8 |
|
*/ |
9 |
|
|
10 |
|
#include "ray.h" |
11 |
– |
|
11 |
|
#include "otypes.h" |
12 |
< |
|
12 |
> |
#include "rtotypes.h" |
13 |
|
#include "source.h" |
15 |
– |
|
14 |
|
#include "random.h" |
15 |
|
|
16 |
|
extern double ssampdist; /* scatter sampling distance */ |
39 |
|
static CNTPTR *cntord; /* source ordering in direct() */ |
40 |
|
static int maxcntr = 0; /* size of contribution arrays */ |
41 |
|
|
42 |
+ |
static int cntcmp(const void *p1, const void *p2); |
43 |
|
|
44 |
< |
OBJREC * /* find an object's actual material */ |
44 |
> |
|
45 |
> |
extern OBJREC * /* find an object's actual material */ |
46 |
|
findmaterial(register OBJREC *o) |
47 |
|
{ |
48 |
|
while (!ismaterial(o->otype)) { |
49 |
– |
if (ismixture(o->otype)) |
50 |
– |
return(NULL); /* reject mixed materials */ |
49 |
|
if (o->otype == MOD_ALIAS && o->oargs.nsargs) { |
50 |
|
OBJECT aobj; |
51 |
|
OBJREC *ao; |
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); |
67 |
> |
return(o); /* mixtures will return NULL */ |
68 |
|
} |
69 |
|
|
70 |
|
|
71 |
< |
void |
72 |
< |
marksources() /* find and mark source objects */ |
71 |
> |
extern void |
72 |
> |
marksources(void) /* find and mark source objects */ |
73 |
|
{ |
74 |
|
int foundsource = 0; |
75 |
|
int i; |
127 |
|
} |
128 |
|
} |
129 |
|
#if SHADCACHE |
130 |
< |
source[ns].obscache = NULL; |
130 |
> |
initobscache(ns); |
131 |
|
#endif |
132 |
|
if (!(source[ns].sflags & SSKIP)) |
133 |
|
foundsource++; |
149 |
|
} |
150 |
|
|
151 |
|
|
152 |
< |
void |
153 |
< |
freesources() /* free all source structures */ |
152 |
> |
extern void |
153 |
> |
freesources(void) /* free all source structures */ |
154 |
|
{ |
155 |
|
if (nsources > 0) { |
156 |
|
#if SHADCACHE |
171 |
|
} |
172 |
|
|
173 |
|
|
174 |
< |
int |
174 |
> |
extern int |
175 |
|
srcray( /* send a ray to a source, return domega */ |
176 |
< |
register RAY *sr, /* returned source ray */ |
177 |
< |
RAY *r, /* ray which hit object */ |
178 |
< |
SRCINDEX *si /* source sample index */ |
176 |
> |
register RAY *sr, /* returned source ray */ |
177 |
> |
RAY *r, /* ray which hit object */ |
178 |
> |
SRCINDEX *si /* source sample index */ |
179 |
|
) |
180 |
|
{ |
181 |
|
double d; /* distance to source */ |
182 |
|
register SRCREC *srcp; |
183 |
|
|
184 |
< |
rayorigin(sr, r, SHADOW, 1.0); /* ignore limits */ |
184 |
> |
rayorigin(sr, SHADOW, r, NULL); /* ignore limits */ |
185 |
|
|
186 |
|
while ((d = nextssamp(sr, si)) != 0.0) { |
187 |
|
sr->rsrc = si->sn; /* remember source */ |
210 |
|
} |
211 |
|
|
212 |
|
|
213 |
< |
void |
213 |
> |
extern void |
214 |
|
srcvalue( /* punch ray to source and compute value */ |
215 |
< |
register RAY *r |
215 |
> |
register RAY *r |
216 |
|
) |
217 |
|
{ |
218 |
|
register SRCREC *sp; |
252 |
|
} |
253 |
|
|
254 |
|
|
255 |
< |
int |
255 |
> |
static int |
256 |
> |
transillum( /* check if material is transparent illum */ |
257 |
> |
OBJECT obj |
258 |
> |
) |
259 |
> |
{ |
260 |
> |
OBJREC *m = findmaterial(objptr(obj)); |
261 |
> |
|
262 |
> |
if (m == NULL) |
263 |
> |
return(1); |
264 |
> |
if (m->otype != MAT_ILLUM) |
265 |
> |
return(0); |
266 |
> |
return(!m->oargs.nsargs || !strcmp(m->oargs.sarg[0], VOIDID)); |
267 |
> |
} |
268 |
> |
|
269 |
> |
|
270 |
> |
extern int |
271 |
|
sourcehit( /* check to see if ray hit distant source */ |
272 |
< |
register RAY *r |
272 |
> |
register RAY *r |
273 |
|
) |
274 |
|
{ |
275 |
+ |
int glowsrc = -1; |
276 |
+ |
int transrc = -1; |
277 |
|
int first, last; |
278 |
|
register int i; |
279 |
|
|
282 |
|
} else { /* otherwise check all */ |
283 |
|
first = 0; last = nsources-1; |
284 |
|
} |
285 |
< |
for (i = first; i <= last; i++) |
286 |
< |
if ((source[i].sflags & (SDISTANT|SVIRTUAL)) == SDISTANT) |
287 |
< |
/* |
288 |
< |
* Check to see if ray is within |
289 |
< |
* solid angle of source. |
290 |
< |
*/ |
291 |
< |
if (2.0*PI * (1.0 - DOT(source[i].sloc,r->rdir)) |
292 |
< |
<= source[i].ss2) { |
293 |
< |
r->ro = source[i].so; |
294 |
< |
if (!(source[i].sflags & SSKIP)) |
295 |
< |
break; |
296 |
< |
} |
297 |
< |
|
298 |
< |
if (r->ro != NULL) { |
299 |
< |
r->robj = objndx(r->ro); |
300 |
< |
for (i = 0; i < 3; i++) |
301 |
< |
r->ron[i] = -r->rdir[i]; |
302 |
< |
r->rod = 1.0; |
303 |
< |
r->pert[0] = r->pert[1] = r->pert[2] = 0.0; |
304 |
< |
r->uv[0] = r->uv[1] = 0.0; |
305 |
< |
r->rox = NULL; |
306 |
< |
return(1); |
285 |
> |
for (i = first; i <= last; i++) { |
286 |
> |
if ((source[i].sflags & (SDISTANT|SVIRTUAL)) != SDISTANT) |
287 |
> |
continue; |
288 |
> |
/* |
289 |
> |
* Check to see if ray is within |
290 |
> |
* solid angle of source. |
291 |
> |
*/ |
292 |
> |
if (2.*PI*(1. - DOT(source[i].sloc,r->rdir)) > source[i].ss2) |
293 |
> |
continue; |
294 |
> |
/* is it the only possibility? */ |
295 |
> |
if (first == last) { |
296 |
> |
r->ro = source[i].so; |
297 |
> |
break; |
298 |
> |
} |
299 |
> |
/* |
300 |
> |
* If it's a glow or transparent illum, just remember it. |
301 |
> |
*/ |
302 |
> |
if (source[i].sflags & SSKIP) { |
303 |
> |
glowsrc = i; |
304 |
> |
continue; |
305 |
> |
} |
306 |
> |
if (transillum(source[i].so->omod)) { |
307 |
> |
transrc = i; |
308 |
> |
continue; |
309 |
> |
} |
310 |
> |
r->ro = source[i].so; /* otherwise, use first hit */ |
311 |
> |
break; |
312 |
|
} |
313 |
< |
return(0); |
313 |
> |
/* |
314 |
> |
* Do we need fallback? |
315 |
> |
*/ |
316 |
> |
if (r->ro == NULL) { |
317 |
> |
if (transrc >= 0 && r->crtype & (AMBIENT|SPECULAR)) |
318 |
> |
return(0); /* avoid overcounting */ |
319 |
> |
if (glowsrc >= 0) |
320 |
> |
r->ro = source[glowsrc].so; |
321 |
> |
else |
322 |
> |
return(0); /* nothing usable */ |
323 |
> |
} |
324 |
> |
/* |
325 |
> |
* Make assignments. |
326 |
> |
*/ |
327 |
> |
r->robj = objndx(r->ro); |
328 |
> |
for (i = 0; i < 3; i++) |
329 |
> |
r->ron[i] = -r->rdir[i]; |
330 |
> |
r->rod = 1.0; |
331 |
> |
r->pert[0] = r->pert[1] = r->pert[2] = 0.0; |
332 |
> |
r->uv[0] = r->uv[1] = 0.0; |
333 |
> |
r->rox = NULL; |
334 |
> |
return(1); |
335 |
|
} |
336 |
|
|
337 |
|
|
338 |
|
static int |
339 |
|
cntcmp( /* contribution compare (descending) */ |
340 |
< |
const void *p1, |
341 |
< |
const void *p2 |
340 |
> |
const void *p1, |
341 |
> |
const void *p2 |
342 |
|
) |
343 |
|
{ |
344 |
|
register const CNTPTR *sc1 = (const CNTPTR *)p1; |
352 |
|
} |
353 |
|
|
354 |
|
|
355 |
< |
void |
355 |
> |
extern void |
356 |
|
direct( /* add direct component */ |
357 |
< |
RAY *r, /* ray that hit surface */ |
358 |
< |
void (*f)(), /* direct component coefficient function */ |
359 |
< |
char *p /* data for f */ |
357 |
> |
RAY *r, /* ray that hit surface */ |
358 |
> |
srcdirf_t *f, /* direct component coefficient function */ |
359 |
> |
void *p /* data for f */ |
360 |
|
) |
361 |
|
{ |
317 |
– |
extern void (*trace)(); |
362 |
|
register int sn; |
363 |
|
register CONTRIB *scp; |
364 |
|
SRCINDEX si; |
386 |
|
scp->sno = sr.rsrc; |
387 |
|
/* compute coefficient */ |
388 |
|
(*f)(scp->coef, p, sr.rdir, si.dom); |
389 |
< |
cntord[sn].brt = bright(scp->coef); |
389 |
> |
cntord[sn].brt = intens(scp->coef); |
390 |
|
if (cntord[sn].brt <= 0.0) |
391 |
|
continue; |
392 |
|
#if SHADCACHE |
397 |
|
} |
398 |
|
#endif |
399 |
|
VCOPY(scp->dir, sr.rdir); |
400 |
+ |
copycolor(sr.rcoef, scp->coef); |
401 |
|
/* compute potential */ |
402 |
|
sr.revf = srcvalue; |
403 |
|
rayvalue(&sr); |
404 |
+ |
multcolor(sr.rcol, sr.rcoef); |
405 |
|
copycolor(scp->val, sr.rcol); |
406 |
< |
multcolor(scp->val, scp->coef); |
361 |
< |
cntord[sn].brt = bright(scp->val); |
406 |
> |
cntord[sn].brt = intens(sr.rcol); |
407 |
|
} |
408 |
|
/* sort contributions */ |
409 |
|
qsort(cntord, sn, sizeof(CNTPTR), cntcmp); |
441 |
|
break; |
442 |
|
scp = srccnt + cntord[sn].sndx; |
443 |
|
/* test for hit */ |
444 |
< |
rayorigin(&sr, r, SHADOW, 1.0); |
444 |
> |
rayorigin(&sr, SHADOW, r, NULL); |
445 |
> |
copycolor(sr.rcoef, scp->coef); |
446 |
|
VCOPY(sr.rdir, scp->dir); |
447 |
|
sr.rsrc = scp->sno; |
448 |
|
/* keep statistics */ |
455 |
|
source[scp->sno].sflags & SFOLLOW )) { |
456 |
|
/* follow entire path */ |
457 |
|
raycont(&sr); |
412 |
– |
rayparticipate(&sr); |
458 |
|
if (trace != NULL) |
459 |
|
(*trace)(&sr); /* trace execution */ |
460 |
|
if (bright(sr.rcol) <= FTINY) { |
466 |
|
#endif |
467 |
|
continue; /* missed! */ |
468 |
|
} |
469 |
+ |
rayparticipate(&sr); |
470 |
+ |
multcolor(sr.rcol, sr.rcoef); |
471 |
|
copycolor(scp->val, sr.rcol); |
472 |
< |
multcolor(scp->val, scp->coef); |
472 |
> |
} else if (trace != NULL && |
473 |
> |
(source[scp->sno].sflags & (SDISTANT|SVIRTUAL|SFOLLOW)) |
474 |
> |
== (SDISTANT|SFOLLOW) && |
475 |
> |
sourcehit(&sr) && rayshade(&sr, sr.ro->omod)) { |
476 |
> |
(*trace)(&sr); /* trace execution */ |
477 |
> |
/* skip call to rayparticipate() & scp->val update */ |
478 |
|
} |
479 |
|
/* add contribution if hit */ |
480 |
|
addcolor(r->rcol, scp->val); |
496 |
|
scp = srccnt + cntord[sn].sndx; |
497 |
|
prob = hwt * (double)source[scp->sno].nhits / |
498 |
|
(double)source[scp->sno].ntests; |
499 |
< |
if (prob > 1.0) |
500 |
< |
prob = 1.0; |
449 |
< |
scalecolor(scp->val, prob); |
499 |
> |
if (prob < 1.0) |
500 |
> |
scalecolor(scp->val, prob); |
501 |
|
addcolor(r->rcol, scp->val); |
502 |
|
} |
503 |
|
} |
504 |
|
|
505 |
|
|
506 |
< |
void |
506 |
> |
extern void |
507 |
|
srcscatter( /* compute source scattering into ray */ |
508 |
< |
register RAY *r |
508 |
> |
register RAY *r |
509 |
|
) |
510 |
|
{ |
511 |
|
int oldsampndx; |
551 |
|
if (!srcray(&sr, NULL, &si) || |
552 |
|
sr.rsrc != r->slights[i]) |
553 |
|
continue; /* no path */ |
554 |
+ |
#if SHADCACHE |
555 |
+ |
if (srcblocked(&sr)) /* check shadow cache */ |
556 |
+ |
continue; |
557 |
+ |
#endif |
558 |
|
copycolor(sr.cext, r->cext); |
559 |
|
copycolor(sr.albedo, r->albedo); |
560 |
|
sr.gecc = r->gecc; |
561 |
|
sr.slights = r->slights; |
562 |
|
rayvalue(&sr); /* eval. source ray */ |
563 |
< |
if (bright(sr.rcol) <= FTINY) |
563 |
> |
if (bright(sr.rcol) <= FTINY) { |
564 |
> |
#if SHADCACHE |
565 |
> |
srcblocker(&sr); /* add blocker to cache */ |
566 |
> |
#endif |
567 |
|
continue; |
568 |
+ |
} |
569 |
|
if (r->gecc <= FTINY) /* compute P(theta) */ |
570 |
|
d = 1.; |
571 |
|
else { |
605 |
|
static int |
606 |
|
weaksrcmat(OBJECT obj) /* identify material */ |
607 |
|
{ |
608 |
< |
OBJREC *o = findmaterial(objptr(obj)); |
608 |
> |
OBJREC *m = findmaterial(objptr(obj)); |
609 |
|
|
610 |
< |
if (o == NULL) return 0; |
611 |
< |
return((o->otype==MAT_ILLUM)|(o->otype==MAT_GLOW)); |
610 |
> |
if (m == NULL) return(0); |
611 |
> |
return((m->otype==MAT_ILLUM) | (m->otype==MAT_GLOW)); |
612 |
|
} |
613 |
|
|
614 |
|
#define illumblock(m, r) (!(source[r->rsrc].sflags&SVIRTUAL) && \ |
669 |
|
distglow(m, r, raydist(r,PRIMARY))) |
670 |
|
|
671 |
|
|
672 |
< |
int |
672 |
> |
extern int |
673 |
|
m_light( /* ray hit a light source */ |
674 |
< |
register OBJREC *m, |
675 |
< |
register RAY *r |
674 |
> |
register OBJREC *m, |
675 |
> |
register RAY *r |
676 |
|
) |
677 |
|
{ |
678 |
|
/* check for over-counting */ |
679 |
< |
if (badcomponent(m, r)) |
679 |
> |
if (badcomponent(m, r)) { |
680 |
> |
setcolor(r->rcoef, 0.0, 0.0, 0.0); |
681 |
|
return(1); |
682 |
< |
if (wrongsource(m, r)) |
682 |
> |
} |
683 |
> |
if (wrongsource(m, r)) { |
684 |
> |
setcolor(r->rcoef, 0.0, 0.0, 0.0); |
685 |
|
return(1); |
686 |
+ |
} |
687 |
|
/* check for passed illum */ |
688 |
|
if (passillum(m, r)) { |
689 |
|
if (m->oargs.nsargs && strcmp(m->oargs.sarg[0], VOIDID)) |
691 |
|
raytrans(r); |
692 |
|
return(1); |
693 |
|
} |
694 |
+ |
/* check for invisibility */ |
695 |
+ |
if (srcignore(m, r)) { |
696 |
+ |
setcolor(r->rcoef, 0.0, 0.0, 0.0); |
697 |
+ |
return(1); |
698 |
+ |
} |
699 |
|
/* otherwise treat as source */ |
700 |
|
/* check for behind */ |
701 |
|
if (r->rod < 0.0) |
634 |
– |
return(1); |
635 |
– |
/* check for invisibility */ |
636 |
– |
if (srcignore(m, r)) |
702 |
|
return(1); |
703 |
|
/* check for outside spot */ |
704 |
|
if (m->otype==MAT_SPOT && spotout(r, makespot(m))) |