| 56 |
|
short specfl; /* specularity flags, defined above */ |
| 57 |
|
SCOLOR mcolor; /* color of this material */ |
| 58 |
|
SCOLOR scolor; /* color of specular component */ |
| 59 |
– |
FVECT vrefl; /* vector in direction of reflected ray */ |
| 59 |
|
FVECT prdir; /* vector in transmitted direction */ |
| 60 |
|
double alpha2; /* roughness squared */ |
| 61 |
|
double rdiff, rspec; /* reflected specular, diffuse */ |
| 303 |
|
/* check threshold */ |
| 304 |
|
if (!(nd.specfl & SP_PURE) && specthresh >= nd.rspec-FTINY) |
| 305 |
|
nd.specfl |= SP_RBLT; |
| 307 |
– |
/* compute reflected ray */ |
| 308 |
– |
VSUM(nd.vrefl, r->rdir, nd.pnorm, 2.*nd.pdot); |
| 309 |
– |
/* penetration? */ |
| 310 |
– |
if (hastexture && DOT(nd.vrefl, r->ron) <= FTINY) |
| 311 |
– |
VSUM(nd.vrefl, r->rdir, r->ron, 2.*r->rod); |
| 312 |
– |
checknorm(nd.vrefl); |
| 306 |
|
} |
| 307 |
|
/* reflected ray */ |
| 308 |
|
if ((nd.specfl&(SP_REFL|SP_PURE|SP_RBLT)) == (SP_REFL|SP_PURE)) { |
| 309 |
|
RAY lr; |
| 310 |
|
if (rayorigin(&lr, REFLECTED, r, nd.scolor) == 0) { |
| 311 |
< |
VCOPY(lr.rdir, nd.vrefl); |
| 311 |
> |
/* compute reflected ray */ |
| 312 |
> |
VSUM(lr.rdir, r->rdir, nd.pnorm, 2.*nd.pdot); |
| 313 |
> |
/* penetration? */ |
| 314 |
> |
if (hastexture && DOT(lr.rdir, r->ron) <= FTINY) |
| 315 |
> |
VSUM(lr.rdir, r->rdir, r->ron, 2.*r->rod); |
| 316 |
> |
checknorm(lr.rdir); |
| 317 |
|
rayvalue(&lr); |
| 318 |
|
smultscolor(lr.rcol, lr.rcoef); |
| 319 |
|
copyscolor(r->mcol, lr.rcol); |
| 336 |
|
scalescolor(sctmp, nd.rdiff); |
| 337 |
|
if (nd.specfl & SP_RBLT) /* add in specular as well? */ |
| 338 |
|
saddscolor(sctmp, nd.scolor); |
| 339 |
< |
multambient(sctmp, r, hastexture ? nd.pnorm : r->ron); |
| 339 |
> |
multambient(sctmp, r, nd.pnorm); |
| 340 |
|
saddscolor(r->rcol, sctmp); /* add to returned color */ |
| 341 |
|
} |
| 342 |
|
if (nd.tdiff > FTINY) { /* ambient from other side */ |
| 343 |
+ |
FVECT bnorm; |
| 344 |
|
copyscolor(sctmp, nd.mcolor); /* modified by color */ |
| 345 |
|
if (nd.specfl & SP_TBLT) { |
| 346 |
|
scalescolor(sctmp, nd.trans); |
| 347 |
|
} else { |
| 348 |
|
scalescolor(sctmp, nd.tdiff); |
| 349 |
|
} |
| 350 |
< |
flipsurface(r); |
| 351 |
< |
if (hastexture) { |
| 352 |
< |
FVECT bnorm; |
| 353 |
< |
bnorm[0] = -nd.pnorm[0]; |
| 355 |
< |
bnorm[1] = -nd.pnorm[1]; |
| 356 |
< |
bnorm[2] = -nd.pnorm[2]; |
| 357 |
< |
multambient(sctmp, r, bnorm); |
| 358 |
< |
} else |
| 359 |
< |
multambient(sctmp, r, r->ron); |
| 350 |
> |
bnorm[0] = -nd.pnorm[0]; |
| 351 |
> |
bnorm[1] = -nd.pnorm[1]; |
| 352 |
> |
bnorm[2] = -nd.pnorm[2]; |
| 353 |
> |
multambient(sctmp, r, bnorm); |
| 354 |
|
saddscolor(r->rcol, sctmp); |
| 361 |
– |
flipsurface(r); |
| 355 |
|
} |
| 356 |
|
/* add direct component */ |
| 357 |
|
direct(r, dirnorm, &nd); |
| 381 |
|
fcross(v, np->pnorm, u); |
| 382 |
|
/* compute reflection */ |
| 383 |
|
if ((np->specfl & (SP_REFL|SP_RBLT)) == SP_REFL && |
| 384 |
< |
rayorigin(&sr, SPECULAR, np->rp, np->scolor) == 0) { |
| 384 |
> |
rayorigin(&sr, RSPECULAR, np->rp, np->scolor) == 0) { |
| 385 |
|
nstarget = 1; |
| 386 |
|
if (specjitter > 1.5) { /* multiple samples? */ |
| 387 |
|
nstarget = specjitter*np->rp->rweight + .5; |
| 446 |
|
copyscolor(sr.rcoef, np->mcolor); /* modified by color */ |
| 447 |
|
scalescolor(sr.rcoef, np->tspec); |
| 448 |
|
if ((np->specfl & (SP_TRAN|SP_TBLT)) == SP_TRAN && |
| 449 |
< |
rayorigin(&sr, SPECULAR, np->rp, sr.rcoef) == 0) { |
| 449 |
> |
rayorigin(&sr, TSPECULAR, np->rp, sr.rcoef) == 0) { |
| 450 |
|
nstarget = 1; |
| 451 |
|
if (specjitter > 1.5) { /* multiple samples? */ |
| 452 |
|
nstarget = specjitter*np->rp->rweight + .5; |
