1 |
< |
/* Copyright (c) 1991 Regents of the University of California */ |
1 |
> |
/* Copyright (c) 1995 Regents of the University of California */ |
2 |
|
|
3 |
|
#ifndef lint |
4 |
|
static char SCCSid[] = "$SunId$ LBL"; |
126 |
|
m = objptr(i); |
127 |
|
if (m->otype != MAT_ILLUM || m->oargs.nsargs < 1 || |
128 |
|
!strcmp(m->oargs.sarg[0], VOIDID) || |
129 |
< |
(i = modifier(m->oargs.sarg[0])) < 0) |
129 |
> |
(i = modifier(m->oargs.sarg[0])) == OVOID) |
130 |
|
return(m); /* direct modifier */ |
131 |
|
return(objptr(i)); /* illum alternate */ |
132 |
|
} |
301 |
|
FVECT offsdir; |
302 |
|
SRCINDEX si; |
303 |
|
double or, d; |
304 |
– |
int infront; |
304 |
|
int stestlim, ssn; |
305 |
|
int nhit, nok; |
306 |
|
register int i, n; |
313 |
|
if (source[sn].sflags & SDISTANT) { |
314 |
|
/* 32. == heuristic constant */ |
315 |
|
n = 32.*or2/(thescene.cusize*thescene.cusize)*vspretest + .5; |
317 |
– |
infront = DOT(onorm, source[sn].sloc) > 0.; |
316 |
|
} else { |
317 |
|
for (i = 0; i < 3; i++) |
318 |
|
offsdir[i] = source[sn].sloc[i] - oc[i]; |
321 |
|
n = 2.*PI * vspretest + .5; |
322 |
|
else |
323 |
|
n = 2.*PI * (1.-sqrt(1./(1.+or2/d)))*vspretest + .5; |
326 |
– |
infront = DOT(onorm, offsdir) > 0.; |
324 |
|
} |
325 |
|
if (n < MINSAMPLES) n = MINSAMPLES; |
326 |
|
#ifdef DEBUG |
332 |
|
stestlim = n*STESTMAX; |
333 |
|
ssn = 0; |
334 |
|
nhit = nok = 0; |
335 |
+ |
initsrcindex(&si); |
336 |
|
while (n-- > 0) { |
337 |
|
/* get sample point */ |
338 |
|
do { |
346 |
|
for (i = 0; i < 3; i++) |
347 |
|
offsdir[i] = or*(1. - 2.*offsdir[i]); |
348 |
|
ssn++; |
349 |
< |
for (i = 0; i < 3; i++) |
350 |
< |
sr.rorg[i] = oc[i] + offsdir[i]; |
351 |
< |
d = DOT(offsdir,onorm); |
352 |
< |
if (infront) |
353 |
< |
for (i = 0; i < 3; i++) { |
354 |
< |
sr.rorg[i] -= (d-.0001)*onorm[i]; |
357 |
< |
sr.rdir[i] = -onorm[i]; |
358 |
< |
} |
359 |
< |
else |
360 |
< |
for (i = 0; i < 3; i++) { |
361 |
< |
sr.rorg[i] -= (d+.0001)*onorm[i]; |
362 |
< |
sr.rdir[i] = onorm[i]; |
363 |
< |
} |
349 |
> |
d = 1. - DOT(offsdir, onorm); |
350 |
> |
for (i = 0; i < 3; i++) { |
351 |
> |
sr.rorg[i] = oc[i] + offsdir[i] + d*onorm[i]; |
352 |
> |
sr.rdir[i] = -onorm[i]; |
353 |
> |
} |
354 |
> |
sr.rmax = 0.0; |
355 |
|
rayorigin(&sr, NULL, PRIMARY, 1.0); |
356 |
|
} while (!(*ofun[o->otype].funp)(o, &sr)); |
357 |
|
/* check against source */ |
358 |
< |
initsrcindex(&si); |
368 |
< |
si.sn = sn; |
369 |
< |
nopart(&si, &sr); |
358 |
> |
VCOPY(sr.rorg, sr.rop); /* starting from intersection */ |
359 |
|
samplendx++; |
360 |
< |
if (!srcray(&sr, NULL, &si) || sr.rsrc != sn) |
361 |
< |
continue; |
360 |
> |
if (si.sp >= si.np-1 || |
361 |
> |
!srcray(&sr, NULL, &si) || sr.rsrc != sn) { |
362 |
> |
si.sn = sn-1; /* reset index to our source */ |
363 |
> |
si.np = 0; |
364 |
> |
if (!srcray(&sr, NULL, &si) || sr.rsrc != sn) |
365 |
> |
continue; /* can't get there from here */ |
366 |
> |
} |
367 |
|
sr.revf = srcvalue; |
368 |
< |
rayvalue(&sr); |
368 |
> |
rayvalue(&sr); /* check sample validity */ |
369 |
|
if (bright(sr.rcol) <= FTINY) |
370 |
|
continue; |
371 |
< |
nok++; |
378 |
< |
/* check against obstructions */ |
371 |
> |
nok++; /* got sample; check obstructions */ |
372 |
|
rayclear(&sr); |
373 |
|
sr.revf = raytrace; |
374 |
|
rayvalue(&sr); |