39 |
|
VCROSS(cp01,v0,v1); |
40 |
|
VCROSS(cp12,v1,v2); |
41 |
|
VCROSS(cp,cp01,cp12); |
42 |
< |
if(DOT(cp,v1) < 0) |
42 |
> |
if(DOT(cp,v1) < 0.0) |
43 |
|
return(FALSE); |
44 |
|
return(TRUE); |
45 |
|
} |
53 |
|
double |
54 |
|
tri_normal(v0,v1,v2,n,norm) |
55 |
|
FVECT v0,v1,v2,n; |
56 |
< |
char norm; |
56 |
> |
int norm; |
57 |
|
{ |
58 |
|
double mag; |
59 |
|
|
83 |
|
tri_plane_equation(v0,v1,v2,n,nd,norm) |
84 |
|
FVECT v0,v1,v2,n; |
85 |
|
double *nd; |
86 |
< |
char norm; |
86 |
> |
int norm; |
87 |
|
{ |
88 |
|
tri_normal(v0,v1,v2,n,norm); |
89 |
|
|
90 |
|
*nd = -(DOT(n,v0)); |
91 |
|
} |
92 |
|
|
93 |
– |
int |
94 |
– |
point_relative_to_plane(p,n,nd) |
95 |
– |
FVECT p,n; |
96 |
– |
double nd; |
97 |
– |
{ |
98 |
– |
double d; |
99 |
– |
|
100 |
– |
d = p[0]*n[0] + p[1]*n[1] + p[2]*n[2] + nd; |
101 |
– |
if(d < 0) |
102 |
– |
return(-1); |
103 |
– |
if(ZERO(d)) |
104 |
– |
return(0); |
105 |
– |
else |
106 |
– |
return(1); |
107 |
– |
} |
108 |
– |
|
93 |
|
/* From quad_edge-code */ |
94 |
|
int |
95 |
|
point_in_circle_thru_origin(p,p0,p1) |
119 |
|
} |
120 |
|
|
121 |
|
|
122 |
+ |
/* returns TRUE if ray from origin in direction v intersects plane defined |
123 |
+ |
* by normal plane_n, and plane_d. If plane is not parallel- returns |
124 |
+ |
* intersection point if r != NULL. If tptr!= NULL returns value of |
125 |
+ |
* t, if parallel, returns t=FHUGE |
126 |
+ |
*/ |
127 |
|
int |
128 |
|
intersect_vector_plane(v,plane_n,plane_d,tptr,r) |
129 |
|
FVECT v,plane_n; |
131 |
|
double *tptr; |
132 |
|
FVECT r; |
133 |
|
{ |
134 |
< |
double t; |
134 |
> |
double t,d; |
135 |
|
int hit; |
136 |
|
/* |
137 |
|
Plane is Ax + By + Cz +D = 0: |
141 |
|
/* line is l = p1 + (p2-p1)t, p1=origin */ |
142 |
|
|
143 |
|
/* Solve for t: */ |
144 |
< |
t = plane_d/-(DOT(plane_n,v)); |
145 |
< |
if(t >0 || ZERO(t)) |
146 |
< |
hit = 1; |
147 |
< |
else |
148 |
< |
hit = 0; |
149 |
< |
r[0] = v[0]*t; |
150 |
< |
r[1] = v[1]*t; |
151 |
< |
r[2] = v[2]*t; |
144 |
> |
d = -(DOT(plane_n,v)); |
145 |
> |
if(ZERO(d)) |
146 |
> |
{ |
147 |
> |
t = FHUGE; |
148 |
> |
hit = 0; |
149 |
> |
} |
150 |
> |
else |
151 |
> |
{ |
152 |
> |
t = plane_d/d; |
153 |
> |
if(t < 0 ) |
154 |
> |
hit = 0; |
155 |
> |
else |
156 |
> |
hit = 1; |
157 |
> |
if(r) |
158 |
> |
{ |
159 |
> |
r[0] = v[0]*t; |
160 |
> |
r[1] = v[1]*t; |
161 |
> |
r[2] = v[2]*t; |
162 |
> |
} |
163 |
> |
} |
164 |
|
if(tptr) |
165 |
|
*tptr = t; |
166 |
|
return(hit); |
186 |
|
*/ |
187 |
|
/* Solve for t: */ |
188 |
|
t = -(DOT(plane_n,orig) + plane_d)/(DOT(plane_n,dir)); |
189 |
< |
if(ZERO(t) || t >0) |
190 |
< |
hit = 1; |
189 |
> |
if(t < 0) |
190 |
> |
hit = 0; |
191 |
|
else |
192 |
+ |
hit = 1; |
193 |
+ |
|
194 |
+ |
if(r) |
195 |
+ |
VSUM(r,orig,dir,t); |
196 |
+ |
|
197 |
+ |
if(pd) |
198 |
+ |
*pd = t; |
199 |
+ |
return(hit); |
200 |
+ |
} |
201 |
+ |
|
202 |
+ |
|
203 |
+ |
int |
204 |
+ |
intersect_edge_plane(e0,e1,plane_n,plane_d,pd,r) |
205 |
+ |
FVECT e0,e1; |
206 |
+ |
FVECT plane_n; |
207 |
+ |
double plane_d; |
208 |
+ |
double *pd; |
209 |
+ |
FVECT r; |
210 |
+ |
{ |
211 |
+ |
double t; |
212 |
+ |
int hit; |
213 |
+ |
FVECT d; |
214 |
+ |
/* |
215 |
+ |
Plane is Ax + By + Cz +D = 0: |
216 |
+ |
plane[0] = A,plane[1] = B,plane[2] = C,plane[3] = D |
217 |
+ |
*/ |
218 |
+ |
/* A(orig[0] + dxt) + B(orig[1] + dyt) + C(orig[2] + dzt) + pd = 0 |
219 |
+ |
t = -(DOT(plane_n,orig)+ plane_d)/(DOT(plane_n,d)) |
220 |
+ |
line is l = p1 + (p2-p1)t |
221 |
+ |
*/ |
222 |
+ |
/* Solve for t: */ |
223 |
+ |
VSUB(d,e1,e0); |
224 |
+ |
t = -(DOT(plane_n,e0) + plane_d)/(DOT(plane_n,d)); |
225 |
+ |
if(t < 0) |
226 |
|
hit = 0; |
227 |
+ |
else |
228 |
+ |
hit = 1; |
229 |
|
|
230 |
< |
VSUM(r,orig,dir,t); |
230 |
> |
VSUM(r,e0,d,t); |
231 |
|
|
232 |
|
if(pd) |
233 |
|
*pd = t; |
257 |
|
n cross x-axis |
258 |
|
*/ |
259 |
|
/* Project p onto the plane */ |
260 |
+ |
/* NOTE: check this: does sideness check?*/ |
261 |
|
if(!intersect_vector_plane(p,n,d,NULL,np)) |
262 |
|
return(FALSE); |
263 |
|
|
290 |
|
} |
291 |
|
|
292 |
|
int |
293 |
< |
test_point_against_spherical_tri(v0,v1,v2,p,n,nset,which,sides) |
293 |
> |
point_set_in_stri(v0,v1,v2,p,n,nset,sides) |
294 |
|
FVECT v0,v1,v2,p; |
295 |
|
FVECT n[3]; |
296 |
< |
char *nset; |
297 |
< |
char *which; |
260 |
< |
char sides[3]; |
296 |
> |
int *nset; |
297 |
> |
int sides[3]; |
298 |
|
|
299 |
|
{ |
300 |
< |
float d; |
264 |
< |
|
300 |
> |
double d; |
301 |
|
/* Find the normal to the triangle ORIGIN:v0:v1 */ |
302 |
|
if(!NTH_BIT(*nset,0)) |
303 |
|
{ |
307 |
|
/* Test the point for sidedness */ |
308 |
|
d = DOT(n[0],p); |
309 |
|
|
310 |
< |
if(ZERO(d)) |
311 |
< |
sides[0] = GT_EDGE; |
312 |
< |
else |
313 |
< |
if(d > 0) |
314 |
< |
{ |
279 |
< |
sides[0] = GT_OUT; |
280 |
< |
sides[1] = sides[2] = GT_INVALID; |
281 |
< |
return(FALSE); |
310 |
> |
if(d > 0.0) |
311 |
> |
{ |
312 |
> |
sides[0] = GT_OUT; |
313 |
> |
sides[1] = sides[2] = GT_INVALID; |
314 |
> |
return(FALSE); |
315 |
|
} |
316 |
|
else |
317 |
|
sides[0] = GT_INTERIOR; |
324 |
|
} |
325 |
|
/* Test the point for sidedness */ |
326 |
|
d = DOT(n[1],p); |
327 |
< |
if(ZERO(d)) |
327 |
> |
if(d > 0.0) |
328 |
|
{ |
296 |
– |
sides[1] = GT_EDGE; |
297 |
– |
/* If on plane 0-and on plane 1: lies on edge */ |
298 |
– |
if(sides[0] == GT_EDGE) |
299 |
– |
{ |
300 |
– |
*which = 1; |
301 |
– |
sides[2] = GT_INVALID; |
302 |
– |
return(GT_EDGE); |
303 |
– |
} |
304 |
– |
} |
305 |
– |
else if(d > 0) |
306 |
– |
{ |
329 |
|
sides[1] = GT_OUT; |
330 |
|
sides[2] = GT_INVALID; |
331 |
|
return(FALSE); |
335 |
|
/* Test next edge */ |
336 |
|
if(!NTH_BIT(*nset,2)) |
337 |
|
{ |
316 |
– |
|
338 |
|
VCROSS(n[2],v0,v2); |
339 |
|
SET_NTH_BIT(*nset,2); |
340 |
|
} |
341 |
|
/* Test the point for sidedness */ |
342 |
|
d = DOT(n[2],p); |
343 |
< |
if(ZERO(d)) |
343 |
> |
if(d > 0.0) |
344 |
|
{ |
345 |
< |
sides[2] = GT_EDGE; |
346 |
< |
|
326 |
< |
/* If on plane 0 and 2: lies on edge 0*/ |
327 |
< |
if(sides[0] == GT_EDGE) |
328 |
< |
{ |
329 |
< |
*which = 0; |
330 |
< |
return(GT_EDGE); |
331 |
< |
} |
332 |
< |
/* If on plane 1 and 2: lies on edge 2*/ |
333 |
< |
if(sides[1] == GT_EDGE) |
334 |
< |
{ |
335 |
< |
*which = 2; |
336 |
< |
return(GT_EDGE); |
337 |
< |
} |
338 |
< |
/* otherwise: on face 2 */ |
339 |
< |
else |
340 |
< |
{ |
341 |
< |
*which = 2; |
342 |
< |
return(GT_FACE); |
343 |
< |
} |
345 |
> |
sides[2] = GT_OUT; |
346 |
> |
return(FALSE); |
347 |
|
} |
345 |
– |
else if(d > 0) |
346 |
– |
{ |
347 |
– |
sides[2] = GT_OUT; |
348 |
– |
return(FALSE); |
349 |
– |
} |
350 |
– |
/* If on edge */ |
348 |
|
else |
349 |
|
sides[2] = GT_INTERIOR; |
353 |
– |
|
354 |
– |
/* If on plane 0 only: on face 0 */ |
355 |
– |
if(sides[0] == GT_EDGE) |
356 |
– |
{ |
357 |
– |
*which = 0; |
358 |
– |
return(GT_FACE); |
359 |
– |
} |
360 |
– |
/* If on plane 1 only: on face 1 */ |
361 |
– |
if(sides[1] == GT_EDGE) |
362 |
– |
{ |
363 |
– |
*which = 1; |
364 |
– |
return(GT_FACE); |
365 |
– |
} |
350 |
|
/* Must be interior to the pyramid */ |
351 |
|
return(GT_INTERIOR); |
352 |
|
} |
355 |
|
|
356 |
|
|
357 |
|
int |
358 |
< |
test_single_point_against_spherical_tri(v0,v1,v2,p,which) |
358 |
> |
point_in_stri(v0,v1,v2,p) |
359 |
|
FVECT v0,v1,v2,p; |
376 |
– |
char *which; |
360 |
|
{ |
361 |
< |
float d; |
361 |
> |
double d; |
362 |
|
FVECT n; |
380 |
– |
char sides[3]; |
363 |
|
|
382 |
– |
/* First test if point coincides with any of the vertices */ |
383 |
– |
if(EQUAL_VEC3(p,v0)) |
384 |
– |
{ |
385 |
– |
*which = 0; |
386 |
– |
return(GT_VERTEX); |
387 |
– |
} |
388 |
– |
if(EQUAL_VEC3(p,v1)) |
389 |
– |
{ |
390 |
– |
*which = 1; |
391 |
– |
return(GT_VERTEX); |
392 |
– |
} |
393 |
– |
if(EQUAL_VEC3(p,v2)) |
394 |
– |
{ |
395 |
– |
*which = 2; |
396 |
– |
return(GT_VERTEX); |
397 |
– |
} |
364 |
|
VCROSS(n,v1,v0); |
365 |
|
/* Test the point for sidedness */ |
366 |
|
d = DOT(n,p); |
367 |
< |
if(ZERO(d)) |
368 |
< |
sides[0] = GT_EDGE; |
369 |
< |
else |
404 |
< |
if(d > 0) |
405 |
< |
return(FALSE); |
406 |
< |
else |
407 |
< |
sides[0] = GT_INTERIOR; |
367 |
> |
if(d > 0.0) |
368 |
> |
return(FALSE); |
369 |
> |
|
370 |
|
/* Test next edge */ |
371 |
|
VCROSS(n,v2,v1); |
372 |
|
/* Test the point for sidedness */ |
373 |
|
d = DOT(n,p); |
374 |
< |
if(ZERO(d)) |
413 |
< |
{ |
414 |
< |
sides[1] = GT_EDGE; |
415 |
< |
/* If on plane 0-and on plane 1: lies on edge */ |
416 |
< |
if(sides[0] == GT_EDGE) |
417 |
< |
{ |
418 |
< |
*which = 1; |
419 |
< |
return(GT_VERTEX); |
420 |
< |
} |
421 |
< |
} |
422 |
< |
else if(d > 0) |
374 |
> |
if(d > 0.0) |
375 |
|
return(FALSE); |
424 |
– |
else |
425 |
– |
sides[1] = GT_INTERIOR; |
376 |
|
|
377 |
|
/* Test next edge */ |
378 |
|
VCROSS(n,v0,v2); |
379 |
|
/* Test the point for sidedness */ |
380 |
|
d = DOT(n,p); |
381 |
< |
if(ZERO(d)) |
432 |
< |
{ |
433 |
< |
sides[2] = GT_EDGE; |
434 |
< |
|
435 |
< |
/* If on plane 0 and 2: lies on edge 0*/ |
436 |
< |
if(sides[0] == GT_EDGE) |
437 |
< |
{ |
438 |
< |
*which = 0; |
439 |
< |
return(GT_VERTEX); |
440 |
< |
} |
441 |
< |
/* If on plane 1 and 2: lies on edge 2*/ |
442 |
< |
if(sides[1] == GT_EDGE) |
443 |
< |
{ |
444 |
< |
*which = 2; |
445 |
< |
return(GT_VERTEX); |
446 |
< |
} |
447 |
< |
/* otherwise: on face 2 */ |
448 |
< |
else |
449 |
< |
{ |
450 |
< |
return(GT_FACE); |
451 |
< |
} |
452 |
< |
} |
453 |
< |
else if(d > 0) |
381 |
> |
if(d > 0.0) |
382 |
|
return(FALSE); |
383 |
|
/* Must be interior to the pyramid */ |
384 |
< |
return(GT_FACE); |
384 |
> |
return(GT_INTERIOR); |
385 |
|
} |
386 |
|
|
387 |
|
int |
388 |
< |
test_vertices_for_tri_inclusion(t0,t1,t2,p0,p1,p2,nset,n,avg,pt_sides) |
388 |
> |
vertices_in_stri(t0,t1,t2,p0,p1,p2,nset,n,avg,pt_sides) |
389 |
|
FVECT t0,t1,t2,p0,p1,p2; |
390 |
< |
char *nset; |
390 |
> |
int *nset; |
391 |
|
FVECT n[3]; |
392 |
|
FVECT avg; |
393 |
< |
char pt_sides[3][3]; |
393 |
> |
int pt_sides[3][3]; |
394 |
|
|
395 |
|
{ |
396 |
< |
char below_plane[3],on_edge,test; |
469 |
< |
char which; |
396 |
> |
int below_plane[3],test; |
397 |
|
|
398 |
|
SUM_3VEC3(avg,t0,t1,t2); |
472 |
– |
on_edge = 0; |
399 |
|
*nset = 0; |
400 |
|
/* Test vertex v[i] against triangle j*/ |
401 |
|
/* Check if v[i] lies below plane defined by avg of 3 vectors |
403 |
|
*/ |
404 |
|
|
405 |
|
/* test point 0 */ |
406 |
< |
if(DOT(avg,p0) < 0) |
406 |
> |
if(DOT(avg,p0) < 0.0) |
407 |
|
below_plane[0] = 1; |
408 |
|
else |
409 |
< |
below_plane[0]=0; |
409 |
> |
below_plane[0] = 0; |
410 |
|
/* Test if b[i] lies in or on triangle a */ |
411 |
< |
test = test_point_against_spherical_tri(t0,t1,t2,p0, |
486 |
< |
n,nset,&which,pt_sides[0]); |
411 |
> |
test = point_set_in_stri(t0,t1,t2,p0,n,nset,pt_sides[0]); |
412 |
|
/* If pts[i] is interior: done */ |
413 |
|
if(!below_plane[0]) |
414 |
|
{ |
415 |
|
if(test == GT_INTERIOR) |
416 |
|
return(TRUE); |
492 |
– |
/* Remember if b[i] fell on one of the 3 defining planes */ |
493 |
– |
if(test) |
494 |
– |
on_edge++; |
417 |
|
} |
418 |
|
/* Now test point 1*/ |
419 |
|
|
420 |
< |
if(DOT(avg,p1) < 0) |
420 |
> |
if(DOT(avg,p1) < 0.0) |
421 |
|
below_plane[1] = 1; |
422 |
|
else |
423 |
|
below_plane[1]=0; |
424 |
|
/* Test if b[i] lies in or on triangle a */ |
425 |
< |
test = test_point_against_spherical_tri(t0,t1,t2,p1, |
504 |
< |
n,nset,&which,pt_sides[1]); |
425 |
> |
test = point_set_in_stri(t0,t1,t2,p1,n,nset,pt_sides[1]); |
426 |
|
/* If pts[i] is interior: done */ |
427 |
|
if(!below_plane[1]) |
428 |
|
{ |
429 |
|
if(test == GT_INTERIOR) |
430 |
|
return(TRUE); |
510 |
– |
/* Remember if b[i] fell on one of the 3 defining planes */ |
511 |
– |
if(test) |
512 |
– |
on_edge++; |
431 |
|
} |
432 |
|
|
433 |
|
/* Now test point 2 */ |
434 |
< |
if(DOT(avg,p2) < 0) |
434 |
> |
if(DOT(avg,p2) < 0.0) |
435 |
|
below_plane[2] = 1; |
436 |
|
else |
437 |
< |
below_plane[2]=0; |
437 |
> |
below_plane[2] = 0; |
438 |
|
/* Test if b[i] lies in or on triangle a */ |
439 |
< |
test = test_point_against_spherical_tri(t0,t1,t2,p2, |
522 |
< |
n,nset,&which,pt_sides[2]); |
439 |
> |
test = point_set_in_stri(t0,t1,t2,p2,n,nset,pt_sides[2]); |
440 |
|
|
441 |
|
/* If pts[i] is interior: done */ |
442 |
|
if(!below_plane[2]) |
443 |
|
{ |
444 |
|
if(test == GT_INTERIOR) |
445 |
|
return(TRUE); |
529 |
– |
/* Remember if b[i] fell on one of the 3 defining planes */ |
530 |
– |
if(test) |
531 |
– |
on_edge++; |
446 |
|
} |
447 |
|
|
448 |
|
/* If all three points below separating plane: trivial reject */ |
449 |
|
if(below_plane[0] && below_plane[1] && below_plane[2]) |
450 |
|
return(FALSE); |
537 |
– |
/* Accept if all points lie on a triangle vertex/edge edge- accept*/ |
538 |
– |
if(on_edge == 3) |
539 |
– |
return(TRUE); |
451 |
|
/* Now check vertices in a against triangle b */ |
452 |
|
return(FALSE); |
453 |
|
} |
455 |
|
|
456 |
|
set_sidedness_tests(t0,t1,t2,p0,p1,p2,test,sides,nset,n) |
457 |
|
FVECT t0,t1,t2,p0,p1,p2; |
458 |
< |
char test[3]; |
459 |
< |
char sides[3][3]; |
460 |
< |
char nset; |
458 |
> |
int test[3]; |
459 |
> |
int sides[3][3]; |
460 |
> |
int nset; |
461 |
|
FVECT n[3]; |
462 |
|
{ |
463 |
< |
char t; |
463 |
> |
int t; |
464 |
|
double d; |
465 |
|
|
466 |
|
|
472 |
|
VCROSS(n[0],t1,t0); |
473 |
|
/* Test the point for sidedness */ |
474 |
|
d = DOT(n[0],p0); |
475 |
< |
if(d >= 0) |
475 |
> |
if(d >= 0.0) |
476 |
|
SET_NTH_BIT(test[0],0); |
477 |
|
} |
478 |
|
else |
485 |
|
VCROSS(n[1],t2,t1); |
486 |
|
/* Test the point for sidedness */ |
487 |
|
d = DOT(n[1],p0); |
488 |
< |
if(d >= 0) |
488 |
> |
if(d >= 0.0) |
489 |
|
SET_NTH_BIT(test[0],1); |
490 |
|
} |
491 |
|
else |
498 |
|
VCROSS(n[2],t0,t2); |
499 |
|
/* Test the point for sidedness */ |
500 |
|
d = DOT(n[2],p0); |
501 |
< |
if(d >= 0) |
501 |
> |
if(d >= 0.0) |
502 |
|
SET_NTH_BIT(test[0],2); |
503 |
|
} |
504 |
|
else |
514 |
|
VCROSS(n[0],t1,t0); |
515 |
|
/* Test the point for sidedness */ |
516 |
|
d = DOT(n[0],p1); |
517 |
< |
if(d >= 0) |
517 |
> |
if(d >= 0.0) |
518 |
|
SET_NTH_BIT(test[1],0); |
519 |
|
} |
520 |
|
else |
528 |
|
VCROSS(n[1],t2,t1); |
529 |
|
/* Test the point for sidedness */ |
530 |
|
d = DOT(n[1],p1); |
531 |
< |
if(d >= 0) |
531 |
> |
if(d >= 0.0) |
532 |
|
SET_NTH_BIT(test[1],1); |
533 |
|
} |
534 |
|
else |
542 |
|
VCROSS(n[2],t0,t2); |
543 |
|
/* Test the point for sidedness */ |
544 |
|
d = DOT(n[2],p1); |
545 |
< |
if(d >= 0) |
545 |
> |
if(d >= 0.0) |
546 |
|
SET_NTH_BIT(test[1],2); |
547 |
|
} |
548 |
|
else |
558 |
|
VCROSS(n[0],t1,t0); |
559 |
|
/* Test the point for sidedness */ |
560 |
|
d = DOT(n[0],p2); |
561 |
< |
if(d >= 0) |
561 |
> |
if(d >= 0.0) |
562 |
|
SET_NTH_BIT(test[2],0); |
563 |
|
} |
564 |
|
else |
571 |
|
VCROSS(n[1],t2,t1); |
572 |
|
/* Test the point for sidedness */ |
573 |
|
d = DOT(n[1],p2); |
574 |
< |
if(d >= 0) |
574 |
> |
if(d >= 0.0) |
575 |
|
SET_NTH_BIT(test[2],1); |
576 |
|
} |
577 |
|
else |
584 |
|
VCROSS(n[2],t0,t2); |
585 |
|
/* Test the point for sidedness */ |
586 |
|
d = DOT(n[2],p2); |
587 |
< |
if(d >= 0) |
587 |
> |
if(d >= 0.0) |
588 |
|
SET_NTH_BIT(test[2],2); |
589 |
|
} |
590 |
|
else |
594 |
|
|
595 |
|
|
596 |
|
int |
597 |
< |
spherical_tri_intersect(a1,a2,a3,b1,b2,b3) |
597 |
> |
stri_intersect(a1,a2,a3,b1,b2,b3) |
598 |
|
FVECT a1,a2,a3,b1,b2,b3; |
599 |
|
{ |
600 |
< |
char which,test,n_set[2]; |
601 |
< |
char sides[2][3][3],i,j,inext,jnext; |
602 |
< |
char tests[2][3]; |
600 |
> |
int which,test,n_set[2]; |
601 |
> |
int sides[2][3][3],i,j,inext,jnext; |
602 |
> |
int tests[2][3]; |
603 |
|
FVECT n[2][3],p,avg[2]; |
604 |
|
|
605 |
|
/* Test the vertices of triangle a against the pyramid formed by triangle |
607 |
|
if all 3 vertices of a are ON the edges of b,return TRUE. Remember |
608 |
|
the results of the edge normal and sidedness tests for later. |
609 |
|
*/ |
610 |
< |
if(test_vertices_for_tri_inclusion(a1,a2,a3,b1,b2,b3, |
700 |
< |
&(n_set[0]),n[0],avg[0],sides[1])) |
610 |
> |
if(vertices_in_stri(a1,a2,a3,b1,b2,b3,&(n_set[0]),n[0],avg[0],sides[1])) |
611 |
|
return(TRUE); |
612 |
|
|
613 |
< |
if(test_vertices_for_tri_inclusion(b1,b2,b3,a1,a2,a3, |
704 |
< |
&(n_set[1]),n[1],avg[1],sides[0])) |
613 |
> |
if(vertices_in_stri(b1,b2,b3,a1,a2,a3,&(n_set[1]),n[1],avg[1],sides[0])) |
614 |
|
return(TRUE); |
615 |
|
|
616 |
|
|
658 |
|
} |
659 |
|
|
660 |
|
int |
661 |
< |
ray_intersect_tri(orig,dir,v0,v1,v2,pt,wptr) |
661 |
> |
ray_intersect_tri(orig,dir,v0,v1,v2,pt) |
662 |
|
FVECT orig,dir; |
663 |
|
FVECT v0,v1,v2; |
664 |
|
FVECT pt; |
756 |
– |
char *wptr; |
665 |
|
{ |
666 |
|
FVECT p0,p1,p2,p,n; |
759 |
– |
char type,which; |
667 |
|
double pd; |
668 |
< |
|
668 |
> |
int type; |
669 |
> |
|
670 |
|
point_on_sphere(p0,v0,orig); |
671 |
|
point_on_sphere(p1,v1,orig); |
672 |
|
point_on_sphere(p2,v2,orig); |
673 |
< |
type = test_single_point_against_spherical_tri(p0,p1,p2,dir,&which); |
674 |
< |
|
767 |
< |
if(type) |
673 |
> |
|
674 |
> |
if(point_in_stri(p0,p1,p2,dir)) |
675 |
|
{ |
676 |
|
/* Intersect the ray with the triangle plane */ |
677 |
|
tri_plane_equation(v0,v1,v2,n,&pd,FALSE); |
678 |
< |
intersect_ray_plane(orig,dir,n,pd,NULL,pt); |
678 |
> |
return(intersect_ray_plane(orig,dir,n,pd,NULL,pt)); |
679 |
|
} |
680 |
< |
if(wptr) |
774 |
< |
*wptr = which; |
775 |
< |
|
776 |
< |
return(type); |
680 |
> |
return(FALSE); |
681 |
|
} |
682 |
|
|
683 |
|
|
740 |
|
|
741 |
|
|
742 |
|
int |
743 |
< |
spherical_polygon_edge_intersect(a0,a1,b0,b1) |
743 |
> |
sedge_intersect(a0,a1,b0,b1) |
744 |
|
FVECT a0,a1,b0,b1; |
745 |
|
{ |
746 |
|
FVECT na,nb,avga,avgb,p; |
804 |
|
|
805 |
|
} |
806 |
|
|
807 |
+ |
bary_ith_child(coord,i) |
808 |
+ |
double coord[3]; |
809 |
+ |
int i; |
810 |
+ |
{ |
811 |
+ |
|
812 |
+ |
switch(i){ |
813 |
+ |
case 0: |
814 |
+ |
/* update bary for child */ |
815 |
+ |
coord[0] = 2.0*coord[0]- 1.0; |
816 |
+ |
coord[1] *= 2.0; |
817 |
+ |
coord[2] *= 2.0; |
818 |
+ |
break; |
819 |
+ |
case 1: |
820 |
+ |
coord[0] *= 2.0; |
821 |
+ |
coord[1] = 2.0*coord[1]- 1.0; |
822 |
+ |
coord[2] *= 2.0; |
823 |
+ |
break; |
824 |
+ |
case 2: |
825 |
+ |
coord[0] *= 2.0; |
826 |
+ |
coord[1] *= 2.0; |
827 |
+ |
coord[2] = 2.0*coord[2]- 1.0; |
828 |
+ |
break; |
829 |
+ |
case 3: |
830 |
+ |
coord[0] = 1.0 - 2.0*coord[0]; |
831 |
+ |
coord[1] = 1.0 - 2.0*coord[1]; |
832 |
+ |
coord[2] = 1.0 - 2.0*coord[2]; |
833 |
+ |
break; |
834 |
+ |
#ifdef DEBUG |
835 |
+ |
default: |
836 |
+ |
eputs("bary_ith_child():Invalid child\n"); |
837 |
+ |
break; |
838 |
+ |
#endif |
839 |
+ |
} |
840 |
+ |
} |
841 |
+ |
|
842 |
+ |
|
843 |
|
int |
844 |
< |
bary2d_child(coord) |
844 |
> |
bary_child(coord) |
845 |
|
double coord[3]; |
846 |
|
{ |
847 |
|
int i; |
848 |
|
|
909 |
– |
/* First check if one of the original vertices */ |
910 |
– |
for(i=0;i<3;i++) |
911 |
– |
if(EQUAL(coord[i],1.0)) |
912 |
– |
return(i); |
913 |
– |
|
914 |
– |
/* Check if one of the new vertices: for all return center child */ |
915 |
– |
if(ZERO(coord[0]) && EQUAL(coord[1],0.5)) |
916 |
– |
{ |
917 |
– |
coord[0] = 1.0f; |
918 |
– |
coord[1] = 0.0f; |
919 |
– |
coord[2] = 0.0f; |
920 |
– |
return(3); |
921 |
– |
} |
922 |
– |
if(ZERO(coord[1]) && EQUAL(coord[0],0.5)) |
923 |
– |
{ |
924 |
– |
coord[0] = 0.0f; |
925 |
– |
coord[1] = 1.0f; |
926 |
– |
coord[2] = 0.0f; |
927 |
– |
return(3); |
928 |
– |
} |
929 |
– |
if(ZERO(coord[2]) && EQUAL(coord[0],0.5)) |
930 |
– |
{ |
931 |
– |
coord[0] = 0.0f; |
932 |
– |
coord[1] = 0.0f; |
933 |
– |
coord[2] = 1.0f; |
934 |
– |
return(3); |
935 |
– |
} |
936 |
– |
|
937 |
– |
/* Otherwise return child */ |
849 |
|
if(coord[0] > 0.5) |
850 |
|
{ |
851 |
|
/* update bary for child */ |
879 |
|
} |
880 |
|
} |
881 |
|
|
882 |
+ |
/* Coord was the ith child of the parent: set the coordinate |
883 |
+ |
relative to the parent |
884 |
+ |
*/ |
885 |
+ |
bary_parent(coord,i) |
886 |
+ |
double coord[3]; |
887 |
+ |
int i; |
888 |
+ |
{ |
889 |
+ |
|
890 |
+ |
switch(i) { |
891 |
+ |
case 0: |
892 |
+ |
/* update bary for child */ |
893 |
+ |
coord[0] = coord[0]*0.5 + 0.5; |
894 |
+ |
coord[1] *= 0.5; |
895 |
+ |
coord[2] *= 0.5; |
896 |
+ |
break; |
897 |
+ |
case 1: |
898 |
+ |
coord[0] *= 0.5; |
899 |
+ |
coord[1] = coord[1]*0.5 + 0.5; |
900 |
+ |
coord[2] *= 0.5; |
901 |
+ |
break; |
902 |
+ |
|
903 |
+ |
case 2: |
904 |
+ |
coord[0] *= 0.5; |
905 |
+ |
coord[1] *= 0.5; |
906 |
+ |
coord[2] = coord[2]*0.5 + 0.5; |
907 |
+ |
break; |
908 |
+ |
|
909 |
+ |
case 3: |
910 |
+ |
coord[0] = 0.5 - 0.5*coord[0]; |
911 |
+ |
coord[1] = 0.5 - 0.5*coord[1]; |
912 |
+ |
coord[2] = 0.5 - 0.5*coord[2]; |
913 |
+ |
break; |
914 |
+ |
#ifdef DEBUG |
915 |
+ |
default: |
916 |
+ |
eputs("bary_parent():Invalid child\n"); |
917 |
+ |
break; |
918 |
+ |
#endif |
919 |
+ |
} |
920 |
+ |
} |
921 |
+ |
|
922 |
+ |
bary_from_child(coord,child,next) |
923 |
+ |
double coord[3]; |
924 |
+ |
int child,next; |
925 |
+ |
{ |
926 |
+ |
#ifdef DEBUG |
927 |
+ |
if(child <0 || child > 3) |
928 |
+ |
{ |
929 |
+ |
eputs("bary_from_child():Invalid child\n"); |
930 |
+ |
return; |
931 |
+ |
} |
932 |
+ |
if(next <0 || next > 3) |
933 |
+ |
{ |
934 |
+ |
eputs("bary_from_child():Invalid next\n"); |
935 |
+ |
return; |
936 |
+ |
} |
937 |
+ |
#endif |
938 |
+ |
if(next == child) |
939 |
+ |
return; |
940 |
+ |
|
941 |
+ |
switch(child){ |
942 |
+ |
case 0: |
943 |
+ |
switch(next){ |
944 |
+ |
case 1: |
945 |
+ |
coord[0] += 1.0; |
946 |
+ |
coord[1] -= 1.0; |
947 |
+ |
break; |
948 |
+ |
case 2: |
949 |
+ |
coord[0] += 1.0; |
950 |
+ |
coord[2] -= 1.0; |
951 |
+ |
break; |
952 |
+ |
case 3: |
953 |
+ |
coord[0] *= -1.0; |
954 |
+ |
coord[1] = 1 - coord[1]; |
955 |
+ |
coord[2] = 1 - coord[2]; |
956 |
+ |
break; |
957 |
+ |
|
958 |
+ |
} |
959 |
+ |
break; |
960 |
+ |
case 1: |
961 |
+ |
switch(next){ |
962 |
+ |
case 0: |
963 |
+ |
coord[0] -= 1.0; |
964 |
+ |
coord[1] += 1.0; |
965 |
+ |
break; |
966 |
+ |
case 2: |
967 |
+ |
coord[1] += 1.0; |
968 |
+ |
coord[2] -= 1.0; |
969 |
+ |
break; |
970 |
+ |
case 3: |
971 |
+ |
coord[0] = 1 - coord[0]; |
972 |
+ |
coord[1] *= -1.0; |
973 |
+ |
coord[2] = 1 - coord[2]; |
974 |
+ |
break; |
975 |
+ |
} |
976 |
+ |
break; |
977 |
+ |
case 2: |
978 |
+ |
switch(next){ |
979 |
+ |
case 0: |
980 |
+ |
coord[0] -= 1.0; |
981 |
+ |
coord[2] += 1.0; |
982 |
+ |
break; |
983 |
+ |
case 1: |
984 |
+ |
coord[1] -= 1.0; |
985 |
+ |
coord[2] += 1.0; |
986 |
+ |
break; |
987 |
+ |
case 3: |
988 |
+ |
coord[0] = 1 - coord[0]; |
989 |
+ |
coord[1] = 1 - coord[1]; |
990 |
+ |
coord[2] *= -1.0; |
991 |
+ |
break; |
992 |
+ |
} |
993 |
+ |
break; |
994 |
+ |
case 3: |
995 |
+ |
switch(next){ |
996 |
+ |
case 0: |
997 |
+ |
coord[0] *= -1.0; |
998 |
+ |
coord[1] = 1 - coord[1]; |
999 |
+ |
coord[2] = 1 - coord[2]; |
1000 |
+ |
break; |
1001 |
+ |
case 1: |
1002 |
+ |
coord[0] = 1 - coord[0]; |
1003 |
+ |
coord[1] *= -1.0; |
1004 |
+ |
coord[2] = 1 - coord[2]; |
1005 |
+ |
break; |
1006 |
+ |
case 2: |
1007 |
+ |
coord[0] = 1 - coord[0]; |
1008 |
+ |
coord[1] = 1 - coord[1]; |
1009 |
+ |
coord[2] *= -1.0; |
1010 |
+ |
break; |
1011 |
+ |
} |
1012 |
+ |
break; |
1013 |
+ |
} |
1014 |
+ |
} |
1015 |
+ |
|
1016 |
|
int |
1017 |
|
max_index(v) |
1018 |
|
FVECT v; |
1031 |
|
|
1032 |
|
/* |
1033 |
|
* int |
1034 |
< |
* smRay(FVECT orig, FVECT dir,FVECT v0,FVECT v1,FVECT v2,FVECT r) |
1034 |
> |
* traceRay(FVECT orig, FVECT dir,FVECT v0,FVECT v1,FVECT v2,FVECT r) |
1035 |
|
* |
1036 |
|
* Intersect the ray with triangle v0v1v2, return intersection point in r |
1037 |
|
* |
1046 |
|
{ |
1047 |
|
FVECT n,p[3],d; |
1048 |
|
double pt[3],r_eps; |
1049 |
< |
char i; |
1049 |
> |
int i; |
1050 |
|
int which; |
1051 |
|
|
1052 |
|
/* Find the plane equation for the triangle defined by the edge v0v1 and |
1098 |
|
VSUM(r,orig,dir,(20*FTINY)/r_eps); |
1099 |
|
normalize(r); |
1100 |
|
#ifdef DEBUG |
1101 |
< |
eputs("traceRay:Ray does not intersect triangle"); |
1101 |
> |
eputs("traceRay:Ray does not intersect triangle\n"); |
1102 |
|
#endif |
1103 |
|
return(FALSE); |
1104 |
|
} |
1105 |
|
} |
1106 |
|
|
1107 |
|
|
1108 |
+ |
int |
1109 |
+ |
closest_point_in_tri(p0,p1,p2,p,p0id,p1id,p2id) |
1110 |
+ |
FVECT p0,p1,p2,p; |
1111 |
+ |
int p0id,p1id,p2id; |
1112 |
+ |
{ |
1113 |
+ |
double d,d1; |
1114 |
+ |
int i; |
1115 |
+ |
|
1116 |
+ |
d = DIST_SQ(p,p0); |
1117 |
+ |
d1 = DIST_SQ(p,p1); |
1118 |
+ |
if(d < d1) |
1119 |
+ |
{ |
1120 |
+ |
d1 = DIST_SQ(p,p2); |
1121 |
+ |
i = (d1 < d)?p2id:p0id; |
1122 |
+ |
} |
1123 |
+ |
else |
1124 |
+ |
{ |
1125 |
+ |
d = DIST_SQ(p,p2); |
1126 |
+ |
i = (d < d1)? p2id:p1id; |
1127 |
+ |
} |
1128 |
+ |
return(i); |
1129 |
+ |
} |
1130 |
|
|
1131 |
|
|
1132 |
|
|