8 |
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* sm_stree.c |
9 |
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*/ |
10 |
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#include "standard.h" |
11 |
– |
#include "object.h" |
12 |
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|
11 |
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#include "sm_geom.h" |
12 |
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#include "sm_stree.h" |
13 |
|
|
16 |
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|
14 |
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/* Define 4 vertices on the sphere to create a tetrahedralization on |
15 |
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the sphere: triangles are as follows: |
16 |
< |
(0,1,2),(0,2,3), (0,3,1), (1,3,2) |
16 |
> |
(2,1,0),(3,2,0), (1,3,0), (2,3,1) |
17 |
|
*/ |
18 |
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|
19 |
+ |
#ifdef TEST_DRIVER |
20 |
+ |
extern FVECT Pick_point[500],Pick_v0[500],Pick_v1[500],Pick_v2[500]; |
21 |
+ |
extern int Pick_cnt; |
22 |
+ |
#endif |
23 |
|
FVECT stDefault_base[4] = { {SQRT3_INV, SQRT3_INV, SQRT3_INV}, |
24 |
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{-SQRT3_INV, -SQRT3_INV, SQRT3_INV}, |
25 |
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{-SQRT3_INV, SQRT3_INV, -SQRT3_INV}, |
26 |
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{SQRT3_INV, -SQRT3_INV, -SQRT3_INV}}; |
27 |
< |
int stTri_verts[4][3] = { {2,1,0}, |
28 |
< |
{3,2,0}, |
28 |
< |
{1,3,0}, |
29 |
< |
{2,3,1}}; |
27 |
> |
int stTri_verts[4][3] = { {2,1,0},{3,2,0},{1,3,0},{2,3,1}}; |
28 |
> |
int stTri_nbrs[4][3] = { {2,1,3},{0,2,3},{1,0,3},{2,0,1}}; |
29 |
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|
30 |
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stNth_base_verts(st,i,v1,v2,v3) |
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STREE *st; |
100 |
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"which" specifies which vertex (0,1,2) or edge (0=v0v1, 1 = v1v2, 2 = v21) |
101 |
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*/ |
102 |
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int |
103 |
< |
stPoint_locate(st,npt,type,which) |
103 |
> |
stPoint_locate(st,npt) |
104 |
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STREE *st; |
105 |
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FVECT npt; |
107 |
– |
char *type,*which; |
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{ |
107 |
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int i,d,j,id; |
108 |
< |
QUADTREE *rootptr,qt; |
108 |
> |
QUADTREE *rootptr,*qtptr; |
109 |
|
FVECT v1,v2,v3; |
110 |
< |
OBJECT os[MAXSET+1],*optr; |
113 |
< |
char w; |
110 |
> |
OBJECT os[QT_MAXSET+1],*optr; |
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FVECT p0,p1,p2; |
112 |
|
|
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/* Test each of the root triangles against point id */ |
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rootptr = ST_NTH_ROOT_PTR(st,i); |
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stNth_base_verts(st,i,v1,v2,v3); |
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|
/* Return tri that p falls in */ |
119 |
< |
qt = qtRoot_point_locate(rootptr,v1,v2,v3,npt,type,which); |
120 |
< |
if(QT_IS_EMPTY(qt)) |
119 |
> |
qtptr = qtRoot_point_locate(rootptr,v1,v2,v3,npt,NULL,NULL,NULL); |
120 |
> |
if(!qtptr || QT_IS_EMPTY(*qtptr)) |
121 |
|
continue; |
122 |
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/* Get the set */ |
123 |
< |
qtgetset(os,qt); |
124 |
< |
for (j = QT_SET_CNT(os),optr = QT_SET_PTR(os); j > 0; j--) |
123 |
> |
optr = qtqueryset(*qtptr); |
124 |
> |
for (j = QT_SET_CNT(optr),optr = QT_SET_PTR(optr);j > 0; j--) |
125 |
|
{ |
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|
/* Find the first triangle that pt falls */ |
127 |
|
id = QT_SET_NEXT_ELEM(optr); |
128 |
< |
qtTri_verts_from_id(id,p0,p1,p2); |
129 |
< |
d = test_single_point_against_spherical_tri(p0,p1,p2,npt,&w); |
128 |
> |
qtTri_from_id(id,p0,p1,p2,NULL,NULL,NULL,NULL,NULL,NULL); |
129 |
> |
d = point_in_stri(p0,p1,p2,npt); |
130 |
|
if(d) |
131 |
< |
{ |
135 |
< |
if(type) |
136 |
< |
*type = d; |
137 |
< |
if(which) |
138 |
< |
*which = w; |
139 |
< |
return(id); |
140 |
< |
} |
131 |
> |
return(id); |
132 |
|
} |
133 |
|
} |
143 |
– |
if(which) |
144 |
– |
*which = 0; |
145 |
– |
if(type) |
146 |
– |
*type = 0; |
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|
return(EMPTY); |
135 |
|
} |
136 |
|
|
137 |
< |
int |
138 |
< |
stPoint_locate_cell(st,p,type,which) |
137 |
> |
QUADTREE |
138 |
> |
*stPoint_locate_cell(st,p,t0,t1,t2) |
139 |
|
STREE *st; |
140 |
|
FVECT p; |
141 |
< |
char *type,*which; |
141 |
> |
FVECT t0,t1,t2; |
142 |
|
{ |
143 |
|
int i,d; |
144 |
< |
QUADTREE *rootptr,qt; |
144 |
> |
QUADTREE *rootptr,*qtptr; |
145 |
|
FVECT v0,v1,v2; |
146 |
|
|
147 |
|
|
150 |
|
{ |
151 |
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rootptr = ST_NTH_ROOT_PTR(st,i); |
152 |
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stNth_base_verts(st,i,v0,v1,v2); |
153 |
< |
/* Return tri that p falls in */ |
154 |
< |
qt = qtRoot_point_locate(rootptr,v0,v1,v2,p,type,which); |
155 |
< |
/* NOTE: For now return only one triangle */ |
156 |
< |
if(!QT_IS_EMPTY(qt)) |
170 |
< |
return(qt); |
153 |
> |
/* Return quadtree tri that p falls in */ |
154 |
> |
qtptr = qtRoot_point_locate(rootptr,v0,v1,v2,p,t0,t1,t2); |
155 |
> |
if(qtptr) |
156 |
> |
return(qtptr); |
157 |
|
} /* Point not found */ |
158 |
< |
if(which) |
173 |
< |
*which = 0; |
174 |
< |
if(type) |
175 |
< |
*type = 0; |
176 |
< |
return(EMPTY); |
158 |
> |
return(NULL); |
159 |
|
} |
160 |
|
|
161 |
+ |
|
162 |
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int |
163 |
|
stAdd_tri(st,id,v0,v1,v2) |
164 |
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STREE *st; |
175 |
|
{ |
176 |
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rootptr = ST_NTH_ROOT_PTR(st,i); |
177 |
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stNth_base_verts(st,i,t0,t1,t2); |
178 |
< |
found |= qtAdd_tri(rootptr,id,v0,v1,v2,t0,t1,t2,0); |
178 |
> |
found |= qtRoot_add_tri(rootptr,t0,t1,t2,v0,v1,v2,id,0); |
179 |
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} |
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return(found); |
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} |
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STREE *st; |
186 |
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FVECT v0,v1,v2; |
187 |
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int (*func)(); |
188 |
< |
char *arg; |
188 |
> |
int *arg; |
189 |
|
{ |
190 |
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int i,found; |
191 |
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QUADTREE *rootptr; |
192 |
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FVECT t0,t1,t2; |
193 |
|
|
194 |
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found = 0; |
195 |
+ |
func(ST_ROOT_PTR(st),arg); |
196 |
+ |
QT_SET_FLAG(ST_ROOT(st)); |
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for(i=0; i < 4; i++) |
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{ |
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rootptr = ST_NTH_ROOT_PTR(st,i); |
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found |= qtRemove_tri(rootptr,id,v0,v1,v2,t0,t1,t2); |
226 |
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} |
227 |
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return(found); |
228 |
+ |
} |
229 |
+ |
|
230 |
+ |
int |
231 |
+ |
stVisit_tri_edges(st,t0,t1,t2,func,arg1,arg2,arg3) |
232 |
+ |
STREE *st; |
233 |
+ |
FVECT t0,t1,t2; |
234 |
+ |
int (*func)(); |
235 |
+ |
int *arg1,arg2,*arg3; |
236 |
+ |
{ |
237 |
+ |
int id,i,w; |
238 |
+ |
QUADTREE *rootptr; |
239 |
+ |
FVECT q0,q1,q2,v[3],i_pt; |
240 |
+ |
|
241 |
+ |
VCOPY(v[0],t0); VCOPY(v[1],t1); VCOPY(v[2],t2); |
242 |
+ |
w = -1; |
243 |
+ |
QT_SET_FLAG(ST_ROOT(st)); |
244 |
+ |
for(i=0; i < 4; i++) |
245 |
+ |
{ |
246 |
+ |
#ifdef TEST_DRIVER |
247 |
+ |
Pick_cnt = 0; |
248 |
+ |
#endif |
249 |
+ |
rootptr = ST_NTH_ROOT_PTR(st,i); |
250 |
+ |
stNth_base_verts(st,i,q0,q1,q2); |
251 |
+ |
/* Return quadtree tri that p falls in */ |
252 |
+ |
if(!point_in_stri(q0,q1,q2,v[0])) |
253 |
+ |
continue; |
254 |
+ |
#ifdef TEST_DRIVER |
255 |
+ |
id = qtRoot_visit_tri_edges(rootptr,q0,q1,q2,v,i_pt,&w, |
256 |
+ |
func,arg1,arg2,arg3); |
257 |
+ |
#else |
258 |
+ |
id = qtRoot_visit_tri_edgesi(rootptr,q0,q1,q2,v,i_pt,&w, |
259 |
+ |
func,arg1,arg2,arg3); |
260 |
+ |
#endif |
261 |
+ |
if(id == INVALID) |
262 |
+ |
{ |
263 |
+ |
#ifdef DEBUG |
264 |
+ |
eputs("stVisit_tri_edges(): Unable to trace edges\n"); |
265 |
+ |
#endif |
266 |
+ |
return(INVALID); |
267 |
+ |
} |
268 |
+ |
if(id == QT_DONE) |
269 |
+ |
return(*arg1); |
270 |
+ |
|
271 |
+ |
/* Crossed over to next cell: id = nbr */ |
272 |
+ |
while(1) |
273 |
+ |
{ |
274 |
+ |
/* test if ray crosses plane between this quadtree triangle and |
275 |
+ |
its neighbor- if it does then find intersection point with |
276 |
+ |
ray and plane- this is the new origin |
277 |
+ |
*/ |
278 |
+ |
i = stTri_nbrs[i][id]; |
279 |
+ |
rootptr = ST_NTH_ROOT_PTR(st,i); |
280 |
+ |
stNth_base_verts(st,i,q0,q1,q2); |
281 |
+ |
#ifdef TEST_DRIVER |
282 |
+ |
id=qtRoot_visit_tri_edges(rootptr,q0,q1,q2,v,i_pt,&w, |
283 |
+ |
func,arg1,arg2,arg3); |
284 |
+ |
#else |
285 |
+ |
id=qtRoot_visit_tri_edgesi(rootptr,q0,q1,q2,v,i_pt,&w, |
286 |
+ |
func,arg1,arg2,arg3); |
287 |
+ |
#endif |
288 |
+ |
if(id == QT_DONE) |
289 |
+ |
return(*arg1); |
290 |
+ |
if(id == INVALID) |
291 |
+ |
{ |
292 |
+ |
#ifdef DEBUG |
293 |
+ |
eputs("stVisit_tri_edges(): point not found\n"); |
294 |
+ |
#endif |
295 |
+ |
return(INVALID); |
296 |
+ |
} |
297 |
+ |
|
298 |
+ |
} |
299 |
+ |
} /* Point not found */ |
300 |
+ |
return(INVALID); |
301 |
+ |
} |
302 |
+ |
|
303 |
+ |
int |
304 |
+ |
stTrace_ray(st,orig,dir,func,arg1,arg2) |
305 |
+ |
STREE *st; |
306 |
+ |
FVECT orig,dir; |
307 |
+ |
int (*func)(); |
308 |
+ |
int *arg1,arg2; |
309 |
+ |
{ |
310 |
+ |
int id,i; |
311 |
+ |
QUADTREE *rootptr; |
312 |
+ |
FVECT q0,q1,q2,o,n; |
313 |
+ |
double pd,t; |
314 |
+ |
|
315 |
+ |
VCOPY(o,orig); |
316 |
+ |
for(i=0; i < 4; i++) |
317 |
+ |
{ |
318 |
+ |
#ifdef TEST_DRIVER |
319 |
+ |
Pick_cnt = 0; |
320 |
+ |
#endif |
321 |
+ |
rootptr = ST_NTH_ROOT_PTR(st,i); |
322 |
+ |
stNth_base_verts(st,i,q0,q1,q2); |
323 |
+ |
/* Return quadtree tri that p falls in */ |
324 |
+ |
id= qtRoot_trace_ray(rootptr,q0,q1,q2,o,dir,func,arg1,arg2); |
325 |
+ |
if(id == INVALID) |
326 |
+ |
continue; |
327 |
+ |
if(id == QT_DONE) |
328 |
+ |
return(*arg1); |
329 |
+ |
|
330 |
+ |
/* Crossed over to next cell: id = nbr */ |
331 |
+ |
while(1) |
332 |
+ |
{ |
333 |
+ |
/* test if ray crosses plane between this quadtree triangle and |
334 |
+ |
its neighbor- if it does then find intersection point with |
335 |
+ |
ray and plane- this is the new origin |
336 |
+ |
*/ |
337 |
+ |
if(id==0) |
338 |
+ |
VCROSS(n,q1,q2); |
339 |
+ |
else |
340 |
+ |
if(id==1) |
341 |
+ |
VCROSS(n,q2,q0); |
342 |
+ |
else |
343 |
+ |
VCROSS(n,q0,q1); |
344 |
+ |
|
345 |
+ |
/* Ray does not cross into next cell: done and tri not found*/ |
346 |
+ |
if(!intersect_ray_plane(orig,dir,n,0.0,NULL,o)) |
347 |
+ |
return(INVALID); |
348 |
+ |
|
349 |
+ |
VSUM(o,o,dir,10*FTINY); |
350 |
+ |
i = stTri_nbrs[i][id]; |
351 |
+ |
rootptr = ST_NTH_ROOT_PTR(st,i); |
352 |
+ |
stNth_base_verts(st,i,q0,q1,q2); |
353 |
+ |
id = qtRoot_trace_ray(rootptr,q0,q1,q2,o,dir,func,arg1,arg2); |
354 |
+ |
if(id == QT_DONE) |
355 |
+ |
return(*arg1); |
356 |
+ |
if(id == INVALID) |
357 |
+ |
return(INVALID); |
358 |
+ |
|
359 |
+ |
} |
360 |
+ |
} /* Point not found */ |
361 |
+ |
return(INVALID); |
362 |
+ |
} |
363 |
+ |
|
364 |
+ |
|
365 |
+ |
|
366 |
+ |
stVisit_tri_interior(st,t0,t1,t2,func,arg1,arg2,arg3) |
367 |
+ |
STREE *st; |
368 |
+ |
FVECT t0,t1,t2; |
369 |
+ |
int (*func)(); |
370 |
+ |
int *arg1,arg2,*arg3; |
371 |
+ |
{ |
372 |
+ |
int i; |
373 |
+ |
QUADTREE *rootptr; |
374 |
+ |
FVECT q0,q1,q2; |
375 |
+ |
|
376 |
+ |
for(i=0; i < 4; i++) |
377 |
+ |
{ |
378 |
+ |
rootptr = ST_NTH_ROOT_PTR(st,i); |
379 |
+ |
stNth_base_verts(st,i,q0,q1,q2); |
380 |
+ |
qtVisit_tri_interior(rootptr,q0,q1,q2,t0,t1,t2,0,func,arg1,arg2,arg3); |
381 |
+ |
} |
382 |
+ |
} |
383 |
+ |
|
384 |
+ |
|
385 |
+ |
int |
386 |
+ |
stApply_to_tri(st,t0,t1,t2,edge_func,interior_func,arg1,arg2) |
387 |
+ |
STREE *st; |
388 |
+ |
FVECT t0,t1,t2; |
389 |
+ |
int (*edge_func)(),(*interior_func)(); |
390 |
+ |
int arg1,*arg2; |
391 |
+ |
{ |
392 |
+ |
int f; |
393 |
+ |
FVECT dir; |
394 |
+ |
|
395 |
+ |
/* First add all of the leaf cells lying on the triangle perimeter: |
396 |
+ |
mark all cells seen on the way |
397 |
+ |
*/ |
398 |
+ |
f = 0; |
399 |
+ |
/* Visit cells along edges of the tri */ |
400 |
+ |
|
401 |
+ |
stVisit_tri_edges(st,t0,t1,t2,edge_func,&f,arg1,arg2); |
402 |
+ |
|
403 |
+ |
/* Now visit interior */ |
404 |
+ |
if(QT_FLAG_FILL_TRI(f) || QT_FLAG_UPDATE(f)) |
405 |
+ |
stVisit_tri_interior(st,t0,t1,t2,interior_func,&f,arg1,arg2); |
406 |
|
} |
407 |
|
|
408 |
|
|