9 |
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10 |
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#include "ray.h" |
11 |
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#include "otypes.h" |
12 |
+ |
#include "otspecial.h" |
13 |
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#include "rtotypes.h" |
14 |
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#include "source.h" |
15 |
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#include "random.h" |
15 |
– |
#include "pmap.h" |
16 |
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#include "pmapsrc.h" |
17 |
+ |
#include "pmapmat.h" |
18 |
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|
19 |
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#ifndef MAXSSAMP |
20 |
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#define MAXSSAMP 16 /* maximum samples per ray */ |
43 |
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static int cntcmp(const void *p1, const void *p2); |
44 |
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|
45 |
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|
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) { |
50 |
– |
OBJECT aobj; |
51 |
– |
OBJREC *ao; |
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)) |
57 |
– |
return(ao); |
58 |
– |
if (ao->otype == MOD_ALIAS) { |
59 |
– |
o = ao; |
60 |
– |
continue; |
61 |
– |
} |
62 |
– |
} |
63 |
– |
if (o->omod == OVOID) |
64 |
– |
return(NULL); |
65 |
– |
o = objptr(o->omod); |
66 |
– |
} |
67 |
– |
return(o); /* mixtures will return NULL */ |
68 |
– |
} |
69 |
– |
|
70 |
– |
|
46 |
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void |
47 |
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marksources(void) /* find and mark source objects */ |
48 |
|
{ |
117 |
|
return; |
118 |
|
} |
119 |
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#if SHADCACHE |
120 |
< |
initobscache(ns); |
120 |
> |
for (ns = 0; ns < nsources; ns++) /* initialize obstructor cache */ |
121 |
> |
initobscache(ns); |
122 |
|
#endif |
123 |
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/* PMAP: disable virtual sources */ |
124 |
|
if (!photonMapping) |
518 |
|
SRCINDEX si; |
519 |
|
double t, d; |
520 |
|
double re, ge, be; |
521 |
< |
COLOR cvext, pmapInscatter; |
521 |
> |
COLOR cvext; |
522 |
|
int i, j; |
523 |
|
|
524 |
< |
/* PMAP: do unconditional inscattering for volume photons ? */ |
525 |
< |
/* if (!volumePhotonMapping) */ |
526 |
< |
if (r->slights == NULL || r->slights[0] == 0 |
527 |
< |
|| r->gecc >= 1.-FTINY || r->rot >= FHUGE) |
524 |
> |
if (r->rot >= FHUGE || r->gecc >= 1.-FTINY) |
525 |
> |
return; /* this can never work */ |
526 |
> |
/* PMAP: do unconditional inscattering for volume photons */ |
527 |
> |
if (!volumePhotonMapping && (r->slights == NULL || r->slights[0] == 0)) |
528 |
|
return; |
529 |
|
|
530 |
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if (ssampdist <= FTINY || (nsamps = r->rot/ssampdist + .5) < 1) |
535 |
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#endif |
536 |
|
oldsampndx = samplendx; |
537 |
|
samplendx = random()&0x7fff; /* randomize */ |
538 |
< |
for (i = r->slights[0]; i > 0; i--) { /* for each source */ |
538 |
> |
for (i = volumePhotonMapping ? 1 : r->slights[0]; i > 0; i--) { |
539 |
> |
/* for each source OR once if volume photon map enabled */ |
540 |
|
for (j = 0; j < nsamps; j++) { /* for each sample position */ |
541 |
|
samplendx++; |
542 |
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t = r->rot * (j+frandom())/nsamps; |
552 |
|
sr.rorg[0] = r->rorg[0] + r->rdir[0]*t; |
553 |
|
sr.rorg[1] = r->rorg[1] + r->rdir[1]*t; |
554 |
|
sr.rorg[2] = r->rorg[2] + r->rdir[2]*t; |
555 |
< |
initsrcindex(&si); /* sample ray to this source */ |
556 |
< |
si.sn = r->slights[i]; |
557 |
< |
nopart(&si, &sr); |
558 |
< |
if (!srcray(&sr, NULL, &si) || |
559 |
< |
sr.rsrc != r->slights[i]) |
560 |
< |
continue; /* no path */ |
555 |
> |
|
556 |
> |
if (!volumePhotonMapping) { |
557 |
> |
initsrcindex(&si); /* sample ray to this source */ |
558 |
> |
si.sn = r->slights[i]; |
559 |
> |
nopart(&si, &sr); |
560 |
> |
if (!srcray(&sr, NULL, &si) || |
561 |
> |
sr.rsrc != r->slights[i]) |
562 |
> |
continue; /* no path */ |
563 |
|
#if SHADCACHE |
564 |
< |
if (srcblocked(&sr)) /* check shadow cache */ |
565 |
< |
continue; |
564 |
> |
if (srcblocked(&sr)) /* check shadow cache */ |
565 |
> |
continue; |
566 |
|
#endif |
567 |
< |
copycolor(sr.cext, r->cext); |
568 |
< |
copycolor(sr.albedo, r->albedo); |
569 |
< |
sr.gecc = r->gecc; |
570 |
< |
sr.slights = r->slights; |
571 |
< |
rayvalue(&sr); /* eval. source ray */ |
572 |
< |
if (bright(sr.rcol) <= FTINY) { |
567 |
> |
copycolor(sr.cext, r->cext); |
568 |
> |
copycolor(sr.albedo, r->albedo); |
569 |
> |
sr.gecc = r->gecc; |
570 |
> |
sr.slights = r->slights; |
571 |
> |
rayvalue(&sr); /* eval. source ray */ |
572 |
> |
if (bright(sr.rcol) <= FTINY) { |
573 |
|
#if SHADCACHE |
574 |
< |
srcblocker(&sr); /* add blocker to cache */ |
574 |
> |
srcblocker(&sr); /* add blocker to cache */ |
575 |
|
#endif |
576 |
< |
continue; |
577 |
< |
} |
578 |
< |
if (r->gecc <= FTINY) /* compute P(theta) */ |
579 |
< |
d = 1.; |
580 |
< |
else { |
581 |
< |
d = DOT(r->rdir, sr.rdir); |
582 |
< |
d = 1. + r->gecc*r->gecc - 2.*r->gecc*d; |
583 |
< |
d = (1. - r->gecc*r->gecc) / (d*sqrt(d)); |
584 |
< |
} |
576 |
> |
continue; |
577 |
> |
} |
578 |
> |
if (r->gecc <= FTINY) /* compute P(theta) */ |
579 |
> |
d = 1.; |
580 |
> |
else { |
581 |
> |
d = DOT(r->rdir, sr.rdir); |
582 |
> |
d = 1. + r->gecc*r->gecc - 2.*r->gecc*d; |
583 |
> |
d = (1. - r->gecc*r->gecc) / (d*sqrt(d)); |
584 |
> |
} |
585 |
|
/* other factors */ |
586 |
< |
d *= si.dom * r->rot / (4.*PI*nsamps); |
587 |
< |
scalecolor(sr.rcol, d); |
588 |
< |
|
589 |
< |
/* PMAP: Add ambient inscattering from volume photons once only */ |
590 |
< |
if (volumePhotonMapping && i == 1) { |
591 |
< |
inscatterVolumePmap(&sr, pmapInscatter); |
592 |
< |
scalecolor(pmapInscatter, r -> rot / nsamps); |
593 |
< |
addcolor(sr.rcol, pmapInscatter); |
594 |
< |
} |
595 |
< |
|
586 |
> |
d *= si.dom * r->rot / (4.*PI*nsamps); |
587 |
> |
scalecolor(sr.rcol, d); |
588 |
> |
} else { |
589 |
> |
/* PMAP: Add ambient inscattering from |
590 |
> |
* volume photons; note we reverse the |
591 |
> |
* incident ray direction since we're |
592 |
> |
* now in *backward* raytracing mode! */ |
593 |
> |
sr.rdir [0] = -r -> rdir [0]; |
594 |
> |
sr.rdir [1] = -r -> rdir [1]; |
595 |
> |
sr.rdir [2] = -r -> rdir [2]; |
596 |
> |
sr.gecc = r -> gecc; |
597 |
> |
inscatterVolumePmap(&sr, sr.rcol); |
598 |
> |
scalecolor(sr.rcol, r -> rot / nsamps); |
599 |
> |
} |
600 |
|
multcolor(sr.rcol, r->cext); |
601 |
|
multcolor(sr.rcol, r->albedo); |
602 |
|
multcolor(sr.rcol, cvext); |
665 |
|
* The same is true for stray specular samples, since the specular |
666 |
|
* contribution from light sources is calculated separately. |
667 |
|
*/ |
668 |
< |
|
669 |
< |
#define badcomponent(m, r) (r->crtype&(AMBIENT|SPECULAR) && \ |
668 |
> |
/* PMAP: Also avoid counting sources via transferred ambient rays (e.g. |
669 |
> |
* through glass) when photon mapping is enabled, as these indirect |
670 |
> |
* components are already accounted for. |
671 |
> |
*/ |
672 |
> |
#define badcomponent(m, r) (srcRayInPmap(r) || \ |
673 |
> |
(r->crtype&(AMBIENT|SPECULAR) && \ |
674 |
|
!(r->crtype&SHADOW || r->rod < 0.0 || \ |
675 |
< |
/* not 100% correct */ distglow(m, r, r->rot))) |
675 |
> |
/* not 100% correct */ distglow(m, r, r->rot)))) |
676 |
|
|
677 |
|
/* passillum * |
678 |
|
* |