
538		{
539	<	SM_CLEAR_NTH_T_BASE(sm,t_id);
539	>	SM_CLR_NTH_T_BASE(sm,t_id);
540		SM_SET_NTH_T_ACTIVE(sm,t_id);
332	–	SM_SET_NTH_T_LRU(sm,t_id);
541		SM_SET_NTH_T_NEW(sm,t_id);
542	<	SM_NUM_TRIS(sm)++;
542	>	S_SET_FLAG(T_NTH_V(t,0));
543	>	S_SET_FLAG(T_NTH_V(t,1));
544	>	S_SET_FLAG(T_NTH_V(t,2));
545	>	SM_SAMPLE_TRIS(sm)++;
546		smNew_tri_cnt++;
547		}
337	–	/* set the triangle vertex ids */
338	–	T_NTH_V(t,0) = v0_id;
339	–	T_NTH_V(t,1) = v1_id;
340	–	T_NTH_V(t,2) = v2_id;
548
342	–	SM_NTH_VERT(sm,v0_id) = t_id;
343	–	SM_NTH_VERT(sm,v1_id) = t_id;
344	–	SM_NTH_VERT(sm,v2_id) = t_id;
345	–
346	–	/* Add triangle to the locator */
347	–	smLocator_add_tri(sm,t_id,v0_id,v1_id,v2_id);
348	–	if(t)
349	–	*tptr = t;
549		/* return initialized triangle */
550		return(t_id);
551		}
552
354	–	int
355	–	smClosest_vertex_in_tri(sm,v0_id,v1_id,v2_id,p,eps)
356	–	SM *sm;
357	–	int v0_id,v1_id,v2_id;
358	–	FVECT p;
359	–	double eps;
360	–	{
361	–	FVECT v;
362	–	double d,d0,d1,d2;
363	–	int closest = -1;
553
365	–	if(v0_id != -1)
366	–	{
367	–	smDir(sm,v,v0_id);
368	–	d0 = DIST(p,v);
369	–	if(eps < 0 || d0 < eps)
370	–	{
371	–	closest = v0_id;
372	–	d = d0;
373	–	}
374	–	}
375	–	if(v1_id != -1)
376	–	{
377	–	smDir(sm,v,v1_id);
378	–	d1 = DIST(p,v);
379	–	if(closest== -1)
380	–	{
381	–	if(eps < 0 || d1 < eps)
382	–	{
383	–	closest = v1_id;
384	–	d = d1;
385	–	}
386	–	}
387	–	else
388	–	if(d1 < d2)
389	–	{
390	–	if((eps < 0) ||  d1 < eps)
391	–	{
392	–	closest = v1_id;
393	–	d = d1;
394	–	}
395	–	}
396	–	else
397	–	if((eps < 0) ||  d2 < eps)
398	–	{
399	–	closest = v2_id;
400	–	d = d2;
401	–	}
402	–	}
403	–	if(v2_id != -1)
404	–	{
405	–	smDir(sm,v,v2_id);
406	–	d2 = DIST(p,v);
407	–	if((eps < 0) ||  d2 < eps)
408	–	if(closest== -1 ||(d2 < d))
409	–	return(v2_id);
410	–	}
411	–	return(closest);
412	–	}
413	–
414	–
415	–	int
416	–	smClosest_vertex_in_w_tri(sm,v0_id,v1_id,v2_id,p)
417	–	SM *sm;
418	–	int v0_id,v1_id,v2_id;
419	–	FVECT p;
420	–	{
421	–	FVECT v;
422	–	double d,d0,d1,d2;
423	–	int closest;
424	–
425	–	VCOPY(v,SM_NTH_WV(sm,v0_id));
426	–	d = d0 = DIST(p,v);
427	–	closest = v0_id;
428	–
429	–	VCOPY(v,SM_NTH_WV(sm,v1_id));
430	–	d1 = DIST(p,v);
431	–	if(d1 < d2)
432	–	{
433	–	closest = v1_id;
434	–	d = d1;
435	–	}
436	–	VCOPY(v,SM_NTH_WV(sm,v2_id));
437	–	d2 = DIST(p,v);
438	–	if(d2 < d)
439	–	return(v2_id);
440	–	else
441	–	return(closest);
442	–	}
443	–
554		void
555	<	smTris_swap_edge(sm,t_id,t1_id,e,e1,tn_id,tn1_id)
555	>	smTris_swap_edge(sm,t_id,t1_id,e,e1,tn_id,tn1_id,add_ptr,delptr)
556		SM *sm;
557		int t_id,t1_id;
558		int e,e1;
559	<	int **tn_id,**tn1_id;
559	>	int *tn_id,*tn1_id;
560	>	LIST **add_ptr;
561	>	QUADTREE *delptr;
562
563		{
452	–	TRI *t,*t1;
453	–	TRI *ta,*tb;
564		int verts[3],enext,eprev,e1next,e1prev;
565		TRI *n;
566		FVECT p1,p2,p3;
#	Line 459 | Line 569 | smTris_swap_edge(sm,t_id,t1_id,e,e1,tn_id,tn1_id)
569		defined by quadrilateral
570		formed by t,t1- swap for the opposite diagonal
571		*/
462	–	t = SM_NTH_TRI(sm,t_id);
463	–	t1 = SM_NTH_TRI(sm,t1_id);
572		enext = (e+1)%3;
573		eprev = (e+2)%3;
574		e1next = (e1+1)%3;
575		e1prev = (e1+2)%3;
576	<	verts[e] = T_NTH_V(t,e);
577	<	verts[enext] = T_NTH_V(t1,e1prev);
578	<	verts[eprev] = T_NTH_V(t,eprev);
579	<	ta_id = smAdd_tri(sm,verts[0],verts[1],verts[2],&ta);
576	>	verts[e] = T_NTH_V(SM_NTH_TRI(sm,t_id),e);
577	>	verts[enext] = T_NTH_V(SM_NTH_TRI(sm,t1_id),e1prev);
578	>	verts[eprev] = T_NTH_V(SM_NTH_TRI(sm,t_id),eprev);
579	>	ta_id = smAdd_tri(sm,verts[0],verts[1],verts[2]);
580	>	*add_ptr = push_data(*add_ptr,ta_id);
581	>	verts[e1] = T_NTH_V(SM_NTH_TRI(sm,t1_id),e1);
582	>	verts[e1next] = T_NTH_V(SM_NTH_TRI(sm,t_id),eprev);
583	>	verts[e1prev] = T_NTH_V(SM_NTH_TRI(sm,t1_id),e1prev);
584	>	tb_id = smAdd_tri(sm,verts[0],verts[1],verts[2]);
585	>	*add_ptr = push_data(*add_ptr,tb_id);
586
473	–	verts[e1] = T_NTH_V(t1,e1);
474	–	verts[e1next] = T_NTH_V(t,eprev);
475	–	verts[e1prev] = T_NTH_V(t1,e1prev);
476	–	tb_id = smAdd_tri(sm,verts[0],verts[1],verts[2],&tb);
477	–
587		/* set the neighbors */
588	<	T_NTH_NBR(ta,e) = T_NTH_NBR(t1,e1next);
589	<	T_NTH_NBR(tb,e1) = T_NTH_NBR(t,enext);
590	<	T_NTH_NBR(ta,enext) = tb_id;
591	<	T_NTH_NBR(tb,e1next) = ta_id;
592	<	T_NTH_NBR(ta,eprev) = T_NTH_NBR(t,eprev);
593	<	T_NTH_NBR(tb,e1prev) = T_NTH_NBR(t1,e1prev);
588	>	T_NTH_NBR(SM_NTH_TRI(sm,ta_id),e) = T_NTH_NBR(SM_NTH_TRI(sm,t1_id),e1next);
589	>	T_NTH_NBR(SM_NTH_TRI(sm,tb_id),e1) = T_NTH_NBR(SM_NTH_TRI(sm,t_id),enext);
590	>	T_NTH_NBR(SM_NTH_TRI(sm,ta_id),enext) =tb_id;
591	>	T_NTH_NBR(SM_NTH_TRI(sm,tb_id),e1next) = ta_id;
592	>	T_NTH_NBR(SM_NTH_TRI(sm,ta_id),eprev)=T_NTH_NBR(SM_NTH_TRI(sm,t_id),eprev);
593	>	T_NTH_NBR(SM_NTH_TRI(sm,tb_id),e1prev)=
594	>	T_NTH_NBR(SM_NTH_TRI(sm,t1_id),e1prev);
595
596		/* Reset neighbor pointers of original neighbors */
597	<	n = SM_NTH_TRI(sm,T_NTH_NBR(t,enext));
597	>	n = SM_NTH_TRI(sm,T_NTH_NBR(SM_NTH_TRI(sm,t_id),enext));
598		T_NTH_NBR(n,T_NTH_NBR_PTR(t_id,n)) = tb_id;
599	<	n = SM_NTH_TRI(sm,T_NTH_NBR(t,eprev));
599	>	n = SM_NTH_TRI(sm,T_NTH_NBR(SM_NTH_TRI(sm,t_id),eprev));
600		T_NTH_NBR(n,T_NTH_NBR_PTR(t_id,n)) = ta_id;
601
602	<	n = SM_NTH_TRI(sm,T_NTH_NBR(t1,e1next));
602	>	n = SM_NTH_TRI(sm,T_NTH_NBR(SM_NTH_TRI(sm,t1_id),e1next));
603		T_NTH_NBR(n,T_NTH_NBR_PTR(t1_id,n)) = ta_id;
604	<	n = SM_NTH_TRI(sm,T_NTH_NBR(t1,e1prev));
604	>	n = SM_NTH_TRI(sm,T_NTH_NBR(SM_NTH_TRI(sm,t1_id),e1prev));
605		T_NTH_NBR(n,T_NTH_NBR_PTR(t1_id,n)) = tb_id;
606
607		/* Delete two parent triangles */
608	<	smDelete_tri(sm,t_id);
609	<	smDelete_tri(sm,t1_id);
608	>	if(remove_from_list(t_id,add_ptr))
609	>	smDelete_tri(sm,t_id);
610	>	else
611	>	*delptr = qtaddelem(*delptr,t_id);
612	>
613	>	if(remove_from_list(t1_id,add_ptr))
614	>	smDelete_tri(sm,t1_id);
615	>	else
616	>	*delptr = qtaddelem(*delptr,t1_id);
617	>
618		*tn_id = ta_id;
619		*tn1_id = tb_id;
620		}
621
622	+	smUpdate_locator(sm,add_list,del_set)
623	+	SM *sm;
624	+	LIST *add_list;
625	+	OBJECT *del_set;
626	+	{
627	+	int t_id,i;
628	+	TRI *t;
629	+	OBJECT *optr;
630	+
631	+	while(add_list)
632	+	{
633	+	t_id = pop_list(&add_list);
634	+	t = SM_NTH_TRI(sm,t_id);
635	+	smLocator_add_tri(sm,t_id,T_NTH_V(t,0),T_NTH_V(t,1),T_NTH_V(t,2),del_set);
636	+	}
637	+
638	+	optr = QT_SET_PTR(del_set);
639	+	for(i = QT_SET_CNT(del_set); i > 0; i--)
640	+	{
641	+	t_id = QT_SET_NEXT_ELEM(optr);
642	+	#if 0
643	+	t = SM_NTH_TRI(sm,t_id);
644	+	smLocator_remove_tri(sm,t_id,T_NTH_V(t,0),T_NTH_V(t,1),T_NTH_V(t,2));
645	+	#endif
646	+	smDelete_tri(sm,t_id);
647	+	}
648	+	}
649		/* MUST add check for constrained edges */
650	<	char
651	<	smFix_tris(sm,id,tlist)
650	>	int
651	>	smFix_tris(sm,id,tlist,add_list,delptr)
652		SM *sm;
653		int id;
654	<	LIST *tlist;
654	>	LIST *tlist,*add_list;
655	>	QUADTREE *delptr;
656		{
657		TRI *t,*t_opp;
658	<	FVECT p,p1,np,p2,p3;
659	<	int swapped = 0;
514	<	int e,e1,e_id;
515	<	char debug = 0;
658	>	FVECT p,p1,p2,p3;
659	>	int e,e1,swapped = 0;
660		int t_id,t_opp_id;
661	<
662	<	VCOPY(p,SM_NTH_WV(sm,id));
519	<	VSUB(p,p,SM_VIEW_CENTER(sm));
661	>
662	>	VSUB(p,SM_NTH_WV(sm,id),SM_VIEW_CENTER(sm));
663		while(tlist)
664		{
665	<	t_id = (int)pop_list(&tlist);
665	>	t_id = pop_list(&tlist);
666		t = SM_NTH_TRI(sm,t_id);
667		e = (T_WHICH_V(t,id)+1)%3;
668		t_opp_id = T_NTH_NBR(t,e);
669		t_opp = SM_NTH_TRI(sm,t_opp_id);
670	<
671	<	smDir(sm,p1,T_NTH_V(t_opp,0));
672	<	smDir(sm,p2,T_NTH_V(t_opp,1));
673	<	smDir(sm,p3,T_NTH_V(t_opp,2));
670	>
671	>	smDir_in_cone(sm,p1,T_NTH_V(t_opp,0));
672	>	smDir_in_cone(sm,p2,T_NTH_V(t_opp,1));
673	>	smDir_in_cone(sm,p3,T_NTH_V(t_opp,2));
674		if(point_in_cone(p,p1,p2,p3))
675		{
676		swapped = 1;
677		e1 = T_NTH_NBR_PTR(t_id,t_opp);
678		/* check list for t_opp and Remove if there */
679		remove_from_list(t_opp_id,&tlist);
680	<
681	<	smTris_swap_edge(sm,t_id,t_opp_id,e,e1,&t_id,&t_opp_id);
680	>	smTris_swap_edge(sm,t_id,t_opp_id,e,e1,&t_id,&t_opp_id,
681	>	&add_list,delptr);
682		tlist = push_data(tlist,t_id);
683		tlist = push_data(tlist,t_opp_id);
684		}
685		}
686	+	smUpdate_locator(sm,add_list,qtqueryset(*delptr));
687		return(swapped);
688		}
689
#	Line 553 | Line 697 | TRI *t;
697		int id;
698		{
699		int t_id;
700	<	int tri;
700	>	int nbr_id;
701
702		/* Want the edge for which "id" is the destination */
703		t_id = (T_WHICH_V(t,id)+ 2)% 3;
704	<	tri = T_NTH_NBR(t,t_id);
705	<	return(tri);
704	>	nbr_id = T_NTH_NBR(t,t_id);
705	>	return(nbr_id);
706		}
707
564	–	void
565	–	smReplace_point(sm,tri,id,nid)
566	–	SM *sm;
567	–	TRI *tri;
568	–	int id,nid;
569	–	{
570	–	TRI *t;
571	–	int t_id;
572	–
573	–	T_NTH_V(tri,T_WHICH_V(tri,id)) = nid;
574	–
575	–	t_id = smTri_next_ccw_nbr(sm,t,nid);
576	–	while((t= SM_NTH_TRI(sm,t_id)) != tri)
577	–	{
578	–	T_NTH_V(t,T_WHICH_V(t,id)) = nid;
579	–	t_id = smTri_next_ccw_nbr(sm,t,nid);
580	–	}
581	–	}
582	–
583	–
708		smClear_tri_flags(sm,id)
709		SM *sm;
710		int id;
#	Line 588 | Line 712 | int id;
712		int i;
713
714		for(i=0; i < T_FLAGS; i++)
715	<	SM_CLEAR_NTH_T_FLAG(sm,id,i);
715	>	SM_CLR_NTH_T_FLAG(sm,id,i);
716
717		}
718
719		/* Locate the point-id in the point location structure: */
720		int
721	<	smReplace_vertex(sm,c,dir,p,tri_id,snew_id,type,which)
721	>	smInsert_samp(sm,s_id,tri_id)
722		SM *sm;
599	–	COLR c;
600	–	FVECT dir,p;
601	–	int tri_id,snew_id;
602	–	char type,which;
603	–	{
604	–	int n_id,s_id;
605	–	TRI *tri;
606	–
607	–	tri = SM_NTH_TRI(sm,tri_id);
608	–	/* Get the sample that corresponds to the "which" vertex of "tri" */
609	–	/* NEED: have re-init that sets clock flag */
610	–	/* If this is a base-sample: create a new sample and replace
611	–	all references to the base sample with references to the
612	–	new sample
613	–	*/
614	–	s_id = T_NTH_V(tri,which);
615	–	if(SM_BASE_ID(sm,s_id))
616	–	{
617	–	if(snew_id != -1)
618	–	n_id = smAdd_sample_point(sm,c,dir,p);
619	–	else
620	–	n_id = snew_id;
621	–	smReplace_point(sm,tri,s_id,n_id);
622	–	s_id = n_id;
623	–	}
624	–	else /* If the sample exists, reset the values */
625	–	/* NOTE: This test was based on the SPHERICAL coordinates
626	–	of the point: If we are doing a multiple-sample-per
627	–	SPHERICAL pixel: we will want to test for equality-
628	–	and do other processing: for now: SINGLE SAMPLE PER
629	–	PIXEL
630	–	*/
631	–	/* NOTE: snew_id needs to be marked as invalid?*/
632	–	if(snew_id == -1)
633	–	smInit_sample(sm,s_id,c,dir,p);
634	–	else
635	–	smReset_sample(sm,s_id,snew_id);
636	–	return(s_id);
637	–	}
638	–
639	–
640	–	/* Locate the point-id in the point location structure: */
641	–	int
642	–	smInsert_point_in_tri(sm,c,dir,p,s_id,tri_id)
643	–	SM *sm;
644	–	COLR c;
645	–	FVECT dir,p;
723		int s_id,tri_id;
724		{
725	<	TRI *tri,*t0,*t1,*t2,*nbr;
726	<	int v0_id,v1_id,v2_id,n_id;
727	<	int t0_id,t1_id,t2_id;
728	<	LIST *tlist;
725	>	int v0_id,v1_id,v2_id;
726	>	int t0_id,t1_id,t2_id,replaced;
727	>	LIST *tlist,*add_list;
728	>	OBJECT del_set[2];
729	>	QUADTREE delnode;
730		FVECT npt;
731	+	TRI *tri,*nbr;
732
733	<	if(s_id == SM_INVALID)
734	<	s_id = smAdd_sample_point(sm,c,dir,p);
733	>	add_list = NULL;
734	>
735	>	v0_id = T_NTH_V(SM_NTH_TRI(sm,tri_id),0);
736	>	v1_id = T_NTH_V(SM_NTH_TRI(sm,tri_id),1);
737	>	v2_id = T_NTH_V(SM_NTH_TRI(sm,tri_id),2);
738	>
739	>	t0_id = smAdd_tri(sm,s_id,v0_id,v1_id);
740	>	/* Add triangle to the locator */
741
742	+	add_list = push_data(add_list,t0_id);
743	+
744	+	t1_id = smAdd_tri(sm,s_id,v1_id,v2_id);
745	+	add_list = push_data(add_list,t1_id);
746	+
747	+	t2_id = smAdd_tri(sm,s_id,v2_id,v0_id);
748	+	add_list = push_data(add_list,t2_id);
749	+
750	+	/* CAUTION: tri must be assigned after Add_tri: pointers may change*/
751		tri = SM_NTH_TRI(sm,tri_id);
658	–	v0_id = T_NTH_V(tri,0);
659	–	v1_id = T_NTH_V(tri,1);
660	–	v2_id = T_NTH_V(tri,2);
752
662	–	n_id = -1;
663	–	if(SM_BASE_ID(sm,v0_id)||SM_BASE_ID(sm,v1_id)||SM_BASE_ID(sm,v2_id))
664	–	{
665	–	smDir(sm,npt,s_id);
666	–	/* Change to an add and delete */
667	–	t0_id = (SM_BASE_ID(sm,v0_id))?v0_id:-1;
668	–	t1_id = (SM_BASE_ID(sm,v1_id))?v1_id:-1;
669	–	t2_id = (SM_BASE_ID(sm,v2_id))?v2_id:-1;
670	–	n_id = smClosest_vertex_in_tri(sm,t0_id,t1_id,t2_id,npt,P_REPLACE_EPS);
671	–	}
672	–	t0_id = smAdd_tri(sm,s_id,v0_id,v1_id,&t0);
673	–	t1_id = smAdd_tri(sm,s_id,v1_id,v2_id,&t1);
674	–	t2_id = smAdd_tri(sm,s_id,v2_id,v0_id,&t2);
675	–
753		/* Set the neighbor pointers for the new tris */
754	<	T_NTH_NBR(t0,0) = t2_id;
755	<	T_NTH_NBR(t0,1) = T_NTH_NBR(tri,0);
756	<	T_NTH_NBR(t0,2) = t1_id;
757	<	T_NTH_NBR(t1,0) = t0_id;
758	<	T_NTH_NBR(t1,1) = T_NTH_NBR(tri,1);
759	<	T_NTH_NBR(t1,2) = t2_id;
760	<	T_NTH_NBR(t2,0) = t1_id;
761	<	T_NTH_NBR(t2,1) = T_NTH_NBR(tri,2);
762	<	T_NTH_NBR(t2,2) = t0_id;
754	>	T_NTH_NBR(SM_NTH_TRI(sm,t0_id),0) = t2_id;
755	>	T_NTH_NBR(SM_NTH_TRI(sm,t0_id),1) = T_NTH_NBR(tri,0);
756	>	T_NTH_NBR(SM_NTH_TRI(sm,t0_id),2) = t1_id;
757	>	T_NTH_NBR(SM_NTH_TRI(sm,t1_id),0) = t0_id;
758	>	T_NTH_NBR(SM_NTH_TRI(sm,t1_id),1) = T_NTH_NBR(tri,1);
759	>	T_NTH_NBR(SM_NTH_TRI(sm,t1_id),2) = t2_id;
760	>	T_NTH_NBR(SM_NTH_TRI(sm,t2_id),0) = t1_id;
761	>	T_NTH_NBR(SM_NTH_TRI(sm,t2_id),1) = T_NTH_NBR(tri,2);
762	>	T_NTH_NBR(SM_NTH_TRI(sm,t2_id),2) = t0_id;
763
764		/* Reset the neigbor pointers for the neighbors of the original */
765		nbr = SM_NTH_TRI(sm,T_NTH_NBR(tri,0));
#	Line 692 | Line 769 | smInsert_point_in_tri(sm,c,dir,p,s_id,tri_id)
769		nbr = SM_NTH_TRI(sm,T_NTH_NBR(tri,2));
770		T_NTH_NBR(nbr,T_NTH_NBR_PTR(tri_id,nbr)) = t2_id;
771
772	<	smDelete_tri(sm,tri_id);
773	<
772	>	del_set[0] = 1; del_set[1] = tri_id;
773	>	delnode = qtnewleaf(del_set);
774	>
775		/* Fix up the new triangles*/
776		tlist = push_data(NULL,t0_id);
777		tlist = push_data(tlist,t1_id);
778		tlist = push_data(tlist,t2_id);
779
780	<	smFix_tris(sm,s_id,tlist);
780	>	smFix_tris(sm,s_id,tlist,add_list,&delnode);
781
782	<	if(n_id != -1)
705	<	smDelete_point(sm,n_id);
782	>	qtfreeleaf(delnode);
783
784	<	return(s_id);
784	>	return(TRUE);
785		}
786
787
788		int
789	<	smPointLocate(sm,pt,type,which,norm)
789	>	smTri_in_set(sm,p,optr)
790		SM *sm;
791	<	FVECT pt;
792	<	char *type,*which;
716	<	char norm;
791	>	FVECT p;
792	>	OBJECT *optr;
793		{
794	<	STREE *st;
795	<	int tri;
796	<	FVECT npt;
794	>	int i,t_id;
795	>	FVECT n,v0,v1,v2;
796	>	TRI *t;
797
798	<	st = SM_LOCATOR(sm);
723	<	if(norm)
798	>	for (i = QT_SET_CNT(optr),optr = QT_SET_PTR(optr);i > 0; i--)
799		{
800	<	point_on_sphere(npt,pt,SM_VIEW_CENTER(sm));
801	<	tri = stPoint_locate(st,npt,type,which);
800	>	/* Find the first triangle that pt falls */
801	>	t_id = QT_SET_NEXT_ELEM(optr);
802	>	t = SM_NTH_TRI(sm,t_id);
803	>	if(!T_IS_VALID(t))
804	>	continue;
805	>	VSUB(v0,SM_T_NTH_WV(sm,t,0),SM_VIEW_CENTER(sm));
806	>	VSUB(v1,SM_T_NTH_WV(sm,t,1),SM_VIEW_CENTER(sm));
807	>	VSUB(v2,SM_T_NTH_WV(sm,t,2),SM_VIEW_CENTER(sm));
808	>
809	>	if(EQUAL_VEC3(v0,p) || EQUAL_VEC3(v1,p) || EQUAL_VEC3(v2,p))
810	>	return(t_id);
811	>
812	>	VCROSS(n,v1,v0);
813	>	if(DOT(n,p) >0.0)
814	>	continue;
815	>	VCROSS(n,v2,v1);
816	>	if(DOT(n,p) > 0.0)
817	>	continue;
818	>
819	>	VCROSS(n,v0,v2);
820	>	if(DOT(n,p) > 0.0)
821	>	continue;
822	>
823	>	return(t_id);
824		}
825	<	else
729	<	tri = stPoint_locate(st,pt,type,which);
730	<	return(tri);
825	>	return(INVALID);
826		}
827
828	<	QUADTREE
829	<	smPointLocateCell(sm,pt,v0,v1,v2,type,which,norm)
828	>	int
829	>	smPointLocateTri(sm,id)
830		SM *sm;
831	<	FVECT pt,v0,v1,v2;
737	<	char *type,*which;
738	<	char norm;
831	>	int id;
832		{
833	<	STREE *st;
834	<	QUADTREE qt;
835	<	FVECT npt;
833	>	FVECT tpt;
834	>	QUADTREE qt,*optr;
835	>
836	>	VSUB(tpt,SM_NTH_WV(sm,id),SM_VIEW_CENTER(sm));
837	>	qt = smPointLocateCell(sm,tpt);
838	>	if(QT_IS_EMPTY(qt))
839	>	return(INVALID);
840	>
841	>	optr = qtqueryset(qt);
842	>	return(smTri_in_set(sm,tpt,optr));
843	>	}
844
845	<	st = SM_LOCATOR(sm);
846	<	if(norm)
845	>
846	>	/*
847	>	Determine whether this sample should:
848	>	a) be added to the mesh by subdividing the triangle
849	>	b) ignored
850	>	c) replace values of an existing mesh vertex
851	>
852	>	In case a, the routine will return TRUE, for b,c will return FALSE
853	>	In case a, also determine if this sample should cause the deletion of
854	>	an existing vertex. If so *rptr will contain the id of the sample to delete
855	>	after the new sample has been added.
856	>
857	>	ASSUMPTION: this will not be called with a new sample that is
858	>	a BASE point.
859	>
860	>	The following tests are performed (in order) to determine the fate
861	>	of the sample:
862	>
863	>	1) If the world space point of the sample coincides with one of the
864	>	triangle vertex samples: The values of the triangle sample are
865	>	replaced with the new values and FALSE is returned
866	>	2) If the new sample is close in ws, and close in the spherical projection
867	>	to one of the triangle vertex samples:
868	>	pick the point with dir closest to that of the canonical view
869	>	If it is the new point: mark existing point for deletion,and return
870	>	TRUE,else return FALSE
871	>	3) If the spherical projection of new is < REPLACE_EPS from a base point:
872	>	add new and mark the base for deletion: return TRUE
873	>	4) If the addition of the new sample point would introduce a "puncture"
874	>	or cause new triangles with large depth differences:return FALSE
875	>	This attempts to throw out points that should be occluded
876	>	*/
877	>	int
878	>	smTest_sample(sm,tri_id,s_id,dir,rptr)
879	>	SM *sm;
880	>	int tri_id,s_id;
881	>	FVECT dir;
882	>	int *rptr;
883	>	{
884	>	TRI *tri;
885	>	double d,d2,dnear,dspt,d01,d12,d20,s0,s1,s2,ds,dv;
886	>	int vid[3],i,nearid,norm,dcnt,bcnt;
887	>	FVECT diff[3],spt,npt;
888	>	FVECT p;
889	>
890	>	VCOPY(p,SM_NTH_WV(sm,s_id));
891	>	*rptr = INVALID;
892	>	bcnt = dcnt = 0;
893	>	tri = SM_NTH_TRI(sm,tri_id);
894	>	vid[0] = T_NTH_V(tri,0);
895	>	vid[1] = T_NTH_V(tri,1);
896	>	vid[2] = T_NTH_V(tri,2);
897	>
898	>	/* TEST 1: Test if the new point has the same world space point as
899	>	one of the existing triangle vertices
900	>	*/
901	>	for(i=0; i<3; i++)
902	>	{
903	>	if(SM_BASE_ID(sm,vid[i]))
904	>	{
905	>	bcnt++;
906	>	continue;
907	>	}
908	>	if(SM_DIR_ID(sm,vid[i]))
909	>	dcnt++;
910	>	VSUB(diff[i],SM_NTH_WV(sm,vid[i]),p);
911	>	/* If same world point: replace */
912	>	if(ZERO_VEC3(diff[i]))
913	>	{
914	>	sReset_samp(SM_SAMP(sm),vid[i],s_id);
915	>	SM_TONE_MAP(sm) = 0;
916	>	return(FALSE);
917	>	}
918	>	}
919	>	if(SM_DIR_ID(sm,s_id))
920	>	return(TRUE);
921	>	/* TEST 2: If the new sample is close in ws, and close in the spherical
922	>	projection to one of the triangle vertex samples
923	>	*/
924	>	norm = FALSE;
925	>	if(bcnt + dcnt != 3)
926	>	{
927	>	VSUB(spt,p,SM_VIEW_CENTER(sm));
928	>	ds = DOT(spt,spt);
929	>	dnear = FHUGE;
930	>	for(i=0; i<3; i++)
931	>	{
932	>	if(SM_BASE_ID(sm,vid[i]) || SM_DIR_ID(sm,vid[i]))
933	>	continue;
934	>	d = DOT(diff[i],diff[i])/ds;
935	>	if(d < dnear)
936	>	{
937	>	dnear = d;
938	>	nearid=vid[i];
939	>	}
940	>	}
941	>
942	>	if(dnear <=  smMinSampDiff*smMinSampDiff)
943	>	{
944	>	/* Pick the point with dir closest to that of the canonical view
945	>	if it is the new sample: mark existing point for deletion
946	>	*/
947	>	normalize(spt);
948	>	norm = TRUE;
949	>	VSUB(npt,SM_NTH_WV(sm,nearid),SM_VIEW_CENTER(sm));
950	>	normalize(npt);
951	>	d = fdir2diff(SM_NTH_W_DIR(sm,nearid), npt);
952	>	if(dir)
953	>	d2 = 2. - 2.*DOT(dir,spt);
954	>	else
955	>	d2 = fdir2diff(SM_NTH_W_DIR(sm,s_id), spt);
956	>	/* The existing sample is a better sample:punt */
957	>	if(d2 > d)
958	>	return(FALSE);
959	>	else
960	>	{
961	>	/* The new sample is better: mark the existing one
962	>	for deletion after the new one is added*/
963	>	*rptr = nearid;
964	>	return(TRUE);
965	>	}
966	>	}
967	>	}
968	>	/* TEST 3: If the spherical projection of new is < S_REPLACE_EPS
969	>	from a base point
970	>	*/
971	>	if(bcnt)
972	>	{
973	>	dnear = FHUGE;
974	>	if(bcnt + dcnt ==3)
975	>	VSUB(spt,p,SM_VIEW_CENTER(sm));
976	>	if(!norm)
977	>	normalize(spt);
978	>
979	>	for(i=0; i<3; i++)
980	>	{
981	>	if(!SM_BASE_ID(sm,vid[i]))
982	>	continue;
983	>	VSUB(npt,SM_NTH_WV(sm,vid[i]),SM_VIEW_CENTER(sm));
984	>	d = DIST_SQ(npt,spt);
985	>	if(d < S_REPLACE_EPS && d < dnear)
986	>	{
987	>	dnear = d;
988	>	nearid = vid[i];
989	>	}
990	>	}
991	>	if(dnear != FHUGE)
992	>	{
993	>	/* add new and mark the base for deletion */
994	>	*rptr = nearid;
995	>	return(TRUE);
996	>	}
997	>	}
998	>
999	>	/* TEST 4:
1000	>	If the addition of the new sample point would introduce a "puncture"
1001	>	or cause new triangles with large depth differences:dont add:
1002	>	*/
1003	>	if(bcnt || dcnt)
1004	>	return(TRUE);
1005	>	/* If the new point is in front of the existing points- add */
1006	>	dv = DIST_SQ(SM_NTH_WV(sm,vid[0]),SM_VIEW_CENTER(sm));
1007	>	if(ds < dv)
1008	>	return(TRUE);
1009	>
1010	>	d01 = DIST_SQ(SM_NTH_WV(sm,vid[1]),SM_NTH_WV(sm,vid[0]));
1011	>	s0 = DOT(diff[0],diff[0]);
1012	>	if(s0 < S_REPLACE_SCALE*d01)
1013	>	return(TRUE);
1014	>	d12 = DIST_SQ(SM_NTH_WV(sm,vid[2]),SM_NTH_WV(sm,vid[1]));
1015	>	if(s0 < S_REPLACE_SCALE*d12)
1016	>	return(TRUE);
1017	>	d20 = DIST_SQ(SM_NTH_WV(sm,vid[0]),SM_NTH_WV(sm,vid[2]));
1018	>	if(s0 < S_REPLACE_SCALE*d20)
1019	>	return(TRUE);
1020	>	d = MIN3(d01,d12,d20);
1021	>	s1 = DOT(diff[1],diff[1]);
1022	>	if(s1 < S_REPLACE_SCALE*d)
1023	>	return(TRUE);
1024	>	s2 = DOT(diff[2],diff[2]);
1025	>	if(s2 < S_REPLACE_SCALE*d)
1026	>	return(TRUE);
1027	>
1028	>
1029	>	return(FALSE);
1030	>	}
1031	>
1032	>
1033	>	int
1034	>	smAlloc_samp(sm,c,dir,pt)
1035	>	SM *sm;
1036	>	COLR c;
1037	>	FVECT dir,pt;
1038	>	{
1039	>	int s_id,replaced,cnt;
1040	>	SAMP *s;
1041	>	FVECT p;
1042	>
1043	>	s = SM_SAMP(sm);
1044	>	s_id = sAlloc_samp(s,&replaced);
1045	>
1046	>	cnt=0;
1047	>	while(replaced)
1048		{
1049	<	point_on_sphere(npt,pt,SM_VIEW_CENTER(sm));
1050	<
1051	<	qt = stPoint_locate_cell(st,npt,v0,v1,v2,type,which);
1049	>	if(smMesh_remove_vertex(sm,s_id))
1050	>	break;
1051	>	s_id = sAlloc_samp(s,&replaced);
1052	>	cnt++;
1053	>	if(cnt > S_MAX_SAMP(s))
1054	>	error(CONSISTENCY,"smAlloc_samp():unable to find free samp\n");
1055		}
1056	+
1057	+	if(pt)
1058	+	sInit_samp(s,s_id,c,dir,pt);
1059		else
1060	<	qt = stPoint_locate_cell(st,pt,v0,v1,v2,type,which);
1061	<
1062	<	return(qt);
1060	>	{
1061	>	VADD(p,dir,SM_VIEW_CENTER(sm));
1062	>	sInit_samp(s,s_id,c,NULL,p);
1063	>	}
1064	>	return(s_id);
1065		}
1066
1067		int
1068	<	smAdd_sample_to_mesh(sm,c,dir,pt,s_id)
1068	>	smAdd_samp(sm,s_id,p,dir)
1069		SM *sm;
760	–	COLR c;
761	–	FVECT dir,pt;
1070		int s_id;
1071	+	FVECT p,dir;
1072		{
1073	<	int t_id;
765	<	char type,which;
1073	>	int t_id,r_id,test;
1074		double d;
1075	<	FVECT p;
1076	<
1077	<	/* If new, foreground pt */
1078	<	if(pt)
1075	>
1076	>	r_id = INVALID;
1077	>	t_id = smPointLocateTri(sm,s_id);
1078	>	if(t_id == INVALID)
1079		{
772	–	/* NOTE: This should be elsewhere! */
773	–	d = DIST(pt,SM_VIEW_CENTER(smMesh));
774	–	smDist_sum += 1.0/d;
775	–	/************************************/
776	–	t_id = smPointLocate(smMesh,pt,&type,&which,TRUE);
777	–	if(type==GT_FACE)
778	–	s_id = smInsert_point_in_tri(smMesh,c,dir,pt,s_id,t_id);
779	–	else
780	–	if(type==GT_VERTEX)
781	–	s_id = smReplace_vertex(smMesh,c,dir,pt,t_id,s_id,type,which);
1080		#ifdef DEBUG
1081	<	else
784	<	eputs("smAdd_sample_to_mesh(): unrecognized type\n");
1081	>	eputs("smAdd_samp(): tri not found \n");
1082		#endif
1083	+	return(FALSE);
1084		}
1085	<	else if(s_id != -1)
1085	>	if(!SM_BASE_ID(sm,s_id))
1086		{
1087	<	VCOPY(p,SM_NTH_WV(sm,s_id));
1088	<	if(SM_NTH_W_DIR(sm,s_id) != -1)
1089	<	{
1090	<	/* NOTE: This should be elsewhere! */
1091	<	d = DIST(p,SM_VIEW_CENTER(smMesh));
1092	<	smDist_sum += 1.0/d;
1093	<	/************************************/
1094	<	}
797	<	t_id = smPointLocate(smMesh,p,&type,&which,TRUE);
798	<	if(type==GT_FACE)
799	<	s_id = smInsert_point_in_tri(smMesh,c,dir,p,s_id,t_id);
800	<	else
801	<	if(type==GT_VERTEX)
802	<	s_id = smReplace_vertex(smMesh,c,dir,p,t_id,s_id,type,which);
803	<	#ifdef DEBUG
804	<	else
805	<	eputs("smAdd_sample_to_mesh(): unrecognized type\n");
806	<	#endif
1087	>	if(!smTest_sample(sm,t_id,s_id,dir,&r_id))
1088	>	return(FALSE);
1089	>	/* If not a sky point, add distance from the viewcenter to average*/
1090	>	if( !SM_DIR_ID(sm,s_id))
1091	>	{
1092	>	d = DIST(p,SM_VIEW_CENTER(smMesh));
1093	>	smDist_sum += 1.0/d;
1094	>	}
1095		}
1096	<	/* Is a BG(sky point) */
1097	<	else
1098	<	{
1099	<	t_id = smPointLocate(smMesh,dir,&type,&which,FALSE);
1100	<	if(type==GT_FACE)
1101	<	s_id = smInsert_point_in_tri(smMesh,c,dir,NULL,s_id,t_id);
814	<	else
815	<	if(type==GT_VERTEX)
816	<	s_id = smReplace_vertex(smMesh,c,dir,NULL,t_id,s_id,type,which);
817	<	#ifdef DEBUG
818	<	else
819	<	eputs("smAdd_sample_to_mesh(): unrecognized type\n");
820	<	#endif
821	<	}
822	<	return(s_id);
1096	>	test = smInsert_samp(smMesh,s_id,t_id);
1097	>
1098	>	if(test && r_id != INVALID)
1099	>	smMesh_remove_vertex(sm,r_id);
1100	>
1101	>	return(test);
1102		}
1103
1104		/*
#	Line 841 | Line 1120 | FVECT p;
1120
1121		{
1122		int s_id;
1123	<
1123	>	int debug=0;
1124	>	static FILE *fp;
1125	>	static int cnt=0,n=3010;
1126		/* First check if this the first sample: if so initialize mesh */
1127		if(SM_NUM_SAMP(smMesh) == 0)
1128	<	#ifdef TEST_DRIVER
1129	<	smInit_mesh(smMesh,View.vp);
1130	<	#else
1131	<	smInit_mesh(smMesh,odev.v.vp);
1128	>	{
1129	>	smInit_sm(smMesh,odev.v.vp);
1130	>	#if 0
1131	>	fp = fopen("Debug_data.view","w");
1132	>	fprintf(fp,"%d %d %f %f %f ",1280,1024,odev.v.vp[0],odev.v.vp[1],
1133	>	odev.v.vp[2]);
1134	>	fprintf(fp,"%f %f %f ",odev.v.vdir[0],odev.v.vdir[1],
1135	>	odev.v.vdir[2]);
1136	>	fprintf(fp,"%f %f %f ",odev.v.vup[0],odev.v.vup[1],odev.v.vup[2]);
1137	>	fprintf(fp,"%f %f ",odev.v.horiz,odev.v.vert);
1138	>	fclose(fp);
1139	>	fp = fopen("Debug_data","w");
1140		#endif
1141	<	s_id = smAdd_sample_to_mesh(smMesh,c,dir,p,-1);
1141	>	}
1142		#if 0
1143	<	{
1144	<	char buff[100];
856	<	sprintf(buff,"Added sample %d\n",s_id);
857	<	eputs(buff);
858	<	}
1143	>	fprintf(fp,"%f %f %f %f %f %f ",p[0],p[1],p[2],(float)c[0]/255.0,(float)c[1]/255.0,
1144	>	(float)c[2]/255.0);
1145		#endif
1146	+
1147	+	/* Allocate space for a sample */
1148	+	s_id = smAlloc_samp(smMesh,c,dir,p);
1149	+	#if 0
1150	+	if(cnt==n)
1151	+	return(-1);
1152	+	cnt++;
1153	+	#endif
1154	+	/* Add the sample to the mesh */
1155	+	if(!smAdd_samp(smMesh,s_id,p,dir))
1156	+	{
1157	+	/* If the sample space was not used: return */
1158	+	smUnalloc_samp(smMesh,s_id);
1159	+	s_id = INVALID;
1160	+	}
1161		return(s_id);
1162
1163		}
863	–	/*
864	–	* int
865	–	* smFindsamp(orig, dir): intersect ray with 3D rep. and find closest sample
866	–	* FVECT        orig, dir;
867	–	*
868	–	* Find the closest sample to the given ray.  Return -1 on failure.
869	–	*/
870	–
871	–	/*
872	–	* smClean()            : display has been wiped clean
873	–	*
874	–	* Called after display has been effectively cleared, meaning that all
875	–	* geometry must be resent down the pipeline in the next call to smUpdate().
876	–	*/
877	–
878	–
879	–	/*
880	–	* smUpdate(vp, qua)    : update OpenGL output geometry for view vp
881	–	* VIEW *vp;            : desired view
882	–	* int  qua;            : quality level (percentage on linear time scale)
883	–	*
884	–	* Draw new geometric representation using OpenGL calls.  Assume that the
885	–	* view has already been set up and the correct frame buffer has been
886	–	* selected for drawing.  The quality level is on a linear scale, where 100%
887	–	* is full (final) quality.  It is not necessary to redraw geometry that has
888	–	* been output since the last call to smClean().
889	–	*/
890	–
891	–
1164		int
1165	<	smClear_vert(sm,id)
894	<	SM *sm;
895	<	int id;
896	<	{
897	<	if(SM_INVALID_POINT_ID(sm,id))
898	<	return(FALSE);
899	<
900	<	SM_NTH_VERT(sm,id) = SM_INVALID;
901	<
902	<	return(TRUE);
903	<	}
904	<
905	<	int
906	<	smAdd_base_vertex(sm,v,d)
1165	>	smAdd_base_vertex(sm,v)
1166		SM *sm;
1167	<	FVECT v,d;
1167	>	FVECT v;
1168		{
1169		int id;
1170
1171		/* First add coordinate to the sample array */
1172	<	id = smAdd_aux_point(sm,v,d);
1173	<	if(id == -1)
1174	<	return(SM_INVALID);
1172	>	id = sAdd_base_point(SM_SAMP(sm),v);
1173	>	if(id == INVALID)
1174	>	return(INVALID);
1175		/* Initialize triangle pointer to -1 */
1176		smClear_vert(sm,id);
1177		return(id);
#	Line 930 | Line 1189 | smCreate_base_mesh(sm,type)
1189		SM *sm;
1190		int type;
1191		{
1192	<	int i,id;
1192	>	int i,s_id,tri_id,nbr_id;
1193		int p[4],ids[4];
1194		int v0_id,v1_id,v2_id;
1195	<	TRI *tris[4];
937	<	FVECT d,pt,cntr;
1195	>	FVECT d,pt,cntr,v0,v1,v2;
1196
1197		/* First insert the base vertices into the sample point array */
1198
1199		for(i=0; i < 4; i++)
1200		{
1201	<	VADD(cntr,stDefault_base[i],SM_VIEW_CENTER(sm));
1202	<	point_on_sphere(d,cntr,SM_VIEW_CENTER(sm));
1203	<	id = smAdd_base_vertex(sm,cntr,d);
1204	<	/* test to make sure vertex allocated */
1205	<	if(id != -1)
1206	<	p[i] = id;
949	<	else
950	<	return(0);
1201	>	VCOPY(cntr,smDefault_base[i]);
1202	>	cntr[0] += .01;
1203	>	cntr[1] += .02;
1204	>	cntr[2] += .03;
1205	>	VADD(cntr,cntr,SM_VIEW_CENTER(sm));
1206	>	p[i]  = smAdd_base_vertex(sm,cntr);
1207		}
1208		/* Create the base triangles */
1209		for(i=0;i < 4; i++)
1210		{
1211	<	v0_id = p[stTri_verts[i][0]];
1212	<	v1_id = p[stTri_verts[i][1]];
1213	<	v2_id = p[stTri_verts[i][2]];
1214	<	if((ids[i] = smAdd_tri(sm, v0_id,v1_id,v2_id,&(tris[i])))== -1)
1215	<	return(0);
1211	>	v0_id = p[smTri_verts[i][0]];
1212	>	v1_id = p[smTri_verts[i][1]];
1213	>	v2_id = p[smTri_verts[i][2]];
1214	>	ids[i] = smAdd_tri(sm, v0_id,v1_id,v2_id);
1215	>	smLocator_add_tri(sm,ids[i],v0_id,v1_id,v2_id,NULL);
1216		}
1217	+
1218		/* Set neighbors */
1219
1220	<	T_NTH_NBR(tris[0],0) = ids[3];
1221	<	T_NTH_NBR(tris[0],1) = ids[2];
1222	<	T_NTH_NBR(tris[0],2) = ids[1];
1220	>	for(tri_id=0;tri_id < 4; tri_id++)
1221	>	for(nbr_id=0; nbr_id < 3; nbr_id++)
1222	>	T_NTH_NBR(SM_NTH_TRI(sm,ids[tri_id]),nbr_id) = smBase_nbrs[tri_id][nbr_id];
1223
1224	<	T_NTH_NBR(tris[1],0) = ids[3];
1225	<	T_NTH_NBR(tris[1],1) = ids[0];
1226	<	T_NTH_NBR(tris[1],2) = ids[2];
1224	>
1225	>	/* Now add the centroids of the faces */
1226	>	for(tri_id=0;tri_id < 4; tri_id++)
1227	>	{
1228	>	VCOPY(v0,SM_T_NTH_WV(sm,SM_NTH_TRI(sm,ids[tri_id]),0));
1229	>	VCOPY(v1,SM_T_NTH_WV(sm,SM_NTH_TRI(sm,ids[tri_id]),1));
1230	>	VCOPY(v2,SM_T_NTH_WV(sm,SM_NTH_TRI(sm,ids[tri_id]),2));
1231	>	tri_centroid(v0,v1,v2,cntr);
1232	>	VSUB(cntr,cntr,SM_VIEW_CENTER(sm));
1233	>	normalize(cntr);
1234	>	VADD(cntr,cntr,SM_VIEW_CENTER(sm));
1235	>	s_id = smAdd_base_vertex(sm,cntr);
1236	>	smAdd_samp(sm,s_id,NULL,NULL);
1237	>	}
1238	>	return(1);
1239
971	–	T_NTH_NBR(tris[2],0) = ids[3];
972	–	T_NTH_NBR(tris[2],1) = ids[1];
973	–	T_NTH_NBR(tris[2],2) = ids[0];
974	–
975	–	T_NTH_NBR(tris[3],0) = ids[1];
976	–	T_NTH_NBR(tris[3],1) = ids[2];
977	–	T_NTH_NBR(tris[3],2) = ids[0];
978	–	return(1);
979	–
1240		}
1241
1242
#	Line 984 | Line 1244 | int
1244		smNext_tri_flag_set(sm,i,which,b)
1245		SM *sm;
1246		int i,which;
1247	<	char b;
1247	>	int b;
1248		{
1249
1250	<	for(; i < SM_TRI_CNT(sm);i++)
1250	>	for(; i < SM_NUM_TRI(sm);i++)
1251		{
992	–	if(!SM_IS_NTH_T_FLAG(sm,i,which))
993	–	continue;
1252
1253	+	if(!T_IS_VALID(SM_NTH_TRI(sm,i)))
1254	+	continue;
1255	+	if(!SM_IS_NTH_T_FLAG(sm,i,which))
1256	+	continue;
1257		if(!b)
1258		break;
1259		if((b==1) && !SM_BG_TRI(sm,i))
#	Line 1010 | Line 1272 | smNext_valid_tri(sm,i)
1272		int i;
1273		{
1274
1275	<	while( i < SM_TRI_CNT(sm) && !T_IS_VALID(SM_NTH_TRI(sm,i)))
1275	>	while( i < SM_NUM_TRI(sm) && !T_IS_VALID(SM_NTH_TRI(sm,i)))
1276		i++;
1277
1278		return(i);
#	Line 1018 | Line 1280 | smNext_valid_tri(sm,i)
1280
1281
1282
1283	<	qtTri_verts_from_id(t_id,v0,v1,v2)
1283	>	qtTri_from_id(t_id,v0,v1,v2)
1284		int t_id;
1285		FVECT v0,v1,v2;
1286		{
1287		TRI *t;
1026	–	int v0_id,v1_id,v2_id;
1288
1289		t = SM_NTH_TRI(smMesh,t_id);
1290	<	v0_id = T_NTH_V(t,0);
1291	<	v1_id = T_NTH_V(t,1);
1292	<	v2_id = T_NTH_V(t,2);
1290	>	if(!T_IS_VALID(t))
1291	>	return(0);
1292	>	VSUB(v0,SM_T_NTH_WV(smMesh,t,0),SM_VIEW_CENTER(smMesh));
1293	>	VSUB(v1,SM_T_NTH_WV(smMesh,t,1),SM_VIEW_CENTER(smMesh));
1294	>	VSUB(v2,SM_T_NTH_WV(smMesh,t,2),SM_VIEW_CENTER(smMesh));
1295	>	return(1);
1296	>	}
1297
1033	–	smDir(smMesh,v0,v0_id);
1034	–	smDir(smMesh,v1,v1_id);
1035	–	smDir(smMesh,v2,v2_id);
1298
1299	<	}
1299	>	smRebuild_mesh(sm,v)
1300	>	SM *sm;
1301	>	VIEW *v;
1302	>	{
1303	>	int i,j,cnt;
1304	>	FVECT p,ov,dir;
1305	>	double d;
1306
1307	+	#ifdef DEBUG
1308	+	eputs("smRebuild_mesh(): rebuilding....");
1309	+	#endif
1310	+	/* Clear the mesh- and rebuild using the current sample array */
1311	+	/* Remember the current number of samples */
1312	+	cnt = SM_NUM_SAMP(sm);
1313	+	/* Calculate the difference between the current and new viewpoint*/
1314	+	/* Will need to subtract this off of sky points */
1315	+	VSUB(ov,v->vp,SM_VIEW_CENTER(sm));
1316	+	/* Initialize the mesh to 0 samples and the base triangles */
1317
1318	+	/* Go through all samples and add in if in the new view frustum, and
1319	+	the dir is <= 30 degrees from new view
1320	+	*/
1321	+	j=0;
1322	+	for(i=0; i < cnt; i++)
1323	+	{
1324	+	/* First check if sample visible(conservative approx: if one of tris
1325	+	attached to sample is in frustum)       */
1326	+	if(!S_IS_FLAG(i))
1327	+	continue;
1328	+
1329	+	/* Next test if direction > 30 from current direction */
1330	+	if(SM_NTH_W_DIR(sm,i)!=-1)
1331	+	{
1332	+	VSUB(p,SM_NTH_WV(sm,i),v->vp);
1333	+	normalize(p);
1334	+	d = fdir2diff(SM_NTH_W_DIR(sm,i), p);
1335	+	if (d > MAXDIFF2)
1336	+	continue;
1337	+	}
1338	+	sReset_samp(SM_SAMP(sm),j,i);
1339	+	j++;
1340	+	}
1341	+	smInit_sm(sm,v->vp);
1342	+	for(i=0; i< j; i++)
1343	+	{
1344	+	S_SET_FLAG(i);
1345	+	VCOPY(p,SM_NTH_WV(sm,i));
1346	+	smAdd_samp(sm,i,p,NULL);
1347	+	}
1348	+	SM_NUM_SAMP(sm) = j;
1349	+	smNew_tri_cnt = SM_SAMPLE_TRIS(sm);
1350	+	#ifdef DEBUG
1351	+	eputs("smRebuild_mesh():done\n");
1352	+	#endif
1353	+	}
1354	+
1355		int
1356	<	smIntersectTriSet(sm,t_set,orig,dir,pt)
1042	<	SM *sm;
1356	>	intersect_tri_set(t_set,orig,dir,pt)
1357		OBJECT *t_set;
1358		FVECT orig,dir,pt;
1359		{
1360		OBJECT *optr;
1361	<	int i,t_id,v_id;
1362	<	TRI *tri;
1363	<	FVECT p0,p1,p2;
1364	<	char type,which;
1051	<	int p0_id,p1_id,p2_id;
1361	>	int i,t_id,id;
1362	>	int pid0,pid1,pid2;
1363	>	FVECT p0,p1,p2,p;
1364	>	TRI *t;
1365
1366	<	for(optr = QT_SET_PTR(t_set),i = QT_SET_CNT(t_set); i > 0; i--)
1366	>	optr = QT_SET_PTR(t_set);
1367	>	for(i = QT_SET_CNT(t_set); i > 0; i--)
1368		{
1369		t_id = QT_SET_NEXT_ELEM(optr);
1370	<	tri = SM_NTH_TRI(sm,t_id);
1371	<	p0_id = T_NTH_V(tri,0);
1372	<	p1_id = T_NTH_V(tri,1);
1373	<	p2_id = T_NTH_V(tri,2);
1374	<	VCOPY(p0,SM_NTH_WV(sm,p0_id));
1375	<	VCOPY(p1,SM_NTH_WV(sm,p1_id));
1376	<	VCOPY(p2,SM_NTH_WV(sm,p2_id));
1377	<	if(type = ray_intersect_tri(orig,dir,p0,p1,p2,pt,&which))
1370	>
1371	>	t = SM_NTH_TRI(smMesh,t_id);
1372	>	if(!T_IS_VALID(t))
1373	>	continue;
1374	>
1375	>	pid0 = T_NTH_V(t,0);
1376	>	pid1 = T_NTH_V(t,1);
1377	>	pid2 = T_NTH_V(t,2);
1378	>	VCOPY(p0,SM_NTH_WV(smMesh,pid0));
1379	>	VCOPY(p1,SM_NTH_WV(smMesh,pid1));
1380	>	VCOPY(p2,SM_NTH_WV(smMesh,pid2));
1381	>	if(ray_intersect_tri(orig,dir,p0,p1,p2,p))
1382		{
1383	<	if(type==GT_VERTEX)
1384	<	return(T_NTH_V(tri,which));
1385	<	v_id = smClosest_vertex_in_w_tri(sm,p0_id,p1_id,p2_id,pt);
1386	<	return(v_id);
1383	>	id = closest_point_in_tri(p0,p1,p2,p,pid0,pid1,pid2);
1384	>
1385	>	if(pt)
1386	>	VCOPY(pt,p);
1387	>	#ifdef DEBUG_TEST_DRIVER
1388	>	Pick_tri = t_id;
1389	>	Pick_samp = id;
1390	>	VCOPY(Pick_point[0],p);
1391	>	#endif
1392	>	return(id);
1393		}
1394		}
1395		return(-1);
1396		}
1397
1398	<	/*
1399	<	* int
1400	<	* smTraceRay(SM *sm,FVECT orig, FVECT dir,FVECT v0,FVECT v1,FVECT v2,FVECT r)
1077	<	*
1078	<	*   Intersect the ray with triangle v0v1v2, return intersection point in r
1079	<	*
1080	<	*    Assumes orig,v0,v1,v2 are in spherical coordinates, and orig is
1081	<	*    unit
1082	<	*/
1083	<	char
1084	<	smTraceRay(sm,orig,dir,v0,v1,v2,r)
1085	<	SM *sm;
1086	<	FVECT orig,dir;
1087	<	FVECT v0,v1,v2;
1088	<	FVECT r;
1089	<	{
1090	<	FVECT n,p[3],d;
1091	<	double pt[3],r_eps;
1092	<	char i;
1093	<	int which;
1398	>	/* OS is constrained to be <= QT_MAXCSET : if the set exceeds this, the
1399	>	results of check_set are conservative
1400	>	*/
1401
1402	<	/* Find the plane equation for the triangle defined by the edge v0v1 and
1403	<	the view center*/
1404	<	VCROSS(n,v0,v1);
1405	<	/* Intersect the ray with this plane */
1406	<	i = intersect_ray_plane(orig,dir,n,0.0,&(pt[0]),p[0]);
1407	<	if(i)
1408	<	which = 0;
1409	<	else
1410	<	which = -1;
1411	<
1412	<	VCROSS(n,v1,v2);
1413	<	i = intersect_ray_plane(orig,dir,n,0.0,&(pt[1]),p[1]);
1414	<	if(i)
1415	<	if((which==-1) || pt[1] < pt[0])
1416	<	which = 1;
1417	<
1418	<	VCROSS(n,v2,v0);
1419	<	i = intersect_ray_plane(orig,dir,n,0.0,&(pt[2]),p[2]);
1420	<	if(i)
1421	<	if((which==-1) || pt[2] < pt[which])
1422	<	which = 2;
1423	<
1424	<	if(which != -1)
1425	<	{
1426	<	/* Return point that is K*eps along projection of the ray on
1427	<	the sphere to push intersection point p[which] into next cell
1428	<	*/
1429	<	normalize(p[which]);
1430	<	/* Calculate the ray perpendicular to the intersection point: approx
1431	<	the direction moved along the sphere a distance of K*epsilon*/
1432	<	r_eps = -DOT(p[which],dir);
1433	<	VSUM(n,dir,p[which],r_eps);
1434	<	/* Calculate the length along ray p[which]-dir needed to move to
1435	<	cause a move along the sphere of k*epsilon
1436	<	*/
1437	<	r_eps = DOT(n,dir);
1438	<	VSUM(r,p[which],dir,(20*FTINY)/r_eps);
1439	<	normalize(r);
1440	<	return(TRUE);
1441	<	}
1442	<	else
1443	<	{
1444	<	/* Unable to find intersection: move along ray and try again */
1445	<	r_eps = -DOT(orig,dir);
1446	<	VSUM(n,dir,orig,r_eps);
1447	<	r_eps = DOT(n,dir);
1141	<	VSUM(r,orig,dir,(20*FTINY)/r_eps);
1142	<	normalize(r);
1143	<	#ifdef DEBUG
1144	<	eputs("smTraceRay:Ray does not intersect triangle");
1145	<	#endif
1146	<	return(FALSE);
1147	<	}
1402	>	ray_trace_check_set(qtptr,fptr,argptr)
1403	>	QUADTREE *qtptr;
1404	>	int *fptr;
1405	>	RT_ARGS *argptr;
1406	>	{
1407	>	OBJECT tset[QT_MAXSET+1],*tptr;
1408	>	double dt,t;
1409	>	int found;
1410	>
1411	>	if(QT_LEAF_IS_FLAG(*qtptr))
1412	>	{
1413	>	QT_FLAG_SET_DONE(*fptr);
1414	>	#if DEBUG
1415	>	eputs("ray_trace_check_set():Already visited this node:aborting\n");
1416	>	#endif
1417	>	return;
1418	>	}
1419	>	if(!QT_IS_EMPTY(*qtptr))
1420	>	{
1421	>	tptr = qtqueryset(*qtptr);
1422	>	if(QT_SET_CNT(tptr) > QT_MAXSET)
1423	>	tptr = (OBJECT *)malloc((QT_SET_CNT(tptr)+1)*sizeof(OBJECT));
1424	>	else
1425	>	tptr = tset;
1426	>	if(!tptr)
1427	>	goto memerr;
1428	>
1429	>	qtgetset(tptr,*qtptr);
1430	>	/* Check triangles in set against those seen so far(os):only
1431	>	check new triangles for intersection (t_set')
1432	>	*/
1433	>	check_set_large(tptr,argptr->os);
1434	>	if((found = intersect_tri_set(tptr,argptr->orig,argptr->dir,NULL))!= -1)
1435	>	{
1436	>	argptr->t_id = found;
1437	>	if(tptr != tset)
1438	>	free(tptr);
1439	>	QT_FLAG_SET_DONE(*fptr);
1440	>	return;
1441	>	}
1442	>	if(tptr != tset)
1443	>	free(tptr);
1444	>	}
1445	>	return;
1446	>	memerr:
1447	>	error(SYSTEM,"ray_trace_check_set():Unable to allocate memory");
1448		}
1449
1450
#	Line 1155 | Line 1455 | smTraceRay(sm,orig,dir,v0,v1,v2,r)
1455		* Find the closest sample to the given ray.  Returns sample id, -1 on failure.
1456		* "dir" is assumed to be normalized
1457		*/
1458	+
1459		int
1460		smFindSamp(orig,dir)
1461		FVECT orig,dir;
1462		{
1463	<	FVECT r,v0,v1,v2,a,b,p;
1464	<	OBJECT os[MAXCSET+1],t_set[MAXSET+1];
1463	>	FVECT b,p,o;
1464	>	OBJECT *ts;
1465		QUADTREE qt;
1466		int s_id;
1467		double d;
#	Line 1180 | Line 1481 | FVECT orig,dir;
1481		either case, do a single test against the cell containing the
1482		intersection of "dir" and the sphere
1483		*/
1484	+	/* orig will be updated-so preserve original value */
1485	+	if(!smMesh)
1486	+	return;
1487		point_on_sphere(b,orig,SM_VIEW_CENTER(smMesh));
1488		d = -DOT(b,dir);
1489		if(EQUAL_VEC3(orig,SM_VIEW_CENTER(smMesh)) || EQUAL(fabs(d),1.0))
1490		{
1491	<	qt = smPointLocateCell(smMesh,dir,v0,v1,v2,NULL,NULL,FALSE);
1491	>	qt = smPointLocateCell(smMesh,dir);
1492		/* Test triangles in the set for intersection with Ray:returns
1493		first found
1494		*/
1495	<	qtgetset(t_set,qt);
1496	<	s_id = smIntersectTriSet(smMesh,t_set,orig,dir,p);
1497	<	#ifdef TEST_DRIVER
1495	>	#ifdef DEBUG
1496	>	if(QT_IS_EMPTY(qt))
1497	>	{
1498	>	eputs("smFindSamp(): point not found");
1499	>	return;
1500	>	}
1501	>	#endif
1502	>	ts = qtqueryset(qt);
1503	>	s_id = intersect_tri_set(ts,orig,dir,p);
1504	>	#ifdef DEBUG_TEST_DRIVER
1505		VCOPY(Pick_point[0],p);
1506		#endif
1196	–	return(s_id);
1507		}
1508		else
1509		{
1510	<	/* Starting with orig, Walk along projection of ray onto sphere */
1511	<	point_on_sphere(r,orig,SM_VIEW_CENTER(smMesh));
1202	<	qt = smPointLocateCell(smMesh,r,v0,v1,v2,NULL,NULL,FALSE);
1203	<	qtgetset(t_set,qt);
1204	<	/* os will contain all triangles seen thus far */
1205	<	setcopy(os,t_set);
1510	>	OBJECT t_set[QT_MAXCSET + 1];
1511	>	RT_ARGS rt;
1512
1513	<	/* Calculate ray perpendicular to dir: when projection ray is // to dir,
1514	<	the dot product will become negative.
1515	<	*/
1516	<	VSUM(a,b,dir,d);
1517	<	d = DOT(a,b);
1518	<	while(d > 0)
1519	<	{
1520	<	s_id = smIntersectTriSet(smMesh,t_set,orig,dir,p);
1521	<	#ifdef TEST_DRIVER
1522	<	VCOPY(Pick_point[0],p);
1523	<	#endif
1524	<	if(s_id != EMPTY)
1219	<	return(s_id);
1220	<	/* Find next cell that projection of ray intersects */
1221	<	smTraceRay(smMesh,r,dir,v0,v1,v2,r);
1222	<	qt = smPointLocateCell(smMesh,r,v0,v1,v2,NULL,NULL,FALSE);
1223	<	qtgetset(t_set,qt);
1224	<	/* Check triangles in set against those seen so far(os):only
1225	<	check new triangles for intersection (t_set')
1226	<	*/
1227	<	check_set(t_set,os);
1228	<	d = DOT(a,r);
1229	<	}
1230	<	}
1231	<	#ifdef DEBUG
1232	<	eputs("smFindSamp():Pick Ray did not intersect mesh");
1233	<	#endif
1234	<	return(EMPTY);
1513	>	/* Test each of the root triangles against point id */
1514	>	QT_CLEAR_SET(t_set);
1515	>	VSUB(o,orig,SM_VIEW_CENTER(smMesh));
1516	>	ST_CLEAR_FLAGS(SM_LOCATOR(smMesh));
1517	>	rt.t_id = -1;
1518	>	rt.os = t_set;
1519	>	VCOPY(rt.orig,orig);
1520	>	VCOPY(rt.dir,dir);
1521	>	stTrace_ray(SM_LOCATOR(smMesh),o,dir,ray_trace_check_set,&rt);
1522	>	s_id = rt.t_id;
1523	>	}
1524	>	return(s_id);
1525		}
1236	–
1526
1238	–	smRebuild_mesh(sm,vptr)
1239	–	SM *sm;
1240	–	VIEW *vptr;
1241	–	{
1242	–	int i;
1243	–	FVECT dir;
1244	–	COLR c;
1245	–	FVECT p,ov;
1527
1247	–	/* Clear the mesh- and rebuild using the current sample array */
1248	–	#ifdef TEST_DRIVER
1249	–	View = *vptr;
1250	–	#endif
1528
1529	<	VSUB(ov,vptr->vp,SM_VIEW_CENTER(sm));
1530	<	smInit_mesh(sm,vptr->vp);
1531	<
1532	<	SM_FOR_ALL_SAMPLES(sm,i)
1533	<	{
1534	<	if(SM_NTH_W_DIR(sm,i)==-1)
1258	<	VADD(SM_NTH_WV(sm,i),SM_NTH_WV(sm,i),ov);
1259	<	smAdd_sample_to_mesh(sm,NULL,NULL,NULL,i);
1260	<	}
1261	<	}
1529	>
1530	>
1531	>
1532	>
1533	>
1534	>
1535
1536

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