1 |
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/* 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 |
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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 |
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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 |
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/* 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 |
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nomat: |
191 |
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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 |
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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 |
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cntord[sn].brt = bright(srccnt[sn].coef); |
274 |
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(*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) |
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continue; |
278 |
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VCOPY(srccnt[sn].dir, sr.rdir); |
278 |
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VCOPY(scp->dir, sr.rdir); |
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/* compute potential */ |
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sr.revf = srcvalue; |
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rayvalue(&sr); |
282 |
< |
copycolor(srccnt[sn].val, sr.rcol); |
283 |
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multcolor(srccnt[sn].val, srccnt[sn].coef); |
284 |
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cntord[sn].brt = bright(srccnt[sn].val); |
282 |
> |
copycolor(scp->val, sr.rcol); |
283 |
> |
multcolor(scp->val, scp->coef); |
284 |
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cntord[sn].brt = bright(scp->val); |
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} |
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/* sort contributions */ |
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qsort(cntord, sn, sizeof(CNTPTR), cntcmp); |
308 |
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/* modify threshold */ |
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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 |
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} |
339 |
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/* add contribution if hit */ |
340 |
< |
addcolor(r->rcol, srccnt[cntord[sn].sndx].val); |
340 |
> |
addcolor(r->rcol, scp->val); |
341 |
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nhits++; |
342 |
< |
source[sr.rsrc].nhits++; |
342 |
> |
source[scp->sno].nhits++; |
343 |
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} |
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 |
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else |
348 |
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hwt = 0.5; |
349 |
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#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 |
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} |
364 |
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} |
365 |
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|
369 |
|
* because they are very nasty and difficult to understand. |
370 |
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*/ |
371 |
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|
372 |
< |
/* wrongillum * |
372 |
> |
/* illumblock * |
373 |
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* |
374 |
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* We cannot allow an illum to pass to another illum, because that |
375 |
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* would almost certainly constitute overcounting. |
376 |
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* However, we do allow an illum to pass to another illum |
377 |
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* 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 |
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*/ |
382 |
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|
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 |
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|
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 |
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|
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 |
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|
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 |
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|
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 |
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|
444 |
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|
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 |
|
} |