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) { |
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 */ |
99 |
|
m->otype == MAT_SPOT ? 7 : 3)) |
100 |
|
objerror(m, USER, "bad # arguments"); |
101 |
|
|
102 |
– |
if (m->otype == MAT_GLOW && |
103 |
– |
o->otype != OBJ_SOURCE && |
104 |
– |
m->oargs.farg[3] <= FTINY) |
105 |
– |
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 |
136 |
< |
initobscache(ns); |
137 |
< |
#endif |
138 |
< |
if (!(source[ns].sflags & SSKIP)) |
139 |
< |
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; |
195 |
> |
SRCREC *srcp; |
196 |
|
|
197 |
|
rayorigin(sr, SHADOW, r, NULL); /* ignore limits */ |
198 |
|
|
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; |
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?! */ |
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 / |
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; |
546 |
|
COLOR cvext; |
547 |
|
int i, j; |
548 |
|
|
549 |
< |
if (r->slights == NULL || r->slights[0] == 0 |
550 |
< |
|| r->gecc >= 1.-FTINY || r->rot >= FHUGE) |
549 |
> |
if (r->rot >= FHUGE || r->gecc >= 1.-FTINY) |
550 |
> |
return; /* this can never work */ |
551 |
> |
/* PMAP: do unconditional inscattering for volume photons */ |
552 |
> |
if (!volumePhotonMapping && (r->slights == NULL || r->slights[0] == 0)) |
553 |
|
return; |
554 |
+ |
|
555 |
|
if (ssampdist <= FTINY || (nsamps = r->rot/ssampdist + .5) < 1) |
556 |
|
nsamps = 1; |
557 |
|
#if MAXSSAMP |
560 |
|
#endif |
561 |
|
oldsampndx = samplendx; |
562 |
|
samplendx = random()&0x7fff; /* randomize */ |
563 |
< |
for (i = r->slights[0]; i > 0; i--) { /* for each source */ |
563 |
> |
for (i = volumePhotonMapping ? 1 : r->slights[0]; i > 0; i--) { |
564 |
> |
/* for each source OR once if volume photon map enabled */ |
565 |
|
for (j = 0; j < nsamps; j++) { /* for each sample position */ |
566 |
|
samplendx++; |
567 |
|
t = r->rot * (j+frandom())/nsamps; |
577 |
|
sr.rorg[0] = r->rorg[0] + r->rdir[0]*t; |
578 |
|
sr.rorg[1] = r->rorg[1] + r->rdir[1]*t; |
579 |
|
sr.rorg[2] = r->rorg[2] + r->rdir[2]*t; |
580 |
< |
initsrcindex(&si); /* sample ray to this source */ |
581 |
< |
si.sn = r->slights[i]; |
582 |
< |
nopart(&si, &sr); |
583 |
< |
if (!srcray(&sr, NULL, &si) || |
584 |
< |
sr.rsrc != r->slights[i]) |
585 |
< |
continue; /* no path */ |
580 |
> |
|
581 |
> |
if (!volumePhotonMapping) { |
582 |
> |
initsrcindex(&si); /* sample ray to this source */ |
583 |
> |
si.sn = r->slights[i]; |
584 |
> |
nopart(&si, &sr); |
585 |
> |
if (!srcray(&sr, NULL, &si) || |
586 |
> |
sr.rsrc != r->slights[i]) |
587 |
> |
continue; /* no path */ |
588 |
|
#if SHADCACHE |
589 |
< |
if (srcblocked(&sr)) /* check shadow cache */ |
590 |
< |
continue; |
589 |
> |
if (srcblocked(&sr)) /* check shadow cache */ |
590 |
> |
continue; |
591 |
|
#endif |
592 |
< |
copycolor(sr.cext, r->cext); |
593 |
< |
copycolor(sr.albedo, r->albedo); |
594 |
< |
sr.gecc = r->gecc; |
595 |
< |
sr.slights = r->slights; |
596 |
< |
rayvalue(&sr); /* eval. source ray */ |
597 |
< |
if (bright(sr.rcol) <= FTINY) { |
592 |
> |
copycolor(sr.cext, r->cext); |
593 |
> |
copycolor(sr.albedo, r->albedo); |
594 |
> |
sr.gecc = r->gecc; |
595 |
> |
sr.slights = r->slights; |
596 |
> |
rayvalue(&sr); /* eval. source ray */ |
597 |
> |
if (bright(sr.rcol) <= FTINY) { |
598 |
|
#if SHADCACHE |
599 |
< |
srcblocker(&sr); /* add blocker to cache */ |
599 |
> |
srcblocker(&sr); /* add blocker to cache */ |
600 |
|
#endif |
601 |
< |
continue; |
602 |
< |
} |
603 |
< |
if (r->gecc <= FTINY) /* compute P(theta) */ |
604 |
< |
d = 1.; |
605 |
< |
else { |
606 |
< |
d = DOT(r->rdir, sr.rdir); |
607 |
< |
d = 1. + r->gecc*r->gecc - 2.*r->gecc*d; |
608 |
< |
d = (1. - r->gecc*r->gecc) / (d*sqrt(d)); |
609 |
< |
} |
601 |
> |
continue; |
602 |
> |
} |
603 |
> |
if (r->gecc <= FTINY) /* compute P(theta) */ |
604 |
> |
d = 1.; |
605 |
> |
else { |
606 |
> |
d = DOT(r->rdir, sr.rdir); |
607 |
> |
d = 1. + r->gecc*r->gecc - 2.*r->gecc*d; |
608 |
> |
d = (1. - r->gecc*r->gecc) / (d*sqrt(d)); |
609 |
> |
} |
610 |
|
/* other factors */ |
611 |
< |
d *= si.dom * r->rot / (4.*PI*nsamps); |
611 |
> |
d *= si.dom * r->rot / (4.*PI*nsamps); |
612 |
> |
scalecolor(sr.rcol, d); |
613 |
> |
} else { |
614 |
> |
/* PMAP: Add ambient inscattering from |
615 |
> |
* volume photons; note we reverse the |
616 |
> |
* incident ray direction since we're |
617 |
> |
* now in *backward* raytracing mode! */ |
618 |
> |
sr.rdir [0] = -r -> rdir [0]; |
619 |
> |
sr.rdir [1] = -r -> rdir [1]; |
620 |
> |
sr.rdir [2] = -r -> rdir [2]; |
621 |
> |
sr.gecc = r -> gecc; |
622 |
> |
inscatterVolumePmap(&sr, sr.rcol); |
623 |
> |
scalecolor(sr.rcol, r -> rot / nsamps); |
624 |
> |
} |
625 |
|
multcolor(sr.rcol, r->cext); |
626 |
|
multcolor(sr.rcol, r->albedo); |
590 |
– |
scalecolor(sr.rcol, d); |
627 |
|
multcolor(sr.rcol, cvext); |
628 |
|
addcolor(r->rcol, sr.rcol); /* add it in */ |
629 |
|
} |
690 |
|
* The same is true for stray specular samples, since the specular |
691 |
|
* contribution from light sources is calculated separately. |
692 |
|
*/ |
693 |
< |
|
694 |
< |
#define badcomponent(m, r) (r->crtype&(AMBIENT|SPECULAR) && \ |
693 |
> |
/* PMAP: Also avoid counting sources via transferred ambient rays (e.g. |
694 |
> |
* through glass) when photon mapping is enabled, as these indirect |
695 |
> |
* components are already accounted for. |
696 |
> |
*/ |
697 |
> |
#define badcomponent(m, r) (srcRayInPmap(r) || \ |
698 |
> |
(r->crtype&(AMBIENT|SPECULAR) && \ |
699 |
|
!(r->crtype&SHADOW || r->rod < 0.0 || \ |
700 |
< |
/* not 100% correct */ distglow(m, r, r->rot))) |
700 |
> |
/* not 100% correct */ distglow(m, r, r->rot)))) |
701 |
|
|
702 |
|
/* passillum * |
703 |
|
* |
719 |
|
distglow(m, r, raydist(r,PRIMARY))) |
720 |
|
|
721 |
|
|
722 |
< |
extern int |
722 |
> |
int |
723 |
|
m_light( /* ray hit a light source */ |
724 |
< |
register OBJREC *m, |
725 |
< |
register RAY *r |
724 |
> |
OBJREC *m, |
725 |
> |
RAY *r |
726 |
|
) |
727 |
|
{ |
728 |
|
/* check for over-counting */ |