| 9 |
|
|
| 10 |
|
#include "ray.h" |
| 11 |
|
#include "otypes.h" |
| 12 |
+ |
#include "otspecial.h" |
| 13 |
|
#include "rtotypes.h" |
| 14 |
|
#include "source.h" |
| 15 |
|
#include "random.h" |
| 43 |
|
static int cntcmp(const void *p1, const void *p2); |
| 44 |
|
|
| 45 |
|
|
| 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 |
|
void |
| 47 |
|
marksources(void) /* find and mark source objects */ |
| 48 |
|
{ |
| 74 |
|
m->otype == MAT_SPOT ? 7 : 3)) |
| 75 |
|
objerror(m, USER, "bad # arguments"); |
| 76 |
|
|
| 77 |
< |
if (m->oargs.farg[0] <= FTINY && m->oargs.farg[1] <= FTINY && |
| 78 |
< |
m->oargs.farg[2] <= FTINY) |
| 77 |
> |
if (m->oargs.farg[0] <= FTINY && (m->oargs.farg[1] <= FTINY) & |
| 78 |
> |
(m->oargs.farg[2] <= FTINY)) |
| 79 |
|
continue; /* don't bother */ |
| 80 |
|
if (m->otype == MAT_GLOW && |
| 81 |
|
o->otype != OBJ_SOURCE && |
| 100 |
|
foundsource += (ambounce > 0); |
| 101 |
|
} |
| 102 |
|
} else if (m->otype == MAT_SPOT) { |
| 103 |
+ |
if (source[ns].sflags & SDISTANT) |
| 104 |
+ |
objerror(o, WARNING, |
| 105 |
+ |
"distant source is a spotlight"); |
| 106 |
|
source[ns].sflags |= SSPOT; |
| 107 |
|
if ((source[ns].sl.s = makespot(m)) == NULL) |
| 108 |
|
goto memerr; |
| 131 |
|
maxcntr = nsources + MAXSPART; /* start with this many */ |
| 132 |
|
srccnt = (CONTRIB *)malloc(maxcntr*sizeof(CONTRIB)); |
| 133 |
|
cntord = (CNTPTR *)malloc(maxcntr*sizeof(CNTPTR)); |
| 134 |
< |
if ((srccnt == NULL) | (cntord == NULL)) |
| 135 |
< |
goto memerr; |
| 158 |
< |
return; |
| 134 |
> |
if ((srccnt != NULL) & (cntord != NULL)) |
| 135 |
> |
return; |
| 136 |
|
memerr: |
| 137 |
|
error(SYSTEM, "out of memory in marksources"); |
| 138 |
|
} |
| 139 |
|
|
| 140 |
|
|
| 141 |
|
void |
| 142 |
+ |
distantsources(void) /* only mark distant sources */ |
| 143 |
+ |
{ |
| 144 |
+ |
int i; |
| 145 |
+ |
OBJREC *o, *m; |
| 146 |
+ |
int ns; |
| 147 |
+ |
/* initialize dispatch table */ |
| 148 |
+ |
initstypes(); |
| 149 |
+ |
/* sources needed for sourcehit() */ |
| 150 |
+ |
for (i = 0; i < nsceneobjs; i++) { |
| 151 |
+ |
|
| 152 |
+ |
o = objptr(i); |
| 153 |
+ |
|
| 154 |
+ |
if ((o->otype != OBJ_SOURCE) | (o->omod == OVOID)) |
| 155 |
+ |
continue; |
| 156 |
+ |
/* find material */ |
| 157 |
+ |
m = findmaterial(objptr(o->omod)); |
| 158 |
+ |
if (m == NULL) |
| 159 |
+ |
continue; |
| 160 |
+ |
if (!islight(m->otype)) |
| 161 |
+ |
continue; /* not source modifier */ |
| 162 |
+ |
|
| 163 |
+ |
if (m->oargs.nfargs != (m->otype == MAT_GLOW ? 4 : |
| 164 |
+ |
m->otype == MAT_SPOT ? 7 : 3)) |
| 165 |
+ |
objerror(m, USER, "bad # arguments"); |
| 166 |
+ |
|
| 167 |
+ |
if (m->oargs.farg[0] <= FTINY && (m->oargs.farg[1] <= FTINY) & |
| 168 |
+ |
(m->oargs.farg[2] <= FTINY)) |
| 169 |
+ |
continue; /* don't bother */ |
| 170 |
+ |
if (sfun[o->otype].of == NULL || |
| 171 |
+ |
sfun[o->otype].of->setsrc == NULL) |
| 172 |
+ |
objerror(o, USER, "illegal material"); |
| 173 |
+ |
|
| 174 |
+ |
if ((ns = newsource()) < 0) |
| 175 |
+ |
error(SYSTEM, "out of memory in distantsources"); |
| 176 |
+ |
|
| 177 |
+ |
setsource(&source[ns], o); |
| 178 |
+ |
|
| 179 |
+ |
if (m->otype == MAT_GLOW) { |
| 180 |
+ |
source[ns].sflags |= SPROX|SSKIP; |
| 181 |
+ |
source[ns].sl.prox = m->oargs.farg[3]; |
| 182 |
+ |
} else if (m->otype == MAT_SPOT) |
| 183 |
+ |
objerror(o, WARNING, "distant source is a spotlight"); |
| 184 |
+ |
} |
| 185 |
+ |
} |
| 186 |
+ |
|
| 187 |
+ |
|
| 188 |
+ |
void |
| 189 |
|
freesources(void) /* free all source structures */ |
| 190 |
|
{ |
| 191 |
|
if (nsources > 0) { |
| 434 |
|
cntord[sn].sndx = sn; |
| 435 |
|
scp = srccnt + sn; |
| 436 |
|
scp->sno = sr.rsrc; |
| 437 |
< |
/* compute coefficient */ |
| 414 |
< |
(*f)(scp->coef, p, sr.rdir, si.dom); |
| 415 |
< |
cntord[sn].brt = intens(scp->coef); |
| 416 |
< |
if (cntord[sn].brt <= 0.0) |
| 417 |
< |
continue; |
| 418 |
< |
#if SHADCACHE |
| 419 |
< |
/* check shadow cache */ |
| 437 |
> |
#if SHADCACHE /* check shadow cache */ |
| 438 |
|
if (si.np == 1 && srcblocked(&sr)) { |
| 439 |
|
cntord[sn].brt = 0.0; |
| 440 |
|
continue; |
| 441 |
|
} |
| 442 |
|
#endif |
| 443 |
+ |
/* compute coefficient */ |
| 444 |
+ |
(*f)(scp->coef, p, sr.rdir, si.dom); |
| 445 |
+ |
cntord[sn].brt = intens(scp->coef); |
| 446 |
+ |
if (cntord[sn].brt <= 0.0) |
| 447 |
+ |
continue; |
| 448 |
|
VCOPY(scp->dir, sr.rdir); |
| 449 |
|
copycolor(sr.rcoef, scp->coef); |
| 450 |
|
/* compute potential */ |
| 477 |
|
/* compute number to check */ |
| 478 |
|
nshadcheck = pow((double)ncnts, shadcert) + .5; |
| 479 |
|
/* modify threshold */ |
| 480 |
< |
if (ncnts > MINSHADCNT) |
| 458 |
< |
ourthresh = shadthresh / r->rweight; |
| 459 |
< |
else |
| 460 |
< |
ourthresh = 0; |
| 480 |
> |
ourthresh = shadthresh / r->rweight; |
| 481 |
|
/* test for shadows */ |
| 482 |
|
for (nhits = 0, hwt = 0.0, sn = 0; sn < ncnts; |
| 483 |
|
hwt += (double)source[scp->sno].nhits / |
| 484 |
|
(double)source[scp->sno].ntests, |
| 485 |
|
sn++) { |
| 486 |
|
/* check threshold */ |
| 487 |
< |
if ((sn+nshadcheck>=ncnts ? cntord[sn].brt : |
| 487 |
> |
if (sn >= MINSHADCNT && |
| 488 |
> |
(sn+nshadcheck>=ncnts ? cntord[sn].brt : |
| 489 |
|
cntord[sn].brt-cntord[sn+nshadcheck].brt) |
| 490 |
< |
< ourthresh*bright(r->rcol)) |
| 490 |
> |
< ourthresh*bright(r->rcol)) |
| 491 |
|
break; |
| 492 |
|
scp = srccnt + cntord[sn].sndx; |
| 493 |
|
/* test for hit */ |
| 564 |
|
SRCINDEX si; |
| 565 |
|
double t, d; |
| 566 |
|
double re, ge, be; |
| 567 |
< |
COLOR cvext, pmapInscatter; |
| 567 |
> |
COLOR cvext; |
| 568 |
|
int i, j; |
| 569 |
|
|
| 570 |
< |
/* PMAP: do unconditional inscattering for volume photons ? */ |
| 571 |
< |
/* if (!volumePhotonMapping) */ |
| 572 |
< |
if (r->slights == NULL || r->slights[0] == 0 |
| 573 |
< |
|| r->gecc >= 1.-FTINY || r->rot >= FHUGE) |
| 570 |
> |
if (r->rot >= FHUGE*.99 || r->gecc >= 1.-FTINY) |
| 571 |
> |
return; /* this can never work */ |
| 572 |
> |
/* PMAP: do unconditional inscattering for volume photons */ |
| 573 |
> |
if (!volumePhotonMapping && (r->slights == NULL || r->slights[0] == 0)) |
| 574 |
|
return; |
| 575 |
|
|
| 576 |
|
if (ssampdist <= FTINY || (nsamps = r->rot/ssampdist + .5) < 1) |
| 581 |
|
#endif |
| 582 |
|
oldsampndx = samplendx; |
| 583 |
|
samplendx = random()&0x7fff; /* randomize */ |
| 584 |
< |
for (i = r->slights[0]; i > 0; i--) { /* for each source */ |
| 584 |
> |
for (i = volumePhotonMapping ? 1 : r->slights[0]; i > 0; i--) { |
| 585 |
> |
/* for each source OR once if volume photon map enabled */ |
| 586 |
|
for (j = 0; j < nsamps; j++) { /* for each sample position */ |
| 587 |
|
samplendx++; |
| 588 |
|
t = r->rot * (j+frandom())/nsamps; |
| 598 |
|
sr.rorg[0] = r->rorg[0] + r->rdir[0]*t; |
| 599 |
|
sr.rorg[1] = r->rorg[1] + r->rdir[1]*t; |
| 600 |
|
sr.rorg[2] = r->rorg[2] + r->rdir[2]*t; |
| 601 |
< |
initsrcindex(&si); /* sample ray to this source */ |
| 602 |
< |
si.sn = r->slights[i]; |
| 603 |
< |
nopart(&si, &sr); |
| 604 |
< |
if (!srcray(&sr, NULL, &si) || |
| 605 |
< |
sr.rsrc != r->slights[i]) |
| 606 |
< |
continue; /* no path */ |
| 601 |
> |
|
| 602 |
> |
if (!volumePhotonMapping) { |
| 603 |
> |
initsrcindex(&si); /* sample ray to this source */ |
| 604 |
> |
si.sn = r->slights[i]; |
| 605 |
> |
nopart(&si, &sr); |
| 606 |
> |
if (!srcray(&sr, NULL, &si) || |
| 607 |
> |
sr.rsrc != r->slights[i]) |
| 608 |
> |
continue; /* no path */ |
| 609 |
|
#if SHADCACHE |
| 610 |
< |
if (srcblocked(&sr)) /* check shadow cache */ |
| 611 |
< |
continue; |
| 610 |
> |
if (srcblocked(&sr)) /* check shadow cache */ |
| 611 |
> |
continue; |
| 612 |
|
#endif |
| 613 |
< |
copycolor(sr.cext, r->cext); |
| 614 |
< |
copycolor(sr.albedo, r->albedo); |
| 615 |
< |
sr.gecc = r->gecc; |
| 616 |
< |
sr.slights = r->slights; |
| 617 |
< |
rayvalue(&sr); /* eval. source ray */ |
| 618 |
< |
if (bright(sr.rcol) <= FTINY) { |
| 613 |
> |
copycolor(sr.cext, r->cext); |
| 614 |
> |
copycolor(sr.albedo, r->albedo); |
| 615 |
> |
sr.gecc = r->gecc; |
| 616 |
> |
sr.slights = r->slights; |
| 617 |
> |
rayvalue(&sr); /* eval. source ray */ |
| 618 |
> |
if (bright(sr.rcol) <= FTINY) { |
| 619 |
|
#if SHADCACHE |
| 620 |
< |
srcblocker(&sr); /* add blocker to cache */ |
| 620 |
> |
srcblocker(&sr); /* add blocker to cache */ |
| 621 |
|
#endif |
| 622 |
< |
continue; |
| 623 |
< |
} |
| 624 |
< |
if (r->gecc <= FTINY) /* compute P(theta) */ |
| 625 |
< |
d = 1.; |
| 626 |
< |
else { |
| 627 |
< |
d = DOT(r->rdir, sr.rdir); |
| 628 |
< |
d = 1. + r->gecc*r->gecc - 2.*r->gecc*d; |
| 629 |
< |
d = (1. - r->gecc*r->gecc) / (d*sqrt(d)); |
| 630 |
< |
} |
| 622 |
> |
continue; |
| 623 |
> |
} |
| 624 |
> |
if (r->gecc <= FTINY) /* compute P(theta) */ |
| 625 |
> |
d = 1.; |
| 626 |
> |
else { |
| 627 |
> |
d = DOT(r->rdir, sr.rdir); |
| 628 |
> |
d = 1. + r->gecc*r->gecc - 2.*r->gecc*d; |
| 629 |
> |
d = (1. - r->gecc*r->gecc) / (d*sqrt(d)); |
| 630 |
> |
} |
| 631 |
|
/* other factors */ |
| 632 |
< |
d *= si.dom * r->rot / (4.*PI*nsamps); |
| 633 |
< |
scalecolor(sr.rcol, d); |
| 634 |
< |
|
| 635 |
< |
/* PMAP: Add ambient inscattering from volume photons once only */ |
| 636 |
< |
if (volumePhotonMapping && i == 1) { |
| 637 |
< |
inscatterVolumePmap(&sr, pmapInscatter); |
| 638 |
< |
scalecolor(pmapInscatter, r -> rot / nsamps); |
| 639 |
< |
addcolor(sr.rcol, pmapInscatter); |
| 640 |
< |
} |
| 641 |
< |
|
| 632 |
> |
d *= si.dom * r->rot / (4.*PI*nsamps); |
| 633 |
> |
scalecolor(sr.rcol, d); |
| 634 |
> |
} else { |
| 635 |
> |
/* PMAP: Add ambient inscattering from |
| 636 |
> |
* volume photons; note we reverse the |
| 637 |
> |
* incident ray direction since we're |
| 638 |
> |
* now in *backward* raytracing mode! */ |
| 639 |
> |
sr.rdir [0] = -r -> rdir [0]; |
| 640 |
> |
sr.rdir [1] = -r -> rdir [1]; |
| 641 |
> |
sr.rdir [2] = -r -> rdir [2]; |
| 642 |
> |
sr.gecc = r -> gecc; |
| 643 |
> |
inscatterVolumePmap(&sr, sr.rcol); |
| 644 |
> |
scalecolor(sr.rcol, r -> rot / nsamps); |
| 645 |
> |
} |
| 646 |
|
multcolor(sr.rcol, r->cext); |
| 647 |
|
multcolor(sr.rcol, r->albedo); |
| 648 |
|
multcolor(sr.rcol, cvext); |
