8 |
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*/ |
9 |
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|
10 |
|
#include "ray.h" |
11 |
– |
|
11 |
|
#include "otypes.h" |
12 |
< |
|
12 |
> |
#include "rtotypes.h" |
13 |
|
#include "source.h" |
15 |
– |
|
14 |
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#include "random.h" |
15 |
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|
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 |
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|
42 |
+ |
static int cntcmp(const void *p1, const void *p2); |
43 |
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|
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)) { |
66 |
|
} |
67 |
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|
68 |
|
|
69 |
< |
void |
70 |
< |
marksources() /* find and mark source objects */ |
69 |
> |
extern void |
70 |
> |
marksources(void) /* find and mark source objects */ |
71 |
|
{ |
72 |
|
int foundsource = 0; |
73 |
|
int i; |
83 |
|
if (!issurface(o->otype) || o->omod == OVOID) |
84 |
|
continue; |
85 |
|
/* find material */ |
86 |
< |
m = findmaterial(o); |
86 |
> |
m = findmaterial(objptr(o->omod)); |
87 |
|
if (m == NULL || !islight(m->otype)) |
88 |
|
continue; /* not source modifier */ |
89 |
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|
125 |
|
} |
126 |
|
} |
127 |
|
#if SHADCACHE |
128 |
< |
source[ns].obscache = NULL; |
128 |
> |
initobscache(ns); |
129 |
|
#endif |
130 |
|
if (!(source[ns].sflags & SSKIP)) |
131 |
|
foundsource++; |
147 |
|
} |
148 |
|
|
149 |
|
|
150 |
< |
void |
151 |
< |
freesources() /* free all source structures */ |
150 |
> |
extern void |
151 |
> |
freesources(void) /* free all source structures */ |
152 |
|
{ |
153 |
|
if (nsources > 0) { |
154 |
|
#if SHADCACHE |
169 |
|
} |
170 |
|
|
171 |
|
|
172 |
< |
int |
172 |
> |
extern int |
173 |
|
srcray( /* send a ray to a source, return domega */ |
174 |
< |
register RAY *sr, /* returned source ray */ |
175 |
< |
RAY *r, /* ray which hit object */ |
176 |
< |
SRCINDEX *si /* source sample index */ |
174 |
> |
register RAY *sr, /* returned source ray */ |
175 |
> |
RAY *r, /* ray which hit object */ |
176 |
> |
SRCINDEX *si /* source sample index */ |
177 |
|
) |
178 |
|
{ |
179 |
|
double d; /* distance to source */ |
208 |
|
} |
209 |
|
|
210 |
|
|
211 |
< |
void |
211 |
> |
extern void |
212 |
|
srcvalue( /* punch ray to source and compute value */ |
213 |
< |
register RAY *r |
213 |
> |
register RAY *r |
214 |
|
) |
215 |
|
{ |
216 |
|
register SRCREC *sp; |
250 |
|
} |
251 |
|
|
252 |
|
|
253 |
< |
int |
253 |
> |
static int |
254 |
> |
transillum( /* check if material is transparent illum */ |
255 |
> |
OBJECT obj |
256 |
> |
) |
257 |
> |
{ |
258 |
> |
OBJREC *m = findmaterial(objptr(obj)); |
259 |
> |
|
260 |
> |
if (m == NULL) |
261 |
> |
return(1); |
262 |
> |
if (m->otype != MAT_ILLUM) |
263 |
> |
return(0); |
264 |
> |
return(!m->oargs.nsargs || !strcmp(m->oargs.sarg[0], VOIDID)); |
265 |
> |
} |
266 |
> |
|
267 |
> |
|
268 |
> |
extern int |
269 |
|
sourcehit( /* check to see if ray hit distant source */ |
270 |
< |
register RAY *r |
270 |
> |
register RAY *r |
271 |
|
) |
272 |
|
{ |
273 |
+ |
int glowsrc = -1; |
274 |
+ |
int transrc = -1; |
275 |
|
int first, last; |
276 |
|
register int i; |
277 |
|
|
280 |
|
} else { /* otherwise check all */ |
281 |
|
first = 0; last = nsources-1; |
282 |
|
} |
283 |
< |
for (i = first; i <= last; i++) |
284 |
< |
if ((source[i].sflags & (SDISTANT|SVIRTUAL)) == SDISTANT) |
285 |
< |
/* |
286 |
< |
* Check to see if ray is within |
287 |
< |
* solid angle of source. |
288 |
< |
*/ |
289 |
< |
if (2.0*PI * (1.0 - DOT(source[i].sloc,r->rdir)) |
290 |
< |
<= source[i].ss2) { |
291 |
< |
r->ro = source[i].so; |
292 |
< |
if (!(source[i].sflags & SSKIP)) |
293 |
< |
break; |
294 |
< |
} |
295 |
< |
|
296 |
< |
if (r->ro != NULL) { |
297 |
< |
r->robj = objndx(r->ro); |
298 |
< |
for (i = 0; i < 3; i++) |
299 |
< |
r->ron[i] = -r->rdir[i]; |
300 |
< |
r->rod = 1.0; |
301 |
< |
r->pert[0] = r->pert[1] = r->pert[2] = 0.0; |
302 |
< |
r->uv[0] = r->uv[1] = 0.0; |
303 |
< |
r->rox = NULL; |
304 |
< |
return(1); |
283 |
> |
for (i = first; i <= last; i++) { |
284 |
> |
if ((source[i].sflags & (SDISTANT|SVIRTUAL)) != SDISTANT) |
285 |
> |
continue; |
286 |
> |
/* |
287 |
> |
* Check to see if ray is within |
288 |
> |
* solid angle of source. |
289 |
> |
*/ |
290 |
> |
if (2.*PI*(1. - DOT(source[i].sloc,r->rdir)) > source[i].ss2) |
291 |
> |
continue; |
292 |
> |
/* is it the only possibility? */ |
293 |
> |
if (first == last) { |
294 |
> |
r->ro = source[i].so; |
295 |
> |
break; |
296 |
> |
} |
297 |
> |
/* |
298 |
> |
* If it's a glow or transparent illum, just remember it. |
299 |
> |
*/ |
300 |
> |
if (source[i].sflags & SSKIP) { |
301 |
> |
glowsrc = i; |
302 |
> |
continue; |
303 |
> |
} |
304 |
> |
if (transillum(source[i].so->omod)) { |
305 |
> |
transrc = i; |
306 |
> |
continue; |
307 |
> |
} |
308 |
> |
r->ro = source[i].so; /* otherwise, use first hit */ |
309 |
> |
break; |
310 |
|
} |
311 |
< |
return(0); |
311 |
> |
/* |
312 |
> |
* Do we need fallback? |
313 |
> |
*/ |
314 |
> |
if (r->ro == NULL) { |
315 |
> |
if (transrc >= 0 && r->crtype & (AMBIENT|SPECULAR)) |
316 |
> |
return(0); /* avoid overcounting */ |
317 |
> |
if (glowsrc >= 0) |
318 |
> |
r->ro = source[glowsrc].so; |
319 |
> |
else |
320 |
> |
return(0); /* nothing usable */ |
321 |
> |
} |
322 |
> |
/* |
323 |
> |
* Make assignments. |
324 |
> |
*/ |
325 |
> |
r->robj = objndx(r->ro); |
326 |
> |
for (i = 0; i < 3; i++) |
327 |
> |
r->ron[i] = -r->rdir[i]; |
328 |
> |
r->rod = 1.0; |
329 |
> |
r->pert[0] = r->pert[1] = r->pert[2] = 0.0; |
330 |
> |
r->uv[0] = r->uv[1] = 0.0; |
331 |
> |
r->rox = NULL; |
332 |
> |
return(1); |
333 |
|
} |
334 |
|
|
335 |
|
|
336 |
|
static int |
337 |
|
cntcmp( /* contribution compare (descending) */ |
338 |
< |
const void *p1, |
339 |
< |
const void *p2 |
338 |
> |
const void *p1, |
339 |
> |
const void *p2 |
340 |
|
) |
341 |
|
{ |
342 |
|
register const CNTPTR *sc1 = (const CNTPTR *)p1; |
350 |
|
} |
351 |
|
|
352 |
|
|
353 |
< |
void |
353 |
> |
extern void |
354 |
|
direct( /* add direct component */ |
355 |
< |
RAY *r, /* ray that hit surface */ |
356 |
< |
void (*f)(), /* direct component coefficient function */ |
357 |
< |
char *p /* data for f */ |
355 |
> |
RAY *r, /* ray that hit surface */ |
356 |
> |
srcdirf_t *f, /* direct component coefficient function */ |
357 |
> |
void *p /* data for f */ |
358 |
|
) |
359 |
|
{ |
317 |
– |
extern void (*trace)(); |
360 |
|
register int sn; |
361 |
|
register CONTRIB *scp; |
362 |
|
SRCINDEX si; |
494 |
|
} |
495 |
|
|
496 |
|
|
497 |
< |
void |
497 |
> |
extern void |
498 |
|
srcscatter( /* compute source scattering into ray */ |
499 |
< |
register RAY *r |
499 |
> |
register RAY *r |
500 |
|
) |
501 |
|
{ |
502 |
|
int oldsampndx; |
542 |
|
if (!srcray(&sr, NULL, &si) || |
543 |
|
sr.rsrc != r->slights[i]) |
544 |
|
continue; /* no path */ |
545 |
+ |
#if SHADCACHE |
546 |
+ |
if (srcblocked(&sr)) /* check shadow cache */ |
547 |
+ |
continue; |
548 |
+ |
#endif |
549 |
|
copycolor(sr.cext, r->cext); |
550 |
|
copycolor(sr.albedo, r->albedo); |
551 |
|
sr.gecc = r->gecc; |
552 |
|
sr.slights = r->slights; |
553 |
|
rayvalue(&sr); /* eval. source ray */ |
554 |
< |
if (bright(sr.rcol) <= FTINY) |
554 |
> |
if (bright(sr.rcol) <= FTINY) { |
555 |
> |
#if SHADCACHE |
556 |
> |
srcblocker(&sr); /* add blocker to cache */ |
557 |
> |
#endif |
558 |
|
continue; |
559 |
+ |
} |
560 |
|
if (r->gecc <= FTINY) /* compute P(theta) */ |
561 |
|
d = 1.; |
562 |
|
else { |
594 |
|
*/ |
595 |
|
|
596 |
|
static int |
597 |
< |
weaksrcmat(int obj) /* identify material */ |
597 |
> |
weaksrcmat(OBJECT obj) /* identify material */ |
598 |
|
{ |
599 |
< |
register OBJREC *o = objptr(obj); |
599 |
> |
OBJREC *m = findmaterial(objptr(obj)); |
600 |
|
|
601 |
< |
while (!ismaterial(o->otype)) /* find material */ |
602 |
< |
o = objptr(o->omod); |
553 |
< |
return((o->otype==MAT_ILLUM)|(o->otype==MAT_GLOW)); |
601 |
> |
if (m == NULL) return(0); |
602 |
> |
return((m->otype==MAT_ILLUM) | (m->otype==MAT_GLOW)); |
603 |
|
} |
604 |
|
|
605 |
|
#define illumblock(m, r) (!(source[r->rsrc].sflags&SVIRTUAL) && \ |
660 |
|
distglow(m, r, raydist(r,PRIMARY))) |
661 |
|
|
662 |
|
|
663 |
< |
int |
663 |
> |
extern int |
664 |
|
m_light( /* ray hit a light source */ |
665 |
< |
register OBJREC *m, |
666 |
< |
register RAY *r |
665 |
> |
register OBJREC *m, |
666 |
> |
register RAY *r |
667 |
|
) |
668 |
|
{ |
669 |
|
/* check for over-counting */ |