12 |
|
#include "rtotypes.h" |
13 |
|
#include "source.h" |
14 |
|
#include "random.h" |
15 |
+ |
#include "pmapsrc.h" |
16 |
+ |
#include "pmapmat.h" |
17 |
|
|
18 |
|
#ifndef MAXSSAMP |
19 |
|
#define MAXSSAMP 16 /* maximum samples per ray */ |
135 |
|
source[ns].sflags |= SSKIP; |
136 |
|
} |
137 |
|
} |
136 |
– |
#if SHADCACHE |
137 |
– |
initobscache(ns); |
138 |
– |
#endif |
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)); |
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?! */ |
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); |
594 |
– |
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 |
|
* |