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#include "ray.h" |
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#include "octree.h" |
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#include "source.h" |
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#include "otypes.h" |
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extern double dstrsrc; /* source distribution amount */ |
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extern double shadthresh; /* relative shadow threshold */ |
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|
31 |
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SOURCE srcval[MAXSOURCE]; /* our array of sources */ |
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SRCREC *source = NULL; /* our list of sources */ |
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int nsources = 0; /* the number of sources */ |
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|
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|
61 |
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m->oargs.farg[3] <= FTINY) |
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continue; /* don't bother */ |
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|
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if (nsources >= MAXSOURCE) |
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error(INTERNAL, "too many sources in marksources"); |
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if (source == NULL) |
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source = (SRCREC *)malloc(sizeof(SRCREC)); |
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else |
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source = (SRCREC *)realloc((char *)source, |
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(unsigned)(nsources+1)*sizeof(SRCREC)); |
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if (source == NULL) |
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error(SYSTEM, "out of memory in marksources"); |
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|
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newsource(&srcval[nsources], o); |
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newsource(&source[nsources], o); |
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|
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if (m->otype == MAT_GLOW) { |
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< |
srcval[nsources].sflags |= SPROX; |
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srcval[nsources].sl.prox = m->oargs.farg[3]; |
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> |
source[nsources].sflags |= SPROX; |
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source[nsources].sl.prox = m->oargs.farg[3]; |
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if (o->otype == OBJ_SOURCE) |
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srcval[nsources].sflags |= SSKIP; |
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> |
source[nsources].sflags |= SSKIP; |
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} else if (m->otype == MAT_SPOT) { |
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srcval[nsources].sflags |= SSPOT; |
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srcval[nsources].sl.s = makespot(m); |
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source[nsources].sflags |= SSPOT; |
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source[nsources].sl.s = makespot(m); |
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} |
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nsources++; |
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} |
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newsource(src, so) /* add a source to the array */ |
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register SOURCE *src; |
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register SRCREC *src; |
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register OBJREC *so; |
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{ |
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double cos(), tan(), sqrt(); |
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register int i; |
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|
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src->sflags = 0; |
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src->nhits = 1; src->ntests = 2; /* start probability = 1/2 */ |
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src->so = so; |
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switch (so->otype) { |
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double d; |
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register int i; |
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if (srcval[sn].sflags & SSKIP) |
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if (source[sn].sflags & SSKIP) |
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return(0.0); /* skip this source */ |
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rayorigin(sr, r, SHADOW, 1.0); /* ignore limits */ |
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|
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sr->rsrc = sn; /* remember source */ |
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/* get source direction */ |
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if (srcval[sn].sflags & SDISTANT) |
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if (source[sn].sflags & SDISTANT) |
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/* constant direction */ |
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VCOPY(sr->rdir, srcval[sn].sloc); |
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VCOPY(sr->rdir, source[sn].sloc); |
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else { /* compute direction */ |
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for (i = 0; i < 3; i++) |
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sr->rdir[i] = srcval[sn].sloc[i] - sr->rorg[i]; |
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sr->rdir[i] = source[sn].sloc[i] - sr->rorg[i]; |
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|
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if (srcval[sn].so->otype == OBJ_FACE) |
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norm = getface(srcval[sn].so)->norm; |
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else if (srcval[sn].so->otype == OBJ_RING) |
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norm = getcone(srcval[sn].so,0)->ad; |
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if (source[sn].so->otype == OBJ_FACE) |
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norm = getface(source[sn].so)->norm; |
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else if (source[sn].so->otype == OBJ_RING) |
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norm = getcone(source[sn].so,0)->ad; |
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|
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if (norm != NULL && (ddot = -DOT(sr->rdir, norm)) <= FTINY) |
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return(0.0); /* behind surface! */ |
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if (dstrsrc > FTINY) { |
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/* distribute source direction */ |
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for (i = 0; i < 3; i++) |
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vd[i] = dstrsrc * srcval[sn].ss * (1.0 - 2.0*frandom()); |
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vd[i] = dstrsrc * source[sn].ss * (1.0 - 2.0*frandom()); |
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|
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if (norm != NULL) { /* project offset */ |
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d = DOT(vd, norm); |
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for (i = 0; i < 3; i++) /* offset source direction */ |
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sr->rdir[i] += vd[i]; |
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} else if (srcval[sn].sflags & SDISTANT) |
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} else if (source[sn].sflags & SDISTANT) |
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/* already normalized */ |
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< |
return(srcval[sn].ss2); |
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> |
return(source[sn].ss2); |
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|
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if ((d = normalize(sr->rdir)) == 0.0) |
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/* at source! */ |
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return(0.0); |
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if (srcval[sn].sflags & SDISTANT) |
224 |
> |
if (source[sn].sflags & SDISTANT) |
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/* domega constant */ |
226 |
< |
return(srcval[sn].ss2); |
226 |
> |
return(source[sn].ss2); |
227 |
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|
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else { |
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/* check proximity */ |
230 |
< |
if (srcval[sn].sflags & SPROX && |
231 |
< |
d > srcval[sn].sl.prox) |
230 |
> |
if (source[sn].sflags & SPROX && |
231 |
> |
d > source[sn].sl.prox) |
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return(0.0); |
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|
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if (norm != NULL) |
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else |
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ddot = 1.0; |
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/* check angle */ |
239 |
< |
if (srcval[sn].sflags & SSPOT) { |
240 |
< |
if (srcval[sn].sl.s->siz < 2.0*PI * |
241 |
< |
(1.0 + DOT(srcval[sn].sl.s->aim,sr->rdir))) |
239 |
> |
if (source[sn].sflags & SSPOT) { |
240 |
> |
if (source[sn].sl.s->siz < 2.0*PI * |
241 |
> |
(1.0 + DOT(source[sn].sl.s->aim,sr->rdir))) |
242 |
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return(0.0); |
243 |
< |
d += srcval[sn].sl.s->flen; |
243 |
> |
d += source[sn].sl.s->flen; |
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} |
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/* return domega */ |
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< |
return(ddot*srcval[sn].ss2/(d*d)); |
246 |
> |
return(ddot*source[sn].ss2/(d*d)); |
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} |
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} |
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first = 0; last = nsources-1; |
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} |
262 |
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for (i = first; i <= last; i++) |
263 |
< |
if (srcval[i].sflags & SDISTANT) |
263 |
> |
if (source[i].sflags & SDISTANT) |
264 |
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/* |
265 |
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* Check to see if ray is within |
266 |
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* solid angle of source. |
267 |
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*/ |
268 |
< |
if (2.0*PI * (1.0 - DOT(srcval[i].sloc,r->rdir)) |
269 |
< |
<= srcval[i].ss2) { |
270 |
< |
r->ro = srcval[i].so; |
271 |
< |
if (!(srcval[i].sflags & SSKIP)) |
268 |
> |
if (2.0*PI * (1.0 - DOT(source[i].sloc,r->rdir)) |
269 |
> |
<= source[i].ss2) { |
270 |
> |
r->ro = source[i].so; |
271 |
> |
if (!(source[i].sflags & SSKIP)) |
272 |
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break; |
273 |
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} |
274 |
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|
284 |
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} |
285 |
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|
286 |
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|
287 |
+ |
static int |
288 |
+ |
cntcmp(sc1, sc2) /* contribution compare (descending) */ |
289 |
+ |
register CONTRIB *sc1, *sc2; |
290 |
+ |
{ |
291 |
+ |
if (sc1->brt > sc2->brt) |
292 |
+ |
return(-1); |
293 |
+ |
if (sc1->brt < sc2->brt) |
294 |
+ |
return(1); |
295 |
+ |
return(0); |
296 |
+ |
} |
297 |
+ |
|
298 |
+ |
|
299 |
+ |
direct(r, f, p) /* add direct component */ |
300 |
+ |
RAY *r; /* ray that hit surface */ |
301 |
+ |
int (*f)(); /* direct component coefficient function */ |
302 |
+ |
char *p; /* data for f */ |
303 |
+ |
{ |
304 |
+ |
register int sn; |
305 |
+ |
register CONTRIB *srccnt; |
306 |
+ |
double dtmp, hwt, test2, hit2; |
307 |
+ |
RAY sr; |
308 |
+ |
|
309 |
+ |
if ((srccnt = (CONTRIB *)malloc(nsources*sizeof(CONTRIB))) == NULL) |
310 |
+ |
error(SYSTEM, "out of memory in direct"); |
311 |
+ |
/* potential contributions */ |
312 |
+ |
for (sn = 0; sn < nsources; sn++) { |
313 |
+ |
srccnt[sn].sno = sn; |
314 |
+ |
setcolor(srccnt[sn].val, 0.0, 0.0, 0.0); |
315 |
+ |
srccnt[sn].brt = 0.0; |
316 |
+ |
/* get source ray */ |
317 |
+ |
if ((srccnt[sn].dom = srcray(&sr, r, sn)) == 0.0) |
318 |
+ |
continue; |
319 |
+ |
VCOPY(srccnt[sn].dir, sr.rdir); |
320 |
+ |
/* compute coefficient */ |
321 |
+ |
(*f)(srccnt[sn].val, p, srccnt[sn].dir, srccnt[sn].dom); |
322 |
+ |
srccnt[sn].brt = bright(srccnt[sn].val); |
323 |
+ |
if (srccnt[sn].brt <= FTINY) |
324 |
+ |
continue; |
325 |
+ |
/* compute intersection */ |
326 |
+ |
if (!( source[sn].sflags & SDISTANT ? |
327 |
+ |
sourcehit(&sr) : |
328 |
+ |
(*ofun[source[sn].so->otype].funp) |
329 |
+ |
(source[sn].so, &sr) )) |
330 |
+ |
continue; |
331 |
+ |
/* compute contribution */ |
332 |
+ |
rayshade(&sr, sr.ro->omod); |
333 |
+ |
multcolor(srccnt[sn].val, sr.rcol); |
334 |
+ |
srccnt[sn].brt = bright(srccnt[sn].val); |
335 |
+ |
} |
336 |
+ |
/* sort contributions */ |
337 |
+ |
qsort(srccnt, nsources, sizeof(CONTRIB), cntcmp); |
338 |
+ |
hit2 = test2 = 0.0; |
339 |
+ |
/* test for shadows */ |
340 |
+ |
for (sn = 0; sn < nsources; sn++) { |
341 |
+ |
/* check threshold */ |
342 |
+ |
if (srccnt[sn].brt <= shadthresh*bright(r->rcol)/r->rweight) |
343 |
+ |
break; |
344 |
+ |
/* get statistics */ |
345 |
+ |
hwt = (double)source[srccnt[sn].sno].nhits / |
346 |
+ |
(double)source[srccnt[sn].sno].ntests; |
347 |
+ |
test2 += hwt; |
348 |
+ |
source[srccnt[sn].sno].ntests++; |
349 |
+ |
/* test for hit */ |
350 |
+ |
rayorigin(&sr, r, SHADOW, 1.0); |
351 |
+ |
VCOPY(sr.rdir, srccnt[sn].dir); |
352 |
+ |
if (localhit(&sr, &thescene) && |
353 |
+ |
sr.ro != source[srccnt[sn].sno].so) { |
354 |
+ |
/* check for transmission */ |
355 |
+ |
if (sr.clipset != NULL && inset(sr.clipset,sr.ro->omod)) |
356 |
+ |
raytrans(&sr); /* object is clipped */ |
357 |
+ |
else |
358 |
+ |
rayshade(&sr, sr.ro->omod); |
359 |
+ |
if (bright(sr.rcol) <= FTINY) |
360 |
+ |
continue; /* missed! */ |
361 |
+ |
(*f)(srccnt[sn].val, p, srccnt[sn].dir, srccnt[sn].dom); |
362 |
+ |
multcolor(srccnt[sn].val, sr.rcol); |
363 |
+ |
} |
364 |
+ |
/* add contribution if hit */ |
365 |
+ |
addcolor(r->rcol, srccnt[sn].val); |
366 |
+ |
hit2 += hwt; |
367 |
+ |
source[srccnt[sn].sno].nhits++; |
368 |
+ |
} |
369 |
+ |
if (test2 > FTINY) /* weighted hit rate */ |
370 |
+ |
hwt = hit2 / test2; |
371 |
+ |
else |
372 |
+ |
hwt = 0.0; |
373 |
+ |
#ifdef DEBUG |
374 |
+ |
fprintf(stderr, "%d tested, %f hit rate\n", sn, hwt); |
375 |
+ |
#endif |
376 |
+ |
/* add in untested sources */ |
377 |
+ |
for ( ; sn < nsources; sn++) { |
378 |
+ |
if (srccnt[sn].brt <= 0.0) |
379 |
+ |
break; |
380 |
+ |
dtmp = hwt * (double)source[srccnt[sn].sno].nhits / |
381 |
+ |
(double)source[srccnt[sn].sno].ntests; |
382 |
+ |
scalecolor(srccnt[sn].val, dtmp); |
383 |
+ |
addcolor(r->rcol, srccnt[sn].val); |
384 |
+ |
} |
385 |
+ |
|
386 |
+ |
free(srccnt); |
387 |
+ |
} |
388 |
+ |
|
389 |
+ |
|
390 |
|
#define wrongsource(m, r) (m->otype!=MAT_ILLUM && \ |
391 |
|
r->rsrc>=0 && \ |
392 |
< |
srcval[r->rsrc].so!=r->ro) |
392 |
> |
source[r->rsrc].so!=r->ro) |
393 |
|
|
394 |
|
#define badambient(m, r) ((r->crtype&(AMBIENT|SHADOW))==AMBIENT && \ |
395 |
|
!(r->rtype&REFLECTED) && /* hack! */\ |
396 |
|
!(m->otype==MAT_GLOW&&r->rot>m->oargs.farg[3])) |
397 |
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|
398 |
|
#define passillum(m, r) (m->otype==MAT_ILLUM && \ |
399 |
< |
!(r->rsrc>=0&&srcval[r->rsrc].so==r->ro)) |
399 |
> |
!(r->rsrc>=0&&source[r->rsrc].so==r->ro)) |
400 |
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|
401 |
|
|
402 |
|
m_light(m, r) /* ray hit a light source */ |