250 |
|
} else { |
251 |
|
for (i = 0; i < 3; i++) /* perturb */ |
252 |
|
nd.prdir[i] = r->rdir[i] - |
253 |
< |
.75*r->pert[i]; |
253 |
> |
0.5*r->pert[i]; |
254 |
|
if (DOT(nd.prdir, r->ron) < -FTINY) |
255 |
|
normalize(nd.prdir); /* OK */ |
256 |
|
else |
389 |
|
ndims--; |
390 |
|
} |
391 |
|
/* compute transmission */ |
392 |
+ |
if ((np->specfl & (SP_TRAN|SP_TBLT)) == SP_TRAN && |
393 |
+ |
rayorigin(&sr, r, SPECULAR, np->tspec) == 0) { |
394 |
+ |
dimlist[ndims++] = (int)np->mp; |
395 |
+ |
d = urand(ilhash(dimlist,ndims)+1823+samplendx); |
396 |
+ |
multisamp(rv, 2, d); |
397 |
+ |
d = 2.0*PI * rv[0]; |
398 |
+ |
cosp = cos(d); |
399 |
+ |
sinp = sin(d); |
400 |
+ |
rv[1] = 1.0 - specjitter*rv[1]; |
401 |
+ |
if (rv[1] <= FTINY) |
402 |
+ |
d = 1.0; |
403 |
+ |
else |
404 |
+ |
d = sqrt(-log(rv[1]) / |
405 |
+ |
(cosp*cosp*4./(np->u_alpha*np->u_alpha) + |
406 |
+ |
sinp*sinp*4./(np->v_alpha*np->v_alpha))); |
407 |
+ |
for (i = 0; i < 3; i++) |
408 |
+ |
sr.rdir[i] = np->prdir[i] + |
409 |
+ |
d*(cosp*np->u[i] + sinp*np->v[i]); |
410 |
+ |
if (DOT(sr.rdir, r->ron) < -FTINY) |
411 |
+ |
normalize(sr.rdir); /* OK, normalize */ |
412 |
+ |
else |
413 |
+ |
VCOPY(sr.rdir, np->prdir); /* else no jitter */ |
414 |
+ |
rayvalue(&sr); |
415 |
+ |
multcolor(sr.rcol, np->scolor); |
416 |
+ |
addcolor(r->rcol, sr.rcol); |
417 |
+ |
ndims--; |
418 |
+ |
} |
419 |
|
} |