| 543 |
|
SRCINDEX si; |
| 544 |
|
double t, d; |
| 545 |
|
double re, ge, be; |
| 546 |
< |
COLOR cvext, pmapInscatter; |
| 546 |
> |
COLOR cvext; |
| 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) |
| 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) |
| 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); |
| 612 |
< |
scalecolor(sr.rcol, d); |
| 613 |
< |
|
| 614 |
< |
/* PMAP: Add ambient inscattering from volume photons once only */ |
| 615 |
< |
if (volumePhotonMapping && i == 1) { |
| 616 |
< |
inscatterVolumePmap(&sr, pmapInscatter); |
| 617 |
< |
scalecolor(pmapInscatter, r -> rot / nsamps); |
| 618 |
< |
addcolor(sr.rcol, pmapInscatter); |
| 619 |
< |
} |
| 620 |
< |
|
| 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); |
| 627 |
|
multcolor(sr.rcol, cvext); |
