| 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 |
|
} |
