27 |
|
|
28 |
|
extern double dstrsrc; /* source distribution amount */ |
29 |
|
extern double shadthresh; /* relative shadow threshold */ |
30 |
+ |
extern double shadcert; /* shadow testing certainty */ |
31 |
|
|
32 |
|
SRCREC *source = NULL; /* our list of sources */ |
33 |
|
int nsources = 0; /* the number of sources */ |
47 |
|
|
48 |
|
m = objptr(o->omod); |
49 |
|
|
50 |
< |
if (m->otype != MAT_LIGHT && |
50 |
< |
m->otype != MAT_ILLUM && |
51 |
< |
m->otype != MAT_GLOW) |
50 |
> |
if (!islight(m->otype)) |
51 |
|
continue; |
52 |
|
|
53 |
< |
if (m->oargs.nfargs != 3) |
53 |
> |
if (m->oargs.nfargs != (m->otype == MAT_GLOW ? 4 : |
54 |
> |
m->otype == MAT_SPOT ? 7 : 3)) |
55 |
|
objerror(m, USER, "bad # arguments"); |
56 |
|
|
57 |
< |
if (m->otype == MAT_GLOW && o->otype != OBJ_SOURCE) |
57 |
> |
if (m->otype == MAT_GLOW && |
58 |
> |
o->otype != OBJ_SOURCE && |
59 |
> |
m->oargs.farg[3] <= FTINY) |
60 |
|
continue; /* don't bother */ |
61 |
|
|
62 |
|
if (source == NULL) |
69 |
|
|
70 |
|
newsource(&source[nsources], o); |
71 |
|
|
72 |
< |
if (m->otype == MAT_GLOW) |
73 |
< |
source[nsources].sflags |= SSKIP; |
74 |
< |
|
72 |
> |
if (m->otype == MAT_GLOW) { |
73 |
> |
source[nsources].sflags |= SPROX; |
74 |
> |
source[nsources].sl.prox = m->oargs.farg[3]; |
75 |
> |
if (o->otype == OBJ_SOURCE) |
76 |
> |
source[nsources].sflags |= SSKIP; |
77 |
> |
} else if (m->otype == MAT_SPOT) { |
78 |
> |
source[nsources].sflags |= SSPOT; |
79 |
> |
source[nsources].sl.s = makespot(m); |
80 |
> |
} |
81 |
|
nsources++; |
82 |
|
} |
83 |
|
} |
95 |
|
register int i; |
96 |
|
|
97 |
|
src->sflags = 0; |
98 |
< |
src->nhits = src->ntests = 1; /* start with hit probability = 1 */ |
98 |
> |
src->nhits = 1; src->ntests = 2; /* start probability = 1/2 */ |
99 |
|
src->so = so; |
100 |
|
|
101 |
|
switch (so->otype) { |
147 |
|
} |
148 |
|
|
149 |
|
|
150 |
+ |
SPOT * |
151 |
+ |
makespot(m) /* make a spotlight */ |
152 |
+ |
register OBJREC *m; |
153 |
+ |
{ |
154 |
+ |
extern double cos(); |
155 |
+ |
register SPOT *ns; |
156 |
+ |
|
157 |
+ |
if ((ns = (SPOT *)malloc(sizeof(SPOT))) == NULL) |
158 |
+ |
error(SYSTEM, "out of memory in makespot"); |
159 |
+ |
ns->siz = 2.0*PI * (1.0 - cos(PI/180.0/2.0 * m->oargs.farg[3])); |
160 |
+ |
VCOPY(ns->aim, m->oargs.farg+4); |
161 |
+ |
if ((ns->flen = normalize(ns->aim)) == 0.0) |
162 |
+ |
objerror(m, USER, "zero focus vector"); |
163 |
+ |
return(ns); |
164 |
+ |
} |
165 |
+ |
|
166 |
+ |
|
167 |
|
double |
168 |
|
srcray(sr, r, sn) /* send a ray to a source, return domega */ |
169 |
|
register RAY *sr; /* returned source ray */ |
224 |
|
return(source[sn].ss2); |
225 |
|
|
226 |
|
else { |
227 |
+ |
/* check proximity */ |
228 |
+ |
if (source[sn].sflags & SPROX && |
229 |
+ |
d > source[sn].sl.prox) |
230 |
+ |
return(0.0); |
231 |
|
|
232 |
|
if (norm != NULL) |
233 |
|
ddot /= d; |
234 |
|
else |
235 |
|
ddot = 1.0; |
236 |
+ |
/* check angle */ |
237 |
+ |
if (source[sn].sflags & SSPOT) { |
238 |
+ |
if (source[sn].sl.s->siz < 2.0*PI * |
239 |
+ |
(1.0 + DOT(source[sn].sl.s->aim,sr->rdir))) |
240 |
+ |
return(0.0); |
241 |
+ |
d += source[sn].sl.s->flen; |
242 |
+ |
} |
243 |
|
/* return domega */ |
244 |
|
return(ddot*source[sn].ss2/(d*d)); |
245 |
|
} |
284 |
|
|
285 |
|
static int |
286 |
|
cntcmp(sc1, sc2) /* contribution compare (descending) */ |
287 |
< |
register CONTRIB *sc1, *sc2; |
287 |
> |
register CNTPTR *sc1, *sc2; |
288 |
|
{ |
289 |
|
if (sc1->brt > sc2->brt) |
290 |
|
return(-1); |
299 |
|
int (*f)(); /* direct component coefficient function */ |
300 |
|
char *p; /* data for f */ |
301 |
|
{ |
302 |
+ |
extern double pow(); |
303 |
|
register int sn; |
304 |
|
register CONTRIB *srccnt; |
305 |
< |
double dtmp, hwt, test2, hit2; |
305 |
> |
register CNTPTR *cntord; |
306 |
> |
int nshadcheck, ncnts; |
307 |
> |
double prob, ourthresh, hwt, test2, hit2; |
308 |
|
RAY sr; |
309 |
|
|
310 |
< |
if ((srccnt = (CONTRIB *)malloc(nsources*sizeof(CONTRIB))) == NULL) |
310 |
> |
if (nsources <= 0) |
311 |
> |
return; |
312 |
> |
srccnt = (CONTRIB *)malloc(nsources*sizeof(CONTRIB)); |
313 |
> |
cntord = (CNTPTR *)malloc(nsources*sizeof(CNTPTR)); |
314 |
> |
if (srccnt == NULL || cntord == NULL) |
315 |
|
error(SYSTEM, "out of memory in direct"); |
316 |
+ |
/* compute number to check */ |
317 |
+ |
nshadcheck = pow((double)nsources, shadcert) + .5; |
318 |
+ |
/* modify threshold */ |
319 |
+ |
ourthresh = shadthresh / r->rweight; |
320 |
|
/* potential contributions */ |
321 |
|
for (sn = 0; sn < nsources; sn++) { |
322 |
< |
srccnt[sn].sno = sn; |
323 |
< |
setcolor(srccnt[sn].val, 0.0, 0.0, 0.0); |
322 |
> |
cntord[sn].sno = sn; |
323 |
> |
cntord[sn].brt = 0.0; |
324 |
|
/* get source ray */ |
325 |
|
if ((srccnt[sn].dom = srcray(&sr, r, sn)) == 0.0) |
326 |
|
continue; |
327 |
|
VCOPY(srccnt[sn].dir, sr.rdir); |
328 |
|
/* compute coefficient */ |
329 |
|
(*f)(srccnt[sn].val, p, srccnt[sn].dir, srccnt[sn].dom); |
330 |
< |
srccnt[sn].brt = intens(srccnt[sn].val); |
331 |
< |
if (srccnt[sn].brt <= FTINY) |
330 |
> |
cntord[sn].brt = bright(srccnt[sn].val); |
331 |
> |
if (cntord[sn].brt <= 0.0) |
332 |
|
continue; |
333 |
|
/* compute intersection */ |
334 |
|
if (!( source[sn].sflags & SDISTANT ? |
337 |
|
(source[sn].so, &sr) )) |
338 |
|
continue; |
339 |
|
/* compute contribution */ |
340 |
< |
rayshade(&sr, sr.ro->omod); |
340 |
> |
raycont(&sr); |
341 |
|
multcolor(srccnt[sn].val, sr.rcol); |
342 |
< |
srccnt[sn].brt = intens(srccnt[sn].val); |
342 |
> |
cntord[sn].brt = bright(srccnt[sn].val); |
343 |
|
} |
344 |
|
/* sort contributions */ |
345 |
< |
qsort(srccnt, nsources, sizeof(CONTRIB), cntcmp); |
346 |
< |
hit2 = test2 = 0.0; |
345 |
> |
qsort(cntord, nsources, sizeof(CNTPTR), cntcmp); |
346 |
> |
{ /* find last */ |
347 |
> |
register int l, m; |
348 |
> |
|
349 |
> |
sn = 0; ncnts = l = nsources; |
350 |
> |
while ((m = (sn + ncnts) >> 1) != l) { |
351 |
> |
if (cntord[m].brt > 0.0) |
352 |
> |
sn = m; |
353 |
> |
else |
354 |
> |
ncnts = m; |
355 |
> |
l = m; |
356 |
> |
} |
357 |
> |
} |
358 |
> |
/* accumulate tail */ |
359 |
> |
for (sn = ncnts-1; sn > 0; sn--) |
360 |
> |
cntord[sn-1].brt += cntord[sn].brt; |
361 |
> |
/* start with prob=.5 */ |
362 |
> |
hit2 = 0.5; test2 = 1.0; |
363 |
|
/* test for shadows */ |
364 |
< |
for (sn = 0; sn < nsources; sn++) { |
364 |
> |
for (sn = 0; sn < ncnts; sn++) { |
365 |
|
/* check threshold */ |
366 |
< |
if (srccnt[sn].brt <= shadthresh*intens(r->rcol)/r->rweight) |
366 |
> |
if ((sn+nshadcheck>=ncnts ? cntord[sn].brt : |
367 |
> |
cntord[sn].brt-cntord[sn+nshadcheck].brt) < |
368 |
> |
ourthresh*bright(r->rcol)) |
369 |
|
break; |
370 |
|
/* get statistics */ |
371 |
< |
hwt = (double)source[srccnt[sn].sno].nhits / |
372 |
< |
(double)source[srccnt[sn].sno].ntests; |
371 |
> |
hwt = (double)source[cntord[sn].sno].nhits / |
372 |
> |
(double)source[cntord[sn].sno].ntests; |
373 |
|
test2 += hwt; |
374 |
< |
source[srccnt[sn].sno].ntests++; |
374 |
> |
source[cntord[sn].sno].ntests++; |
375 |
|
/* test for hit */ |
376 |
|
rayorigin(&sr, r, SHADOW, 1.0); |
377 |
< |
VCOPY(sr.rdir, srccnt[sn].dir); |
377 |
> |
VCOPY(sr.rdir, srccnt[cntord[sn].sno].dir); |
378 |
> |
sr.rsrc = cntord[sn].sno; |
379 |
|
if (localhit(&sr, &thescene) && |
380 |
< |
sr.ro != source[srccnt[sn].sno].so) { |
380 |
> |
sr.ro != source[cntord[sn].sno].so) { |
381 |
|
/* check for transmission */ |
382 |
< |
if (sr.clipset != NULL && inset(sr.clipset,sr.ro->omod)) |
383 |
< |
raytrans(&sr); /* object is clipped */ |
318 |
< |
else |
319 |
< |
rayshade(&sr, sr.ro->omod); |
320 |
< |
if (intens(sr.rcol) <= FTINY) |
382 |
> |
raycont(&sr); |
383 |
> |
if (bright(sr.rcol) <= FTINY) |
384 |
|
continue; /* missed! */ |
385 |
< |
(*f)(srccnt[sn].val, p, srccnt[sn].dir, srccnt[sn].dom); |
386 |
< |
multcolor(srccnt[sn].val, sr.rcol); |
385 |
> |
(*f)(srccnt[cntord[sn].sno].val, p, |
386 |
> |
srccnt[cntord[sn].sno].dir, |
387 |
> |
srccnt[cntord[sn].sno].dom); |
388 |
> |
multcolor(srccnt[cntord[sn].sno].val, sr.rcol); |
389 |
|
} |
390 |
|
/* add contribution if hit */ |
391 |
< |
addcolor(r->rcol, srccnt[sn].val); |
391 |
> |
addcolor(r->rcol, srccnt[cntord[sn].sno].val); |
392 |
|
hit2 += hwt; |
393 |
< |
source[srccnt[sn].sno].nhits++; |
393 |
> |
source[cntord[sn].sno].nhits++; |
394 |
|
} |
395 |
< |
if (test2 > FTINY) /* weighted hit rate */ |
396 |
< |
hwt = hit2 / test2; |
332 |
< |
else |
333 |
< |
hwt = 0.0; |
395 |
> |
/* weighted hit rate */ |
396 |
> |
hwt = hit2 / test2; |
397 |
|
#ifdef DEBUG |
398 |
< |
fprintf(stderr, "%d tested, %f hit rate\n", sn, hwt); |
398 |
> |
sprintf(errmsg, "%d tested, %d untested, %f hit rate\n", |
399 |
> |
sn, ncnts-sn, hwt); |
400 |
> |
eputs(errmsg); |
401 |
|
#endif |
402 |
|
/* add in untested sources */ |
403 |
< |
for ( ; sn < nsources; sn++) { |
404 |
< |
if (srccnt[sn].brt <= 0.0) |
405 |
< |
break; |
406 |
< |
dtmp = hwt * (double)source[srccnt[sn].sno].nhits / |
407 |
< |
(double)source[srccnt[sn].sno].ntests; |
343 |
< |
scalecolor(srccnt[sn].val, dtmp); |
344 |
< |
addcolor(r->rcol, srccnt[sn].val); |
403 |
> |
for ( ; sn < ncnts; sn++) { |
404 |
> |
prob = hwt * (double)source[cntord[sn].sno].nhits / |
405 |
> |
(double)source[cntord[sn].sno].ntests; |
406 |
> |
scalecolor(srccnt[cntord[sn].sno].val, prob); |
407 |
> |
addcolor(r->rcol, srccnt[cntord[sn].sno].val); |
408 |
|
} |
409 |
|
|
410 |
< |
free(srccnt); |
410 |
> |
free((char *)srccnt); |
411 |
> |
free((char *)cntord); |
412 |
|
} |
413 |
|
|
414 |
|
|
417 |
|
source[r->rsrc].so!=r->ro) |
418 |
|
|
419 |
|
#define badambient(m, r) ((r->crtype&(AMBIENT|SHADOW))==AMBIENT && \ |
420 |
< |
!(r->rtype&REFLECTED)) /* hack! */ |
420 |
> |
!(r->rtype&REFLECTED) && /* hack! */\ |
421 |
> |
!(m->otype==MAT_GLOW&&r->rot>m->oargs.farg[3])) |
422 |
|
|
423 |
|
#define passillum(m, r) (m->otype==MAT_ILLUM && \ |
424 |
|
!(r->rsrc>=0&&source[r->rsrc].so==r->ro)) |
428 |
|
register OBJREC *m; |
429 |
|
register RAY *r; |
430 |
|
{ |
366 |
– |
/* check for behind */ |
367 |
– |
if (r->rod < 0.0) |
368 |
– |
return; |
431 |
|
/* check for over-counting */ |
432 |
|
if (wrongsource(m, r) || badambient(m, r)) |
433 |
|
return; |
441 |
|
|
442 |
|
/* otherwise treat as source */ |
443 |
|
} else { |
444 |
+ |
/* check for behind */ |
445 |
+ |
if (r->rod < 0.0) |
446 |
+ |
return; |
447 |
|
/* get distribution pattern */ |
448 |
|
raytexture(r, m->omod); |
449 |
|
/* get source color */ |
452 |
|
m->oargs.farg[2]); |
453 |
|
/* modify value */ |
454 |
|
multcolor(r->rcol, r->pcol); |
455 |
+ |
/* assign distance */ |
456 |
+ |
r->rt = r->rot; |
457 |
|
} |
458 |
|
} |
392 |
– |
|
393 |
– |
|
394 |
– |
o_source() {} /* intersection with a source is done elsewhere */ |