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" |
15 |
– |
#include "pmap.h" |
16 |
|
#include "pmapsrc.h" |
17 |
+ |
#include "pmapmat.h" |
18 |
|
|
19 |
|
#ifndef MAXSSAMP |
20 |
|
#define MAXSSAMP 16 /* maximum samples per ray */ |
36 |
|
float brt; /* brightness (for comparison) */ |
37 |
|
} CNTPTR; /* contribution pointer */ |
38 |
|
|
39 |
< |
static CONTRIB *srccnt; /* source contributions in direct() */ |
40 |
< |
static CNTPTR *cntord; /* source ordering in direct() */ |
39 |
> |
static CONTRIB *srccnt = NULL; /* source contributions in direct() */ |
40 |
> |
static CNTPTR *cntord = NULL; /* source ordering in direct() */ |
41 |
|
static int maxcntr = 0; /* size of contribution arrays */ |
42 |
|
|
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 |
|
{ |
49 |
< |
int foundsource = 0; |
49 |
> |
int indirect = 0; |
50 |
|
int i; |
51 |
|
OBJREC *o, *m; |
52 |
|
int ns; |
53 |
+ |
/* call us only once! */ |
54 |
+ |
if (nsources) |
55 |
+ |
error(CONSISTENCY, "Multiple calls to marksources!"); |
56 |
|
/* initialize dispatch table */ |
57 |
|
initstypes(); |
58 |
|
/* find direct sources */ |
63 |
|
if (!issurface(o->otype) || o->omod == OVOID) |
64 |
|
continue; |
65 |
|
/* find material */ |
66 |
< |
m = findmaterial(objptr(o->omod)); |
66 |
> |
m = findmaterial(o); |
67 |
|
if (m == NULL) |
68 |
|
continue; |
69 |
|
if (m->otype == MAT_CLIP) { |
77 |
|
m->otype == MAT_SPOT ? 7 : 3)) |
78 |
|
objerror(m, USER, "bad # arguments"); |
79 |
|
|
80 |
< |
if (m->oargs.farg[0] <= FTINY && m->oargs.farg[1] <= FTINY && |
81 |
< |
m->oargs.farg[2] <= FTINY) |
80 |
> |
if (m->oargs.farg[0] <= FTINY && (m->oargs.farg[1] <= FTINY) & |
81 |
> |
(m->oargs.farg[2] <= FTINY)) |
82 |
|
continue; /* don't bother */ |
83 |
|
if (m->otype == MAT_GLOW && |
84 |
|
o->otype != OBJ_SOURCE && |
85 |
|
m->oargs.farg[3] <= FTINY) { |
86 |
< |
foundsource += (ambounce > 0); |
86 |
> |
indirect += (ambounce > 0); |
87 |
|
continue; /* don't track these */ |
88 |
|
} |
89 |
|
if (sfun[o->otype].of == NULL || |
100 |
|
source[ns].sl.prox = m->oargs.farg[3]; |
101 |
|
if (source[ns].sflags & SDISTANT) { |
102 |
|
source[ns].sflags |= SSKIP; |
103 |
< |
foundsource += (ambounce > 0); |
103 |
> |
indirect += (ambounce > 0); |
104 |
|
} |
105 |
|
} else if (m->otype == MAT_SPOT) { |
106 |
+ |
if (source[ns].sflags & SDISTANT) |
107 |
+ |
objerror(o, WARNING, |
108 |
+ |
"distant source is a spotlight"); |
109 |
|
source[ns].sflags |= SSPOT; |
110 |
|
if ((source[ns].sl.s = makespot(m)) == NULL) |
111 |
|
goto memerr; |
116 |
|
source[ns].sflags |= SSKIP; |
117 |
|
} |
118 |
|
} |
119 |
< |
foundsource += !(source[ns].sflags & SSKIP); |
119 |
> |
maxcntr += !(source[ns].sflags & SSKIP); |
120 |
|
} |
121 |
< |
if (!foundsource) { |
122 |
< |
error(WARNING, "no light sources found"); |
123 |
< |
return; |
121 |
> |
if (!maxcntr) { |
122 |
> |
if (!indirect) |
123 |
> |
error(WARNING, "no light sources found"); |
124 |
> |
return; /* no direct calculation, it seems */ |
125 |
|
} |
126 |
|
#if SHADCACHE |
127 |
< |
initobscache(ns); |
127 |
> |
for (ns = 0; ns < nsources; ns++) /* initialize obstructor cache */ |
128 |
> |
initobscache(ns); |
129 |
|
#endif |
130 |
|
/* PMAP: disable virtual sources */ |
131 |
|
if (!photonMapping) |
132 |
|
markvirtuals(); /* find and add virtual sources */ |
133 |
|
|
134 |
|
/* allocate our contribution arrays */ |
135 |
< |
maxcntr = nsources + MAXSPART; /* start with this many */ |
135 |
> |
maxcntr += MAXSPART; /* start with this many */ |
136 |
|
srccnt = (CONTRIB *)malloc(maxcntr*sizeof(CONTRIB)); |
137 |
|
cntord = (CNTPTR *)malloc(maxcntr*sizeof(CNTPTR)); |
138 |
< |
if ((srccnt == NULL) | (cntord == NULL)) |
139 |
< |
goto memerr; |
157 |
< |
return; |
138 |
> |
if ((srccnt != NULL) & (cntord != NULL)) |
139 |
> |
return; |
140 |
|
memerr: |
141 |
|
error(SYSTEM, "out of memory in marksources"); |
142 |
|
} |
143 |
|
|
144 |
|
|
145 |
|
void |
146 |
+ |
distantsources(void) /* only mark distant sources */ |
147 |
+ |
{ |
148 |
+ |
int i; |
149 |
+ |
OBJREC *o, *m; |
150 |
+ |
int ns; |
151 |
+ |
/* call us only once! */ |
152 |
+ |
if (nsources) |
153 |
+ |
error(CONSISTENCY, "Multiple calls to distantsources!"); |
154 |
+ |
/* initialize dispatch table */ |
155 |
+ |
initstypes(); |
156 |
+ |
/* sources needed for sourcehit() */ |
157 |
+ |
for (i = 0; i < nsceneobjs; i++) { |
158 |
+ |
|
159 |
+ |
o = objptr(i); |
160 |
+ |
|
161 |
+ |
if ((o->otype != OBJ_SOURCE) | (o->omod == OVOID)) |
162 |
+ |
continue; |
163 |
+ |
/* find material */ |
164 |
+ |
m = findmaterial(o); |
165 |
+ |
if (m == NULL) |
166 |
+ |
continue; |
167 |
+ |
if (!islight(m->otype)) |
168 |
+ |
continue; /* not source modifier */ |
169 |
+ |
|
170 |
+ |
if (m->oargs.nfargs != (m->otype == MAT_GLOW ? 4 : |
171 |
+ |
m->otype == MAT_SPOT ? 7 : 3)) |
172 |
+ |
objerror(m, USER, "bad # arguments"); |
173 |
+ |
|
174 |
+ |
if (m->oargs.farg[0] <= FTINY && (m->oargs.farg[1] <= FTINY) & |
175 |
+ |
(m->oargs.farg[2] <= FTINY)) |
176 |
+ |
continue; /* don't bother */ |
177 |
+ |
if (sfun[o->otype].of == NULL || |
178 |
+ |
sfun[o->otype].of->setsrc == NULL) |
179 |
+ |
objerror(o, USER, "illegal material"); |
180 |
+ |
|
181 |
+ |
if ((ns = newsource()) < 0) |
182 |
+ |
error(SYSTEM, "out of memory in distantsources"); |
183 |
+ |
|
184 |
+ |
setsource(&source[ns], o); |
185 |
+ |
|
186 |
+ |
if (m->otype == MAT_GLOW) { |
187 |
+ |
source[ns].sflags |= SPROX|SSKIP; |
188 |
+ |
source[ns].sl.prox = m->oargs.farg[3]; |
189 |
+ |
} else if (m->otype == MAT_SPOT) |
190 |
+ |
objerror(o, WARNING, "distant source is a spotlight"); |
191 |
+ |
} |
192 |
+ |
} |
193 |
+ |
|
194 |
+ |
|
195 |
+ |
void |
196 |
|
freesources(void) /* free all source structures */ |
197 |
|
{ |
198 |
|
if (nsources > 0) { |
301 |
|
|
302 |
|
static int |
303 |
|
transillum( /* check if material is transparent illum */ |
304 |
< |
OBJECT obj |
304 |
> |
OBJREC *m |
305 |
|
) |
306 |
|
{ |
307 |
< |
OBJREC *m = findmaterial(objptr(obj)); |
276 |
< |
|
307 |
> |
m = findmaterial(m); |
308 |
|
if (m == NULL) |
309 |
|
return(1); |
310 |
|
if (m->otype != MAT_ILLUM) |
337 |
|
*/ |
338 |
|
if (2.*PI*(1. - DOT(source[i].sloc,r->rdir)) > source[i].ss2) |
339 |
|
continue; |
340 |
< |
/* is it the only possibility? */ |
341 |
< |
if (first == last) { |
340 |
> |
/* is it what we aimed for? */ |
341 |
> |
if (i == r->rsrc) { |
342 |
|
r->ro = source[i].so; |
343 |
|
break; |
344 |
|
} |
350 |
|
glowsrc = i; |
351 |
|
continue; |
352 |
|
} |
353 |
< |
if (transillum(source[i].so->omod)) { |
353 |
> |
if (transillum(source[i].so)) { |
354 |
|
if (transrc < 0) |
355 |
|
transrc = i; |
356 |
|
continue; |
370 |
|
return(0); /* nothing usable */ |
371 |
|
} |
372 |
|
/* |
373 |
< |
* Make assignments. |
373 |
> |
* Assign object index |
374 |
|
*/ |
375 |
|
r->robj = objndx(r->ro); |
345 |
– |
for (i = 0; i < 3; i++) |
346 |
– |
r->ron[i] = -r->rdir[i]; |
347 |
– |
r->rod = 1.0; |
348 |
– |
r->pert[0] = r->pert[1] = r->pert[2] = 0.0; |
349 |
– |
r->uv[0] = r->uv[1] = 0.0; |
350 |
– |
r->rox = NULL; |
376 |
|
return(1); |
377 |
|
} |
378 |
|
|
415 |
|
multDirectPmap(r); |
416 |
|
return; |
417 |
|
} |
393 |
– |
|
418 |
|
/* NOTE: srccnt and cntord global so no recursion */ |
419 |
< |
if (nsources <= 0) |
420 |
< |
return; /* no sources?! */ |
421 |
< |
/* potential contributions */ |
422 |
< |
initsrcindex(&si); |
419 |
> |
if (maxcntr <= 0) |
420 |
> |
return; /* no direct?! */ |
421 |
> |
|
422 |
> |
initsrcindex(&si); /* potential contributions */ |
423 |
|
for (sn = 0; srcray(&sr, r, &si); sn++) { |
424 |
|
if (sn >= maxcntr) { |
425 |
|
maxcntr = sn + MAXSPART; |
433 |
|
cntord[sn].sndx = sn; |
434 |
|
scp = srccnt + sn; |
435 |
|
scp->sno = sr.rsrc; |
436 |
< |
/* compute coefficient */ |
413 |
< |
(*f)(scp->coef, p, sr.rdir, si.dom); |
414 |
< |
cntord[sn].brt = intens(scp->coef); |
415 |
< |
if (cntord[sn].brt <= 0.0) |
416 |
< |
continue; |
417 |
< |
#if SHADCACHE |
418 |
< |
/* check shadow cache */ |
436 |
> |
#if SHADCACHE /* check shadow cache */ |
437 |
|
if (si.np == 1 && srcblocked(&sr)) { |
438 |
|
cntord[sn].brt = 0.0; |
439 |
|
continue; |
440 |
|
} |
441 |
|
#endif |
442 |
+ |
/* compute coefficient */ |
443 |
+ |
(*f)(scp->coef, p, sr.rdir, si.dom); |
444 |
+ |
cntord[sn].brt = intens(scp->coef); |
445 |
+ |
if (cntord[sn].brt <= 0.0) |
446 |
+ |
continue; |
447 |
|
VCOPY(scp->dir, sr.rdir); |
448 |
|
copycolor(sr.rcoef, scp->coef); |
449 |
|
/* compute potential */ |
476 |
|
/* compute number to check */ |
477 |
|
nshadcheck = pow((double)ncnts, shadcert) + .5; |
478 |
|
/* modify threshold */ |
479 |
< |
if (ncnts > MINSHADCNT) |
457 |
< |
ourthresh = shadthresh / r->rweight; |
458 |
< |
else |
459 |
< |
ourthresh = 0; |
479 |
> |
ourthresh = shadthresh / r->rweight; |
480 |
|
/* test for shadows */ |
481 |
|
for (nhits = 0, hwt = 0.0, sn = 0; sn < ncnts; |
482 |
|
hwt += (double)source[scp->sno].nhits / |
483 |
|
(double)source[scp->sno].ntests, |
484 |
|
sn++) { |
485 |
|
/* check threshold */ |
486 |
< |
if ((sn+nshadcheck>=ncnts ? cntord[sn].brt : |
486 |
> |
if (sn >= MINSHADCNT && |
487 |
> |
(sn+nshadcheck>=ncnts ? cntord[sn].brt : |
488 |
|
cntord[sn].brt-cntord[sn+nshadcheck].brt) |
489 |
< |
< ourthresh*bright(r->rcol)) |
489 |
> |
< ourthresh*bright(r->rcol)) |
490 |
|
break; |
491 |
|
scp = srccnt + cntord[sn].sndx; |
492 |
|
/* test for hit */ |
563 |
|
SRCINDEX si; |
564 |
|
double t, d; |
565 |
|
double re, ge, be; |
566 |
< |
COLOR cvext, pmapInscatter; |
566 |
> |
COLOR cvext; |
567 |
|
int i, j; |
568 |
|
|
569 |
< |
/* PMAP: do unconditional inscattering for volume photons ? */ |
570 |
< |
/* if (!volumePhotonMapping) */ |
571 |
< |
if (r->slights == NULL || r->slights[0] == 0 |
572 |
< |
|| r->gecc >= 1.-FTINY || r->rot >= FHUGE) |
569 |
> |
if (r->rot >= FHUGE*.99 || r->gecc >= 1.-FTINY) |
570 |
> |
return; /* this can never work */ |
571 |
> |
/* PMAP: do unconditional inscattering for volume photons */ |
572 |
> |
if (!volumePhotonMapping && (r->slights == NULL || r->slights[0] == 0)) |
573 |
|
return; |
574 |
|
|
575 |
|
if (ssampdist <= FTINY || (nsamps = r->rot/ssampdist + .5) < 1) |
580 |
|
#endif |
581 |
|
oldsampndx = samplendx; |
582 |
|
samplendx = random()&0x7fff; /* randomize */ |
583 |
< |
for (i = r->slights[0]; i > 0; i--) { /* for each source */ |
583 |
> |
for (i = volumePhotonMapping ? 1 : r->slights[0]; i > 0; i--) { |
584 |
> |
/* for each source OR once if volume photon map enabled */ |
585 |
|
for (j = 0; j < nsamps; j++) { /* for each sample position */ |
586 |
|
samplendx++; |
587 |
|
t = r->rot * (j+frandom())/nsamps; |
597 |
|
sr.rorg[0] = r->rorg[0] + r->rdir[0]*t; |
598 |
|
sr.rorg[1] = r->rorg[1] + r->rdir[1]*t; |
599 |
|
sr.rorg[2] = r->rorg[2] + r->rdir[2]*t; |
600 |
< |
initsrcindex(&si); /* sample ray to this source */ |
601 |
< |
si.sn = r->slights[i]; |
602 |
< |
nopart(&si, &sr); |
603 |
< |
if (!srcray(&sr, NULL, &si) || |
604 |
< |
sr.rsrc != r->slights[i]) |
605 |
< |
continue; /* no path */ |
600 |
> |
|
601 |
> |
if (!volumePhotonMapping) { |
602 |
> |
initsrcindex(&si); /* sample ray to this source */ |
603 |
> |
si.sn = r->slights[i]; |
604 |
> |
nopart(&si, &sr); |
605 |
> |
if (!srcray(&sr, NULL, &si) || |
606 |
> |
sr.rsrc != r->slights[i]) |
607 |
> |
continue; /* no path */ |
608 |
|
#if SHADCACHE |
609 |
< |
if (srcblocked(&sr)) /* check shadow cache */ |
610 |
< |
continue; |
609 |
> |
if (srcblocked(&sr)) /* check shadow cache */ |
610 |
> |
continue; |
611 |
|
#endif |
612 |
< |
copycolor(sr.cext, r->cext); |
613 |
< |
copycolor(sr.albedo, r->albedo); |
614 |
< |
sr.gecc = r->gecc; |
615 |
< |
sr.slights = r->slights; |
616 |
< |
rayvalue(&sr); /* eval. source ray */ |
617 |
< |
if (bright(sr.rcol) <= FTINY) { |
612 |
> |
copycolor(sr.cext, r->cext); |
613 |
> |
copycolor(sr.albedo, r->albedo); |
614 |
> |
sr.gecc = r->gecc; |
615 |
> |
sr.slights = r->slights; |
616 |
> |
rayvalue(&sr); /* eval. source ray */ |
617 |
> |
if (bright(sr.rcol) <= FTINY) { |
618 |
|
#if SHADCACHE |
619 |
< |
srcblocker(&sr); /* add blocker to cache */ |
619 |
> |
srcblocker(&sr); /* add blocker to cache */ |
620 |
|
#endif |
621 |
< |
continue; |
622 |
< |
} |
623 |
< |
if (r->gecc <= FTINY) /* compute P(theta) */ |
624 |
< |
d = 1.; |
625 |
< |
else { |
626 |
< |
d = DOT(r->rdir, sr.rdir); |
627 |
< |
d = 1. + r->gecc*r->gecc - 2.*r->gecc*d; |
628 |
< |
d = (1. - r->gecc*r->gecc) / (d*sqrt(d)); |
629 |
< |
} |
621 |
> |
continue; |
622 |
> |
} |
623 |
> |
if (r->gecc <= FTINY) /* compute P(theta) */ |
624 |
> |
d = 1.; |
625 |
> |
else { |
626 |
> |
d = DOT(r->rdir, sr.rdir); |
627 |
> |
d = 1. + r->gecc*r->gecc - 2.*r->gecc*d; |
628 |
> |
d = (1. - r->gecc*r->gecc) / (d*sqrt(d)); |
629 |
> |
} |
630 |
|
/* other factors */ |
631 |
< |
d *= si.dom * r->rot / (4.*PI*nsamps); |
632 |
< |
scalecolor(sr.rcol, d); |
633 |
< |
|
634 |
< |
/* PMAP: Add ambient inscattering from volume photons once only */ |
635 |
< |
if (volumePhotonMapping && i == 1) { |
636 |
< |
inscatterVolumePmap(&sr, pmapInscatter); |
637 |
< |
scalecolor(pmapInscatter, r -> rot / nsamps); |
638 |
< |
addcolor(sr.rcol, pmapInscatter); |
639 |
< |
} |
640 |
< |
|
631 |
> |
d *= si.dom * r->rot / (4.*PI*nsamps); |
632 |
> |
scalecolor(sr.rcol, d); |
633 |
> |
} else { |
634 |
> |
/* PMAP: Add ambient inscattering from |
635 |
> |
* volume photons; note we reverse the |
636 |
> |
* incident ray direction since we're |
637 |
> |
* now in *backward* raytracing mode! */ |
638 |
> |
sr.rdir [0] = -r -> rdir [0]; |
639 |
> |
sr.rdir [1] = -r -> rdir [1]; |
640 |
> |
sr.rdir [2] = -r -> rdir [2]; |
641 |
> |
sr.gecc = r -> gecc; |
642 |
> |
inscatterVolumePmap(&sr, sr.rcol); |
643 |
> |
scalecolor(sr.rcol, r -> rot / nsamps); |
644 |
> |
} |
645 |
|
multcolor(sr.rcol, r->cext); |
646 |
|
multcolor(sr.rcol, r->albedo); |
647 |
|
multcolor(sr.rcol, cvext); |
669 |
|
*/ |
670 |
|
|
671 |
|
static int |
672 |
< |
weaksrcmat(OBJECT obj) /* identify material */ |
672 |
> |
weaksrcmat(OBJREC *m) /* identify material */ |
673 |
|
{ |
674 |
< |
OBJREC *m = findmaterial(objptr(obj)); |
647 |
< |
|
674 |
> |
m = findmaterial(m); |
675 |
|
if (m == NULL) return(0); |
676 |
|
return((m->otype==MAT_ILLUM) | (m->otype==MAT_GLOW)); |
677 |
|
} |
678 |
|
|
679 |
|
#define illumblock(m, r) (!(source[r->rsrc].sflags&SVIRTUAL) && \ |
680 |
|
r->rod > 0.0 && \ |
681 |
< |
weaksrcmat(source[r->rsrc].so->omod)) |
681 |
> |
weaksrcmat(source[r->rsrc].so)) |
682 |
|
|
683 |
|
/* wrongsource * |
684 |
|
* |
709 |
|
* The same is true for stray specular samples, since the specular |
710 |
|
* contribution from light sources is calculated separately. |
711 |
|
*/ |
712 |
< |
|
713 |
< |
#define badcomponent(m, r) (r->crtype&(AMBIENT|SPECULAR) && \ |
712 |
> |
/* PMAP: Also avoid counting sources via transferred ambient rays (e.g. |
713 |
> |
* through glass) when photon mapping is enabled, as these indirect |
714 |
> |
* components are already accounted for. |
715 |
> |
*/ |
716 |
> |
#define badcomponent(m, r) (srcRayInPmap(r) || \ |
717 |
> |
(r->crtype&(AMBIENT|SPECULAR) && \ |
718 |
|
!(r->crtype&SHADOW || r->rod < 0.0 || \ |
719 |
< |
/* not 100% correct */ distglow(m, r, r->rot))) |
719 |
> |
/* not 100% correct */ distglow(m, r, r->rot)))) |
720 |
|
|
721 |
|
/* passillum * |
722 |
|
* |