61 |
|
double pdot; /* perturbed dot product */ |
62 |
|
} ANISODAT; /* anisotropic material data */ |
63 |
|
|
64 |
< |
static void getacoords(RAY *r, ANISODAT *np); |
65 |
< |
static void agaussamp(RAY *r, ANISODAT *np); |
64 |
> |
static void getacoords(ANISODAT *np); |
65 |
> |
static void agaussamp(ANISODAT *np); |
66 |
|
|
67 |
|
|
68 |
|
static void |
266 |
|
if (r->ro != NULL && isflat(r->ro->otype)) |
267 |
|
nd.specfl |= SP_FLAT; |
268 |
|
|
269 |
< |
getacoords(r, &nd); /* set up coordinates */ |
269 |
> |
getacoords(&nd); /* set up coordinates */ |
270 |
|
|
271 |
|
if (nd.specfl & (SP_REFL|SP_TRAN) && !(nd.specfl & SP_BADU)) |
272 |
< |
agaussamp(r, &nd); |
272 |
> |
agaussamp(&nd); |
273 |
|
|
274 |
|
if (nd.rdiff > FTINY) { /* ambient from this side */ |
275 |
|
copycolor(ctmp, nd.mcolor); /* modified by material color */ |
304 |
|
|
305 |
|
static void |
306 |
|
getacoords( /* set up coordinate system */ |
307 |
– |
RAY *r, |
307 |
|
ANISODAT *np |
308 |
|
) |
309 |
|
{ |
311 |
|
int i; |
312 |
|
|
313 |
|
mf = getfunc(np->mp, 3, 0x7, 1); |
314 |
< |
setfunc(np->mp, r); |
314 |
> |
setfunc(np->mp, np->rp); |
315 |
|
errno = 0; |
316 |
|
for (i = 0; i < 3; i++) |
317 |
|
np->u[i] = evalue(mf->ep[i]); |
334 |
|
|
335 |
|
static void |
336 |
|
agaussamp( /* sample anisotropic Gaussian specular */ |
338 |
– |
RAY *r, |
337 |
|
ANISODAT *np |
338 |
|
) |
339 |
|
{ |
346 |
|
int i; |
347 |
|
/* compute reflection */ |
348 |
|
if ((np->specfl & (SP_REFL|SP_RBLT)) == SP_REFL && |
349 |
< |
rayorigin(&sr, SPECULAR, r, np->scolor) == 0) { |
349 |
> |
rayorigin(&sr, SPECULAR, np->rp, np->scolor) == 0) { |
350 |
|
nstarget = 1; |
351 |
|
if (specjitter > 1.5) { /* multiple samples? */ |
352 |
< |
nstarget = specjitter*r->rweight + .5; |
352 |
> |
nstarget = specjitter*np->rp->rweight + .5; |
353 |
|
if (sr.rweight <= minweight*nstarget) |
354 |
|
nstarget = sr.rweight/minweight; |
355 |
|
if (nstarget > 1) { |
386 |
|
for (i = 0; i < 3; i++) |
387 |
|
h[i] = np->pnorm[i] + |
388 |
|
d*(cosp*np->u[i] + sinp*np->v[i]); |
389 |
< |
d = -2.0 * DOT(h, r->rdir) / (1.0 + d*d); |
390 |
< |
VSUM(sr.rdir, r->rdir, h, d); |
389 |
> |
d = -2.0 * DOT(h, np->rp->rdir) / (1.0 + d*d); |
390 |
> |
VSUM(sr.rdir, np->rp->rdir, h, d); |
391 |
|
/* sample rejection test */ |
392 |
< |
if ((d = DOT(sr.rdir, r->ron)) <= FTINY) |
392 |
> |
if ((d = DOT(sr.rdir, np->rp->ron)) <= FTINY) |
393 |
|
continue; |
394 |
|
checknorm(sr.rdir); |
395 |
|
if (nstarget > 1) { /* W-G-M-D adjustment */ |
396 |
|
if (nstaken) rayclear(&sr); |
397 |
|
rayvalue(&sr); |
398 |
< |
d = 2./(1. + r->rod/d); |
398 |
> |
d = 2./(1. + np->rp->rod/d); |
399 |
|
scalecolor(sr.rcol, d); |
400 |
|
addcolor(scol, sr.rcol); |
401 |
|
} else { |
402 |
|
rayvalue(&sr); |
403 |
|
multcolor(sr.rcol, sr.rcoef); |
404 |
< |
addcolor(r->rcol, sr.rcol); |
404 |
> |
addcolor(np->rp->rcol, sr.rcol); |
405 |
|
} |
406 |
|
++nstaken; |
407 |
|
} |
409 |
|
multcolor(scol, sr.rcoef); |
410 |
|
d = (double)nstarget/ntrials; |
411 |
|
scalecolor(scol, d); |
412 |
< |
addcolor(r->rcol, scol); |
412 |
> |
addcolor(np->rp->rcol, scol); |
413 |
|
} |
414 |
|
ndims--; |
415 |
|
} |
417 |
|
copycolor(sr.rcoef, np->mcolor); /* modify by material color */ |
418 |
|
scalecolor(sr.rcoef, np->tspec); |
419 |
|
if ((np->specfl & (SP_TRAN|SP_TBLT)) == SP_TRAN && |
420 |
< |
rayorigin(&sr, SPECULAR, r, sr.rcoef) == 0) { |
420 |
> |
rayorigin(&sr, SPECULAR, np->rp, sr.rcoef) == 0) { |
421 |
|
nstarget = 1; |
422 |
|
if (specjitter > 1.5) { /* multiple samples? */ |
423 |
< |
nstarget = specjitter*r->rweight + .5; |
423 |
> |
nstarget = specjitter*np->rp->rweight + .5; |
424 |
|
if (sr.rweight <= minweight*nstarget) |
425 |
|
nstarget = sr.rweight/minweight; |
426 |
|
if (nstarget > 1) { |
456 |
|
for (i = 0; i < 3; i++) |
457 |
|
sr.rdir[i] = np->prdir[i] + |
458 |
|
d*(cosp*np->u[i] + sinp*np->v[i]); |
459 |
< |
if (DOT(sr.rdir, r->ron) >= -FTINY) |
459 |
> |
if (DOT(sr.rdir, np->rp->ron) >= -FTINY) |
460 |
|
continue; |
461 |
|
normalize(sr.rdir); /* OK, normalize */ |
462 |
|
if (nstaken) /* multi-sampling */ |
463 |
|
rayclear(&sr); |
464 |
|
rayvalue(&sr); |
465 |
|
multcolor(sr.rcol, sr.rcoef); |
466 |
< |
addcolor(r->rcol, sr.rcol); |
466 |
> |
addcolor(np->rp->rcol, sr.rcol); |
467 |
|
++nstaken; |
468 |
|
} |
469 |
|
ndims--; |