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#include "otypes.h" |
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+ |
#include "func.h" |
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+ |
|
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/* |
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* Arguments to this material include the color and specularity. |
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* String arguments include the reflection function and files. |
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* CrP, CgP, CbP - perturbed material color |
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*/ |
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|
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extern double funvalue(), varvalue(); |
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extern XF funcxf; |
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|
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typedef struct { |
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OBJREC *mp; /* material pointer */ |
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RAY *pr; /* intersected ray */ |
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dtmp = funvalue(sa[0], 1, &dtmp); |
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setcolor(ctmp, dtmp, dtmp, dtmp); |
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} |
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< |
if (errno) |
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< |
goto computerr; |
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> |
if (errno) { |
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> |
objerror(np->mp, WARNING, "compute error"); |
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> |
return; |
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> |
} |
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if (dtmp <= FTINY) |
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return; |
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if (ldot > 0.0) { |
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scalecolor(ctmp, dtmp); |
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addcolor(cval, ctmp); |
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} |
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return; |
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computerr: |
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objerror(np->mp, WARNING, "compute error"); |
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return; |
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} |
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|
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|
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BRDFDAT nd; |
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double transtest, transdist; |
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COLOR ctmp; |
| 191 |
< |
double dtmp; |
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> |
double dtmp, tspect, rspecr; |
| 192 |
> |
MFUNC *mf; |
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register int i; |
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/* check arguments */ |
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switch (m->otype) { |
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multcolor(nd.mcolor, r->pcol); /* modify material color */ |
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transtest = 0; |
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/* load auxiliary files */ |
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< |
if (m->otype == MAT_PDATA || m->otype == MAT_MDATA |
| 242 |
< |
|| m->otype == MAT_TDATA) { |
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> |
if (hasdata(m->otype)) { |
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nd.dp = getdata(m->oargs.sarg[1]); |
| 241 |
< |
for (i = 3; i < m->oargs.nsargs; i++) |
| 242 |
< |
if (m->oargs.sarg[i][0] == '-') |
| 246 |
< |
break; |
| 247 |
< |
if (i-3 != nd.dp->nd) |
| 248 |
< |
objerror(m, USER, "dimension error"); |
| 249 |
< |
if (!fundefined(m->oargs.sarg[3])) |
| 250 |
< |
loadfunc(m->oargs.sarg[2]); |
| 241 |
> |
i = (1 << nd.dp->nd) - 1; |
| 242 |
> |
mf = getfunc(m, 2, i<<3, 0); |
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} else if (m->otype == MAT_BRTDF) { |
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nd.dp = NULL; |
| 245 |
< |
if (!fundefined(m->oargs.sarg[7])) |
| 254 |
< |
loadfunc(m->oargs.sarg[9]); |
| 245 |
> |
mf = getfunc(m, 9, 0x3f, 0); |
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} else { |
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nd.dp = NULL; |
| 248 |
< |
if (!fundefined(m->oargs.sarg[0])) |
| 258 |
< |
loadfunc(m->oargs.sarg[1]); |
| 248 |
> |
mf = getfunc(m, 1, 0, 0); |
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} |
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/* set special variables */ |
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setbrdfunc(&nd); |
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/* compute transmitted ray */ |
| 253 |
+ |
tspect = 0.; |
| 254 |
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if (m->otype == MAT_BRTDF && nd.tspec > FTINY) { |
| 255 |
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RAY sr; |
| 256 |
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errno = 0; |
| 257 |
< |
setcolor(ctmp, varvalue(m->oargs.sarg[3]), |
| 258 |
< |
varvalue(m->oargs.sarg[4]), |
| 259 |
< |
varvalue(m->oargs.sarg[5])); |
| 260 |
< |
scalecolor(ctmp, nd.tspec); |
| 257 |
> |
setcolor(ctmp, evalue(mf->ep[3]), |
| 258 |
> |
evalue(mf->ep[4]), |
| 259 |
> |
evalue(mf->ep[5])); |
| 260 |
> |
scalecolor(ctmp, nd.trans); |
| 261 |
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if (errno) |
| 262 |
|
objerror(m, WARNING, "compute error"); |
| 263 |
< |
else if ((dtmp = bright(ctmp)) > FTINY && |
| 264 |
< |
rayorigin(&sr, r, TRANS, dtmp) == 0) { |
| 265 |
< |
if (DOT(r->pert,r->pert) > FTINY*FTINY) { |
| 263 |
> |
else if ((tspect = bright(ctmp)) > FTINY && |
| 264 |
> |
rayorigin(&sr, r, TRANS, tspect) == 0) { |
| 265 |
> |
if (!(r->crtype & SHADOW) && |
| 266 |
> |
DOT(r->pert,r->pert) > FTINY*FTINY) { |
| 267 |
|
for (i = 0; i < 3; i++) /* perturb direction */ |
| 268 |
|
sr.rdir[i] = r->rdir[i] - |
| 269 |
|
.75*r->pert[i]; |
| 282 |
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if (r->crtype & SHADOW) /* the rest is shadow */ |
| 283 |
|
return; |
| 284 |
|
/* compute reflected ray */ |
| 285 |
+ |
rspecr = 0.; |
| 286 |
|
if (m->otype == MAT_BRTDF && nd.rspec > FTINY) { |
| 287 |
|
RAY sr; |
| 288 |
|
errno = 0; |
| 289 |
< |
setcolor(ctmp, varvalue(m->oargs.sarg[0]), |
| 290 |
< |
varvalue(m->oargs.sarg[1]), |
| 291 |
< |
varvalue(m->oargs.sarg[2])); |
| 299 |
< |
scalecolor(ctmp, nd.rspec); |
| 289 |
> |
setcolor(ctmp, evalue(mf->ep[0]), |
| 290 |
> |
evalue(mf->ep[1]), |
| 291 |
> |
evalue(mf->ep[2])); |
| 292 |
|
if (errno) |
| 293 |
|
objerror(m, WARNING, "compute error"); |
| 294 |
< |
else if ((dtmp = bright(ctmp)) > FTINY && |
| 295 |
< |
rayorigin(&sr, r, REFLECTED, dtmp) == 0) { |
| 294 |
> |
else if ((rspecr = bright(ctmp)) > FTINY && |
| 295 |
> |
rayorigin(&sr, r, REFLECTED, rspecr) == 0) { |
| 296 |
|
for (i = 0; i < 3; i++) |
| 297 |
|
sr.rdir[i] = r->rdir[i] + |
| 298 |
|
2.0*nd.pdot*nd.pnorm[i]; |
| 302 |
|
} |
| 303 |
|
} |
| 304 |
|
/* compute ambient */ |
| 305 |
< |
if (nd.rdiff > FTINY) { |
| 305 |
> |
if ((dtmp = 1.0-nd.trans-rspecr) > FTINY) { |
| 306 |
|
ambient(ctmp, r); |
| 307 |
< |
if (m->otype == MAT_BRTDF) |
| 316 |
< |
scalecolor(ctmp, nd.rdiff); |
| 317 |
< |
else |
| 318 |
< |
scalecolor(ctmp, 1.0-nd.trans); |
| 307 |
> |
scalecolor(ctmp, dtmp); |
| 308 |
|
multcolor(ctmp, nd.mcolor); /* modified by material color */ |
| 309 |
|
addcolor(r->rcol, ctmp); /* add to returned color */ |
| 310 |
|
} |
| 311 |
< |
if (nd.tdiff > FTINY) { /* from other side */ |
| 311 |
> |
if ((dtmp = nd.trans-tspect) > FTINY) { /* from other side */ |
| 312 |
|
flipsurface(r); |
| 313 |
|
ambient(ctmp, r); |
| 314 |
< |
if (m->otype == MAT_BRTDF) |
| 326 |
< |
scalecolor(ctmp, nd.tdiff); |
| 327 |
< |
else |
| 328 |
< |
scalecolor(ctmp, nd.trans); |
| 314 |
> |
scalecolor(ctmp, dtmp); |
| 315 |
|
multcolor(ctmp, nd.mcolor); |
| 316 |
|
addcolor(r->rcol, ctmp); |
| 317 |
|
flipsurface(r); |
