14 |
|
#include "otypes.h" |
15 |
|
#include "otspecial.h" |
16 |
|
#include "random.h" |
17 |
+ |
#include "pmap.h" |
18 |
|
|
19 |
|
#define MAXCSET ((MAXSET+1)*2-1) /* maximum check set size */ |
20 |
|
|
51 |
|
setcolor(r->rcoef, 1., 1., 1.); |
52 |
|
} else { |
53 |
|
rw = intens(rc); |
54 |
+ |
if (rw > 1.0) |
55 |
+ |
rw = 1.0; /* avoid calculation growth */ |
56 |
|
if (rc != r->rcoef) |
57 |
|
copycolor(r->rcoef, rc); |
58 |
|
} |
68 |
|
r->gecc = seccg; |
69 |
|
r->slights = NULL; |
70 |
|
} else { /* spawned ray */ |
71 |
< |
if (ro->rot >= FHUGE) { |
71 |
> |
if (ro->rot >= FHUGE*.99) { |
72 |
|
memset(r, 0, sizeof(RAY)); |
73 |
|
return(-1); /* illegal continuation */ |
74 |
|
} |
109 |
|
return(-1); |
110 |
|
if (r->crtype & SHADOW) /* shadow commitment */ |
111 |
|
return(0); |
112 |
< |
if (maxdepth <= 0 && rc != NULL) { /* Russian roulette */ |
112 |
> |
/* ambient in photon map? */ |
113 |
> |
if (ro != NULL && ro->crtype & AMBIENT) { |
114 |
> |
if (causticPhotonMapping) |
115 |
> |
return(-1); |
116 |
> |
if (photonMapping && rt != TRANS) |
117 |
> |
return(-1); |
118 |
> |
} |
119 |
> |
if ((maxdepth <= 0) & (rc != NULL)) { /* Russian roulette */ |
120 |
|
if (minweight <= 0.0) |
121 |
|
error(USER, "zero ray weight in Russian roulette"); |
122 |
< |
if (maxdepth < 0 && r->rlvl > -maxdepth) |
122 |
> |
if ((maxdepth < 0) & (r->rlvl > -maxdepth)) |
123 |
|
return(-1); /* upper reflection limit */ |
124 |
|
if (r->rweight >= minweight) |
125 |
|
return(0); |
130 |
|
r->rweight = minweight; |
131 |
|
return(0); |
132 |
|
} |
133 |
< |
return(r->rweight >= minweight && r->rlvl <= abs(maxdepth) ? 0 : -1); |
133 |
> |
return((r->rweight >= minweight) & (r->rlvl <= abs(maxdepth)) ? 0 : -1); |
134 |
|
} |
135 |
|
|
136 |
|
|
145 |
|
r->robj = OVOID; |
146 |
|
r->ro = NULL; |
147 |
|
r->rox = NULL; |
148 |
< |
r->rt = r->rot = FHUGE; |
148 |
> |
r->rxt = r->rmt = r->rot = FHUGE; |
149 |
> |
VCOPY(r->rop, r->rorg); |
150 |
> |
r->ron[0] = -r->rdir[0]; r->ron[1] = -r->rdir[1]; r->ron[2] = -r->rdir[2]; |
151 |
> |
r->rod = 1.0; |
152 |
|
r->pert[0] = r->pert[1] = r->pert[2] = 0.0; |
153 |
+ |
r->rflips = 0; |
154 |
|
r->uv[0] = r->uv[1] = 0.0; |
155 |
|
setcolor(r->pcol, 1.0, 1.0, 1.0); |
156 |
+ |
setcolor(r->mcol, 0.0, 0.0, 0.0); |
157 |
|
setcolor(r->rcol, 0.0, 0.0, 0.0); |
158 |
|
} |
159 |
|
|
196 |
|
{ |
197 |
|
RAY tr; |
198 |
|
|
199 |
< |
if (rayorigin(&tr, TRANS, r, NULL) == 0) { |
200 |
< |
VCOPY(tr.rdir, r->rdir); |
201 |
< |
rayvalue(&tr); |
202 |
< |
copycolor(r->rcol, tr.rcol); |
203 |
< |
r->rt = r->rot + tr.rt; |
199 |
> |
rayorigin(&tr, TRANS, r, NULL); /* always continue */ |
200 |
> |
VCOPY(tr.rdir, r->rdir); |
201 |
> |
rayvalue(&tr); |
202 |
> |
copycolor(r->mcol, tr.mcol); |
203 |
> |
copycolor(r->rcol, tr.rcol); |
204 |
> |
r->rmt = r->rot + tr.rmt; |
205 |
> |
r->rxt = r->rot + tr.rxt; |
206 |
> |
} |
207 |
> |
|
208 |
> |
|
209 |
> |
int |
210 |
> |
raytirrad( /* irradiance hack */ |
211 |
> |
OBJREC *m, |
212 |
> |
RAY *r |
213 |
> |
) |
214 |
> |
{ |
215 |
> |
if (ofun[m->otype].flags & (T_M|T_X) && m->otype != MAT_CLIP) { |
216 |
> |
if (istransp(m->otype) || isBSDFproxy(m)) { |
217 |
> |
raytrans(r); |
218 |
> |
return(1); |
219 |
> |
} |
220 |
> |
if (!islight(m->otype)) |
221 |
> |
return((*ofun[Lamb.otype].funp)(&Lamb, r)); |
222 |
|
} |
223 |
+ |
return(0); /* not a qualifying surface */ |
224 |
|
} |
225 |
|
|
226 |
|
|
230 |
|
int mod |
231 |
|
) |
232 |
|
{ |
233 |
+ |
int tst_irrad = do_irrad && !(r->crtype & ~(PRIMARY|TRANS)); |
234 |
|
OBJREC *m; |
235 |
|
|
236 |
< |
r->rt = r->rot; /* set effective ray length */ |
236 |
> |
r->rxt = r->rot; /* preset effective ray length */ |
237 |
|
for ( ; mod != OVOID; mod = m->omod) { |
238 |
|
m = objptr(mod); |
239 |
|
/****** unnecessary test since modifier() is always called |
243 |
|
} |
244 |
|
******/ |
245 |
|
/* hack for irradiance calculation */ |
246 |
< |
if (do_irrad && !(r->crtype & ~(PRIMARY|TRANS)) && |
247 |
< |
m->otype != MAT_CLIP && |
248 |
< |
(ofun[m->otype].flags & (T_M|T_X))) { |
214 |
< |
if (irr_ignore(m->otype)) { |
215 |
< |
raytrans(r); |
216 |
< |
return(1); |
217 |
< |
} |
218 |
< |
if (!islight(m->otype)) |
219 |
< |
m = &Lamb; |
220 |
< |
} |
246 |
> |
if (tst_irrad && raytirrad(m, r)) |
247 |
> |
return(1); |
248 |
> |
|
249 |
|
if ((*ofun[m->otype].funp)(m, r)) |
250 |
|
return(1); /* materials call raytexture() */ |
251 |
|
} |
277 |
|
multcolor(r->rcol, ce); /* path extinction */ |
278 |
|
if (r->crtype & SHADOW || intens(r->albedo) <= FTINY) |
279 |
|
return; /* no scattering */ |
280 |
< |
setcolor(ca, |
281 |
< |
colval(r->albedo,RED)*colval(ambval,RED)*(1.-colval(ce,RED)), |
282 |
< |
colval(r->albedo,GRN)*colval(ambval,GRN)*(1.-colval(ce,GRN)), |
283 |
< |
colval(r->albedo,BLU)*colval(ambval,BLU)*(1.-colval(ce,BLU))); |
284 |
< |
addcolor(r->rcol, ca); /* ambient in scattering */ |
280 |
> |
|
281 |
> |
/* PMAP: indirect inscattering accounted for by volume photons? */ |
282 |
> |
if (!volumePhotonMapping) { |
283 |
> |
setcolor(ca, |
284 |
> |
colval(r->albedo,RED)*colval(ambval,RED)*(1.-colval(ce,RED)), |
285 |
> |
colval(r->albedo,GRN)*colval(ambval,GRN)*(1.-colval(ce,GRN)), |
286 |
> |
colval(r->albedo,BLU)*colval(ambval,BLU)*(1.-colval(ce,BLU))); |
287 |
> |
addcolor(r->rcol, ca); /* ambient in scattering */ |
288 |
> |
} |
289 |
> |
|
290 |
|
srcscatter(r); /* source in scattering */ |
291 |
|
} |
292 |
|
|
325 |
|
) |
326 |
|
{ |
327 |
|
RAY fr, br; |
328 |
+ |
double mfore, mback; |
329 |
|
int foremat, backmat; |
330 |
|
int i; |
331 |
|
/* bound coefficient */ |
372 |
|
scalecolor(br.rcol, 1.0-coef); |
373 |
|
copycolor(r->rcol, fr.rcol); |
374 |
|
addcolor(r->rcol, br.rcol); |
375 |
< |
r->rt = bright(fr.rcol) > bright(br.rcol) ? fr.rt : br.rt; |
375 |
> |
scalecolor(fr.mcol, coef); |
376 |
> |
scalecolor(br.mcol, 1.0-coef); |
377 |
> |
copycolor(r->mcol, fr.mcol); |
378 |
> |
addcolor(r->mcol, br.mcol); |
379 |
> |
mfore = bright(fr.mcol); mback = bright(br.mcol); |
380 |
> |
r->rmt = mfore > mback ? fr.rmt : br.rmt; |
381 |
> |
r->rxt = bright(fr.rcol)-mfore > bright(br.rcol)-mback ? |
382 |
> |
fr.rxt : br.rxt; |
383 |
|
return(1); |
384 |
|
} |
385 |
|
|
407 |
|
int flags |
408 |
|
) |
409 |
|
{ |
410 |
< |
double eext[3]; |
370 |
< |
int i; |
410 |
> |
static int warnedPM = 0; |
411 |
|
|
372 |
– |
eext[0] = eext[1] = eext[2] = 0.; |
412 |
|
rc[0] = rc[1] = rc[2] = 1.; |
413 |
|
|
414 |
|
while (r != NULL && r->crtype&flags) { |
415 |
< |
for (i = 3; i--; ) { |
415 |
> |
int i = 3; |
416 |
> |
while (i--) |
417 |
|
rc[i] *= colval(r->rcoef,i); |
418 |
< |
eext[i] += r->rot * colval(r->cext,i); |
418 |
> |
/* check for participating medium */ |
419 |
> |
if (!warnedPM && (bright(r->cext) > FTINY) | |
420 |
> |
(bright(r->albedo) > FTINY)) { |
421 |
> |
error(WARNING, |
422 |
> |
"ray contribution calculation does not support participating media"); |
423 |
> |
warnedPM++; |
424 |
|
} |
425 |
|
r = r->parent; |
426 |
|
} |
382 |
– |
for (i = 3; i--; ) |
383 |
– |
rc[i] *= (eext[i] <= FTINY) ? 1. : |
384 |
– |
(eext[i] > 92.) ? 0. : exp(-eext[i]); |
427 |
|
} |
428 |
|
|
429 |
|
|
513 |
|
r->pert[0] = -r->pert[0]; |
514 |
|
r->pert[1] = -r->pert[1]; |
515 |
|
r->pert[2] = -r->pert[2]; |
516 |
+ |
r->rflips++; |
517 |
|
} |
518 |
|
|
519 |
+ |
|
520 |
+ |
int |
521 |
+ |
rayreject( /* check if candidate hit is worse than current */ |
522 |
+ |
OBJREC *o, |
523 |
+ |
RAY *r, |
524 |
+ |
double t |
525 |
+ |
) |
526 |
+ |
{ |
527 |
+ |
OBJREC *mnew, *mray; |
528 |
+ |
|
529 |
+ |
if ((t <= FTINY) | (t > r->rot + FTINY)) |
530 |
+ |
return 1; |
531 |
+ |
if (t < r->rot - FTINY) /* is new hit significantly closer? */ |
532 |
+ |
return 0; |
533 |
+ |
/* coincident, so decide... */ |
534 |
+ |
if (o == r->ro) |
535 |
+ |
return 1; /* shouldn't happen */ |
536 |
+ |
if (r->ro == NULL) |
537 |
+ |
return 0; /* ditto */ |
538 |
+ |
if ((mnew = findmaterial(o)) == NULL) |
539 |
+ |
return 1; /* new has no material */ |
540 |
+ |
if ((mray = findmaterial(r->ro)) == NULL) |
541 |
+ |
return 0; /* old has no material(!) */ |
542 |
+ |
if (istransp(mnew->otype)) |
543 |
+ |
return 1; /* new is transparent */ |
544 |
+ |
|
545 |
+ |
return !istransp(mray->otype); /* reject unless old is */ |
546 |
+ |
} |
547 |
|
|
548 |
|
void |
549 |
|
rayhit( /* standard ray hit test */ |