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#ifndef lint |
| 2 |
< |
static const char RCSid[] = "$Id$"; |
| 2 |
> |
static const char RCSid[] = "$Id$"; |
| 3 |
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#endif |
| 4 |
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/* |
| 5 |
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* source.c - routines dealing with illumination sources. |
| 7 |
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* External symbols declared in source.h |
| 8 |
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*/ |
| 9 |
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|
| 10 |
– |
#include "copyright.h" |
| 11 |
– |
|
| 10 |
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#include "ray.h" |
| 13 |
– |
|
| 11 |
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#include "otypes.h" |
| 12 |
< |
|
| 12 |
> |
#include "rtotypes.h" |
| 13 |
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#include "source.h" |
| 17 |
– |
|
| 14 |
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#include "random.h" |
| 15 |
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|
| 16 |
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extern double ssampdist; /* scatter sampling distance */ |
| 39 |
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static CNTPTR *cntord; /* source ordering in direct() */ |
| 40 |
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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 |
< |
void |
| 45 |
< |
marksources() /* find and mark source objects */ |
| 44 |
> |
|
| 45 |
> |
extern OBJREC * /* find an object's actual material */ |
| 46 |
> |
findmaterial(register OBJREC *o) |
| 47 |
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{ |
| 48 |
+ |
while (!ismaterial(o->otype)) { |
| 49 |
+ |
if (o->otype == MOD_ALIAS && o->oargs.nsargs) { |
| 50 |
+ |
OBJECT aobj; |
| 51 |
+ |
OBJREC *ao; |
| 52 |
+ |
aobj = lastmod(objndx(o), o->oargs.sarg[0]); |
| 53 |
+ |
if (aobj < 0) |
| 54 |
+ |
objerror(o, USER, "bad reference"); |
| 55 |
+ |
ao = objptr(aobj); |
| 56 |
+ |
if (ismaterial(ao->otype)) |
| 57 |
+ |
return(ao); |
| 58 |
+ |
} |
| 59 |
+ |
if (o->omod == OVOID) |
| 60 |
+ |
return(NULL); |
| 61 |
+ |
o = objptr(o->omod); |
| 62 |
+ |
} |
| 63 |
+ |
return(o); /* mixtures will return NULL */ |
| 64 |
+ |
} |
| 65 |
+ |
|
| 66 |
+ |
|
| 67 |
+ |
extern void |
| 68 |
+ |
marksources(void) /* find and mark source objects */ |
| 69 |
+ |
{ |
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int foundsource = 0; |
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int i; |
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register OBJREC *o, *m; |
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/* initialize dispatch table */ |
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initstypes(); |
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/* find direct sources */ |
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< |
for (i = 0; i < nobjects; i++) { |
| 77 |
> |
for (i = 0; i < nsceneobjs; i++) { |
| 78 |
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|
| 79 |
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o = objptr(i); |
| 80 |
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|
| 81 |
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if (!issurface(o->otype) || o->omod == OVOID) |
| 82 |
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continue; |
| 83 |
< |
|
| 84 |
< |
m = objptr(o->omod); |
| 85 |
< |
|
| 86 |
< |
if (!islight(m->otype)) |
| 67 |
< |
continue; |
| 83 |
> |
/* find material */ |
| 84 |
> |
m = findmaterial(objptr(o->omod)); |
| 85 |
> |
if (m == NULL || !islight(m->otype)) |
| 86 |
> |
continue; /* not source modifier */ |
| 87 |
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|
| 88 |
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if (m->oargs.nfargs != (m->otype == MAT_GLOW ? 4 : |
| 89 |
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m->otype == MAT_SPOT ? 7 : 3)) |
| 122 |
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source[ns].sflags |= SSKIP; |
| 123 |
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} |
| 124 |
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} |
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+ |
#if SHADCACHE |
| 126 |
+ |
initobscache(ns); |
| 127 |
+ |
#endif |
| 128 |
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if (!(source[ns].sflags & SSKIP)) |
| 129 |
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foundsource++; |
| 130 |
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} |
| 137 |
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maxcntr = nsources + MAXSPART; /* start with this many */ |
| 138 |
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srccnt = (CONTRIB *)malloc(maxcntr*sizeof(CONTRIB)); |
| 139 |
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cntord = (CNTPTR *)malloc(maxcntr*sizeof(CNTPTR)); |
| 140 |
< |
if (srccnt == NULL | cntord == NULL) |
| 140 |
> |
if ((srccnt == NULL) | (cntord == NULL)) |
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goto memerr; |
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return; |
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memerr: |
| 145 |
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} |
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|
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< |
void |
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< |
freesources() /* free all source structures */ |
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> |
extern void |
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> |
freesources(void) /* free all source structures */ |
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{ |
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if (nsources > 0) { |
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+ |
#if SHADCACHE |
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+ |
while (nsources--) |
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+ |
freeobscache(&source[nsources]); |
| 155 |
+ |
#endif |
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free((void *)source); |
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source = NULL; |
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nsources = 0; |
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} |
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|
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< |
int |
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< |
srcray(sr, r, si) /* send a ray to a source, return domega */ |
| 172 |
< |
register RAY *sr; /* returned source ray */ |
| 173 |
< |
RAY *r; /* ray which hit object */ |
| 174 |
< |
SRCINDEX *si; /* source sample index */ |
| 170 |
> |
extern int |
| 171 |
> |
srcray( /* send a ray to a source, return domega */ |
| 172 |
> |
register RAY *sr, /* returned source ray */ |
| 173 |
> |
RAY *r, /* ray which hit object */ |
| 174 |
> |
SRCINDEX *si /* source sample index */ |
| 175 |
> |
) |
| 176 |
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{ |
| 177 |
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double d; /* distance to source */ |
| 178 |
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register SRCREC *srcp; |
| 179 |
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|
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< |
rayorigin(sr, r, SHADOW, 1.0); /* ignore limits */ |
| 180 |
> |
rayorigin(sr, SHADOW, r, NULL); /* ignore limits */ |
| 181 |
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|
| 182 |
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while ((d = nextssamp(sr, si)) != 0.0) { |
| 183 |
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sr->rsrc = si->sn; /* remember source */ |
| 206 |
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} |
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| 208 |
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< |
void |
| 210 |
< |
srcvalue(r) /* punch ray to source and compute value */ |
| 211 |
< |
register RAY *r; |
| 209 |
> |
extern void |
| 210 |
> |
srcvalue( /* punch ray to source and compute value */ |
| 211 |
> |
register RAY *r |
| 212 |
> |
) |
| 213 |
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{ |
| 214 |
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register SRCREC *sp; |
| 215 |
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|
| 248 |
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} |
| 249 |
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| 250 |
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|
| 251 |
< |
int |
| 252 |
< |
sourcehit(r) /* check to see if ray hit distant source */ |
| 253 |
< |
register RAY *r; |
| 251 |
> |
static int |
| 252 |
> |
transillum( /* check if material is transparent illum */ |
| 253 |
> |
OBJECT obj |
| 254 |
> |
) |
| 255 |
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{ |
| 256 |
+ |
OBJREC *m = findmaterial(objptr(obj)); |
| 257 |
+ |
|
| 258 |
+ |
if (m == NULL) |
| 259 |
+ |
return(1); |
| 260 |
+ |
if (m->otype != MAT_ILLUM) |
| 261 |
+ |
return(0); |
| 262 |
+ |
return(!m->oargs.nsargs || !strcmp(m->oargs.sarg[0], VOIDID)); |
| 263 |
+ |
} |
| 264 |
+ |
|
| 265 |
+ |
|
| 266 |
+ |
extern int |
| 267 |
+ |
sourcehit( /* check to see if ray hit distant source */ |
| 268 |
+ |
register RAY *r |
| 269 |
+ |
) |
| 270 |
+ |
{ |
| 271 |
+ |
int glowsrc = -1; |
| 272 |
+ |
int transrc = -1; |
| 273 |
|
int first, last; |
| 274 |
|
register int i; |
| 275 |
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|
| 278 |
|
} else { /* otherwise check all */ |
| 279 |
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first = 0; last = nsources-1; |
| 280 |
|
} |
| 281 |
< |
for (i = first; i <= last; i++) |
| 282 |
< |
if ((source[i].sflags & (SDISTANT|SVIRTUAL)) == SDISTANT) |
| 283 |
< |
/* |
| 284 |
< |
* Check to see if ray is within |
| 285 |
< |
* solid angle of source. |
| 286 |
< |
*/ |
| 287 |
< |
if (2.0*PI * (1.0 - DOT(source[i].sloc,r->rdir)) |
| 288 |
< |
<= source[i].ss2) { |
| 289 |
< |
r->ro = source[i].so; |
| 290 |
< |
if (!(source[i].sflags & SSKIP)) |
| 291 |
< |
break; |
| 292 |
< |
} |
| 293 |
< |
|
| 294 |
< |
if (r->ro != NULL) { |
| 295 |
< |
r->robj = objndx(r->ro); |
| 296 |
< |
for (i = 0; i < 3; i++) |
| 297 |
< |
r->ron[i] = -r->rdir[i]; |
| 298 |
< |
r->rod = 1.0; |
| 299 |
< |
r->rox = NULL; |
| 300 |
< |
return(1); |
| 281 |
> |
for (i = first; i <= last; i++) { |
| 282 |
> |
if ((source[i].sflags & (SDISTANT|SVIRTUAL)) != SDISTANT) |
| 283 |
> |
continue; |
| 284 |
> |
/* |
| 285 |
> |
* Check to see if ray is within |
| 286 |
> |
* solid angle of source. |
| 287 |
> |
*/ |
| 288 |
> |
if (2.*PI*(1. - DOT(source[i].sloc,r->rdir)) > source[i].ss2) |
| 289 |
> |
continue; |
| 290 |
> |
/* is it the only possibility? */ |
| 291 |
> |
if (first == last) { |
| 292 |
> |
r->ro = source[i].so; |
| 293 |
> |
break; |
| 294 |
> |
} |
| 295 |
> |
/* |
| 296 |
> |
* If it's a glow or transparent illum, just remember it. |
| 297 |
> |
*/ |
| 298 |
> |
if (source[i].sflags & SSKIP) { |
| 299 |
> |
glowsrc = i; |
| 300 |
> |
continue; |
| 301 |
> |
} |
| 302 |
> |
if (transillum(source[i].so->omod)) { |
| 303 |
> |
transrc = i; |
| 304 |
> |
continue; |
| 305 |
> |
} |
| 306 |
> |
r->ro = source[i].so; /* otherwise, use first hit */ |
| 307 |
> |
break; |
| 308 |
|
} |
| 309 |
< |
return(0); |
| 309 |
> |
/* |
| 310 |
> |
* Do we need fallback? |
| 311 |
> |
*/ |
| 312 |
> |
if (r->ro == NULL) { |
| 313 |
> |
if (transrc >= 0 && r->crtype & (AMBIENT|SPECULAR)) |
| 314 |
> |
return(0); /* avoid overcounting */ |
| 315 |
> |
if (glowsrc >= 0) |
| 316 |
> |
r->ro = source[glowsrc].so; |
| 317 |
> |
else |
| 318 |
> |
return(0); /* nothing usable */ |
| 319 |
> |
} |
| 320 |
> |
/* |
| 321 |
> |
* Make assignments. |
| 322 |
> |
*/ |
| 323 |
> |
r->robj = objndx(r->ro); |
| 324 |
> |
for (i = 0; i < 3; i++) |
| 325 |
> |
r->ron[i] = -r->rdir[i]; |
| 326 |
> |
r->rod = 1.0; |
| 327 |
> |
r->pert[0] = r->pert[1] = r->pert[2] = 0.0; |
| 328 |
> |
r->uv[0] = r->uv[1] = 0.0; |
| 329 |
> |
r->rox = NULL; |
| 330 |
> |
return(1); |
| 331 |
|
} |
| 332 |
|
|
| 333 |
|
|
| 334 |
|
static int |
| 335 |
< |
cntcmp(sc1, sc2) /* contribution compare (descending) */ |
| 336 |
< |
register CNTPTR *sc1, *sc2; |
| 335 |
> |
cntcmp( /* contribution compare (descending) */ |
| 336 |
> |
const void *p1, |
| 337 |
> |
const void *p2 |
| 338 |
> |
) |
| 339 |
|
{ |
| 340 |
+ |
register const CNTPTR *sc1 = (const CNTPTR *)p1; |
| 341 |
+ |
register const CNTPTR *sc2 = (const CNTPTR *)p2; |
| 342 |
+ |
|
| 343 |
|
if (sc1->brt > sc2->brt) |
| 344 |
|
return(-1); |
| 345 |
|
if (sc1->brt < sc2->brt) |
| 348 |
|
} |
| 349 |
|
|
| 350 |
|
|
| 351 |
< |
void |
| 352 |
< |
direct(r, f, p) /* add direct component */ |
| 353 |
< |
RAY *r; /* ray that hit surface */ |
| 354 |
< |
void (*f)(); /* direct component coefficient function */ |
| 355 |
< |
char *p; /* data for f */ |
| 351 |
> |
extern void |
| 352 |
> |
direct( /* add direct component */ |
| 353 |
> |
RAY *r, /* ray that hit surface */ |
| 354 |
> |
srcdirf_t *f, /* direct component coefficient function */ |
| 355 |
> |
void *p /* data for f */ |
| 356 |
> |
) |
| 357 |
|
{ |
| 278 |
– |
extern void (*trace)(); |
| 358 |
|
register int sn; |
| 359 |
|
register CONTRIB *scp; |
| 360 |
|
SRCINDEX si; |
| 370 |
|
for (sn = 0; srcray(&sr, r, &si); sn++) { |
| 371 |
|
if (sn >= maxcntr) { |
| 372 |
|
maxcntr = sn + MAXSPART; |
| 373 |
< |
srccnt = (CONTRIB *)realloc((char *)srccnt, |
| 373 |
> |
srccnt = (CONTRIB *)realloc((void *)srccnt, |
| 374 |
|
maxcntr*sizeof(CONTRIB)); |
| 375 |
< |
cntord = (CNTPTR *)realloc((char *)cntord, |
| 375 |
> |
cntord = (CNTPTR *)realloc((void *)cntord, |
| 376 |
|
maxcntr*sizeof(CNTPTR)); |
| 377 |
< |
if (srccnt == NULL | cntord == NULL) |
| 377 |
> |
if ((srccnt == NULL) | (cntord == NULL)) |
| 378 |
|
error(SYSTEM, "out of memory in direct"); |
| 379 |
|
} |
| 380 |
|
cntord[sn].sndx = sn; |
| 382 |
|
scp->sno = sr.rsrc; |
| 383 |
|
/* compute coefficient */ |
| 384 |
|
(*f)(scp->coef, p, sr.rdir, si.dom); |
| 385 |
< |
cntord[sn].brt = bright(scp->coef); |
| 385 |
> |
cntord[sn].brt = intens(scp->coef); |
| 386 |
|
if (cntord[sn].brt <= 0.0) |
| 387 |
|
continue; |
| 388 |
+ |
#if SHADCACHE |
| 389 |
+ |
/* check shadow cache */ |
| 390 |
+ |
if (si.np == 1 && srcblocked(&sr)) { |
| 391 |
+ |
cntord[sn].brt = 0.0; |
| 392 |
+ |
continue; |
| 393 |
+ |
} |
| 394 |
+ |
#endif |
| 395 |
|
VCOPY(scp->dir, sr.rdir); |
| 396 |
+ |
copycolor(sr.rcoef, scp->coef); |
| 397 |
|
/* compute potential */ |
| 398 |
|
sr.revf = srcvalue; |
| 399 |
|
rayvalue(&sr); |
| 400 |
+ |
multcolor(sr.rcol, sr.rcoef); |
| 401 |
|
copycolor(scp->val, sr.rcol); |
| 402 |
< |
multcolor(scp->val, scp->coef); |
| 315 |
< |
cntord[sn].brt = bright(scp->val); |
| 402 |
> |
cntord[sn].brt = intens(sr.rcol); |
| 403 |
|
} |
| 404 |
|
/* sort contributions */ |
| 405 |
|
qsort(cntord, sn, sizeof(CNTPTR), cntcmp); |
| 437 |
|
break; |
| 438 |
|
scp = srccnt + cntord[sn].sndx; |
| 439 |
|
/* test for hit */ |
| 440 |
< |
rayorigin(&sr, r, SHADOW, 1.0); |
| 440 |
> |
rayorigin(&sr, SHADOW, r, NULL); |
| 441 |
> |
copycolor(sr.rcoef, scp->coef); |
| 442 |
|
VCOPY(sr.rdir, scp->dir); |
| 443 |
|
sr.rsrc = scp->sno; |
| 444 |
< |
source[scp->sno].ntests++; /* keep statistics */ |
| 444 |
> |
/* keep statistics */ |
| 445 |
> |
if (source[scp->sno].ntests++ > 0xfffffff0) { |
| 446 |
> |
source[scp->sno].ntests >>= 1; |
| 447 |
> |
source[scp->sno].nhits >>= 1; |
| 448 |
> |
} |
| 449 |
|
if (localhit(&sr, &thescene) && |
| 450 |
|
( sr.ro != source[scp->sno].so || |
| 451 |
|
source[scp->sno].sflags & SFOLLOW )) { |
| 452 |
|
/* follow entire path */ |
| 453 |
|
raycont(&sr); |
| 362 |
– |
rayparticipate(&sr); |
| 454 |
|
if (trace != NULL) |
| 455 |
|
(*trace)(&sr); /* trace execution */ |
| 456 |
< |
if (bright(sr.rcol) <= FTINY) |
| 456 |
> |
rayparticipate(&sr); |
| 457 |
> |
if (bright(sr.rcol) <= FTINY) { |
| 458 |
> |
#if SHADCACHE |
| 459 |
> |
if ((scp <= srccnt || scp[-1].sno != scp->sno) |
| 460 |
> |
&& (scp >= srccnt+ncnts-1 || |
| 461 |
> |
scp[1].sno != scp->sno)) |
| 462 |
> |
srcblocker(&sr); |
| 463 |
> |
#endif |
| 464 |
|
continue; /* missed! */ |
| 465 |
+ |
} |
| 466 |
+ |
multcolor(sr.rcol, sr.rcoef); |
| 467 |
|
copycolor(scp->val, sr.rcol); |
| 468 |
< |
multcolor(scp->val, scp->coef); |
| 468 |
> |
} else if (trace != NULL && |
| 469 |
> |
(source[scp->sno].sflags & (SDISTANT|SVIRTUAL|SFOLLOW)) |
| 470 |
> |
== (SDISTANT|SFOLLOW) && |
| 471 |
> |
sourcehit(&sr) && rayshade(&sr, sr.ro->omod)) { |
| 472 |
> |
(*trace)(&sr); /* trace execution */ |
| 473 |
> |
/* skip call to rayparticipate() & scp->val update */ |
| 474 |
|
} |
| 475 |
|
/* add contribution if hit */ |
| 476 |
|
addcolor(r->rcol, scp->val); |
| 492 |
|
scp = srccnt + cntord[sn].sndx; |
| 493 |
|
prob = hwt * (double)source[scp->sno].nhits / |
| 494 |
|
(double)source[scp->sno].ntests; |
| 495 |
< |
if (prob > 1.0) |
| 496 |
< |
prob = 1.0; |
| 392 |
< |
scalecolor(scp->val, prob); |
| 495 |
> |
if (prob < 1.0) |
| 496 |
> |
scalecolor(scp->val, prob); |
| 497 |
|
addcolor(r->rcol, scp->val); |
| 498 |
|
} |
| 499 |
|
} |
| 500 |
|
|
| 501 |
|
|
| 502 |
< |
void |
| 503 |
< |
srcscatter(r) /* compute source scattering into ray */ |
| 504 |
< |
register RAY *r; |
| 502 |
> |
extern void |
| 503 |
> |
srcscatter( /* compute source scattering into ray */ |
| 504 |
> |
register RAY *r |
| 505 |
> |
) |
| 506 |
|
{ |
| 507 |
|
int oldsampndx; |
| 508 |
|
int nsamps; |
| 547 |
|
if (!srcray(&sr, NULL, &si) || |
| 548 |
|
sr.rsrc != r->slights[i]) |
| 549 |
|
continue; /* no path */ |
| 550 |
+ |
#if SHADCACHE |
| 551 |
+ |
if (srcblocked(&sr)) /* check shadow cache */ |
| 552 |
+ |
continue; |
| 553 |
+ |
#endif |
| 554 |
|
copycolor(sr.cext, r->cext); |
| 555 |
|
copycolor(sr.albedo, r->albedo); |
| 556 |
|
sr.gecc = r->gecc; |
| 557 |
|
sr.slights = r->slights; |
| 558 |
|
rayvalue(&sr); /* eval. source ray */ |
| 559 |
< |
if (bright(sr.rcol) <= FTINY) |
| 559 |
> |
if (bright(sr.rcol) <= FTINY) { |
| 560 |
> |
#if SHADCACHE |
| 561 |
> |
srcblocker(&sr); /* add blocker to cache */ |
| 562 |
> |
#endif |
| 563 |
|
continue; |
| 564 |
+ |
} |
| 565 |
|
if (r->gecc <= FTINY) /* compute P(theta) */ |
| 566 |
|
d = 1.; |
| 567 |
|
else { |
| 598 |
|
* geometry behind (or inside) an effective radiator. |
| 599 |
|
*/ |
| 600 |
|
|
| 601 |
< |
static int weaksrcmod(obj) int obj; /* efficiency booster function */ |
| 602 |
< |
{register OBJREC *o = objptr(obj); |
| 603 |
< |
return(o->otype==MAT_ILLUM|o->otype==MAT_GLOW);} |
| 601 |
> |
static int |
| 602 |
> |
weaksrcmat(OBJECT obj) /* identify material */ |
| 603 |
> |
{ |
| 604 |
> |
OBJREC *m = findmaterial(objptr(obj)); |
| 605 |
> |
|
| 606 |
> |
if (m == NULL) return(0); |
| 607 |
> |
return((m->otype==MAT_ILLUM) | (m->otype==MAT_GLOW)); |
| 608 |
> |
} |
| 609 |
|
|
| 610 |
|
#define illumblock(m, r) (!(source[r->rsrc].sflags&SVIRTUAL) && \ |
| 611 |
|
r->rod > 0.0 && \ |
| 612 |
< |
weaksrcmod(source[r->rsrc].so->omod)) |
| 612 |
> |
weaksrcmat(source[r->rsrc].so->omod)) |
| 613 |
|
|
| 614 |
|
/* wrongsource * |
| 615 |
|
* |
| 665 |
|
distglow(m, r, raydist(r,PRIMARY))) |
| 666 |
|
|
| 667 |
|
|
| 668 |
< |
int |
| 669 |
< |
m_light(m, r) /* ray hit a light source */ |
| 670 |
< |
register OBJREC *m; |
| 671 |
< |
register RAY *r; |
| 668 |
> |
extern int |
| 669 |
> |
m_light( /* ray hit a light source */ |
| 670 |
> |
register OBJREC *m, |
| 671 |
> |
register RAY *r |
| 672 |
> |
) |
| 673 |
|
{ |
| 674 |
|
/* check for over-counting */ |
| 675 |
< |
if (badcomponent(m, r)) |
| 675 |
> |
if (badcomponent(m, r)) { |
| 676 |
> |
setcolor(r->rcoef, 0.0, 0.0, 0.0); |
| 677 |
|
return(1); |
| 678 |
< |
if (wrongsource(m, r)) |
| 678 |
> |
} |
| 679 |
> |
if (wrongsource(m, r)) { |
| 680 |
> |
setcolor(r->rcoef, 0.0, 0.0, 0.0); |
| 681 |
|
return(1); |
| 682 |
+ |
} |
| 683 |
|
/* check for passed illum */ |
| 684 |
|
if (passillum(m, r)) { |
| 685 |
|
if (m->oargs.nsargs && strcmp(m->oargs.sarg[0], VOIDID)) |
| 687 |
|
raytrans(r); |
| 688 |
|
return(1); |
| 689 |
|
} |
| 690 |
+ |
/* check for invisibility */ |
| 691 |
+ |
if (srcignore(m, r)) { |
| 692 |
+ |
setcolor(r->rcoef, 0.0, 0.0, 0.0); |
| 693 |
+ |
return(1); |
| 694 |
+ |
} |
| 695 |
|
/* otherwise treat as source */ |
| 696 |
|
/* check for behind */ |
| 697 |
|
if (r->rod < 0.0) |
| 570 |
– |
return(1); |
| 571 |
– |
/* check for invisibility */ |
| 572 |
– |
if (srcignore(m, r)) |
| 698 |
|
return(1); |
| 699 |
|
/* check for outside spot */ |
| 700 |
|
if (m->otype==MAT_SPOT && spotout(r, makespot(m))) |
