14 |
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#include "otypes.h" |
15 |
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#include "otspecial.h" |
16 |
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#include "random.h" |
17 |
+ |
#include "pmap.h" |
18 |
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|
19 |
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#define MAXCSET ((MAXSET+1)*2-1) /* maximum check set size */ |
20 |
|
|
36 |
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static void checkset(OBJECT *os, OBJECT *cs); |
37 |
|
|
38 |
|
|
39 |
< |
extern int |
39 |
> |
int |
40 |
|
rayorigin( /* start new ray from old one */ |
41 |
|
RAY *r, |
42 |
|
int rt, |
51 |
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setcolor(r->rcoef, 1., 1., 1.); |
52 |
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} else { |
53 |
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rw = intens(rc); |
54 |
+ |
if (rw > 1.0) |
55 |
+ |
rw = 1.0; /* avoid calculation growth */ |
56 |
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if (rc != r->rcoef) |
57 |
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copycolor(r->rcoef, rc); |
58 |
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} |
109 |
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return(-1); |
110 |
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if (r->crtype & SHADOW) /* shadow commitment */ |
111 |
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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 |
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if (minweight <= 0.0) |
121 |
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error(USER, "zero ray weight in Russian roulette"); |
122 |
< |
if (maxdepth < 0 && r->rlvl > -maxdepth) |
122 |
> |
if ((maxdepth < 0) & (r->rlvl > -maxdepth)) |
123 |
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return(-1); /* upper reflection limit */ |
124 |
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if (r->rweight >= minweight) |
125 |
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return(0); |
130 |
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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 |
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} |
135 |
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|
136 |
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|
137 |
< |
extern void |
137 |
> |
void |
138 |
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rayclear( /* clear a ray for (re)evaluation */ |
139 |
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RAY *r |
140 |
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) |
145 |
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r->robj = OVOID; |
146 |
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r->ro = NULL; |
147 |
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r->rox = NULL; |
148 |
< |
r->rt = r->rot = FHUGE; |
148 |
> |
r->rxt = r->rmt = r->rot = FHUGE; |
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r->pert[0] = r->pert[1] = r->pert[2] = 0.0; |
150 |
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r->uv[0] = r->uv[1] = 0.0; |
151 |
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setcolor(r->pcol, 1.0, 1.0, 1.0); |
152 |
+ |
setcolor(r->mcol, 0.0, 0.0, 0.0); |
153 |
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setcolor(r->rcol, 0.0, 0.0, 0.0); |
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} |
155 |
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|
156 |
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|
157 |
< |
extern void |
157 |
> |
void |
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raytrace( /* trace a ray and compute its value */ |
159 |
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RAY *r |
160 |
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) |
174 |
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} |
175 |
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|
176 |
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|
177 |
< |
extern void |
177 |
> |
void |
178 |
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raycont( /* check for clipped object and continue */ |
179 |
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RAY *r |
180 |
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) |
185 |
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} |
186 |
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|
187 |
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|
188 |
< |
extern void |
188 |
> |
void |
189 |
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raytrans( /* transmit ray as is */ |
190 |
|
RAY *r |
191 |
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) |
192 |
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{ |
193 |
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RAY tr; |
194 |
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|
195 |
< |
if (rayorigin(&tr, TRANS, r, NULL) == 0) { |
196 |
< |
VCOPY(tr.rdir, r->rdir); |
197 |
< |
rayvalue(&tr); |
198 |
< |
copycolor(r->rcol, tr.rcol); |
199 |
< |
r->rt = r->rot + tr.rt; |
195 |
> |
rayorigin(&tr, TRANS, r, NULL); /* always continue */ |
196 |
> |
VCOPY(tr.rdir, r->rdir); |
197 |
> |
rayvalue(&tr); |
198 |
> |
copycolor(r->mcol, tr.mcol); |
199 |
> |
copycolor(r->rcol, tr.rcol); |
200 |
> |
r->rmt = r->rot + tr.rmt; |
201 |
> |
r->rxt = r->rot + tr.rxt; |
202 |
> |
} |
203 |
> |
|
204 |
> |
|
205 |
> |
int |
206 |
> |
raytirrad( /* irradiance hack */ |
207 |
> |
OBJREC *m, |
208 |
> |
RAY *r |
209 |
> |
) |
210 |
> |
{ |
211 |
> |
if (ofun[m->otype].flags & (T_M|T_X) && m->otype != MAT_CLIP) { |
212 |
> |
if (istransp(m->otype) || isBSDFproxy(m)) { |
213 |
> |
raytrans(r); |
214 |
> |
return(1); |
215 |
> |
} |
216 |
> |
if (!islight(m->otype)) |
217 |
> |
return((*ofun[Lamb.otype].funp)(&Lamb, r)); |
218 |
|
} |
219 |
+ |
return(0); /* not a qualifying surface */ |
220 |
|
} |
221 |
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|
222 |
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|
223 |
< |
extern int |
223 |
> |
int |
224 |
|
rayshade( /* shade ray r with material mod */ |
225 |
|
RAY *r, |
226 |
|
int mod |
227 |
|
) |
228 |
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{ |
229 |
+ |
int tst_irrad = do_irrad && !(r->crtype & ~(PRIMARY|TRANS)); |
230 |
|
OBJREC *m; |
231 |
|
|
232 |
< |
r->rt = r->rot; /* set effective ray length */ |
232 |
> |
r->rxt = r->rmt = r->rot; /* preset effective ray length */ |
233 |
|
for ( ; mod != OVOID; mod = m->omod) { |
234 |
|
m = objptr(mod); |
235 |
|
/****** unnecessary test since modifier() is always called |
239 |
|
} |
240 |
|
******/ |
241 |
|
/* hack for irradiance calculation */ |
242 |
< |
if (do_irrad && !(r->crtype & ~(PRIMARY|TRANS)) && |
243 |
< |
m->otype != MAT_CLIP && |
244 |
< |
(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 |
< |
} |
242 |
> |
if (tst_irrad && raytirrad(m, r)) |
243 |
> |
return(1); |
244 |
> |
|
245 |
|
if ((*ofun[m->otype].funp)(m, r)) |
246 |
|
return(1); /* materials call raytexture() */ |
247 |
|
} |
249 |
|
} |
250 |
|
|
251 |
|
|
252 |
< |
extern void |
252 |
> |
void |
253 |
|
rayparticipate( /* compute ray medium participation */ |
254 |
|
RAY *r |
255 |
|
) |
273 |
|
multcolor(r->rcol, ce); /* path extinction */ |
274 |
|
if (r->crtype & SHADOW || intens(r->albedo) <= FTINY) |
275 |
|
return; /* no scattering */ |
276 |
< |
setcolor(ca, |
277 |
< |
colval(r->albedo,RED)*colval(ambval,RED)*(1.-colval(ce,RED)), |
278 |
< |
colval(r->albedo,GRN)*colval(ambval,GRN)*(1.-colval(ce,GRN)), |
279 |
< |
colval(r->albedo,BLU)*colval(ambval,BLU)*(1.-colval(ce,BLU))); |
280 |
< |
addcolor(r->rcol, ca); /* ambient in scattering */ |
276 |
> |
|
277 |
> |
/* PMAP: indirect inscattering accounted for by volume photons? */ |
278 |
> |
if (!volumePhotonMapping) { |
279 |
> |
setcolor(ca, |
280 |
> |
colval(r->albedo,RED)*colval(ambval,RED)*(1.-colval(ce,RED)), |
281 |
> |
colval(r->albedo,GRN)*colval(ambval,GRN)*(1.-colval(ce,GRN)), |
282 |
> |
colval(r->albedo,BLU)*colval(ambval,BLU)*(1.-colval(ce,BLU))); |
283 |
> |
addcolor(r->rcol, ca); /* ambient in scattering */ |
284 |
> |
} |
285 |
> |
|
286 |
|
srcscatter(r); /* source in scattering */ |
287 |
|
} |
288 |
|
|
289 |
|
|
290 |
< |
extern void |
290 |
> |
void |
291 |
|
raytexture( /* get material modifiers */ |
292 |
|
RAY *r, |
293 |
|
OBJECT mod |
312 |
|
} |
313 |
|
|
314 |
|
|
315 |
< |
extern int |
315 |
> |
int |
316 |
|
raymixture( /* mix modifiers */ |
317 |
|
RAY *r, |
318 |
|
OBJECT fore, |
321 |
|
) |
322 |
|
{ |
323 |
|
RAY fr, br; |
324 |
+ |
double mfore, mback; |
325 |
|
int foremat, backmat; |
326 |
|
int i; |
327 |
|
/* bound coefficient */ |
368 |
|
scalecolor(br.rcol, 1.0-coef); |
369 |
|
copycolor(r->rcol, fr.rcol); |
370 |
|
addcolor(r->rcol, br.rcol); |
371 |
< |
r->rt = bright(fr.rcol) > bright(br.rcol) ? fr.rt : br.rt; |
371 |
> |
scalecolor(fr.mcol, coef); |
372 |
> |
scalecolor(br.mcol, 1.0-coef); |
373 |
> |
copycolor(r->mcol, fr.mcol); |
374 |
> |
addcolor(r->mcol, br.mcol); |
375 |
> |
mfore = bright(fr.mcol); mback = bright(br.mcol); |
376 |
> |
r->rmt = mfore > mback ? fr.rmt : br.rmt; |
377 |
> |
r->rxt = bright(fr.rcol)-mfore > bright(br.rcol)-mback ? |
378 |
> |
fr.rxt : br.rxt; |
379 |
|
return(1); |
380 |
|
} |
381 |
|
|
382 |
|
|
383 |
< |
extern double |
383 |
> |
double |
384 |
|
raydist( /* compute (cumulative) ray distance */ |
385 |
|
const RAY *r, |
386 |
|
int flags |
396 |
|
} |
397 |
|
|
398 |
|
|
399 |
< |
extern void |
399 |
> |
void |
400 |
|
raycontrib( /* compute (cumulative) ray contribution */ |
401 |
|
RREAL rc[3], |
402 |
|
const RAY *r, |
403 |
|
int flags |
404 |
|
) |
405 |
|
{ |
406 |
< |
double eext[3]; |
370 |
< |
int i; |
406 |
> |
static int warnedPM = 0; |
407 |
|
|
372 |
– |
eext[0] = eext[1] = eext[2] = 0.; |
408 |
|
rc[0] = rc[1] = rc[2] = 1.; |
409 |
|
|
410 |
|
while (r != NULL && r->crtype&flags) { |
411 |
< |
for (i = 3; i--; ) { |
411 |
> |
int i = 3; |
412 |
> |
while (i--) |
413 |
|
rc[i] *= colval(r->rcoef,i); |
414 |
< |
eext[i] += r->rot * colval(r->cext,i); |
414 |
> |
/* check for participating medium */ |
415 |
> |
if (!warnedPM && (bright(r->cext) > FTINY) | |
416 |
> |
(bright(r->albedo) > FTINY)) { |
417 |
> |
error(WARNING, |
418 |
> |
"ray contribution calculation does not support participating media"); |
419 |
> |
warnedPM++; |
420 |
|
} |
421 |
|
r = r->parent; |
422 |
|
} |
382 |
– |
for (i = 3; i--; ) |
383 |
– |
rc[i] *= (eext[i] <= FTINY) ? 1. : |
384 |
– |
(eext[i] > 92.) ? 0. : exp(-eext[i]); |
423 |
|
} |
424 |
|
|
425 |
|
|
426 |
< |
extern double |
426 |
> |
double |
427 |
|
raynormal( /* compute perturbed normal for ray */ |
428 |
|
FVECT norm, |
429 |
|
RAY *r |
459 |
|
} |
460 |
|
|
461 |
|
|
462 |
< |
extern void |
462 |
> |
void |
463 |
|
newrayxf( /* get new tranformation matrix for ray */ |
464 |
|
RAY *r |
465 |
|
) |
497 |
|
} |
498 |
|
|
499 |
|
|
500 |
< |
extern void |
500 |
> |
void |
501 |
|
flipsurface( /* reverse surface orientation */ |
502 |
|
RAY *r |
503 |
|
) |
512 |
|
} |
513 |
|
|
514 |
|
|
515 |
< |
extern void |
515 |
> |
void |
516 |
|
rayhit( /* standard ray hit test */ |
517 |
|
OBJECT *oset, |
518 |
|
RAY *r |
529 |
|
} |
530 |
|
|
531 |
|
|
532 |
< |
extern int |
532 |
> |
int |
533 |
|
localhit( /* check for hit in the octree */ |
534 |
|
RAY *r, |
535 |
|
CUBE *scene |