| 8 |
|
*/ |
| 9 |
|
|
| 10 |
|
#include "ray.h" |
| 11 |
– |
|
| 11 |
|
#include "otypes.h" |
| 12 |
< |
|
| 12 |
> |
#include "otspecial.h" |
| 13 |
> |
#include "rtotypes.h" |
| 14 |
|
#include "source.h" |
| 15 |
– |
|
| 15 |
|
#include "random.h" |
| 16 |
+ |
#include "pmapsrc.h" |
| 17 |
+ |
#include "pmapmat.h" |
| 18 |
|
|
| 18 |
– |
extern double ssampdist; /* scatter sampling distance */ |
| 19 |
– |
|
| 19 |
|
#ifndef MAXSSAMP |
| 20 |
|
#define MAXSSAMP 16 /* maximum samples per ray */ |
| 21 |
|
#endif |
| 40 |
|
static CNTPTR *cntord; /* source ordering in direct() */ |
| 41 |
|
static int maxcntr = 0; /* size of contribution arrays */ |
| 42 |
|
|
| 43 |
+ |
static int cntcmp(const void *p1, const void *p2); |
| 44 |
|
|
| 45 |
– |
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 */ |
| 51 |
– |
if (o->otype == MOD_ALIAS && o->oargs.nsargs) { |
| 52 |
– |
OBJECT aobj; |
| 53 |
– |
OBJREC *ao; |
| 54 |
– |
aobj = lastmod(objndx(o), o->oargs.sarg[0]); |
| 55 |
– |
if (aobj < 0) |
| 56 |
– |
objerror(o, USER, "bad reference"); |
| 57 |
– |
ao = objptr(aobj); |
| 58 |
– |
if (ismaterial(ao->otype)) |
| 59 |
– |
return(ao); |
| 60 |
– |
} |
| 61 |
– |
if (o->omod == OVOID) |
| 62 |
– |
return(NULL); |
| 63 |
– |
o = objptr(o->omod); |
| 64 |
– |
} |
| 65 |
– |
return(o); |
| 66 |
– |
} |
| 45 |
|
|
| 68 |
– |
|
| 46 |
|
void |
| 47 |
< |
marksources() /* find and mark source objects */ |
| 47 |
> |
marksources(void) /* find and mark source objects */ |
| 48 |
|
{ |
| 49 |
|
int foundsource = 0; |
| 50 |
|
int i; |
| 51 |
< |
register OBJREC *o, *m; |
| 52 |
< |
register int ns; |
| 51 |
> |
OBJREC *o, *m; |
| 52 |
> |
int ns; |
| 53 |
|
/* initialize dispatch table */ |
| 54 |
|
initstypes(); |
| 55 |
|
/* find direct sources */ |
| 60 |
|
if (!issurface(o->otype) || o->omod == OVOID) |
| 61 |
|
continue; |
| 62 |
|
/* find material */ |
| 63 |
< |
m = findmaterial(o); |
| 64 |
< |
if (m == NULL || !islight(m->otype)) |
| 63 |
> |
m = findmaterial(objptr(o->omod)); |
| 64 |
> |
if (m == NULL) |
| 65 |
> |
continue; |
| 66 |
> |
if (m->otype == MAT_CLIP) { |
| 67 |
> |
markclip(m); /* special case for antimatter */ |
| 68 |
> |
continue; |
| 69 |
> |
} |
| 70 |
> |
if (!islight(m->otype)) |
| 71 |
|
continue; /* not source modifier */ |
| 72 |
|
|
| 73 |
|
if (m->oargs.nfargs != (m->otype == MAT_GLOW ? 4 : |
| 74 |
|
m->otype == MAT_SPOT ? 7 : 3)) |
| 75 |
|
objerror(m, USER, "bad # arguments"); |
| 76 |
|
|
| 94 |
– |
if (m->otype == MAT_GLOW && |
| 95 |
– |
o->otype != OBJ_SOURCE && |
| 96 |
– |
m->oargs.farg[3] <= FTINY) |
| 97 |
– |
continue; /* don't bother */ |
| 77 |
|
if (m->oargs.farg[0] <= FTINY && m->oargs.farg[1] <= FTINY && |
| 78 |
|
m->oargs.farg[2] <= FTINY) |
| 79 |
|
continue; /* don't bother */ |
| 80 |
< |
|
| 80 |
> |
if (m->otype == MAT_GLOW && |
| 81 |
> |
o->otype != OBJ_SOURCE && |
| 82 |
> |
m->oargs.farg[3] <= FTINY) { |
| 83 |
> |
foundsource += (ambounce > 0); |
| 84 |
> |
continue; /* don't track these */ |
| 85 |
> |
} |
| 86 |
|
if (sfun[o->otype].of == NULL || |
| 87 |
|
sfun[o->otype].of->setsrc == NULL) |
| 88 |
|
objerror(o, USER, "illegal material"); |
| 95 |
|
if (m->otype == MAT_GLOW) { |
| 96 |
|
source[ns].sflags |= SPROX; |
| 97 |
|
source[ns].sl.prox = m->oargs.farg[3]; |
| 98 |
< |
if (source[ns].sflags & SDISTANT) |
| 98 |
> |
if (source[ns].sflags & SDISTANT) { |
| 99 |
|
source[ns].sflags |= SSKIP; |
| 100 |
+ |
foundsource += (ambounce > 0); |
| 101 |
+ |
} |
| 102 |
|
} else if (m->otype == MAT_SPOT) { |
| 103 |
|
source[ns].sflags |= SSPOT; |
| 104 |
|
if ((source[ns].sl.s = makespot(m)) == NULL) |
| 110 |
|
source[ns].sflags |= SSKIP; |
| 111 |
|
} |
| 112 |
|
} |
| 113 |
< |
#if SHADCACHE |
| 128 |
< |
source[ns].obscache = NULL; |
| 129 |
< |
#endif |
| 130 |
< |
if (!(source[ns].sflags & SSKIP)) |
| 131 |
< |
foundsource++; |
| 113 |
> |
foundsource += !(source[ns].sflags & SSKIP); |
| 114 |
|
} |
| 115 |
|
if (!foundsource) { |
| 116 |
|
error(WARNING, "no light sources found"); |
| 117 |
|
return; |
| 118 |
|
} |
| 119 |
< |
markvirtuals(); /* find and add virtual sources */ |
| 119 |
> |
#if SHADCACHE |
| 120 |
> |
for (ns = 0; ns < nsources; ns++) /* initialize obstructor cache */ |
| 121 |
> |
initobscache(ns); |
| 122 |
> |
#endif |
| 123 |
> |
/* PMAP: disable virtual sources */ |
| 124 |
> |
if (!photonMapping) |
| 125 |
> |
markvirtuals(); /* find and add virtual sources */ |
| 126 |
> |
|
| 127 |
|
/* allocate our contribution arrays */ |
| 128 |
|
maxcntr = nsources + MAXSPART; /* start with this many */ |
| 129 |
|
srccnt = (CONTRIB *)malloc(maxcntr*sizeof(CONTRIB)); |
| 137 |
|
|
| 138 |
|
|
| 139 |
|
void |
| 140 |
< |
freesources() /* free all source structures */ |
| 140 |
> |
freesources(void) /* free all source structures */ |
| 141 |
|
{ |
| 142 |
|
if (nsources > 0) { |
| 143 |
|
#if SHADCACHE |
| 148 |
|
source = NULL; |
| 149 |
|
nsources = 0; |
| 150 |
|
} |
| 151 |
+ |
markclip(NULL); |
| 152 |
|
if (maxcntr <= 0) |
| 153 |
|
return; |
| 154 |
|
free((void *)srccnt); |
| 161 |
|
|
| 162 |
|
int |
| 163 |
|
srcray( /* send a ray to a source, return domega */ |
| 164 |
< |
register RAY *sr, /* returned source ray */ |
| 165 |
< |
RAY *r, /* ray which hit object */ |
| 166 |
< |
SRCINDEX *si /* source sample index */ |
| 164 |
> |
RAY *sr, /* returned source ray */ |
| 165 |
> |
RAY *r, /* ray which hit object */ |
| 166 |
> |
SRCINDEX *si /* source sample index */ |
| 167 |
|
) |
| 168 |
|
{ |
| 169 |
< |
double d; /* distance to source */ |
| 170 |
< |
register SRCREC *srcp; |
| 169 |
> |
double d; /* distance to source */ |
| 170 |
> |
SRCREC *srcp; |
| 171 |
|
|
| 172 |
< |
rayorigin(sr, r, SHADOW, 1.0); /* ignore limits */ |
| 172 |
> |
rayorigin(sr, SHADOW, r, NULL); /* ignore limits */ |
| 173 |
|
|
| 174 |
< |
while ((d = nextssamp(sr, si)) != 0.0) { |
| 175 |
< |
sr->rsrc = si->sn; /* remember source */ |
| 176 |
< |
srcp = source + si->sn; |
| 177 |
< |
if (srcp->sflags & SDISTANT) { |
| 178 |
< |
if (srcp->sflags & SSPOT && spotout(sr, srcp->sl.s)) |
| 179 |
< |
continue; |
| 180 |
< |
return(1); /* sample OK */ |
| 181 |
< |
} |
| 174 |
> |
if (r == NULL) |
| 175 |
> |
sr->rmax = 0.0; |
| 176 |
> |
|
| 177 |
> |
while ((d = nextssamp(sr, si)) != 0.0) { |
| 178 |
> |
sr->rsrc = si->sn; /* remember source */ |
| 179 |
> |
srcp = source + si->sn; |
| 180 |
> |
if (srcp->sflags & SDISTANT) { |
| 181 |
> |
if (srcp->sflags & SSPOT && spotout(sr, srcp->sl.s)) |
| 182 |
> |
continue; |
| 183 |
> |
return(1); /* sample OK */ |
| 184 |
> |
} |
| 185 |
|
/* local source */ |
| 186 |
|
/* check proximity */ |
| 187 |
< |
if (srcp->sflags & SPROX && d > srcp->sl.prox) |
| 195 |
< |
continue; |
| 196 |
< |
/* check angle */ |
| 197 |
< |
if (srcp->sflags & SSPOT) { |
| 198 |
< |
if (spotout(sr, srcp->sl.s)) |
| 187 |
> |
if (srcp->sflags & SPROX && d > srcp->sl.prox) |
| 188 |
|
continue; |
| 189 |
+ |
/* check angle */ |
| 190 |
+ |
if (srcp->sflags & SSPOT) { |
| 191 |
+ |
if (spotout(sr, srcp->sl.s)) |
| 192 |
+ |
continue; |
| 193 |
|
/* adjust solid angle */ |
| 194 |
< |
si->dom *= d*d; |
| 195 |
< |
d += srcp->sl.s->flen; |
| 196 |
< |
si->dom /= d*d; |
| 194 |
> |
si->dom *= d*d; |
| 195 |
> |
d += srcp->sl.s->flen; |
| 196 |
> |
si->dom /= d*d; |
| 197 |
> |
} |
| 198 |
> |
return(1); /* sample OK */ |
| 199 |
|
} |
| 200 |
< |
return(1); /* sample OK */ |
| 206 |
< |
} |
| 207 |
< |
return(0); /* no more samples */ |
| 200 |
> |
return(0); /* no more samples */ |
| 201 |
|
} |
| 202 |
|
|
| 203 |
|
|
| 204 |
|
void |
| 205 |
|
srcvalue( /* punch ray to source and compute value */ |
| 206 |
< |
register RAY *r |
| 206 |
> |
RAY *r |
| 207 |
|
) |
| 208 |
|
{ |
| 209 |
< |
register SRCREC *sp; |
| 209 |
> |
SRCREC *sp; |
| 210 |
|
|
| 211 |
|
sp = &source[r->rsrc]; |
| 212 |
|
if (sp->sflags & SVIRTUAL) { /* virtual source */ |
| 243 |
|
} |
| 244 |
|
|
| 245 |
|
|
| 246 |
+ |
static int |
| 247 |
+ |
transillum( /* check if material is transparent illum */ |
| 248 |
+ |
OBJECT obj |
| 249 |
+ |
) |
| 250 |
+ |
{ |
| 251 |
+ |
OBJREC *m = findmaterial(objptr(obj)); |
| 252 |
+ |
|
| 253 |
+ |
if (m == NULL) |
| 254 |
+ |
return(1); |
| 255 |
+ |
if (m->otype != MAT_ILLUM) |
| 256 |
+ |
return(0); |
| 257 |
+ |
return(!m->oargs.nsargs || !strcmp(m->oargs.sarg[0], VOIDID)); |
| 258 |
+ |
} |
| 259 |
+ |
|
| 260 |
+ |
|
| 261 |
|
int |
| 262 |
|
sourcehit( /* check to see if ray hit distant source */ |
| 263 |
< |
register RAY *r |
| 263 |
> |
RAY *r |
| 264 |
|
) |
| 265 |
|
{ |
| 266 |
+ |
int glowsrc = -1; |
| 267 |
+ |
int transrc = -1; |
| 268 |
|
int first, last; |
| 269 |
< |
register int i; |
| 269 |
> |
int i; |
| 270 |
|
|
| 271 |
|
if (r->rsrc >= 0) { /* check only one if aimed */ |
| 272 |
|
first = last = r->rsrc; |
| 273 |
|
} else { /* otherwise check all */ |
| 274 |
|
first = 0; last = nsources-1; |
| 275 |
|
} |
| 276 |
< |
for (i = first; i <= last; i++) |
| 277 |
< |
if ((source[i].sflags & (SDISTANT|SVIRTUAL)) == SDISTANT) |
| 278 |
< |
/* |
| 279 |
< |
* Check to see if ray is within |
| 280 |
< |
* solid angle of source. |
| 281 |
< |
*/ |
| 282 |
< |
if (2.0*PI * (1.0 - DOT(source[i].sloc,r->rdir)) |
| 283 |
< |
<= source[i].ss2) { |
| 284 |
< |
r->ro = source[i].so; |
| 285 |
< |
if (!(source[i].sflags & SSKIP)) |
| 286 |
< |
break; |
| 287 |
< |
} |
| 288 |
< |
|
| 289 |
< |
if (r->ro != NULL) { |
| 290 |
< |
r->robj = objndx(r->ro); |
| 291 |
< |
for (i = 0; i < 3; i++) |
| 292 |
< |
r->ron[i] = -r->rdir[i]; |
| 293 |
< |
r->rod = 1.0; |
| 294 |
< |
r->pert[0] = r->pert[1] = r->pert[2] = 0.0; |
| 295 |
< |
r->uv[0] = r->uv[1] = 0.0; |
| 296 |
< |
r->rox = NULL; |
| 297 |
< |
return(1); |
| 276 |
> |
for (i = first; i <= last; i++) { |
| 277 |
> |
if ((source[i].sflags & (SDISTANT|SVIRTUAL)) != SDISTANT) |
| 278 |
> |
continue; |
| 279 |
> |
/* |
| 280 |
> |
* Check to see if ray is within |
| 281 |
> |
* solid angle of source. |
| 282 |
> |
*/ |
| 283 |
> |
if (2.*PI*(1. - DOT(source[i].sloc,r->rdir)) > source[i].ss2) |
| 284 |
> |
continue; |
| 285 |
> |
/* is it the only possibility? */ |
| 286 |
> |
if (first == last) { |
| 287 |
> |
r->ro = source[i].so; |
| 288 |
> |
break; |
| 289 |
> |
} |
| 290 |
> |
/* |
| 291 |
> |
* If it's a glow or transparent illum, just remember it. |
| 292 |
> |
*/ |
| 293 |
> |
if (source[i].sflags & SSKIP) { |
| 294 |
> |
if (glowsrc < 0) |
| 295 |
> |
glowsrc = i; |
| 296 |
> |
continue; |
| 297 |
> |
} |
| 298 |
> |
if (transillum(source[i].so->omod)) { |
| 299 |
> |
if (transrc < 0) |
| 300 |
> |
transrc = i; |
| 301 |
> |
continue; |
| 302 |
> |
} |
| 303 |
> |
r->ro = source[i].so; /* otherwise, use first hit */ |
| 304 |
> |
break; |
| 305 |
|
} |
| 306 |
< |
return(0); |
| 306 |
> |
/* |
| 307 |
> |
* Do we need fallback? |
| 308 |
> |
*/ |
| 309 |
> |
if (r->ro == NULL) { |
| 310 |
> |
if (transrc >= 0 && r->crtype & (AMBIENT|SPECULAR)) |
| 311 |
> |
return(0); /* avoid overcounting */ |
| 312 |
> |
if (glowsrc >= 0) |
| 313 |
> |
r->ro = source[glowsrc].so; |
| 314 |
> |
else |
| 315 |
> |
return(0); /* nothing usable */ |
| 316 |
> |
} |
| 317 |
> |
/* |
| 318 |
> |
* Make assignments. |
| 319 |
> |
*/ |
| 320 |
> |
r->robj = objndx(r->ro); |
| 321 |
> |
for (i = 0; i < 3; i++) |
| 322 |
> |
r->ron[i] = -r->rdir[i]; |
| 323 |
> |
r->rod = 1.0; |
| 324 |
> |
r->pert[0] = r->pert[1] = r->pert[2] = 0.0; |
| 325 |
> |
r->uv[0] = r->uv[1] = 0.0; |
| 326 |
> |
r->rox = NULL; |
| 327 |
> |
return(1); |
| 328 |
|
} |
| 329 |
|
|
| 330 |
|
|
| 331 |
|
static int |
| 332 |
|
cntcmp( /* contribution compare (descending) */ |
| 333 |
< |
const void *p1, |
| 334 |
< |
const void *p2 |
| 333 |
> |
const void *p1, |
| 334 |
> |
const void *p2 |
| 335 |
|
) |
| 336 |
|
{ |
| 337 |
< |
register const CNTPTR *sc1 = (const CNTPTR *)p1; |
| 338 |
< |
register const CNTPTR *sc2 = (const CNTPTR *)p2; |
| 337 |
> |
const CNTPTR *sc1 = (const CNTPTR *)p1; |
| 338 |
> |
const CNTPTR *sc2 = (const CNTPTR *)p2; |
| 339 |
|
|
| 340 |
|
if (sc1->brt > sc2->brt) |
| 341 |
|
return(-1); |
| 347 |
|
|
| 348 |
|
void |
| 349 |
|
direct( /* add direct component */ |
| 350 |
< |
RAY *r, /* ray that hit surface */ |
| 351 |
< |
void (*f)(), /* direct component coefficient function */ |
| 352 |
< |
char *p /* data for f */ |
| 350 |
> |
RAY *r, /* ray that hit surface */ |
| 351 |
> |
srcdirf_t *f, /* direct component coefficient function */ |
| 352 |
> |
void *p /* data for f */ |
| 353 |
|
) |
| 354 |
|
{ |
| 355 |
< |
extern void (*trace)(); |
| 356 |
< |
register int sn; |
| 319 |
< |
register CONTRIB *scp; |
| 355 |
> |
int sn; |
| 356 |
> |
CONTRIB *scp; |
| 357 |
|
SRCINDEX si; |
| 358 |
|
int nshadcheck, ncnts; |
| 359 |
|
int nhits; |
| 360 |
|
double prob, ourthresh, hwt; |
| 361 |
|
RAY sr; |
| 362 |
+ |
|
| 363 |
+ |
/* PMAP: Factor in direct photons (primarily for debugging/validation) */ |
| 364 |
+ |
if (directPhotonMapping) { |
| 365 |
+ |
(*f)(r -> rcol, p, r -> ron, PI); |
| 366 |
+ |
multDirectPmap(r); |
| 367 |
+ |
return; |
| 368 |
+ |
} |
| 369 |
+ |
|
| 370 |
|
/* NOTE: srccnt and cntord global so no recursion */ |
| 371 |
|
if (nsources <= 0) |
| 372 |
|
return; /* no sources?! */ |
| 387 |
|
scp->sno = sr.rsrc; |
| 388 |
|
/* compute coefficient */ |
| 389 |
|
(*f)(scp->coef, p, sr.rdir, si.dom); |
| 390 |
< |
cntord[sn].brt = bright(scp->coef); |
| 390 |
> |
cntord[sn].brt = intens(scp->coef); |
| 391 |
|
if (cntord[sn].brt <= 0.0) |
| 392 |
|
continue; |
| 393 |
|
#if SHADCACHE |
| 398 |
|
} |
| 399 |
|
#endif |
| 400 |
|
VCOPY(scp->dir, sr.rdir); |
| 401 |
+ |
copycolor(sr.rcoef, scp->coef); |
| 402 |
|
/* compute potential */ |
| 403 |
|
sr.revf = srcvalue; |
| 404 |
|
rayvalue(&sr); |
| 405 |
+ |
multcolor(sr.rcol, sr.rcoef); |
| 406 |
|
copycolor(scp->val, sr.rcol); |
| 407 |
< |
multcolor(scp->val, scp->coef); |
| 361 |
< |
cntord[sn].brt = bright(scp->val); |
| 407 |
> |
cntord[sn].brt = bright(sr.rcol); |
| 408 |
|
} |
| 409 |
|
/* sort contributions */ |
| 410 |
|
qsort(cntord, sn, sizeof(CNTPTR), cntcmp); |
| 411 |
|
{ /* find last */ |
| 412 |
< |
register int l, m; |
| 412 |
> |
int l, m; |
| 413 |
|
|
| 414 |
|
ncnts = l = sn; |
| 415 |
|
sn = 0; |
| 429 |
|
/* compute number to check */ |
| 430 |
|
nshadcheck = pow((double)ncnts, shadcert) + .5; |
| 431 |
|
/* modify threshold */ |
| 432 |
< |
ourthresh = shadthresh / r->rweight; |
| 432 |
> |
if (ncnts > MINSHADCNT) |
| 433 |
> |
ourthresh = shadthresh / r->rweight; |
| 434 |
> |
else |
| 435 |
> |
ourthresh = 0; |
| 436 |
|
/* test for shadows */ |
| 437 |
|
for (nhits = 0, hwt = 0.0, sn = 0; sn < ncnts; |
| 438 |
|
hwt += (double)source[scp->sno].nhits / |
| 445 |
|
break; |
| 446 |
|
scp = srccnt + cntord[sn].sndx; |
| 447 |
|
/* test for hit */ |
| 448 |
< |
rayorigin(&sr, r, SHADOW, 1.0); |
| 448 |
> |
rayorigin(&sr, SHADOW, r, NULL); |
| 449 |
> |
copycolor(sr.rcoef, scp->coef); |
| 450 |
|
VCOPY(sr.rdir, scp->dir); |
| 451 |
|
sr.rsrc = scp->sno; |
| 452 |
|
/* keep statistics */ |
| 459 |
|
source[scp->sno].sflags & SFOLLOW )) { |
| 460 |
|
/* follow entire path */ |
| 461 |
|
raycont(&sr); |
| 412 |
– |
rayparticipate(&sr); |
| 462 |
|
if (trace != NULL) |
| 463 |
|
(*trace)(&sr); /* trace execution */ |
| 464 |
|
if (bright(sr.rcol) <= FTINY) { |
| 470 |
|
#endif |
| 471 |
|
continue; /* missed! */ |
| 472 |
|
} |
| 473 |
+ |
rayparticipate(&sr); |
| 474 |
+ |
multcolor(sr.rcol, sr.rcoef); |
| 475 |
|
copycolor(scp->val, sr.rcol); |
| 476 |
< |
multcolor(scp->val, scp->coef); |
| 476 |
> |
} else if (trace != NULL && |
| 477 |
> |
(source[scp->sno].sflags & (SDISTANT|SVIRTUAL|SFOLLOW)) |
| 478 |
> |
== (SDISTANT|SFOLLOW) && |
| 479 |
> |
sourcehit(&sr) && rayshade(&sr, sr.ro->omod)) { |
| 480 |
> |
(*trace)(&sr); /* trace execution */ |
| 481 |
> |
/* skip call to rayparticipate() & scp->val update */ |
| 482 |
|
} |
| 483 |
|
/* add contribution if hit */ |
| 484 |
|
addcolor(r->rcol, scp->val); |
| 500 |
|
scp = srccnt + cntord[sn].sndx; |
| 501 |
|
prob = hwt * (double)source[scp->sno].nhits / |
| 502 |
|
(double)source[scp->sno].ntests; |
| 503 |
< |
if (prob > 1.0) |
| 504 |
< |
prob = 1.0; |
| 449 |
< |
scalecolor(scp->val, prob); |
| 503 |
> |
if (prob < 1.0) |
| 504 |
> |
scalecolor(scp->val, prob); |
| 505 |
|
addcolor(r->rcol, scp->val); |
| 506 |
|
} |
| 507 |
|
} |
| 509 |
|
|
| 510 |
|
void |
| 511 |
|
srcscatter( /* compute source scattering into ray */ |
| 512 |
< |
register RAY *r |
| 512 |
> |
RAY *r |
| 513 |
|
) |
| 514 |
|
{ |
| 515 |
|
int oldsampndx; |
| 521 |
|
COLOR cvext; |
| 522 |
|
int i, j; |
| 523 |
|
|
| 524 |
< |
if (r->slights == NULL || r->slights[0] == 0 |
| 525 |
< |
|| r->gecc >= 1.-FTINY || r->rot >= FHUGE) |
| 524 |
> |
if (r->rot >= FHUGE || r->gecc >= 1.-FTINY) |
| 525 |
> |
return; /* this can never work */ |
| 526 |
> |
/* PMAP: do unconditional inscattering for volume photons */ |
| 527 |
> |
if (!volumePhotonMapping && (r->slights == NULL || r->slights[0] == 0)) |
| 528 |
|
return; |
| 529 |
+ |
|
| 530 |
|
if (ssampdist <= FTINY || (nsamps = r->rot/ssampdist + .5) < 1) |
| 531 |
|
nsamps = 1; |
| 532 |
|
#if MAXSSAMP |
| 535 |
|
#endif |
| 536 |
|
oldsampndx = samplendx; |
| 537 |
|
samplendx = random()&0x7fff; /* randomize */ |
| 538 |
< |
for (i = r->slights[0]; i > 0; i--) { /* for each source */ |
| 538 |
> |
for (i = volumePhotonMapping ? 1 : r->slights[0]; i > 0; i--) { |
| 539 |
> |
/* for each source OR once if volume photon map enabled */ |
| 540 |
|
for (j = 0; j < nsamps; j++) { /* for each sample position */ |
| 541 |
|
samplendx++; |
| 542 |
|
t = r->rot * (j+frandom())/nsamps; |
| 552 |
|
sr.rorg[0] = r->rorg[0] + r->rdir[0]*t; |
| 553 |
|
sr.rorg[1] = r->rorg[1] + r->rdir[1]*t; |
| 554 |
|
sr.rorg[2] = r->rorg[2] + r->rdir[2]*t; |
| 555 |
< |
sr.rmax = 0.; |
| 556 |
< |
initsrcindex(&si); /* sample ray to this source */ |
| 557 |
< |
si.sn = r->slights[i]; |
| 558 |
< |
nopart(&si, &sr); |
| 559 |
< |
if (!srcray(&sr, NULL, &si) || |
| 560 |
< |
sr.rsrc != r->slights[i]) |
| 561 |
< |
continue; /* no path */ |
| 562 |
< |
copycolor(sr.cext, r->cext); |
| 563 |
< |
copycolor(sr.albedo, r->albedo); |
| 564 |
< |
sr.gecc = r->gecc; |
| 565 |
< |
sr.slights = r->slights; |
| 566 |
< |
rayvalue(&sr); /* eval. source ray */ |
| 567 |
< |
if (bright(sr.rcol) <= FTINY) |
| 568 |
< |
continue; |
| 569 |
< |
if (r->gecc <= FTINY) /* compute P(theta) */ |
| 570 |
< |
d = 1.; |
| 571 |
< |
else { |
| 572 |
< |
d = DOT(r->rdir, sr.rdir); |
| 573 |
< |
d = 1. + r->gecc*r->gecc - 2.*r->gecc*d; |
| 574 |
< |
d = (1. - r->gecc*r->gecc) / (d*sqrt(d)); |
| 575 |
< |
} |
| 555 |
> |
|
| 556 |
> |
if (!volumePhotonMapping) { |
| 557 |
> |
initsrcindex(&si); /* sample ray to this source */ |
| 558 |
> |
si.sn = r->slights[i]; |
| 559 |
> |
nopart(&si, &sr); |
| 560 |
> |
if (!srcray(&sr, NULL, &si) || |
| 561 |
> |
sr.rsrc != r->slights[i]) |
| 562 |
> |
continue; /* no path */ |
| 563 |
> |
#if SHADCACHE |
| 564 |
> |
if (srcblocked(&sr)) /* check shadow cache */ |
| 565 |
> |
continue; |
| 566 |
> |
#endif |
| 567 |
> |
copycolor(sr.cext, r->cext); |
| 568 |
> |
copycolor(sr.albedo, r->albedo); |
| 569 |
> |
sr.gecc = r->gecc; |
| 570 |
> |
sr.slights = r->slights; |
| 571 |
> |
rayvalue(&sr); /* eval. source ray */ |
| 572 |
> |
if (bright(sr.rcol) <= FTINY) { |
| 573 |
> |
#if SHADCACHE |
| 574 |
> |
srcblocker(&sr); /* add blocker to cache */ |
| 575 |
> |
#endif |
| 576 |
> |
continue; |
| 577 |
> |
} |
| 578 |
> |
if (r->gecc <= FTINY) /* compute P(theta) */ |
| 579 |
> |
d = 1.; |
| 580 |
> |
else { |
| 581 |
> |
d = DOT(r->rdir, sr.rdir); |
| 582 |
> |
d = 1. + r->gecc*r->gecc - 2.*r->gecc*d; |
| 583 |
> |
d = (1. - r->gecc*r->gecc) / (d*sqrt(d)); |
| 584 |
> |
} |
| 585 |
|
/* other factors */ |
| 586 |
< |
d *= si.dom * r->rot / (4.*PI*nsamps); |
| 586 |
> |
d *= si.dom * r->rot / (4.*PI*nsamps); |
| 587 |
> |
scalecolor(sr.rcol, d); |
| 588 |
> |
} else { |
| 589 |
> |
/* PMAP: Add ambient inscattering from |
| 590 |
> |
* volume photons; note we reverse the |
| 591 |
> |
* incident ray direction since we're |
| 592 |
> |
* now in *backward* raytracing mode! */ |
| 593 |
> |
sr.rdir [0] = -r -> rdir [0]; |
| 594 |
> |
sr.rdir [1] = -r -> rdir [1]; |
| 595 |
> |
sr.rdir [2] = -r -> rdir [2]; |
| 596 |
> |
sr.gecc = r -> gecc; |
| 597 |
> |
inscatterVolumePmap(&sr, sr.rcol); |
| 598 |
> |
scalecolor(sr.rcol, r -> rot / nsamps); |
| 599 |
> |
} |
| 600 |
|
multcolor(sr.rcol, r->cext); |
| 601 |
|
multcolor(sr.rcol, r->albedo); |
| 521 |
– |
scalecolor(sr.rcol, d); |
| 602 |
|
multcolor(sr.rcol, cvext); |
| 603 |
|
addcolor(r->rcol, sr.rcol); /* add it in */ |
| 604 |
|
} |
| 626 |
|
static int |
| 627 |
|
weaksrcmat(OBJECT obj) /* identify material */ |
| 628 |
|
{ |
| 629 |
< |
OBJREC *o = findmaterial(objptr(obj)); |
| 629 |
> |
OBJREC *m = findmaterial(objptr(obj)); |
| 630 |
|
|
| 631 |
< |
if (o == NULL) return 0; |
| 632 |
< |
return((o->otype==MAT_ILLUM)|(o->otype==MAT_GLOW)); |
| 631 |
> |
if (m == NULL) return(0); |
| 632 |
> |
return((m->otype==MAT_ILLUM) | (m->otype==MAT_GLOW)); |
| 633 |
|
} |
| 634 |
|
|
| 635 |
|
#define illumblock(m, r) (!(source[r->rsrc].sflags&SVIRTUAL) && \ |
| 665 |
|
* The same is true for stray specular samples, since the specular |
| 666 |
|
* contribution from light sources is calculated separately. |
| 667 |
|
*/ |
| 668 |
< |
|
| 669 |
< |
#define badcomponent(m, r) (r->crtype&(AMBIENT|SPECULAR) && \ |
| 668 |
> |
/* PMAP: Also avoid counting sources via transferred ambient rays (e.g. |
| 669 |
> |
* through glass) when photon mapping is enabled, as these indirect |
| 670 |
> |
* components are already accounted for. |
| 671 |
> |
*/ |
| 672 |
> |
#define badcomponent(m, r) (srcRayInPmap(r) || \ |
| 673 |
> |
(r->crtype&(AMBIENT|SPECULAR) && \ |
| 674 |
|
!(r->crtype&SHADOW || r->rod < 0.0 || \ |
| 675 |
< |
/* not 100% correct */ distglow(m, r, r->rot))) |
| 675 |
> |
/* not 100% correct */ distglow(m, r, r->rot)))) |
| 676 |
|
|
| 677 |
|
/* passillum * |
| 678 |
|
* |
| 696 |
|
|
| 697 |
|
int |
| 698 |
|
m_light( /* ray hit a light source */ |
| 699 |
< |
register OBJREC *m, |
| 700 |
< |
register RAY *r |
| 699 |
> |
OBJREC *m, |
| 700 |
> |
RAY *r |
| 701 |
|
) |
| 702 |
|
{ |
| 703 |
|
/* check for over-counting */ |
| 704 |
< |
if (badcomponent(m, r)) |
| 704 |
> |
if (badcomponent(m, r)) { |
| 705 |
> |
setcolor(r->rcoef, 0.0, 0.0, 0.0); |
| 706 |
|
return(1); |
| 707 |
< |
if (wrongsource(m, r)) |
| 707 |
> |
} |
| 708 |
> |
if (wrongsource(m, r)) { |
| 709 |
> |
setcolor(r->rcoef, 0.0, 0.0, 0.0); |
| 710 |
|
return(1); |
| 711 |
+ |
} |
| 712 |
|
/* check for passed illum */ |
| 713 |
|
if (passillum(m, r)) { |
| 714 |
|
if (m->oargs.nsargs && strcmp(m->oargs.sarg[0], VOIDID)) |
| 716 |
|
raytrans(r); |
| 717 |
|
return(1); |
| 718 |
|
} |
| 719 |
+ |
/* check for invisibility */ |
| 720 |
+ |
if (srcignore(m, r)) { |
| 721 |
+ |
setcolor(r->rcoef, 0.0, 0.0, 0.0); |
| 722 |
+ |
return(1); |
| 723 |
+ |
} |
| 724 |
|
/* otherwise treat as source */ |
| 725 |
|
/* check for behind */ |
| 726 |
|
if (r->rod < 0.0) |
| 634 |
– |
return(1); |
| 635 |
– |
/* check for invisibility */ |
| 636 |
– |
if (srcignore(m, r)) |
| 727 |
|
return(1); |
| 728 |
|
/* check for outside spot */ |
| 729 |
|
if (m->otype==MAT_SPOT && spotout(r, makespot(m))) |
