122 |
|
if (ldot > 0.0 ? np->rspec <= FTINY : np->tspec <= FTINY) |
123 |
|
return; /* no specular component */ |
124 |
|
/* set up function */ |
125 |
< |
setfunc(np->mp, np->pr); |
125 |
> |
setbrdfunc(np); |
126 |
|
sa = np->mp->oargs.sarg; |
127 |
|
errno = 0; |
128 |
|
/* transform light vector */ |
192 |
|
double transtest, transdist; |
193 |
|
COLOR ctmp; |
194 |
|
double dtmp; |
195 |
– |
FVECT vec; |
195 |
|
register int i; |
196 |
|
/* check arguments */ |
197 |
|
switch (m->otype) { |
258 |
|
loadfunc(m->oargs.sarg[1]); |
259 |
|
} |
260 |
|
/* set special variables */ |
261 |
< |
setfunc(m, r); |
263 |
< |
multv3(vec, nd.pnorm, funcxf.xfm); |
264 |
< |
varset("NxP", '=', vec[0]/funcxf.sca); |
265 |
< |
varset("NyP", '=', vec[1]/funcxf.sca); |
266 |
< |
varset("NzP", '=', vec[2]/funcxf.sca); |
267 |
< |
varset("RdotP", '=', nd.pdot); |
268 |
< |
varset("CrP", '=', colval(nd.mcolor,RED)); |
269 |
< |
varset("CgP", '=', colval(nd.mcolor,GRN)); |
270 |
< |
varset("CbP", '=', colval(nd.mcolor,BLU)); |
261 |
> |
setbrdfunc(&nd); |
262 |
|
/* compute transmitted ray */ |
263 |
|
if (m->otype == MAT_BRTDF && nd.tspec > FTINY) { |
264 |
|
RAY sr; |
335 |
|
/* check distance */ |
336 |
|
if (transtest > bright(r->rcol)) |
337 |
|
r->rt = transdist; |
338 |
+ |
} |
339 |
+ |
|
340 |
+ |
|
341 |
+ |
setbrdfunc(np) /* set up brdf function and variables */ |
342 |
+ |
register BRDFDAT *np; |
343 |
+ |
{ |
344 |
+ |
FVECT vec; |
345 |
+ |
|
346 |
+ |
if (setfunc(np->mp, np->pr) == 0) |
347 |
+ |
return(0); /* it's OK, setfunc says we're done */ |
348 |
+ |
/* else (re)assign special variables */ |
349 |
+ |
multv3(vec, np->pnorm, funcxf.xfm); |
350 |
+ |
varset("NxP", '=', vec[0]/funcxf.sca); |
351 |
+ |
varset("NyP", '=', vec[1]/funcxf.sca); |
352 |
+ |
varset("NzP", '=', vec[2]/funcxf.sca); |
353 |
+ |
varset("RdotP", '=', np->pdot); |
354 |
+ |
varset("CrP", '=', colval(np->mcolor,RED)); |
355 |
+ |
varset("CgP", '=', colval(np->mcolor,GRN)); |
356 |
+ |
varset("CbP", '=', colval(np->mcolor,BLU)); |
357 |
+ |
return(1); |
358 |
|
} |