| 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 |
+ |
#include "pmapsrc.h" |
| 16 |
+ |
#include "pmapmat.h" |
| 17 |
|
|
| 22 |
– |
extern double ssampdist; /* scatter sampling distance */ |
| 23 |
– |
|
| 18 |
|
#ifndef MAXSSAMP |
| 19 |
|
#define MAXSSAMP 16 /* maximum samples per ray */ |
| 20 |
|
#endif |
| 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 |
+ |
|
| 45 |
|
OBJREC * /* find an object's actual material */ |
| 46 |
< |
findmaterial(register OBJREC *o) |
| 46 |
> |
findmaterial(OBJREC *o) |
| 47 |
|
{ |
| 48 |
|
while (!ismaterial(o->otype)) { |
| 53 |
– |
if (ismixture(o->otype)) |
| 54 |
– |
return(NULL); /* reject mixed materials */ |
| 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)) |
| 55 |
> |
/* recursive check on alias branch */ |
| 56 |
> |
if ((ao = findmaterial(objptr(aobj))) != NULL) |
| 57 |
|
return(ao); |
| 58 |
|
} |
| 59 |
|
if (o->omod == OVOID) |
| 60 |
|
return(NULL); |
| 61 |
|
o = objptr(o->omod); |
| 62 |
|
} |
| 63 |
< |
return(o); |
| 63 |
> |
return(o); /* mixtures will return NULL */ |
| 64 |
|
} |
| 65 |
|
|
| 66 |
|
|
| 67 |
|
void |
| 68 |
< |
marksources() /* find and mark source objects */ |
| 68 |
> |
marksources(void) /* find and mark source objects */ |
| 69 |
|
{ |
| 70 |
|
int foundsource = 0; |
| 71 |
|
int i; |
| 72 |
< |
register OBJREC *o, *m; |
| 73 |
< |
register int ns; |
| 72 |
> |
OBJREC *o, *m; |
| 73 |
> |
int ns; |
| 74 |
|
/* initialize dispatch table */ |
| 75 |
|
initstypes(); |
| 76 |
|
/* find direct sources */ |
| 81 |
|
if (!issurface(o->otype) || o->omod == OVOID) |
| 82 |
|
continue; |
| 83 |
|
/* find material */ |
| 84 |
< |
m = findmaterial(o); |
| 85 |
< |
if (m == NULL || !islight(m->otype)) |
| 84 |
> |
m = findmaterial(objptr(o->omod)); |
| 85 |
> |
if (m == NULL) |
| 86 |
> |
continue; |
| 87 |
> |
if (m->otype == MAT_CLIP) { |
| 88 |
> |
markclip(m); /* special case for antimatter */ |
| 89 |
> |
continue; |
| 90 |
> |
} |
| 91 |
> |
if (!islight(m->otype)) |
| 92 |
|
continue; /* not source modifier */ |
| 93 |
|
|
| 94 |
|
if (m->oargs.nfargs != (m->otype == MAT_GLOW ? 4 : |
| 95 |
|
m->otype == MAT_SPOT ? 7 : 3)) |
| 96 |
|
objerror(m, USER, "bad # arguments"); |
| 97 |
|
|
| 98 |
– |
if (m->otype == MAT_GLOW && |
| 99 |
– |
o->otype != OBJ_SOURCE && |
| 100 |
– |
m->oargs.farg[3] <= FTINY) |
| 101 |
– |
continue; /* don't bother */ |
| 98 |
|
if (m->oargs.farg[0] <= FTINY && m->oargs.farg[1] <= FTINY && |
| 99 |
|
m->oargs.farg[2] <= FTINY) |
| 100 |
|
continue; /* don't bother */ |
| 101 |
< |
|
| 101 |
> |
if (m->otype == MAT_GLOW && |
| 102 |
> |
o->otype != OBJ_SOURCE && |
| 103 |
> |
m->oargs.farg[3] <= FTINY) { |
| 104 |
> |
foundsource += (ambounce > 0); |
| 105 |
> |
continue; /* don't track these */ |
| 106 |
> |
} |
| 107 |
|
if (sfun[o->otype].of == NULL || |
| 108 |
|
sfun[o->otype].of->setsrc == NULL) |
| 109 |
|
objerror(o, USER, "illegal material"); |
| 116 |
|
if (m->otype == MAT_GLOW) { |
| 117 |
|
source[ns].sflags |= SPROX; |
| 118 |
|
source[ns].sl.prox = m->oargs.farg[3]; |
| 119 |
< |
if (source[ns].sflags & SDISTANT) |
| 119 |
> |
if (source[ns].sflags & SDISTANT) { |
| 120 |
|
source[ns].sflags |= SSKIP; |
| 121 |
+ |
foundsource += (ambounce > 0); |
| 122 |
+ |
} |
| 123 |
|
} else if (m->otype == MAT_SPOT) { |
| 124 |
|
source[ns].sflags |= SSPOT; |
| 125 |
|
if ((source[ns].sl.s = makespot(m)) == NULL) |
| 131 |
|
source[ns].sflags |= SSKIP; |
| 132 |
|
} |
| 133 |
|
} |
| 134 |
< |
#if SHADCACHE |
| 132 |
< |
source[ns].obscache = NULL; |
| 133 |
< |
#endif |
| 134 |
< |
if (!(source[ns].sflags & SSKIP)) |
| 135 |
< |
foundsource++; |
| 134 |
> |
foundsource += !(source[ns].sflags & SSKIP); |
| 135 |
|
} |
| 136 |
|
if (!foundsource) { |
| 137 |
|
error(WARNING, "no light sources found"); |
| 138 |
|
return; |
| 139 |
|
} |
| 140 |
< |
markvirtuals(); /* find and add virtual sources */ |
| 140 |
> |
#if SHADCACHE |
| 141 |
> |
for (ns = 0; ns < nsources; ns++) /* initialize obstructor cache */ |
| 142 |
> |
initobscache(ns); |
| 143 |
> |
#endif |
| 144 |
> |
/* PMAP: disable virtual sources */ |
| 145 |
> |
if (!photonMapping) |
| 146 |
> |
markvirtuals(); /* find and add virtual sources */ |
| 147 |
> |
|
| 148 |
|
/* allocate our contribution arrays */ |
| 149 |
|
maxcntr = nsources + MAXSPART; /* start with this many */ |
| 150 |
|
srccnt = (CONTRIB *)malloc(maxcntr*sizeof(CONTRIB)); |
| 158 |
|
|
| 159 |
|
|
| 160 |
|
void |
| 161 |
< |
freesources() /* free all source structures */ |
| 161 |
> |
freesources(void) /* free all source structures */ |
| 162 |
|
{ |
| 163 |
|
if (nsources > 0) { |
| 164 |
|
#if SHADCACHE |
| 169 |
|
source = NULL; |
| 170 |
|
nsources = 0; |
| 171 |
|
} |
| 172 |
+ |
markclip(NULL); |
| 173 |
|
if (maxcntr <= 0) |
| 174 |
|
return; |
| 175 |
|
free((void *)srccnt); |
| 182 |
|
|
| 183 |
|
int |
| 184 |
|
srcray( /* send a ray to a source, return domega */ |
| 185 |
< |
register RAY *sr, /* returned source ray */ |
| 186 |
< |
RAY *r, /* ray which hit object */ |
| 187 |
< |
SRCINDEX *si /* source sample index */ |
| 185 |
> |
RAY *sr, /* returned source ray */ |
| 186 |
> |
RAY *r, /* ray which hit object */ |
| 187 |
> |
SRCINDEX *si /* source sample index */ |
| 188 |
|
) |
| 189 |
|
{ |
| 190 |
< |
double d; /* distance to source */ |
| 191 |
< |
register SRCREC *srcp; |
| 190 |
> |
double d; /* distance to source */ |
| 191 |
> |
SRCREC *srcp; |
| 192 |
|
|
| 193 |
< |
rayorigin(sr, r, SHADOW, 1.0); /* ignore limits */ |
| 193 |
> |
rayorigin(sr, SHADOW, r, NULL); /* ignore limits */ |
| 194 |
|
|
| 195 |
< |
while ((d = nextssamp(sr, si)) != 0.0) { |
| 196 |
< |
sr->rsrc = si->sn; /* remember source */ |
| 197 |
< |
srcp = source + si->sn; |
| 198 |
< |
if (srcp->sflags & SDISTANT) { |
| 199 |
< |
if (srcp->sflags & SSPOT && spotout(sr, srcp->sl.s)) |
| 200 |
< |
continue; |
| 201 |
< |
return(1); /* sample OK */ |
| 202 |
< |
} |
| 195 |
> |
if (r == NULL) |
| 196 |
> |
sr->rmax = 0.0; |
| 197 |
> |
|
| 198 |
> |
while ((d = nextssamp(sr, si)) != 0.0) { |
| 199 |
> |
sr->rsrc = si->sn; /* remember source */ |
| 200 |
> |
srcp = source + si->sn; |
| 201 |
> |
if (srcp->sflags & SDISTANT) { |
| 202 |
> |
if (srcp->sflags & SSPOT && spotout(sr, srcp->sl.s)) |
| 203 |
> |
continue; |
| 204 |
> |
return(1); /* sample OK */ |
| 205 |
> |
} |
| 206 |
|
/* local source */ |
| 207 |
|
/* check proximity */ |
| 208 |
< |
if (srcp->sflags & SPROX && d > srcp->sl.prox) |
| 199 |
< |
continue; |
| 200 |
< |
/* check angle */ |
| 201 |
< |
if (srcp->sflags & SSPOT) { |
| 202 |
< |
if (spotout(sr, srcp->sl.s)) |
| 208 |
> |
if (srcp->sflags & SPROX && d > srcp->sl.prox) |
| 209 |
|
continue; |
| 210 |
+ |
/* check angle */ |
| 211 |
+ |
if (srcp->sflags & SSPOT) { |
| 212 |
+ |
if (spotout(sr, srcp->sl.s)) |
| 213 |
+ |
continue; |
| 214 |
|
/* adjust solid angle */ |
| 215 |
< |
si->dom *= d*d; |
| 216 |
< |
d += srcp->sl.s->flen; |
| 217 |
< |
si->dom /= d*d; |
| 215 |
> |
si->dom *= d*d; |
| 216 |
> |
d += srcp->sl.s->flen; |
| 217 |
> |
si->dom /= d*d; |
| 218 |
> |
} |
| 219 |
> |
return(1); /* sample OK */ |
| 220 |
|
} |
| 221 |
< |
return(1); /* sample OK */ |
| 210 |
< |
} |
| 211 |
< |
return(0); /* no more samples */ |
| 221 |
> |
return(0); /* no more samples */ |
| 222 |
|
} |
| 223 |
|
|
| 224 |
|
|
| 225 |
|
void |
| 226 |
|
srcvalue( /* punch ray to source and compute value */ |
| 227 |
< |
register RAY *r |
| 227 |
> |
RAY *r |
| 228 |
|
) |
| 229 |
|
{ |
| 230 |
< |
register SRCREC *sp; |
| 230 |
> |
SRCREC *sp; |
| 231 |
|
|
| 232 |
|
sp = &source[r->rsrc]; |
| 233 |
|
if (sp->sflags & SVIRTUAL) { /* virtual source */ |
| 264 |
|
} |
| 265 |
|
|
| 266 |
|
|
| 267 |
+ |
static int |
| 268 |
+ |
transillum( /* check if material is transparent illum */ |
| 269 |
+ |
OBJECT obj |
| 270 |
+ |
) |
| 271 |
+ |
{ |
| 272 |
+ |
OBJREC *m = findmaterial(objptr(obj)); |
| 273 |
+ |
|
| 274 |
+ |
if (m == NULL) |
| 275 |
+ |
return(1); |
| 276 |
+ |
if (m->otype != MAT_ILLUM) |
| 277 |
+ |
return(0); |
| 278 |
+ |
return(!m->oargs.nsargs || !strcmp(m->oargs.sarg[0], VOIDID)); |
| 279 |
+ |
} |
| 280 |
+ |
|
| 281 |
+ |
|
| 282 |
|
int |
| 283 |
|
sourcehit( /* check to see if ray hit distant source */ |
| 284 |
< |
register RAY *r |
| 284 |
> |
RAY *r |
| 285 |
|
) |
| 286 |
|
{ |
| 287 |
+ |
int glowsrc = -1; |
| 288 |
+ |
int transrc = -1; |
| 289 |
|
int first, last; |
| 290 |
< |
register int i; |
| 290 |
> |
int i; |
| 291 |
|
|
| 292 |
|
if (r->rsrc >= 0) { /* check only one if aimed */ |
| 293 |
|
first = last = r->rsrc; |
| 294 |
|
} else { /* otherwise check all */ |
| 295 |
|
first = 0; last = nsources-1; |
| 296 |
|
} |
| 297 |
< |
for (i = first; i <= last; i++) |
| 298 |
< |
if ((source[i].sflags & (SDISTANT|SVIRTUAL)) == SDISTANT) |
| 299 |
< |
/* |
| 300 |
< |
* Check to see if ray is within |
| 301 |
< |
* solid angle of source. |
| 302 |
< |
*/ |
| 303 |
< |
if (2.0*PI * (1.0 - DOT(source[i].sloc,r->rdir)) |
| 304 |
< |
<= source[i].ss2) { |
| 305 |
< |
r->ro = source[i].so; |
| 306 |
< |
if (!(source[i].sflags & SSKIP)) |
| 307 |
< |
break; |
| 308 |
< |
} |
| 309 |
< |
|
| 310 |
< |
if (r->ro != NULL) { |
| 311 |
< |
r->robj = objndx(r->ro); |
| 312 |
< |
for (i = 0; i < 3; i++) |
| 313 |
< |
r->ron[i] = -r->rdir[i]; |
| 314 |
< |
r->rod = 1.0; |
| 315 |
< |
r->pert[0] = r->pert[1] = r->pert[2] = 0.0; |
| 316 |
< |
r->uv[0] = r->uv[1] = 0.0; |
| 317 |
< |
r->rox = NULL; |
| 318 |
< |
return(1); |
| 297 |
> |
for (i = first; i <= last; i++) { |
| 298 |
> |
if ((source[i].sflags & (SDISTANT|SVIRTUAL)) != SDISTANT) |
| 299 |
> |
continue; |
| 300 |
> |
/* |
| 301 |
> |
* Check to see if ray is within |
| 302 |
> |
* solid angle of source. |
| 303 |
> |
*/ |
| 304 |
> |
if (2.*PI*(1. - DOT(source[i].sloc,r->rdir)) > source[i].ss2) |
| 305 |
> |
continue; |
| 306 |
> |
/* is it the only possibility? */ |
| 307 |
> |
if (first == last) { |
| 308 |
> |
r->ro = source[i].so; |
| 309 |
> |
break; |
| 310 |
> |
} |
| 311 |
> |
/* |
| 312 |
> |
* If it's a glow or transparent illum, just remember it. |
| 313 |
> |
*/ |
| 314 |
> |
if (source[i].sflags & SSKIP) { |
| 315 |
> |
if (glowsrc < 0) |
| 316 |
> |
glowsrc = i; |
| 317 |
> |
continue; |
| 318 |
> |
} |
| 319 |
> |
if (transillum(source[i].so->omod)) { |
| 320 |
> |
if (transrc < 0) |
| 321 |
> |
transrc = i; |
| 322 |
> |
continue; |
| 323 |
> |
} |
| 324 |
> |
r->ro = source[i].so; /* otherwise, use first hit */ |
| 325 |
> |
break; |
| 326 |
|
} |
| 327 |
< |
return(0); |
| 328 |
< |
} |
| 329 |
< |
|
| 330 |
< |
|
| 331 |
< |
#if SHADCACHE /* preemptive shadow checking */ |
| 332 |
< |
#define ABS(x) ((x)>0 ? (x) : -(x)) |
| 333 |
< |
|
| 334 |
< |
static void /* find closest blockers to source */ |
| 335 |
< |
initobscache(SRCREC *srcp) |
| 336 |
< |
{ |
| 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); |
| 327 |
> |
/* |
| 328 |
> |
* Do we need fallback? |
| 329 |
> |
*/ |
| 330 |
> |
if (r->ro == NULL) { |
| 331 |
> |
if (transrc >= 0 && r->crtype & (AMBIENT|SPECULAR)) |
| 332 |
> |
return(0); /* avoid overcounting */ |
| 333 |
> |
if (glowsrc >= 0) |
| 334 |
> |
r->ro = source[glowsrc].so; |
| 335 |
> |
else |
| 336 |
> |
return(0); /* nothing usable */ |
| 337 |
|
} |
| 338 |
< |
/* XXX Should cast rays from source */ |
| 339 |
< |
for (i = cachelen; i--; ) |
| 340 |
< |
srcp->obscache->obs[i] = OVOID; |
| 338 |
> |
/* |
| 339 |
> |
* Make assignments. |
| 340 |
> |
*/ |
| 341 |
> |
r->robj = objndx(r->ro); |
| 342 |
> |
for (i = 0; i < 3; i++) |
| 343 |
> |
r->ron[i] = -r->rdir[i]; |
| 344 |
> |
r->rod = 1.0; |
| 345 |
> |
r->pert[0] = r->pert[1] = r->pert[2] = 0.0; |
| 346 |
> |
r->uv[0] = r->uv[1] = 0.0; |
| 347 |
> |
r->rox = NULL; |
| 348 |
> |
return(1); |
| 349 |
|
} |
| 350 |
|
|
| 351 |
|
|
| 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 |
– |
|
| 352 |
|
static int |
| 353 |
|
cntcmp( /* contribution compare (descending) */ |
| 354 |
< |
const void *p1, |
| 355 |
< |
const void *p2 |
| 354 |
> |
const void *p1, |
| 355 |
> |
const void *p2 |
| 356 |
|
) |
| 357 |
|
{ |
| 358 |
< |
register const CNTPTR *sc1 = (const CNTPTR *)p1; |
| 359 |
< |
register const CNTPTR *sc2 = (const CNTPTR *)p2; |
| 358 |
> |
const CNTPTR *sc1 = (const CNTPTR *)p1; |
| 359 |
> |
const CNTPTR *sc2 = (const CNTPTR *)p2; |
| 360 |
|
|
| 361 |
|
if (sc1->brt > sc2->brt) |
| 362 |
|
return(-1); |
| 368 |
|
|
| 369 |
|
void |
| 370 |
|
direct( /* add direct component */ |
| 371 |
< |
RAY *r, /* ray that hit surface */ |
| 372 |
< |
void (*f)(), /* direct component coefficient function */ |
| 373 |
< |
char *p /* data for f */ |
| 371 |
> |
RAY *r, /* ray that hit surface */ |
| 372 |
> |
srcdirf_t *f, /* direct component coefficient function */ |
| 373 |
> |
void *p /* data for f */ |
| 374 |
|
) |
| 375 |
|
{ |
| 376 |
< |
extern void (*trace)(); |
| 377 |
< |
register int sn; |
| 512 |
< |
register CONTRIB *scp; |
| 376 |
> |
int sn; |
| 377 |
> |
CONTRIB *scp; |
| 378 |
|
SRCINDEX si; |
| 379 |
|
int nshadcheck, ncnts; |
| 380 |
|
int nhits; |
| 381 |
|
double prob, ourthresh, hwt; |
| 382 |
|
RAY sr; |
| 383 |
+ |
|
| 384 |
+ |
/* PMAP: Factor in direct photons (primarily for debugging/validation) */ |
| 385 |
+ |
if (directPhotonMapping) { |
| 386 |
+ |
(*f)(r -> rcol, p, r -> ron, PI); |
| 387 |
+ |
multDirectPmap(r); |
| 388 |
+ |
return; |
| 389 |
+ |
} |
| 390 |
+ |
|
| 391 |
|
/* NOTE: srccnt and cntord global so no recursion */ |
| 392 |
|
if (nsources <= 0) |
| 393 |
|
return; /* no sources?! */ |
| 408 |
|
scp->sno = sr.rsrc; |
| 409 |
|
/* compute coefficient */ |
| 410 |
|
(*f)(scp->coef, p, sr.rdir, si.dom); |
| 411 |
< |
cntord[sn].brt = bright(scp->coef); |
| 411 |
> |
cntord[sn].brt = intens(scp->coef); |
| 412 |
|
if (cntord[sn].brt <= 0.0) |
| 413 |
|
continue; |
| 414 |
|
#if SHADCACHE |
| 419 |
|
} |
| 420 |
|
#endif |
| 421 |
|
VCOPY(scp->dir, sr.rdir); |
| 422 |
+ |
copycolor(sr.rcoef, scp->coef); |
| 423 |
|
/* compute potential */ |
| 424 |
|
sr.revf = srcvalue; |
| 425 |
|
rayvalue(&sr); |
| 426 |
+ |
multcolor(sr.rcol, sr.rcoef); |
| 427 |
|
copycolor(scp->val, sr.rcol); |
| 428 |
< |
multcolor(scp->val, scp->coef); |
| 554 |
< |
cntord[sn].brt = bright(scp->val); |
| 428 |
> |
cntord[sn].brt = bright(sr.rcol); |
| 429 |
|
} |
| 430 |
|
/* sort contributions */ |
| 431 |
|
qsort(cntord, sn, sizeof(CNTPTR), cntcmp); |
| 432 |
|
{ /* find last */ |
| 433 |
< |
register int l, m; |
| 433 |
> |
int l, m; |
| 434 |
|
|
| 435 |
|
ncnts = l = sn; |
| 436 |
|
sn = 0; |
| 450 |
|
/* compute number to check */ |
| 451 |
|
nshadcheck = pow((double)ncnts, shadcert) + .5; |
| 452 |
|
/* modify threshold */ |
| 453 |
< |
ourthresh = shadthresh / r->rweight; |
| 453 |
> |
if (ncnts > MINSHADCNT) |
| 454 |
> |
ourthresh = shadthresh / r->rweight; |
| 455 |
> |
else |
| 456 |
> |
ourthresh = 0; |
| 457 |
|
/* test for shadows */ |
| 458 |
|
for (nhits = 0, hwt = 0.0, sn = 0; sn < ncnts; |
| 459 |
|
hwt += (double)source[scp->sno].nhits / |
| 466 |
|
break; |
| 467 |
|
scp = srccnt + cntord[sn].sndx; |
| 468 |
|
/* test for hit */ |
| 469 |
< |
rayorigin(&sr, r, SHADOW, 1.0); |
| 469 |
> |
rayorigin(&sr, SHADOW, r, NULL); |
| 470 |
> |
copycolor(sr.rcoef, scp->coef); |
| 471 |
|
VCOPY(sr.rdir, scp->dir); |
| 472 |
|
sr.rsrc = scp->sno; |
| 473 |
|
/* keep statistics */ |
| 480 |
|
source[scp->sno].sflags & SFOLLOW )) { |
| 481 |
|
/* follow entire path */ |
| 482 |
|
raycont(&sr); |
| 605 |
– |
rayparticipate(&sr); |
| 483 |
|
if (trace != NULL) |
| 484 |
|
(*trace)(&sr); /* trace execution */ |
| 485 |
|
if (bright(sr.rcol) <= FTINY) { |
| 486 |
|
#if SHADCACHE |
| 487 |
|
if ((scp <= srccnt || scp[-1].sno != scp->sno) |
| 488 |
< |
&& (scp >= srccnt+ncnts || |
| 488 |
> |
&& (scp >= srccnt+ncnts-1 || |
| 489 |
|
scp[1].sno != scp->sno)) |
| 490 |
|
srcblocker(&sr); |
| 491 |
|
#endif |
| 492 |
|
continue; /* missed! */ |
| 493 |
|
} |
| 494 |
+ |
rayparticipate(&sr); |
| 495 |
+ |
multcolor(sr.rcol, sr.rcoef); |
| 496 |
|
copycolor(scp->val, sr.rcol); |
| 497 |
< |
multcolor(scp->val, scp->coef); |
| 497 |
> |
} else if (trace != NULL && |
| 498 |
> |
(source[scp->sno].sflags & (SDISTANT|SVIRTUAL|SFOLLOW)) |
| 499 |
> |
== (SDISTANT|SFOLLOW) && |
| 500 |
> |
sourcehit(&sr) && rayshade(&sr, sr.ro->omod)) { |
| 501 |
> |
(*trace)(&sr); /* trace execution */ |
| 502 |
> |
/* skip call to rayparticipate() & scp->val update */ |
| 503 |
|
} |
| 504 |
|
/* add contribution if hit */ |
| 505 |
|
addcolor(r->rcol, scp->val); |
| 521 |
|
scp = srccnt + cntord[sn].sndx; |
| 522 |
|
prob = hwt * (double)source[scp->sno].nhits / |
| 523 |
|
(double)source[scp->sno].ntests; |
| 524 |
< |
if (prob > 1.0) |
| 525 |
< |
prob = 1.0; |
| 642 |
< |
scalecolor(scp->val, prob); |
| 524 |
> |
if (prob < 1.0) |
| 525 |
> |
scalecolor(scp->val, prob); |
| 526 |
|
addcolor(r->rcol, scp->val); |
| 527 |
|
} |
| 528 |
|
} |
| 530 |
|
|
| 531 |
|
void |
| 532 |
|
srcscatter( /* compute source scattering into ray */ |
| 533 |
< |
register RAY *r |
| 533 |
> |
RAY *r |
| 534 |
|
) |
| 535 |
|
{ |
| 536 |
|
int oldsampndx; |
| 542 |
|
COLOR cvext; |
| 543 |
|
int i, j; |
| 544 |
|
|
| 545 |
< |
if (r->slights == NULL || r->slights[0] == 0 |
| 546 |
< |
|| r->gecc >= 1.-FTINY || r->rot >= FHUGE) |
| 545 |
> |
if (r->rot >= FHUGE || r->gecc >= 1.-FTINY) |
| 546 |
> |
return; /* this can never work */ |
| 547 |
> |
/* PMAP: do unconditional inscattering for volume photons */ |
| 548 |
> |
if (!volumePhotonMapping && (r->slights == NULL || r->slights[0] == 0)) |
| 549 |
|
return; |
| 550 |
+ |
|
| 551 |
|
if (ssampdist <= FTINY || (nsamps = r->rot/ssampdist + .5) < 1) |
| 552 |
|
nsamps = 1; |
| 553 |
|
#if MAXSSAMP |
| 556 |
|
#endif |
| 557 |
|
oldsampndx = samplendx; |
| 558 |
|
samplendx = random()&0x7fff; /* randomize */ |
| 559 |
< |
for (i = r->slights[0]; i > 0; i--) { /* for each source */ |
| 559 |
> |
for (i = volumePhotonMapping ? 1 : r->slights[0]; i > 0; i--) { |
| 560 |
> |
/* for each source OR once if volume photon map enabled */ |
| 561 |
|
for (j = 0; j < nsamps; j++) { /* for each sample position */ |
| 562 |
|
samplendx++; |
| 563 |
|
t = r->rot * (j+frandom())/nsamps; |
| 573 |
|
sr.rorg[0] = r->rorg[0] + r->rdir[0]*t; |
| 574 |
|
sr.rorg[1] = r->rorg[1] + r->rdir[1]*t; |
| 575 |
|
sr.rorg[2] = r->rorg[2] + r->rdir[2]*t; |
| 576 |
< |
sr.rmax = 0.; |
| 577 |
< |
initsrcindex(&si); /* sample ray to this source */ |
| 578 |
< |
si.sn = r->slights[i]; |
| 579 |
< |
nopart(&si, &sr); |
| 580 |
< |
if (!srcray(&sr, NULL, &si) || |
| 581 |
< |
sr.rsrc != r->slights[i]) |
| 582 |
< |
continue; /* no path */ |
| 583 |
< |
copycolor(sr.cext, r->cext); |
| 584 |
< |
copycolor(sr.albedo, r->albedo); |
| 585 |
< |
sr.gecc = r->gecc; |
| 586 |
< |
sr.slights = r->slights; |
| 587 |
< |
rayvalue(&sr); /* eval. source ray */ |
| 588 |
< |
if (bright(sr.rcol) <= FTINY) |
| 589 |
< |
continue; |
| 590 |
< |
if (r->gecc <= FTINY) /* compute P(theta) */ |
| 591 |
< |
d = 1.; |
| 592 |
< |
else { |
| 593 |
< |
d = DOT(r->rdir, sr.rdir); |
| 594 |
< |
d = 1. + r->gecc*r->gecc - 2.*r->gecc*d; |
| 595 |
< |
d = (1. - r->gecc*r->gecc) / (d*sqrt(d)); |
| 596 |
< |
} |
| 576 |
> |
|
| 577 |
> |
if (!volumePhotonMapping) { |
| 578 |
> |
initsrcindex(&si); /* sample ray to this source */ |
| 579 |
> |
si.sn = r->slights[i]; |
| 580 |
> |
nopart(&si, &sr); |
| 581 |
> |
if (!srcray(&sr, NULL, &si) || |
| 582 |
> |
sr.rsrc != r->slights[i]) |
| 583 |
> |
continue; /* no path */ |
| 584 |
> |
#if SHADCACHE |
| 585 |
> |
if (srcblocked(&sr)) /* check shadow cache */ |
| 586 |
> |
continue; |
| 587 |
> |
#endif |
| 588 |
> |
copycolor(sr.cext, r->cext); |
| 589 |
> |
copycolor(sr.albedo, r->albedo); |
| 590 |
> |
sr.gecc = r->gecc; |
| 591 |
> |
sr.slights = r->slights; |
| 592 |
> |
rayvalue(&sr); /* eval. source ray */ |
| 593 |
> |
if (bright(sr.rcol) <= FTINY) { |
| 594 |
> |
#if SHADCACHE |
| 595 |
> |
srcblocker(&sr); /* add blocker to cache */ |
| 596 |
> |
#endif |
| 597 |
> |
continue; |
| 598 |
> |
} |
| 599 |
> |
if (r->gecc <= FTINY) /* compute P(theta) */ |
| 600 |
> |
d = 1.; |
| 601 |
> |
else { |
| 602 |
> |
d = DOT(r->rdir, sr.rdir); |
| 603 |
> |
d = 1. + r->gecc*r->gecc - 2.*r->gecc*d; |
| 604 |
> |
d = (1. - r->gecc*r->gecc) / (d*sqrt(d)); |
| 605 |
> |
} |
| 606 |
|
/* other factors */ |
| 607 |
< |
d *= si.dom * r->rot / (4.*PI*nsamps); |
| 607 |
> |
d *= si.dom * r->rot / (4.*PI*nsamps); |
| 608 |
> |
scalecolor(sr.rcol, d); |
| 609 |
> |
} else { |
| 610 |
> |
/* PMAP: Add ambient inscattering from |
| 611 |
> |
* volume photons; note we reverse the |
| 612 |
> |
* incident ray direction since we're |
| 613 |
> |
* now in *backward* raytracing mode! */ |
| 614 |
> |
sr.rdir [0] = -r -> rdir [0]; |
| 615 |
> |
sr.rdir [1] = -r -> rdir [1]; |
| 616 |
> |
sr.rdir [2] = -r -> rdir [2]; |
| 617 |
> |
sr.gecc = r -> gecc; |
| 618 |
> |
inscatterVolumePmap(&sr, sr.rcol); |
| 619 |
> |
scalecolor(sr.rcol, r -> rot / nsamps); |
| 620 |
> |
} |
| 621 |
|
multcolor(sr.rcol, r->cext); |
| 622 |
|
multcolor(sr.rcol, r->albedo); |
| 714 |
– |
scalecolor(sr.rcol, d); |
| 623 |
|
multcolor(sr.rcol, cvext); |
| 624 |
|
addcolor(r->rcol, sr.rcol); /* add it in */ |
| 625 |
|
} |
| 645 |
|
*/ |
| 646 |
|
|
| 647 |
|
static int |
| 648 |
< |
weaksrcmat(int obj) /* identify material */ |
| 648 |
> |
weaksrcmat(OBJECT obj) /* identify material */ |
| 649 |
|
{ |
| 650 |
< |
register OBJREC *o = objptr(obj); |
| 650 |
> |
OBJREC *m = findmaterial(objptr(obj)); |
| 651 |
|
|
| 652 |
< |
while (!ismaterial(o->otype)) /* find material */ |
| 653 |
< |
o = objptr(o->omod); |
| 746 |
< |
return((o->otype==MAT_ILLUM)|(o->otype==MAT_GLOW)); |
| 652 |
> |
if (m == NULL) return(0); |
| 653 |
> |
return((m->otype==MAT_ILLUM) | (m->otype==MAT_GLOW)); |
| 654 |
|
} |
| 655 |
|
|
| 656 |
|
#define illumblock(m, r) (!(source[r->rsrc].sflags&SVIRTUAL) && \ |
| 686 |
|
* The same is true for stray specular samples, since the specular |
| 687 |
|
* contribution from light sources is calculated separately. |
| 688 |
|
*/ |
| 689 |
< |
|
| 690 |
< |
#define badcomponent(m, r) (r->crtype&(AMBIENT|SPECULAR) && \ |
| 689 |
> |
/* PMAP: Also avoid counting sources via transferred ambient rays (e.g. |
| 690 |
> |
* through glass) when photon mapping is enabled, as these indirect |
| 691 |
> |
* components are already accounted for. |
| 692 |
> |
*/ |
| 693 |
> |
#define badcomponent(m, r) (srcRayInPmap(r) || \ |
| 694 |
> |
(r->crtype&(AMBIENT|SPECULAR) && \ |
| 695 |
|
!(r->crtype&SHADOW || r->rod < 0.0 || \ |
| 696 |
< |
/* not 100% correct */ distglow(m, r, r->rot))) |
| 696 |
> |
/* not 100% correct */ distglow(m, r, r->rot)))) |
| 697 |
|
|
| 698 |
|
/* passillum * |
| 699 |
|
* |
| 717 |
|
|
| 718 |
|
int |
| 719 |
|
m_light( /* ray hit a light source */ |
| 720 |
< |
register OBJREC *m, |
| 721 |
< |
register RAY *r |
| 720 |
> |
OBJREC *m, |
| 721 |
> |
RAY *r |
| 722 |
|
) |
| 723 |
|
{ |
| 724 |
|
/* check for over-counting */ |
| 725 |
< |
if (badcomponent(m, r)) |
| 725 |
> |
if (badcomponent(m, r)) { |
| 726 |
> |
setcolor(r->rcoef, 0.0, 0.0, 0.0); |
| 727 |
|
return(1); |
| 728 |
< |
if (wrongsource(m, r)) |
| 728 |
> |
} |
| 729 |
> |
if (wrongsource(m, r)) { |
| 730 |
> |
setcolor(r->rcoef, 0.0, 0.0, 0.0); |
| 731 |
|
return(1); |
| 732 |
+ |
} |
| 733 |
|
/* check for passed illum */ |
| 734 |
|
if (passillum(m, r)) { |
| 735 |
|
if (m->oargs.nsargs && strcmp(m->oargs.sarg[0], VOIDID)) |
| 737 |
|
raytrans(r); |
| 738 |
|
return(1); |
| 739 |
|
} |
| 740 |
+ |
/* check for invisibility */ |
| 741 |
+ |
if (srcignore(m, r)) { |
| 742 |
+ |
setcolor(r->rcoef, 0.0, 0.0, 0.0); |
| 743 |
+ |
return(1); |
| 744 |
+ |
} |
| 745 |
|
/* otherwise treat as source */ |
| 746 |
|
/* check for behind */ |
| 747 |
|
if (r->rod < 0.0) |
| 828 |
– |
return(1); |
| 829 |
– |
/* check for invisibility */ |
| 830 |
– |
if (srcignore(m, r)) |
| 748 |
|
return(1); |
| 749 |
|
/* check for outside spot */ |
| 750 |
|
if (m->otype==MAT_SPOT && spotout(r, makespot(m))) |
