| 1 |
< |
/* Copyright (c) 1992 Regents of the University of California */ |
| 1 |
> |
/* Copyright (c) 1995 Regents of the University of California */ |
| 2 |
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|
| 3 |
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#ifndef lint |
| 4 |
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static char SCCSid[] = "$SunId$ LBL"; |
| 68 |
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o->otype != OBJ_SOURCE && |
| 69 |
|
m->oargs.farg[3] <= FTINY) |
| 70 |
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continue; /* don't bother */ |
| 71 |
+ |
if (m->oargs.farg[0] <= FTINY && m->oargs.farg[1] <= FTINY && |
| 72 |
+ |
m->oargs.farg[2] <= FTINY) |
| 73 |
+ |
continue; /* don't bother */ |
| 74 |
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|
| 75 |
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if (sfun[o->otype].of == NULL || |
| 76 |
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sfun[o->otype].of->setsrc == NULL) |
| 84 |
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if (m->otype == MAT_GLOW) { |
| 85 |
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source[ns].sflags |= SPROX; |
| 86 |
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source[ns].sl.prox = m->oargs.farg[3]; |
| 87 |
< |
if (o->otype == OBJ_SOURCE) |
| 87 |
> |
if (source[ns].sflags & SDISTANT) |
| 88 |
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source[ns].sflags |= SSKIP; |
| 89 |
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} else if (m->otype == MAT_SPOT) { |
| 90 |
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source[ns].sflags |= SSPOT; |
| 131 |
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sr->rsrc = si->sn; /* remember source */ |
| 132 |
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srcp = source + si->sn; |
| 133 |
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if (srcp->sflags & SDISTANT) { |
| 134 |
< |
if (srcp->sflags & SSPOT && spotout(sr, srcp->sl.s, 1)) |
| 134 |
> |
if (srcp->sflags & SSPOT && spotout(sr, srcp->sl.s)) |
| 135 |
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continue; |
| 136 |
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return(1); /* sample OK */ |
| 137 |
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} |
| 141 |
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continue; |
| 142 |
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/* check angle */ |
| 143 |
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if (srcp->sflags & SSPOT) { |
| 144 |
< |
if (spotout(sr, srcp->sl.s, 0)) |
| 144 |
> |
if (spotout(sr, srcp->sl.s)) |
| 145 |
|
continue; |
| 146 |
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/* adjust solid angle */ |
| 147 |
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si->dom *= d*d; |
| 155 |
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|
| 156 |
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|
| 157 |
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srcvalue(r) /* punch ray to source and compute value */ |
| 158 |
< |
RAY *r; |
| 158 |
> |
register RAY *r; |
| 159 |
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{ |
| 160 |
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register SRCREC *sp; |
| 161 |
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|
| 164 |
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/* check intersection */ |
| 165 |
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if (!(*ofun[sp->so->otype].funp)(sp->so, r)) |
| 166 |
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return; |
| 167 |
< |
raycont(r); /* compute contribution */ |
| 167 |
> |
if (!rayshade(r, r->ro->omod)) /* compute contribution */ |
| 168 |
> |
goto nomat; |
| 169 |
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return; |
| 170 |
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} |
| 171 |
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/* compute intersection */ |
| 173 |
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(*ofun[sp->so->otype].funp)(sp->so, r)) { |
| 174 |
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if (sp->sa.success >= 0) |
| 175 |
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sp->sa.success++; |
| 176 |
< |
raycont(r); /* compute contribution */ |
| 176 |
> |
if (!rayshade(r, r->ro->omod)) /* compute contribution */ |
| 177 |
> |
goto nomat; |
| 178 |
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return; |
| 179 |
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} |
| 180 |
+ |
/* we missed our mark! */ |
| 181 |
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if (sp->sa.success < 0) |
| 182 |
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return; /* bitched already */ |
| 183 |
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sp->sa.success -= AIMREQT; |
| 186 |
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sprintf(errmsg, "aiming failure for light source \"%s\"", |
| 187 |
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sp->so->oname); |
| 188 |
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error(WARNING, errmsg); /* issue warning */ |
| 189 |
+ |
return; |
| 190 |
+ |
nomat: |
| 191 |
+ |
objerror(r->ro, USER, "material not found"); |
| 192 |
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} |
| 193 |
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|
| 194 |
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|
| 246 |
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{ |
| 247 |
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extern int (*trace)(); |
| 248 |
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register int sn; |
| 249 |
+ |
register CONTRIB *scp; |
| 250 |
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SRCINDEX si; |
| 251 |
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int nshadcheck, ncnts; |
| 252 |
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int nhits; |
| 268 |
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error(SYSTEM, "out of memory in direct"); |
| 269 |
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} |
| 270 |
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cntord[sn].sndx = sn; |
| 271 |
< |
srccnt[sn].sno = sr.rsrc; |
| 271 |
> |
scp = srccnt + sn; |
| 272 |
> |
scp->sno = sr.rsrc; |
| 273 |
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/* compute coefficient */ |
| 274 |
< |
(*f)(srccnt[sn].coef, p, sr.rdir, si.dom); |
| 275 |
< |
cntord[sn].brt = bright(srccnt[sn].coef); |
| 274 |
> |
(*f)(scp->coef, p, sr.rdir, si.dom); |
| 275 |
> |
cntord[sn].brt = bright(scp->coef); |
| 276 |
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if (cntord[sn].brt <= 0.0) |
| 277 |
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continue; |
| 278 |
< |
VCOPY(srccnt[sn].dir, sr.rdir); |
| 278 |
> |
VCOPY(scp->dir, sr.rdir); |
| 279 |
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/* compute potential */ |
| 280 |
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sr.revf = srcvalue; |
| 281 |
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rayvalue(&sr); |
| 282 |
< |
copycolor(srccnt[sn].val, sr.rcol); |
| 283 |
< |
multcolor(srccnt[sn].val, srccnt[sn].coef); |
| 284 |
< |
cntord[sn].brt = bright(srccnt[sn].val); |
| 282 |
> |
copycolor(scp->val, sr.rcol); |
| 283 |
> |
multcolor(scp->val, scp->coef); |
| 284 |
> |
cntord[sn].brt = bright(scp->val); |
| 285 |
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} |
| 286 |
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/* sort contributions */ |
| 287 |
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qsort(cntord, sn, sizeof(CNTPTR), cntcmp); |
| 308 |
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/* modify threshold */ |
| 309 |
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ourthresh = shadthresh / r->rweight; |
| 310 |
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/* test for shadows */ |
| 311 |
< |
nhits = 0; |
| 312 |
< |
for (sn = 0; sn < ncnts; sn++) { |
| 311 |
> |
for (nhits = 0, hwt = 0.0, sn = 0; sn < ncnts; |
| 312 |
> |
hwt += (double)source[scp->sno].nhits / |
| 313 |
> |
(double)source[scp->sno].ntests, |
| 314 |
> |
sn++) { |
| 315 |
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/* check threshold */ |
| 316 |
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if ((sn+nshadcheck>=ncnts ? cntord[sn].brt : |
| 317 |
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cntord[sn].brt-cntord[sn+nshadcheck].brt) |
| 318 |
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< ourthresh*bright(r->rcol)) |
| 319 |
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break; |
| 320 |
+ |
scp = srccnt + cntord[sn].sndx; |
| 321 |
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/* test for hit */ |
| 322 |
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rayorigin(&sr, r, SHADOW, 1.0); |
| 323 |
< |
VCOPY(sr.rdir, srccnt[cntord[sn].sndx].dir); |
| 324 |
< |
sr.rsrc = srccnt[cntord[sn].sndx].sno; |
| 325 |
< |
source[sr.rsrc].ntests++; /* keep statistics */ |
| 323 |
> |
VCOPY(sr.rdir, scp->dir); |
| 324 |
> |
sr.rsrc = scp->sno; |
| 325 |
> |
source[scp->sno].ntests++; /* keep statistics */ |
| 326 |
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if (localhit(&sr, &thescene) && |
| 327 |
< |
( sr.ro != source[sr.rsrc].so || |
| 328 |
< |
source[sr.rsrc].sflags & SFOLLOW )) { |
| 327 |
> |
( sr.ro != source[scp->sno].so || |
| 328 |
> |
source[scp->sno].sflags & SFOLLOW )) { |
| 329 |
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/* follow entire path */ |
| 330 |
< |
raycont(&sr); |
| 330 |
> |
if (!raycont(&sr)) |
| 331 |
> |
objerror(sr.ro, USER, "material not found"); |
| 332 |
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if (trace != NULL) |
| 333 |
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(*trace)(&sr); /* trace execution */ |
| 334 |
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if (bright(sr.rcol) <= FTINY) |
| 335 |
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continue; /* missed! */ |
| 336 |
< |
copycolor(srccnt[cntord[sn].sndx].val, sr.rcol); |
| 337 |
< |
multcolor(srccnt[cntord[sn].sndx].val, |
| 323 |
< |
srccnt[cntord[sn].sndx].coef); |
| 336 |
> |
copycolor(scp->val, sr.rcol); |
| 337 |
> |
multcolor(scp->val, scp->coef); |
| 338 |
|
} |
| 339 |
|
/* add contribution if hit */ |
| 340 |
< |
addcolor(r->rcol, srccnt[cntord[sn].sndx].val); |
| 340 |
> |
addcolor(r->rcol, scp->val); |
| 341 |
|
nhits++; |
| 342 |
< |
source[sr.rsrc].nhits++; |
| 342 |
> |
source[scp->sno].nhits++; |
| 343 |
|
} |
| 344 |
< |
/* surface hit rate */ |
| 345 |
< |
if (sn > 0) |
| 346 |
< |
hwt = (double)nhits / (double)sn; |
| 344 |
> |
/* source hit rate */ |
| 345 |
> |
if (hwt > FTINY) |
| 346 |
> |
hwt = (double)nhits / hwt; |
| 347 |
|
else |
| 348 |
|
hwt = 0.5; |
| 349 |
|
#ifdef DEBUG |
| 350 |
< |
sprintf(errmsg, "%d tested, %d untested, %f hit rate\n", |
| 350 |
> |
sprintf(errmsg, "%d tested, %d untested, %f conditional hit rate\n", |
| 351 |
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sn, ncnts-sn, hwt); |
| 352 |
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eputs(errmsg); |
| 353 |
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#endif |
| 354 |
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/* add in untested sources */ |
| 355 |
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for ( ; sn < ncnts; sn++) { |
| 356 |
< |
sr.rsrc = srccnt[cntord[sn].sndx].sno; |
| 357 |
< |
prob = hwt * (double)source[sr.rsrc].nhits / |
| 358 |
< |
(double)source[sr.rsrc].ntests; |
| 359 |
< |
scalecolor(srccnt[cntord[sn].sndx].val, prob); |
| 360 |
< |
addcolor(r->rcol, srccnt[cntord[sn].sndx].val); |
| 356 |
> |
scp = srccnt + cntord[sn].sndx; |
| 357 |
> |
prob = hwt * (double)source[scp->sno].nhits / |
| 358 |
> |
(double)source[scp->sno].ntests; |
| 359 |
> |
if (prob > 1.0) |
| 360 |
> |
prob = 1.0; |
| 361 |
> |
scalecolor(scp->val, prob); |
| 362 |
> |
addcolor(r->rcol, scp->val); |
| 363 |
|
} |
| 364 |
|
} |
| 365 |
|
|
| 369 |
|
* because they are very nasty and difficult to understand. |
| 370 |
|
*/ |
| 371 |
|
|
| 372 |
< |
/* wrongillum * |
| 372 |
> |
/* illumblock * |
| 373 |
|
* |
| 374 |
|
* We cannot allow an illum to pass to another illum, because that |
| 375 |
|
* would almost certainly constitute overcounting. |
| 376 |
|
* However, we do allow an illum to pass to another illum |
| 377 |
|
* that is actually going to relay to a virtual light source. |
| 378 |
+ |
* We also prevent an illum from passing to a glow; this provides a |
| 379 |
+ |
* convenient mechanism for defining detailed light source |
| 380 |
+ |
* geometry behind (or inside) an effective radiator. |
| 381 |
|
*/ |
| 382 |
|
|
| 383 |
< |
#define wrongillum(m, r) (!(source[r->rsrc].sflags&SVIRTUAL) && \ |
| 384 |
< |
objptr(source[r->rsrc].so->omod)->otype==MAT_ILLUM) |
| 383 |
> |
static int weaksrcmod(obj) int obj; /* efficiency booster function */ |
| 384 |
> |
{register OBJREC *o = objptr(obj); |
| 385 |
> |
return(o->otype==MAT_ILLUM|o->otype==MAT_GLOW);} |
| 386 |
|
|
| 387 |
+ |
#define illumblock(m, r) (!(source[r->rsrc].sflags&SVIRTUAL) && \ |
| 388 |
+ |
r->rod > 0.0 && \ |
| 389 |
+ |
weaksrcmod(source[r->rsrc].so->omod)) |
| 390 |
+ |
|
| 391 |
|
/* wrongsource * |
| 392 |
|
* |
| 393 |
|
* This source is the wrong source (ie. overcounted) if we are |
| 394 |
|
* aimed to a different source than the one we hit and the one |
| 395 |
< |
* we hit is not an illum which should be passed. |
| 395 |
> |
* we hit is not an illum that should be passed. |
| 396 |
|
*/ |
| 397 |
|
|
| 398 |
|
#define wrongsource(m, r) (r->rsrc>=0 && source[r->rsrc].so!=r->ro && \ |
| 399 |
< |
(m->otype!=MAT_ILLUM || wrongillum(m,r))) |
| 399 |
> |
(m->otype!=MAT_ILLUM || illumblock(m,r))) |
| 400 |
|
|
| 401 |
|
/* distglow * |
| 402 |
|
* |
| 403 |
|
* A distant glow is an object that sometimes acts as a light source, |
| 404 |
|
* but is too far away from the test point to be one in this case. |
| 405 |
+ |
* (Glows with negative radii should NEVER participate in illumination.) |
| 406 |
|
*/ |
| 407 |
|
|
| 408 |
< |
#define distglow(m, r) (m->otype==MAT_GLOW && \ |
| 409 |
< |
r->rot > m->oargs.farg[3]) |
| 408 |
> |
#define distglow(m, r, d) (m->otype==MAT_GLOW && \ |
| 409 |
> |
m->oargs.farg[3] >= -FTINY && \ |
| 410 |
> |
d > m->oargs.farg[3]) |
| 411 |
|
|
| 412 |
|
/* badcomponent * |
| 413 |
|
* |
| 420 |
|
|
| 421 |
|
#define badcomponent(m, r) (r->crtype&(AMBIENT|SPECULAR) && \ |
| 422 |
|
!(r->crtype&SHADOW || r->rod < 0.0 || \ |
| 423 |
< |
distglow(m, r))) |
| 423 |
> |
/* not 100% correct */ distglow(m, r, r->rot))) |
| 424 |
|
|
| 399 |
– |
/* overcount * |
| 400 |
– |
* |
| 401 |
– |
* All overcounting possibilities are contained here. |
| 402 |
– |
*/ |
| 403 |
– |
|
| 404 |
– |
#define overcount(m, r) (badcomponent(m,r) || wrongsource(m,r)) |
| 405 |
– |
|
| 425 |
|
/* passillum * |
| 426 |
|
* |
| 427 |
|
* An illum passes to another material type when we didn't hit it |
| 435 |
|
|
| 436 |
|
/* srcignore * |
| 437 |
|
* |
| 438 |
< |
* The -di flag renders light sources invisible, and here is the test. |
| 438 |
> |
* The -dv flag is normally on for sources to be visible. |
| 439 |
|
*/ |
| 440 |
|
|
| 441 |
< |
#define srcignore(m, r) (directinvis && !(r->crtype&SHADOW) && \ |
| 442 |
< |
!distglow(m, r)) |
| 441 |
> |
#define srcignore(m, r) !(directvis || r->crtype&SHADOW || \ |
| 442 |
> |
distglow(m, r, raydist(r,PRIMARY))) |
| 443 |
|
|
| 444 |
|
|
| 445 |
|
m_light(m, r) /* ray hit a light source */ |
| 447 |
|
register RAY *r; |
| 448 |
|
{ |
| 449 |
|
/* check for over-counting */ |
| 450 |
< |
if (overcount(m, r)) |
| 451 |
< |
return; |
| 450 |
> |
if (badcomponent(m, r)) |
| 451 |
> |
return(1); |
| 452 |
> |
if (wrongsource(m, r)) |
| 453 |
> |
return(1); |
| 454 |
|
/* check for passed illum */ |
| 455 |
|
if (passillum(m, r)) { |
| 456 |
< |
if (m->oargs.nsargs < 1 || !strcmp(m->oargs.sarg[0], VOIDID)) |
| 457 |
< |
raytrans(r); |
| 458 |
< |
else |
| 459 |
< |
rayshade(r, modifier(m->oargs.sarg[0])); |
| 439 |
< |
return; |
| 456 |
> |
if (m->oargs.nsargs && strcmp(m->oargs.sarg[0], VOIDID)) |
| 457 |
> |
return(rayshade(r, modifier(m->oargs.sarg[0]))); |
| 458 |
> |
raytrans(r); |
| 459 |
> |
return(1); |
| 460 |
|
} |
| 461 |
|
/* otherwise treat as source */ |
| 462 |
|
/* check for behind */ |
| 463 |
|
if (r->rod < 0.0) |
| 464 |
< |
return; |
| 464 |
> |
return(1); |
| 465 |
|
/* check for invisibility */ |
| 466 |
|
if (srcignore(m, r)) |
| 467 |
< |
return; |
| 467 |
> |
return(1); |
| 468 |
|
/* check for outside spot */ |
| 469 |
< |
if (m->otype==MAT_SPOT && spotout(r, (SPOT *)m->os, r->rot>=FHUGE)) |
| 470 |
< |
return; |
| 469 |
> |
if (m->otype==MAT_SPOT && spotout(r, makespot(m))) |
| 470 |
> |
return(1); |
| 471 |
|
/* get distribution pattern */ |
| 472 |
|
raytexture(r, m->omod); |
| 473 |
|
/* get source color */ |
| 476 |
|
m->oargs.farg[2]); |
| 477 |
|
/* modify value */ |
| 478 |
|
multcolor(r->rcol, r->pcol); |
| 479 |
+ |
return(1); |
| 480 |
|
} |
