12 |
|
#include "rtotypes.h" |
13 |
|
#include "source.h" |
14 |
|
#include "random.h" |
15 |
+ |
#include "pmapsrc.h" |
16 |
+ |
#include "pmapmat.h" |
17 |
|
|
16 |
– |
extern double ssampdist; /* scatter sampling distance */ |
17 |
– |
|
18 |
|
#ifndef MAXSSAMP |
19 |
|
#define MAXSSAMP 16 /* maximum samples per ray */ |
20 |
|
#endif |
42 |
|
static int cntcmp(const void *p1, const void *p2); |
43 |
|
|
44 |
|
|
45 |
< |
extern OBJREC * /* find an object's actual material */ |
46 |
< |
findmaterial(register OBJREC *o) |
45 |
> |
OBJREC * /* find an object's actual material */ |
46 |
> |
findmaterial(OBJREC *o) |
47 |
|
{ |
48 |
|
while (!ismaterial(o->otype)) { |
49 |
|
if (o->otype == MOD_ALIAS && o->oargs.nsargs) { |
55 |
|
ao = objptr(aobj); |
56 |
|
if (ismaterial(ao->otype)) |
57 |
|
return(ao); |
58 |
+ |
if (ao->otype == MOD_ALIAS) { |
59 |
+ |
o = ao; |
60 |
+ |
continue; |
61 |
+ |
} |
62 |
|
} |
63 |
|
if (o->omod == OVOID) |
64 |
|
return(NULL); |
68 |
|
} |
69 |
|
|
70 |
|
|
71 |
< |
extern void |
71 |
> |
void |
72 |
|
marksources(void) /* find and mark source objects */ |
73 |
|
{ |
74 |
|
int foundsource = 0; |
75 |
|
int i; |
76 |
< |
register OBJREC *o, *m; |
77 |
< |
register int ns; |
76 |
> |
OBJREC *o, *m; |
77 |
> |
int ns; |
78 |
|
/* initialize dispatch table */ |
79 |
|
initstypes(); |
80 |
|
/* find direct sources */ |
86 |
|
continue; |
87 |
|
/* find material */ |
88 |
|
m = findmaterial(objptr(o->omod)); |
89 |
< |
if (m == NULL || !islight(m->otype)) |
89 |
> |
if (m == NULL) |
90 |
> |
continue; |
91 |
> |
if (m->otype == MAT_CLIP) { |
92 |
> |
markclip(m); /* special case for antimatter */ |
93 |
> |
continue; |
94 |
> |
} |
95 |
> |
if (!islight(m->otype)) |
96 |
|
continue; /* not source modifier */ |
97 |
|
|
98 |
|
if (m->oargs.nfargs != (m->otype == MAT_GLOW ? 4 : |
99 |
|
m->otype == MAT_SPOT ? 7 : 3)) |
100 |
|
objerror(m, USER, "bad # arguments"); |
101 |
|
|
92 |
– |
if (m->otype == MAT_GLOW && |
93 |
– |
o->otype != OBJ_SOURCE && |
94 |
– |
m->oargs.farg[3] <= FTINY) |
95 |
– |
continue; /* don't bother */ |
102 |
|
if (m->oargs.farg[0] <= FTINY && m->oargs.farg[1] <= FTINY && |
103 |
|
m->oargs.farg[2] <= FTINY) |
104 |
|
continue; /* don't bother */ |
105 |
< |
|
105 |
> |
if (m->otype == MAT_GLOW && |
106 |
> |
o->otype != OBJ_SOURCE && |
107 |
> |
m->oargs.farg[3] <= FTINY) { |
108 |
> |
foundsource += (ambounce > 0); |
109 |
> |
continue; /* don't track these */ |
110 |
> |
} |
111 |
|
if (sfun[o->otype].of == NULL || |
112 |
|
sfun[o->otype].of->setsrc == NULL) |
113 |
|
objerror(o, USER, "illegal material"); |
120 |
|
if (m->otype == MAT_GLOW) { |
121 |
|
source[ns].sflags |= SPROX; |
122 |
|
source[ns].sl.prox = m->oargs.farg[3]; |
123 |
< |
if (source[ns].sflags & SDISTANT) |
123 |
> |
if (source[ns].sflags & SDISTANT) { |
124 |
|
source[ns].sflags |= SSKIP; |
125 |
+ |
foundsource += (ambounce > 0); |
126 |
+ |
} |
127 |
|
} else if (m->otype == MAT_SPOT) { |
128 |
|
source[ns].sflags |= SSPOT; |
129 |
|
if ((source[ns].sl.s = makespot(m)) == NULL) |
135 |
|
source[ns].sflags |= SSKIP; |
136 |
|
} |
137 |
|
} |
138 |
< |
#if SHADCACHE |
126 |
< |
initobscache(ns); |
127 |
< |
#endif |
128 |
< |
if (!(source[ns].sflags & SSKIP)) |
129 |
< |
foundsource++; |
138 |
> |
foundsource += !(source[ns].sflags & SSKIP); |
139 |
|
} |
140 |
|
if (!foundsource) { |
141 |
|
error(WARNING, "no light sources found"); |
142 |
|
return; |
143 |
|
} |
144 |
< |
markvirtuals(); /* find and add virtual sources */ |
144 |
> |
#if SHADCACHE |
145 |
> |
for (ns = 0; ns < nsources; ns++) /* initialize obstructor cache */ |
146 |
> |
initobscache(ns); |
147 |
> |
#endif |
148 |
> |
/* PMAP: disable virtual sources */ |
149 |
> |
if (!photonMapping) |
150 |
> |
markvirtuals(); /* find and add virtual sources */ |
151 |
> |
|
152 |
|
/* allocate our contribution arrays */ |
153 |
|
maxcntr = nsources + MAXSPART; /* start with this many */ |
154 |
|
srccnt = (CONTRIB *)malloc(maxcntr*sizeof(CONTRIB)); |
161 |
|
} |
162 |
|
|
163 |
|
|
164 |
< |
extern void |
164 |
> |
void |
165 |
|
freesources(void) /* free all source structures */ |
166 |
|
{ |
167 |
|
if (nsources > 0) { |
173 |
|
source = NULL; |
174 |
|
nsources = 0; |
175 |
|
} |
176 |
+ |
markclip(NULL); |
177 |
|
if (maxcntr <= 0) |
178 |
|
return; |
179 |
|
free((void *)srccnt); |
184 |
|
} |
185 |
|
|
186 |
|
|
187 |
< |
extern int |
187 |
> |
int |
188 |
|
srcray( /* send a ray to a source, return domega */ |
189 |
< |
register RAY *sr, /* returned source ray */ |
189 |
> |
RAY *sr, /* returned source ray */ |
190 |
|
RAY *r, /* ray which hit object */ |
191 |
|
SRCINDEX *si /* source sample index */ |
192 |
|
) |
193 |
|
{ |
194 |
< |
double d; /* distance to source */ |
195 |
< |
register SRCREC *srcp; |
194 |
> |
double d; /* distance to source */ |
195 |
> |
SRCREC *srcp; |
196 |
|
|
197 |
< |
rayorigin(sr, r, SHADOW, 1.0); /* ignore limits */ |
197 |
> |
rayorigin(sr, SHADOW, r, NULL); /* ignore limits */ |
198 |
|
|
199 |
< |
while ((d = nextssamp(sr, si)) != 0.0) { |
200 |
< |
sr->rsrc = si->sn; /* remember source */ |
201 |
< |
srcp = source + si->sn; |
202 |
< |
if (srcp->sflags & SDISTANT) { |
203 |
< |
if (srcp->sflags & SSPOT && spotout(sr, srcp->sl.s)) |
204 |
< |
continue; |
205 |
< |
return(1); /* sample OK */ |
206 |
< |
} |
199 |
> |
if (r == NULL) |
200 |
> |
sr->rmax = 0.0; |
201 |
> |
|
202 |
> |
while ((d = nextssamp(sr, si)) != 0.0) { |
203 |
> |
sr->rsrc = si->sn; /* remember source */ |
204 |
> |
srcp = source + si->sn; |
205 |
> |
if (srcp->sflags & SDISTANT) { |
206 |
> |
if (srcp->sflags & SSPOT && spotout(sr, srcp->sl.s)) |
207 |
> |
continue; |
208 |
> |
return(1); /* sample OK */ |
209 |
> |
} |
210 |
|
/* local source */ |
211 |
|
/* check proximity */ |
212 |
< |
if (srcp->sflags & SPROX && d > srcp->sl.prox) |
193 |
< |
continue; |
194 |
< |
/* check angle */ |
195 |
< |
if (srcp->sflags & SSPOT) { |
196 |
< |
if (spotout(sr, srcp->sl.s)) |
212 |
> |
if (srcp->sflags & SPROX && d > srcp->sl.prox) |
213 |
|
continue; |
214 |
+ |
/* check angle */ |
215 |
+ |
if (srcp->sflags & SSPOT) { |
216 |
+ |
if (spotout(sr, srcp->sl.s)) |
217 |
+ |
continue; |
218 |
|
/* adjust solid angle */ |
219 |
< |
si->dom *= d*d; |
220 |
< |
d += srcp->sl.s->flen; |
221 |
< |
si->dom /= d*d; |
219 |
> |
si->dom *= d*d; |
220 |
> |
d += srcp->sl.s->flen; |
221 |
> |
si->dom /= d*d; |
222 |
> |
} |
223 |
> |
return(1); /* sample OK */ |
224 |
|
} |
225 |
< |
return(1); /* sample OK */ |
204 |
< |
} |
205 |
< |
return(0); /* no more samples */ |
225 |
> |
return(0); /* no more samples */ |
226 |
|
} |
227 |
|
|
228 |
|
|
229 |
< |
extern void |
229 |
> |
void |
230 |
|
srcvalue( /* punch ray to source and compute value */ |
231 |
< |
register RAY *r |
231 |
> |
RAY *r |
232 |
|
) |
233 |
|
{ |
234 |
< |
register SRCREC *sp; |
234 |
> |
SRCREC *sp; |
235 |
|
|
236 |
|
sp = &source[r->rsrc]; |
237 |
|
if (sp->sflags & SVIRTUAL) { /* virtual source */ |
283 |
|
} |
284 |
|
|
285 |
|
|
286 |
< |
extern int |
286 |
> |
int |
287 |
|
sourcehit( /* check to see if ray hit distant source */ |
288 |
< |
register RAY *r |
288 |
> |
RAY *r |
289 |
|
) |
290 |
|
{ |
291 |
|
int glowsrc = -1; |
292 |
|
int transrc = -1; |
293 |
|
int first, last; |
294 |
< |
register int i; |
294 |
> |
int i; |
295 |
|
|
296 |
|
if (r->rsrc >= 0) { /* check only one if aimed */ |
297 |
|
first = last = r->rsrc; |
316 |
|
* If it's a glow or transparent illum, just remember it. |
317 |
|
*/ |
318 |
|
if (source[i].sflags & SSKIP) { |
319 |
< |
glowsrc = i; |
319 |
> |
if (glowsrc < 0) |
320 |
> |
glowsrc = i; |
321 |
|
continue; |
322 |
|
} |
323 |
|
if (transillum(source[i].so->omod)) { |
324 |
< |
transrc = i; |
324 |
> |
if (transrc < 0) |
325 |
> |
transrc = i; |
326 |
|
continue; |
327 |
|
} |
328 |
|
r->ro = source[i].so; /* otherwise, use first hit */ |
359 |
|
const void *p2 |
360 |
|
) |
361 |
|
{ |
362 |
< |
register const CNTPTR *sc1 = (const CNTPTR *)p1; |
363 |
< |
register const CNTPTR *sc2 = (const CNTPTR *)p2; |
362 |
> |
const CNTPTR *sc1 = (const CNTPTR *)p1; |
363 |
> |
const CNTPTR *sc2 = (const CNTPTR *)p2; |
364 |
|
|
365 |
|
if (sc1->brt > sc2->brt) |
366 |
|
return(-1); |
370 |
|
} |
371 |
|
|
372 |
|
|
373 |
< |
extern void |
373 |
> |
void |
374 |
|
direct( /* add direct component */ |
375 |
|
RAY *r, /* ray that hit surface */ |
376 |
|
srcdirf_t *f, /* direct component coefficient function */ |
377 |
|
void *p /* data for f */ |
378 |
|
) |
379 |
|
{ |
380 |
< |
register int sn; |
381 |
< |
register CONTRIB *scp; |
380 |
> |
int sn; |
381 |
> |
CONTRIB *scp; |
382 |
|
SRCINDEX si; |
383 |
|
int nshadcheck, ncnts; |
384 |
|
int nhits; |
385 |
|
double prob, ourthresh, hwt; |
386 |
|
RAY sr; |
387 |
+ |
|
388 |
+ |
/* PMAP: Factor in direct photons (primarily for debugging/validation) */ |
389 |
+ |
if (directPhotonMapping) { |
390 |
+ |
(*f)(r -> rcol, p, r -> ron, PI); |
391 |
+ |
multDirectPmap(r); |
392 |
+ |
return; |
393 |
+ |
} |
394 |
+ |
|
395 |
|
/* NOTE: srccnt and cntord global so no recursion */ |
396 |
|
if (nsources <= 0) |
397 |
|
return; /* no sources?! */ |
412 |
|
scp->sno = sr.rsrc; |
413 |
|
/* compute coefficient */ |
414 |
|
(*f)(scp->coef, p, sr.rdir, si.dom); |
415 |
< |
cntord[sn].brt = bright(scp->coef); |
415 |
> |
cntord[sn].brt = intens(scp->coef); |
416 |
|
if (cntord[sn].brt <= 0.0) |
417 |
|
continue; |
418 |
|
#if SHADCACHE |
423 |
|
} |
424 |
|
#endif |
425 |
|
VCOPY(scp->dir, sr.rdir); |
426 |
+ |
copycolor(sr.rcoef, scp->coef); |
427 |
|
/* compute potential */ |
428 |
|
sr.revf = srcvalue; |
429 |
|
rayvalue(&sr); |
430 |
+ |
multcolor(sr.rcol, sr.rcoef); |
431 |
|
copycolor(scp->val, sr.rcol); |
432 |
< |
multcolor(scp->val, scp->coef); |
401 |
< |
cntord[sn].brt = bright(scp->val); |
432 |
> |
cntord[sn].brt = bright(sr.rcol); |
433 |
|
} |
434 |
|
/* sort contributions */ |
435 |
|
qsort(cntord, sn, sizeof(CNTPTR), cntcmp); |
436 |
|
{ /* find last */ |
437 |
< |
register int l, m; |
437 |
> |
int l, m; |
438 |
|
|
439 |
|
ncnts = l = sn; |
440 |
|
sn = 0; |
454 |
|
/* compute number to check */ |
455 |
|
nshadcheck = pow((double)ncnts, shadcert) + .5; |
456 |
|
/* modify threshold */ |
457 |
< |
ourthresh = shadthresh / r->rweight; |
457 |
> |
if (ncnts > MINSHADCNT) |
458 |
> |
ourthresh = shadthresh / r->rweight; |
459 |
> |
else |
460 |
> |
ourthresh = 0; |
461 |
|
/* test for shadows */ |
462 |
|
for (nhits = 0, hwt = 0.0, sn = 0; sn < ncnts; |
463 |
|
hwt += (double)source[scp->sno].nhits / |
470 |
|
break; |
471 |
|
scp = srccnt + cntord[sn].sndx; |
472 |
|
/* test for hit */ |
473 |
< |
rayorigin(&sr, r, SHADOW, 1.0); |
473 |
> |
rayorigin(&sr, SHADOW, r, NULL); |
474 |
> |
copycolor(sr.rcoef, scp->coef); |
475 |
|
VCOPY(sr.rdir, scp->dir); |
476 |
|
sr.rsrc = scp->sno; |
477 |
|
/* keep statistics */ |
484 |
|
source[scp->sno].sflags & SFOLLOW )) { |
485 |
|
/* follow entire path */ |
486 |
|
raycont(&sr); |
452 |
– |
rayparticipate(&sr); |
487 |
|
if (trace != NULL) |
488 |
|
(*trace)(&sr); /* trace execution */ |
489 |
|
if (bright(sr.rcol) <= FTINY) { |
495 |
|
#endif |
496 |
|
continue; /* missed! */ |
497 |
|
} |
498 |
+ |
rayparticipate(&sr); |
499 |
+ |
multcolor(sr.rcol, sr.rcoef); |
500 |
|
copycolor(scp->val, sr.rcol); |
501 |
< |
multcolor(scp->val, scp->coef); |
501 |
> |
} else if (trace != NULL && |
502 |
> |
(source[scp->sno].sflags & (SDISTANT|SVIRTUAL|SFOLLOW)) |
503 |
> |
== (SDISTANT|SFOLLOW) && |
504 |
> |
sourcehit(&sr) && rayshade(&sr, sr.ro->omod)) { |
505 |
> |
(*trace)(&sr); /* trace execution */ |
506 |
> |
/* skip call to rayparticipate() & scp->val update */ |
507 |
|
} |
508 |
|
/* add contribution if hit */ |
509 |
|
addcolor(r->rcol, scp->val); |
525 |
|
scp = srccnt + cntord[sn].sndx; |
526 |
|
prob = hwt * (double)source[scp->sno].nhits / |
527 |
|
(double)source[scp->sno].ntests; |
528 |
< |
if (prob > 1.0) |
529 |
< |
prob = 1.0; |
489 |
< |
scalecolor(scp->val, prob); |
528 |
> |
if (prob < 1.0) |
529 |
> |
scalecolor(scp->val, prob); |
530 |
|
addcolor(r->rcol, scp->val); |
531 |
|
} |
532 |
|
} |
533 |
|
|
534 |
|
|
535 |
< |
extern void |
535 |
> |
void |
536 |
|
srcscatter( /* compute source scattering into ray */ |
537 |
< |
register RAY *r |
537 |
> |
RAY *r |
538 |
|
) |
539 |
|
{ |
540 |
|
int oldsampndx; |
543 |
|
SRCINDEX si; |
544 |
|
double t, d; |
545 |
|
double re, ge, be; |
546 |
< |
COLOR cvext; |
546 |
> |
COLOR cvext, pmapInscatter; |
547 |
|
int i, j; |
548 |
|
|
549 |
+ |
/* PMAP: do unconditional inscattering for volume photons ? */ |
550 |
+ |
/* if (!volumePhotonMapping) */ |
551 |
|
if (r->slights == NULL || r->slights[0] == 0 |
552 |
|
|| r->gecc >= 1.-FTINY || r->rot >= FHUGE) |
553 |
|
return; |
554 |
+ |
|
555 |
|
if (ssampdist <= FTINY || (nsamps = r->rot/ssampdist + .5) < 1) |
556 |
|
nsamps = 1; |
557 |
|
#if MAXSSAMP |
576 |
|
sr.rorg[0] = r->rorg[0] + r->rdir[0]*t; |
577 |
|
sr.rorg[1] = r->rorg[1] + r->rdir[1]*t; |
578 |
|
sr.rorg[2] = r->rorg[2] + r->rdir[2]*t; |
536 |
– |
sr.rmax = 0.; |
579 |
|
initsrcindex(&si); /* sample ray to this source */ |
580 |
|
si.sn = r->slights[i]; |
581 |
|
nopart(&si, &sr); |
606 |
|
} |
607 |
|
/* other factors */ |
608 |
|
d *= si.dom * r->rot / (4.*PI*nsamps); |
609 |
+ |
scalecolor(sr.rcol, d); |
610 |
+ |
|
611 |
+ |
/* PMAP: Add ambient inscattering from volume photons once only */ |
612 |
+ |
if (volumePhotonMapping && i == 1) { |
613 |
+ |
inscatterVolumePmap(&sr, pmapInscatter); |
614 |
+ |
scalecolor(pmapInscatter, r -> rot / nsamps); |
615 |
+ |
addcolor(sr.rcol, pmapInscatter); |
616 |
+ |
} |
617 |
+ |
|
618 |
|
multcolor(sr.rcol, r->cext); |
619 |
|
multcolor(sr.rcol, r->albedo); |
569 |
– |
scalecolor(sr.rcol, d); |
620 |
|
multcolor(sr.rcol, cvext); |
621 |
|
addcolor(r->rcol, sr.rcol); /* add it in */ |
622 |
|
} |
683 |
|
* The same is true for stray specular samples, since the specular |
684 |
|
* contribution from light sources is calculated separately. |
685 |
|
*/ |
686 |
< |
|
687 |
< |
#define badcomponent(m, r) (r->crtype&(AMBIENT|SPECULAR) && \ |
686 |
> |
/* PMAP: Also avoid counting sources via transferred ambient rays (e.g. |
687 |
> |
* through glass) when photon mapping is enabled, as these indirect |
688 |
> |
* components are already accounted for. |
689 |
> |
*/ |
690 |
> |
#define badcomponent(m, r) (srcRayInPmap(r) || \ |
691 |
> |
(r->crtype&(AMBIENT|SPECULAR) && \ |
692 |
|
!(r->crtype&SHADOW || r->rod < 0.0 || \ |
693 |
< |
/* not 100% correct */ distglow(m, r, r->rot))) |
693 |
> |
/* not 100% correct */ distglow(m, r, r->rot)))) |
694 |
|
|
695 |
|
/* passillum * |
696 |
|
* |
712 |
|
distglow(m, r, raydist(r,PRIMARY))) |
713 |
|
|
714 |
|
|
715 |
< |
extern int |
715 |
> |
int |
716 |
|
m_light( /* ray hit a light source */ |
717 |
< |
register OBJREC *m, |
718 |
< |
register RAY *r |
717 |
> |
OBJREC *m, |
718 |
> |
RAY *r |
719 |
|
) |
720 |
|
{ |
721 |
|
/* check for over-counting */ |
722 |
< |
if (badcomponent(m, r)) |
722 |
> |
if (badcomponent(m, r)) { |
723 |
> |
setcolor(r->rcoef, 0.0, 0.0, 0.0); |
724 |
|
return(1); |
725 |
< |
if (wrongsource(m, r)) |
725 |
> |
} |
726 |
> |
if (wrongsource(m, r)) { |
727 |
> |
setcolor(r->rcoef, 0.0, 0.0, 0.0); |
728 |
|
return(1); |
729 |
+ |
} |
730 |
|
/* check for passed illum */ |
731 |
|
if (passillum(m, r)) { |
732 |
|
if (m->oargs.nsargs && strcmp(m->oargs.sarg[0], VOIDID)) |
734 |
|
raytrans(r); |
735 |
|
return(1); |
736 |
|
} |
737 |
+ |
/* check for invisibility */ |
738 |
+ |
if (srcignore(m, r)) { |
739 |
+ |
setcolor(r->rcoef, 0.0, 0.0, 0.0); |
740 |
+ |
return(1); |
741 |
+ |
} |
742 |
|
/* otherwise treat as source */ |
743 |
|
/* check for behind */ |
744 |
|
if (r->rod < 0.0) |
682 |
– |
return(1); |
683 |
– |
/* check for invisibility */ |
684 |
– |
if (srcignore(m, r)) |
745 |
|
return(1); |
746 |
|
/* check for outside spot */ |
747 |
|
if (m->otype==MAT_SPOT && spotout(r, makespot(m))) |