12 |
|
#include "rtotypes.h" |
13 |
|
#include "source.h" |
14 |
|
#include "random.h" |
15 |
– |
#include "pmap.h" |
15 |
|
#include "pmapsrc.h" |
16 |
+ |
#include "pmapmat.h" |
17 |
|
|
18 |
|
#ifndef MAXSSAMP |
19 |
|
#define MAXSSAMP 16 /* maximum samples per ray */ |
52 |
|
aobj = lastmod(objndx(o), o->oargs.sarg[0]); |
53 |
|
if (aobj < 0) |
54 |
|
objerror(o, USER, "bad reference"); |
55 |
< |
ao = objptr(aobj); |
56 |
< |
if (ismaterial(ao->otype)) |
55 |
> |
/* recursive check on alias branch */ |
56 |
> |
if ((ao = findmaterial(objptr(aobj))) != NULL) |
57 |
|
return(ao); |
58 |
– |
if (ao->otype == MOD_ALIAS) { |
59 |
– |
o = ao; |
60 |
– |
continue; |
61 |
– |
} |
58 |
|
} |
59 |
|
if (o->omod == OVOID) |
60 |
|
return(NULL); |
539 |
|
SRCINDEX si; |
540 |
|
double t, d; |
541 |
|
double re, ge, be; |
542 |
< |
COLOR cvext, pmapInscatter; |
542 |
> |
COLOR cvext; |
543 |
|
int i, j; |
544 |
|
|
545 |
< |
/* PMAP: do unconditional inscattering for volume photons ? */ |
546 |
< |
/* if (!volumePhotonMapping) */ |
547 |
< |
if (r->slights == NULL || r->slights[0] == 0 |
548 |
< |
|| r->gecc >= 1.-FTINY || r->rot >= FHUGE) |
545 |
> |
if (r->rot >= FHUGE || r->gecc >= 1.-FTINY) |
546 |
> |
return; /* this can never work */ |
547 |
> |
/* PMAP: do unconditional inscattering for volume photons */ |
548 |
> |
if (!volumePhotonMapping && (r->slights == NULL || r->slights[0] == 0)) |
549 |
|
return; |
550 |
|
|
551 |
|
if (ssampdist <= FTINY || (nsamps = r->rot/ssampdist + .5) < 1) |
556 |
|
#endif |
557 |
|
oldsampndx = samplendx; |
558 |
|
samplendx = random()&0x7fff; /* randomize */ |
559 |
< |
for (i = r->slights[0]; i > 0; i--) { /* for each source */ |
559 |
> |
for (i = volumePhotonMapping ? 1 : r->slights[0]; i > 0; i--) { |
560 |
> |
/* for each source OR once if volume photon map enabled */ |
561 |
|
for (j = 0; j < nsamps; j++) { /* for each sample position */ |
562 |
|
samplendx++; |
563 |
|
t = r->rot * (j+frandom())/nsamps; |
573 |
|
sr.rorg[0] = r->rorg[0] + r->rdir[0]*t; |
574 |
|
sr.rorg[1] = r->rorg[1] + r->rdir[1]*t; |
575 |
|
sr.rorg[2] = r->rorg[2] + r->rdir[2]*t; |
576 |
< |
initsrcindex(&si); /* sample ray to this source */ |
577 |
< |
si.sn = r->slights[i]; |
578 |
< |
nopart(&si, &sr); |
579 |
< |
if (!srcray(&sr, NULL, &si) || |
580 |
< |
sr.rsrc != r->slights[i]) |
581 |
< |
continue; /* no path */ |
576 |
> |
|
577 |
> |
if (!volumePhotonMapping) { |
578 |
> |
initsrcindex(&si); /* sample ray to this source */ |
579 |
> |
si.sn = r->slights[i]; |
580 |
> |
nopart(&si, &sr); |
581 |
> |
if (!srcray(&sr, NULL, &si) || |
582 |
> |
sr.rsrc != r->slights[i]) |
583 |
> |
continue; /* no path */ |
584 |
|
#if SHADCACHE |
585 |
< |
if (srcblocked(&sr)) /* check shadow cache */ |
586 |
< |
continue; |
585 |
> |
if (srcblocked(&sr)) /* check shadow cache */ |
586 |
> |
continue; |
587 |
|
#endif |
588 |
< |
copycolor(sr.cext, r->cext); |
589 |
< |
copycolor(sr.albedo, r->albedo); |
590 |
< |
sr.gecc = r->gecc; |
591 |
< |
sr.slights = r->slights; |
592 |
< |
rayvalue(&sr); /* eval. source ray */ |
593 |
< |
if (bright(sr.rcol) <= FTINY) { |
588 |
> |
copycolor(sr.cext, r->cext); |
589 |
> |
copycolor(sr.albedo, r->albedo); |
590 |
> |
sr.gecc = r->gecc; |
591 |
> |
sr.slights = r->slights; |
592 |
> |
rayvalue(&sr); /* eval. source ray */ |
593 |
> |
if (bright(sr.rcol) <= FTINY) { |
594 |
|
#if SHADCACHE |
595 |
< |
srcblocker(&sr); /* add blocker to cache */ |
595 |
> |
srcblocker(&sr); /* add blocker to cache */ |
596 |
|
#endif |
597 |
< |
continue; |
598 |
< |
} |
599 |
< |
if (r->gecc <= FTINY) /* compute P(theta) */ |
600 |
< |
d = 1.; |
601 |
< |
else { |
602 |
< |
d = DOT(r->rdir, sr.rdir); |
603 |
< |
d = 1. + r->gecc*r->gecc - 2.*r->gecc*d; |
604 |
< |
d = (1. - r->gecc*r->gecc) / (d*sqrt(d)); |
605 |
< |
} |
597 |
> |
continue; |
598 |
> |
} |
599 |
> |
if (r->gecc <= FTINY) /* compute P(theta) */ |
600 |
> |
d = 1.; |
601 |
> |
else { |
602 |
> |
d = DOT(r->rdir, sr.rdir); |
603 |
> |
d = 1. + r->gecc*r->gecc - 2.*r->gecc*d; |
604 |
> |
d = (1. - r->gecc*r->gecc) / (d*sqrt(d)); |
605 |
> |
} |
606 |
|
/* other factors */ |
607 |
< |
d *= si.dom * r->rot / (4.*PI*nsamps); |
608 |
< |
scalecolor(sr.rcol, d); |
609 |
< |
|
610 |
< |
/* PMAP: Add ambient inscattering from volume photons once only */ |
611 |
< |
if (volumePhotonMapping && i == 1) { |
612 |
< |
inscatterVolumePmap(&sr, pmapInscatter); |
613 |
< |
scalecolor(pmapInscatter, r -> rot / nsamps); |
614 |
< |
addcolor(sr.rcol, pmapInscatter); |
615 |
< |
} |
616 |
< |
|
607 |
> |
d *= si.dom * r->rot / (4.*PI*nsamps); |
608 |
> |
scalecolor(sr.rcol, d); |
609 |
> |
} else { |
610 |
> |
/* PMAP: Add ambient inscattering from |
611 |
> |
* volume photons; note we reverse the |
612 |
> |
* incident ray direction since we're |
613 |
> |
* now in *backward* raytracing mode! */ |
614 |
> |
sr.rdir [0] = -r -> rdir [0]; |
615 |
> |
sr.rdir [1] = -r -> rdir [1]; |
616 |
> |
sr.rdir [2] = -r -> rdir [2]; |
617 |
> |
sr.gecc = r -> gecc; |
618 |
> |
inscatterVolumePmap(&sr, sr.rcol); |
619 |
> |
scalecolor(sr.rcol, r -> rot / nsamps); |
620 |
> |
} |
621 |
|
multcolor(sr.rcol, r->cext); |
622 |
|
multcolor(sr.rcol, r->albedo); |
623 |
|
multcolor(sr.rcol, cvext); |
686 |
|
* The same is true for stray specular samples, since the specular |
687 |
|
* contribution from light sources is calculated separately. |
688 |
|
*/ |
689 |
< |
|
690 |
< |
#define badcomponent(m, r) (r->crtype&(AMBIENT|SPECULAR) && \ |
689 |
> |
/* PMAP: Also avoid counting sources via transferred ambient rays (e.g. |
690 |
> |
* through glass) when photon mapping is enabled, as these indirect |
691 |
> |
* components are already accounted for. |
692 |
> |
*/ |
693 |
> |
#define badcomponent(m, r) (srcRayInPmap(r) || \ |
694 |
> |
(r->crtype&(AMBIENT|SPECULAR) && \ |
695 |
|
!(r->crtype&SHADOW || r->rod < 0.0 || \ |
696 |
< |
/* not 100% correct */ distglow(m, r, r->rot))) |
696 |
> |
/* not 100% correct */ distglow(m, r, r->rot)))) |
697 |
|
|
698 |
|
/* passillum * |
699 |
|
* |