7 |
|
* External symbols declared in source.h |
8 |
|
*/ |
9 |
|
|
10 |
– |
#include "copyright.h" |
11 |
– |
|
10 |
|
#include "ray.h" |
13 |
– |
|
11 |
|
#include "otypes.h" |
12 |
< |
|
16 |
< |
#include "otspecial.h" |
17 |
< |
|
12 |
> |
#include "rtotypes.h" |
13 |
|
#include "source.h" |
19 |
– |
|
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)) { |
66 |
|
} |
67 |
|
|
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 |
|
|
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 |
> |
extern int |
254 |
|
sourcehit( /* check to see if ray hit distant source */ |
255 |
< |
register RAY *r |
255 |
> |
register RAY *r |
256 |
|
) |
257 |
|
{ |
258 |
|
int first, last; |
290 |
|
} |
291 |
|
|
292 |
|
|
297 |
– |
#if SHADCACHE /* preemptive shadow checking */ |
298 |
– |
#define ABS(x) ((x)>0 ? (x) : -(x)) |
299 |
– |
|
300 |
– |
static void /* find closest blockers to source */ |
301 |
– |
initobscache(SRCREC *srcp) |
302 |
– |
{ |
303 |
– |
int i; |
304 |
– |
int cachelen; |
305 |
– |
|
306 |
– |
if (srcp->sflags & SDISTANT) |
307 |
– |
cachelen = 4*SHADCACHE*SHADCACHE; |
308 |
– |
else if (srcp->sflags & SFLAT) |
309 |
– |
cachelen = SHADCACHE*SHADCACHE*3 + (SHADCACHE&1)*SHADCACHE*4; |
310 |
– |
else /* spherical distribution */ |
311 |
– |
cachelen = SHADCACHE*SHADCACHE*6; |
312 |
– |
/* allocate cache */ |
313 |
– |
DCHECK(srcp->obscache != NULL, |
314 |
– |
CONSISTENCY, "initobscache() called twice"); |
315 |
– |
srcp->obscache = (OBSCACHE *)malloc(sizeof(OBSCACHE) + |
316 |
– |
sizeof(OBJECT)*(cachelen-1)); |
317 |
– |
if (srcp->obscache == NULL) |
318 |
– |
error(SYSTEM, "out of memory in initobscache()"); |
319 |
– |
/* set parameters */ |
320 |
– |
if (srcp->sflags & SDISTANT) { |
321 |
– |
int ax, ax1, ax2; |
322 |
– |
RREAL amax = 0; |
323 |
– |
for (ax1 = 3; ax1--; ) |
324 |
– |
if (ABS(srcp->sloc[ax1]) > amax) { |
325 |
– |
amax = ABS(srcp->sloc[ax1]); |
326 |
– |
ax = ax1; |
327 |
– |
} |
328 |
– |
srcp->obscache->p.d.ax = ax; |
329 |
– |
ax1 = (ax+1)%3; |
330 |
– |
ax2 = (ax+2)%3; |
331 |
– |
VCOPY(srcp->obscache->p.d.o, thescene.cuorg); |
332 |
– |
if (srcp->sloc[ax] > 0) |
333 |
– |
srcp->obscache->p.d.o[ax] += thescene.cusize; |
334 |
– |
if (srcp->sloc[ax1] < 0) |
335 |
– |
srcp->obscache->p.d.o[ax1] += thescene.cusize * |
336 |
– |
srcp->sloc[ax1] / ABS(srcp->sloc[ax]); |
337 |
– |
if (srcp->sloc[ax2] < 0) |
338 |
– |
srcp->obscache->p.d.o[ax2] += thescene.cusize * |
339 |
– |
srcp->sloc[ax2] / ABS(srcp->sloc[ax]); |
340 |
– |
srcp->obscache->p.d.e1 = (1.-FTINY) / (thescene.cusize*(1. + |
341 |
– |
fabs(srcp->sloc[ax1]/srcp->sloc[ax]))); |
342 |
– |
srcp->obscache->p.d.e2 = (1.-FTINY) / (thescene.cusize*(1. + |
343 |
– |
fabs(srcp->sloc[ax2]/srcp->sloc[ax]))); |
344 |
– |
} else if (srcp->sflags & SFLAT) { |
345 |
– |
VCOPY(srcp->obscache->p.f.u, srcp->ss[SU]); |
346 |
– |
normalize(srcp->obscache->p.f.u); |
347 |
– |
fcross(srcp->obscache->p.f.v, |
348 |
– |
srcp->snorm, srcp->obscache->p.f.u); |
349 |
– |
} |
350 |
– |
/* XXX Should cast rays from source */ |
351 |
– |
for (i = cachelen; i--; ) |
352 |
– |
srcp->obscache->obs[i] = OVOID; |
353 |
– |
} |
354 |
– |
|
355 |
– |
|
356 |
– |
static OBJECT * /* return occluder cache entry */ |
357 |
– |
srcobstructp(register RAY *r) |
358 |
– |
{ |
359 |
– |
static OBJECT noobs; |
360 |
– |
SRCREC *srcp; |
361 |
– |
int ondx; |
362 |
– |
|
363 |
– |
DCHECK(r->rsrc < 0, CONSISTENCY, |
364 |
– |
"srcobstructp() called with unaimed ray"); |
365 |
– |
noobs = OVOID; |
366 |
– |
srcp = &source[r->rsrc]; |
367 |
– |
if (srcp->obscache == NULL) /* initialize cache */ |
368 |
– |
initobscache(srcp); |
369 |
– |
/* compute cache index */ |
370 |
– |
if (srcp->sflags & SDISTANT) { |
371 |
– |
int ax, ax1, ax2; |
372 |
– |
double t; |
373 |
– |
ax = srcp->obscache->p.d.ax; |
374 |
– |
if ((ax1 = ax+1) >= 3) ax1 -= 3; |
375 |
– |
if ((ax2 = ax+2) >= 3) ax2 -= 3; |
376 |
– |
t = (srcp->obscache->p.d.o[ax] - r->rorg[ax]) / srcp->sloc[ax]; |
377 |
– |
if (t <= FTINY) |
378 |
– |
return &noobs; /* could happen if ray is outside */ |
379 |
– |
ondx = 2*SHADCACHE*(int)(2*SHADCACHE*srcp->obscache->p.d.e1 * |
380 |
– |
(r->rorg[ax1] + t*srcp->sloc[ax1] - |
381 |
– |
srcp->obscache->p.d.o[ax1])); |
382 |
– |
ondx += (int)(2*SHADCACHE*srcp->obscache->p.d.e2 * |
383 |
– |
(r->rorg[ax2] + t*srcp->sloc[ax2] - |
384 |
– |
srcp->obscache->p.d.o[ax2])); |
385 |
– |
if (ondx < 0 | ondx >= 4*SHADCACHE*SHADCACHE) |
386 |
– |
return &nobs; /* could happen if ray is outside */ |
387 |
– |
} else if (srcp->sflags & SFLAT) { |
388 |
– |
FVECT sd; |
389 |
– |
RREAL sd0m, sd1m; |
390 |
– |
sd[0] = -DOT(r->rdir, srcp->obscache->p.f.u); |
391 |
– |
sd[1] = -DOT(r->rdir, srcp->obscache->p.f.v); |
392 |
– |
sd[2] = -DOT(r->rdir, srcp->snorm); |
393 |
– |
if (sd[2] < 0) |
394 |
– |
return &noobs; /* shouldn't happen */ |
395 |
– |
sd0m = ABS(sd[0]); |
396 |
– |
sd1m = ABS(sd[1]); |
397 |
– |
if (sd[2] >= sd0m && sd[2] >= sd1m) { |
398 |
– |
ondx = SHADCACHE*(int)(SHADCACHE*(.5-FTINY) * |
399 |
– |
(1. + sd[0]/sd[2])); |
400 |
– |
ondx += (int)(SHADCACHE*(.5-FTINY) * |
401 |
– |
(1. + sd[1]/sd[2])); |
402 |
– |
} else if (sd0m >= sd1m) { |
403 |
– |
ondx = SHADCACHE*SHADCACHE; |
404 |
– |
if (sd[0] < 0) |
405 |
– |
ondx += ((SHADCACHE+1)>>1)*SHADCACHE; |
406 |
– |
ondx += SHADCACHE*(int)(SHADCACHE*(.5-FTINY) * |
407 |
– |
sd[2]/sd0m); |
408 |
– |
ondx += (int)(SHADCACHE*(.5-FTINY) * |
409 |
– |
(1. + sd[1]/sd0m)); |
410 |
– |
} else /* sd1m > sd0m */ { |
411 |
– |
ondx = SHADCACHE*SHADCACHE + |
412 |
– |
((SHADCACHE+1)>>1)*SHADCACHE*2; |
413 |
– |
if (sd[1] < 0) |
414 |
– |
ondx += ((SHADCACHE+1)>>1)*SHADCACHE; |
415 |
– |
ondx += SHADCACHE*(int)(SHADCACHE*(.5-FTINY) * |
416 |
– |
sd[2]/sd1m); |
417 |
– |
ondx += (int)(SHADCACHE*(.5-FTINY) * |
418 |
– |
(1. + sd[0]/sd1m)); |
419 |
– |
} |
420 |
– |
} else /* spherical distribution */ { |
421 |
– |
int ax, ax1, ax2; |
422 |
– |
RREAL amax = 0; |
423 |
– |
for (ax1 = 3; ax1--; ) |
424 |
– |
if (ABS(r->rdir[ax1]) > amax) { |
425 |
– |
amax = ABS(r->rdir[ax1]); |
426 |
– |
ax = ax1; |
427 |
– |
} |
428 |
– |
if ((ax1 = ax+1) >= 3) ax1 -= 3; |
429 |
– |
if ((ax2 = ax+2) >= 3) ax2 -= 3; |
430 |
– |
ondx = 2*SHADCACHE*SHADCACHE * ax; |
431 |
– |
if (r->rdir[ax] < 0) |
432 |
– |
ondx += SHADCACHE*SHADCACHE; |
433 |
– |
ondx += SHADCACHE*(int)(SHADCACHE*(.5-FTINY) * |
434 |
– |
(1. + r->rdir[ax1]/amax)); |
435 |
– |
ondx += (int)(SHADCACHE*(.5-FTINY) * |
436 |
– |
(1. + r->rdir[ax2]/amax)); |
437 |
– |
} |
438 |
– |
/* return cache pointer */ |
439 |
– |
return(&srcp->obscache->obs[ondx]); |
440 |
– |
} |
441 |
– |
|
442 |
– |
|
443 |
– |
void /* free obstruction cache */ |
444 |
– |
freeobscache(SRCREC *srcp) |
445 |
– |
{ |
446 |
– |
if (srcp->obscache == NULL) |
447 |
– |
return; |
448 |
– |
free((void *)srcp->obscache); |
449 |
– |
srcp->obscache = NULL; |
450 |
– |
} |
451 |
– |
|
452 |
– |
|
453 |
– |
void /* record a source blocker */ |
454 |
– |
srcblocker(register RAY *r) |
455 |
– |
{ |
456 |
– |
OBJREC *m; |
457 |
– |
|
458 |
– |
if (r->robj == OVOID || objptr(r->robj) != r->ro || |
459 |
– |
isvolume(r->ro->otype)) |
460 |
– |
return; /* don't record complex blockers */ |
461 |
– |
m = findmaterial(r->ro); |
462 |
– |
if (m == NULL) |
463 |
– |
return; /* no material?! */ |
464 |
– |
if (!(ofun[m->otype].flags & T_OPAQUE)) |
465 |
– |
return; /* material not a reliable blocker */ |
466 |
– |
|
467 |
– |
*srcobstructp(r) = r->robj; /* else record obstructor */ |
468 |
– |
} |
469 |
– |
|
470 |
– |
|
471 |
– |
int /* check ray against cached blocker */ |
472 |
– |
srcblocked(RAY *r) |
473 |
– |
{ |
474 |
– |
OBJECT obs = *srcobstructp(r); |
475 |
– |
OBJREC *op; |
476 |
– |
|
477 |
– |
if (obs == OVOID) |
478 |
– |
return(0); |
479 |
– |
op = objptr(obs); /* check for intersection */ |
480 |
– |
return ((*ofun[op->otype].funp)(op, r)); |
481 |
– |
} |
482 |
– |
|
483 |
– |
#endif |
484 |
– |
|
485 |
– |
|
293 |
|
static int |
294 |
|
cntcmp( /* contribution compare (descending) */ |
295 |
< |
const void *p1, |
296 |
< |
const void *p2 |
295 |
> |
const void *p1, |
296 |
> |
const void *p2 |
297 |
|
) |
298 |
|
{ |
299 |
|
register const CNTPTR *sc1 = (const CNTPTR *)p1; |
307 |
|
} |
308 |
|
|
309 |
|
|
310 |
< |
void |
310 |
> |
extern void |
311 |
|
direct( /* add direct component */ |
312 |
< |
RAY *r, /* ray that hit surface */ |
313 |
< |
void (*f)(), /* direct component coefficient function */ |
314 |
< |
char *p /* data for f */ |
312 |
> |
RAY *r, /* ray that hit surface */ |
313 |
> |
srcdirf_t *f, /* direct component coefficient function */ |
314 |
> |
void *p /* data for f */ |
315 |
|
) |
316 |
|
{ |
510 |
– |
extern void (*trace)(); |
317 |
|
register int sn; |
318 |
|
register CONTRIB *scp; |
319 |
|
SRCINDEX si; |
414 |
|
if (bright(sr.rcol) <= FTINY) { |
415 |
|
#if SHADCACHE |
416 |
|
if ((scp <= srccnt || scp[-1].sno != scp->sno) |
417 |
< |
&& (scp >= srccnt+ncnts || |
417 |
> |
&& (scp >= srccnt+ncnts-1 || |
418 |
|
scp[1].sno != scp->sno)) |
419 |
|
srcblocker(&sr); |
420 |
|
#endif |
451 |
|
} |
452 |
|
|
453 |
|
|
454 |
< |
void |
454 |
> |
extern void |
455 |
|
srcscatter( /* compute source scattering into ray */ |
456 |
< |
register RAY *r |
456 |
> |
register RAY *r |
457 |
|
) |
458 |
|
{ |
459 |
|
int oldsampndx; |
499 |
|
if (!srcray(&sr, NULL, &si) || |
500 |
|
sr.rsrc != r->slights[i]) |
501 |
|
continue; /* no path */ |
502 |
+ |
#if SHADCACHE |
503 |
+ |
if (srcblocked(&sr)) /* check shadow cache */ |
504 |
+ |
continue; |
505 |
+ |
#endif |
506 |
|
copycolor(sr.cext, r->cext); |
507 |
|
copycolor(sr.albedo, r->albedo); |
508 |
|
sr.gecc = r->gecc; |
509 |
|
sr.slights = r->slights; |
510 |
|
rayvalue(&sr); /* eval. source ray */ |
511 |
< |
if (bright(sr.rcol) <= FTINY) |
511 |
> |
if (bright(sr.rcol) <= FTINY) { |
512 |
> |
#if SHADCACHE |
513 |
> |
srcblocker(&sr); /* add blocker to cache */ |
514 |
> |
#endif |
515 |
|
continue; |
516 |
+ |
} |
517 |
|
if (r->gecc <= FTINY) /* compute P(theta) */ |
518 |
|
d = 1.; |
519 |
|
else { |
551 |
|
*/ |
552 |
|
|
553 |
|
static int |
554 |
< |
weaksrcmat(int obj) /* identify material */ |
554 |
> |
weaksrcmat(OBJECT obj) /* identify material */ |
555 |
|
{ |
556 |
< |
register OBJREC *o = objptr(obj); |
556 |
> |
OBJREC *o = findmaterial(objptr(obj)); |
557 |
|
|
558 |
< |
while (!ismaterial(o->otype)) /* find material */ |
745 |
< |
o = objptr(o->omod); |
558 |
> |
if (o == NULL) return 0; |
559 |
|
return((o->otype==MAT_ILLUM)|(o->otype==MAT_GLOW)); |
560 |
|
} |
561 |
|
|
617 |
|
distglow(m, r, raydist(r,PRIMARY))) |
618 |
|
|
619 |
|
|
620 |
< |
int |
620 |
> |
extern int |
621 |
|
m_light( /* ray hit a light source */ |
622 |
< |
register OBJREC *m, |
623 |
< |
register RAY *r |
622 |
> |
register OBJREC *m, |
623 |
> |
register RAY *r |
624 |
|
) |
625 |
|
{ |
626 |
|
/* check for over-counting */ |