| 67 |
|
OBJREC *mp; /* material pointer */ |
| 68 |
|
RAY *pr; /* intersected ray */ |
| 69 |
|
DATARRAY *dp; /* data array for PDATA, MDATA or TDATA */ |
| 70 |
< |
COLOR mcolor; /* material (or pattern) color */ |
| 71 |
< |
COLOR rdiff; /* diffuse reflection */ |
| 72 |
< |
COLOR tdiff; /* diffuse transmission */ |
| 70 |
> |
SCOLOR mcolor; /* material (or pattern) color */ |
| 71 |
> |
SCOLOR rdiff; /* diffuse reflection */ |
| 72 |
> |
SCOLOR tdiff; /* diffuse transmission */ |
| 73 |
|
double rspec; /* specular reflectance (1 for BRDTF) */ |
| 74 |
|
double trans; /* transmissivity (.5 for BRDTF) */ |
| 75 |
|
double tspec; /* specular transmittance (1 for BRDTF) */ |
| 83 |
|
|
| 84 |
|
static void |
| 85 |
|
dirbrdf( /* compute source contribution */ |
| 86 |
< |
COLOR cval, /* returned coefficient */ |
| 87 |
< |
void *nnp, /* material data */ |
| 86 |
> |
SCOLOR scval, /* returned coefficient */ |
| 87 |
> |
void *nnp, /* material data */ |
| 88 |
|
FVECT ldir, /* light source direction */ |
| 89 |
|
double omega /* light source size */ |
| 90 |
|
) |
| 92 |
|
BRDFDAT *np = nnp; |
| 93 |
|
double ldot; |
| 94 |
|
double dtmp; |
| 95 |
+ |
SCOLOR sctmp; |
| 96 |
|
COLOR ctmp; |
| 97 |
|
FVECT ldx; |
| 98 |
< |
static double vldx[5], pt[MAXDIM]; |
| 98 |
> |
static double vldx[5], pt[MAXDDIM]; |
| 99 |
|
char **sa; |
| 100 |
|
int i; |
| 101 |
|
#define lddx (vldx+1) |
| 102 |
|
|
| 103 |
< |
setcolor(cval, 0.0, 0.0, 0.0); |
| 103 |
> |
scolorblack(scval); |
| 104 |
|
|
| 105 |
|
ldot = DOT(np->pnorm, ldir); |
| 106 |
|
|
| 116 |
|
* color. The diffuse reflected component will always be |
| 117 |
|
* modified by the color of the material. |
| 118 |
|
*/ |
| 119 |
< |
copycolor(ctmp, np->rdiff); |
| 119 |
> |
copyscolor(sctmp, np->rdiff); |
| 120 |
|
dtmp = ldot * omega / PI; |
| 121 |
< |
scalecolor(ctmp, dtmp); |
| 122 |
< |
addcolor(cval, ctmp); |
| 121 |
> |
scalescolor(sctmp, dtmp); |
| 122 |
> |
saddscolor(scval, sctmp); |
| 123 |
|
} else { |
| 124 |
|
/* |
| 125 |
|
* Diffuse transmitted component. |
| 126 |
|
*/ |
| 127 |
< |
copycolor(ctmp, np->tdiff); |
| 127 |
> |
copyscolor(sctmp, np->tdiff); |
| 128 |
|
dtmp = -ldot * omega / PI; |
| 129 |
< |
scalecolor(ctmp, dtmp); |
| 130 |
< |
addcolor(cval, ctmp); |
| 129 |
> |
scalescolor(sctmp, dtmp); |
| 130 |
> |
saddscolor(scval, sctmp); |
| 131 |
|
} |
| 132 |
|
if ((ldot > 0.0 ? np->rspec <= FTINY : np->tspec <= FTINY) || |
| 133 |
|
ambRayInPmap(np->pr)) |
| 178 |
|
} |
| 179 |
|
if (dtmp <= FTINY) |
| 180 |
|
return; |
| 181 |
+ |
setscolor(sctmp, colval(ctmp,RED), colval(ctmp,GRN), colval(ctmp,BLU)); |
| 182 |
|
if (ldot > 0.0) { |
| 183 |
|
/* |
| 184 |
|
* Compute reflected non-diffuse component. |
| 185 |
|
*/ |
| 186 |
|
if ((np->mp->otype == MAT_MFUNC) | (np->mp->otype == MAT_MDATA)) |
| 187 |
< |
multcolor(ctmp, np->mcolor); |
| 187 |
> |
smultscolor(sctmp, np->mcolor); |
| 188 |
|
dtmp = ldot * omega * np->rspec; |
| 189 |
< |
scalecolor(ctmp, dtmp); |
| 190 |
< |
addcolor(cval, ctmp); |
| 189 |
> |
scalescolor(sctmp, dtmp); |
| 190 |
> |
saddscolor(scval, sctmp); |
| 191 |
|
} else { |
| 192 |
|
/* |
| 193 |
|
* Compute transmitted non-diffuse component. |
| 194 |
|
*/ |
| 195 |
|
if ((np->mp->otype == MAT_TFUNC) | (np->mp->otype == MAT_TDATA)) |
| 196 |
< |
multcolor(ctmp, np->mcolor); |
| 196 |
> |
smultscolor(sctmp, np->mcolor); |
| 197 |
|
dtmp = -ldot * omega * np->tspec; |
| 198 |
< |
scalecolor(ctmp, dtmp); |
| 199 |
< |
addcolor(cval, ctmp); |
| 198 |
> |
scalescolor(sctmp, dtmp); |
| 199 |
> |
saddscolor(scval, sctmp); |
| 200 |
|
} |
| 201 |
|
#undef lddx |
| 202 |
|
} |
| 208 |
|
RAY *r |
| 209 |
|
) |
| 210 |
|
{ |
| 209 |
– |
int hitfront = 1; |
| 211 |
|
BRDFDAT nd; |
| 212 |
|
RAY sr; |
| 212 |
– |
double mirtest=0, mirdist=0; |
| 213 |
– |
double transtest=0, transdist=0; |
| 213 |
|
int hasrefl, hastrans; |
| 214 |
|
int hastexture; |
| 215 |
< |
COLOR ctmp; |
| 215 |
> |
SCOLOR sctmp; |
| 216 |
|
FVECT vtmp; |
| 217 |
|
double d; |
| 218 |
|
MFUNC *mf; |
| 227 |
|
nd.trans = 0.5; |
| 228 |
|
/* diffuse reflectance */ |
| 229 |
|
if (r->rod > 0.0) |
| 230 |
< |
setcolor(nd.rdiff, m->oargs.farg[0], |
| 230 |
> |
setscolor(nd.rdiff, m->oargs.farg[0], |
| 231 |
|
m->oargs.farg[1], |
| 232 |
|
m->oargs.farg[2]); |
| 233 |
|
else |
| 234 |
< |
setcolor(nd.rdiff, m->oargs.farg[3], |
| 234 |
> |
setscolor(nd.rdiff, m->oargs.farg[3], |
| 235 |
|
m->oargs.farg[4], |
| 236 |
|
m->oargs.farg[5]); |
| 237 |
|
/* diffuse transmittance */ |
| 238 |
< |
setcolor(nd.tdiff, m->oargs.farg[6], |
| 238 |
> |
setscolor(nd.tdiff, m->oargs.farg[6], |
| 239 |
|
m->oargs.farg[7], |
| 240 |
|
m->oargs.farg[8]); |
| 241 |
|
/* get modifiers */ |
| 242 |
|
raytexture(r, m->omod); |
| 243 |
< |
hastexture = DOT(r->pert,r->pert) > FTINY*FTINY; |
| 243 |
> |
hastexture = (DOT(r->pert,r->pert) > FTINY*FTINY); |
| 244 |
|
if (hastexture) { /* perturb normal */ |
| 245 |
|
nd.pdot = raynormal(nd.pnorm, r); |
| 246 |
|
} else { |
| 253 |
|
nd.pnorm[i] = -nd.pnorm[i]; |
| 254 |
|
r->pert[i] = -r->pert[i]; |
| 255 |
|
} |
| 257 |
– |
hitfront = 0; |
| 256 |
|
} |
| 257 |
< |
copycolor(nd.mcolor, r->pcol); /* get pattern color */ |
| 258 |
< |
multcolor(nd.rdiff, nd.mcolor); /* modify diffuse values */ |
| 259 |
< |
multcolor(nd.tdiff, nd.mcolor); |
| 260 |
< |
hasrefl = bright(nd.rdiff) > FTINY; |
| 261 |
< |
hastrans = bright(nd.tdiff) > FTINY; |
| 257 |
> |
copyscolor(nd.mcolor, r->pcol); /* get pattern color */ |
| 258 |
> |
smultscolor(nd.rdiff, nd.mcolor); /* modify diffuse values */ |
| 259 |
> |
smultscolor(nd.tdiff, nd.mcolor); |
| 260 |
> |
hasrefl = (sintens(nd.rdiff) > FTINY); |
| 261 |
> |
hastrans = (sintens(nd.tdiff) > FTINY); |
| 262 |
|
/* load cal file */ |
| 263 |
|
nd.dp = NULL; |
| 264 |
< |
mf = getfunc(m, 9, 0x3f, 0); |
| 264 |
> |
mf = getfunc(m, 9, 0x3F, 0); |
| 265 |
|
/* compute transmitted ray */ |
| 266 |
|
setbrdfunc(&nd); |
| 267 |
|
errno = 0; |
| 268 |
< |
setcolor(ctmp, evalue(mf->ep[3]), |
| 268 |
> |
setscolor(sctmp, evalue(mf->ep[3]), |
| 269 |
|
evalue(mf->ep[4]), |
| 270 |
|
evalue(mf->ep[5])); |
| 271 |
|
if ((errno == EDOM) | (errno == ERANGE)) |
| 272 |
|
objerror(m, WARNING, "compute error"); |
| 273 |
< |
else if (rayorigin(&sr, TRANS, r, ctmp) == 0) { |
| 274 |
< |
if (!(r->crtype & SHADOW) && hastexture) { |
| 273 |
> |
else if (rayorigin(&sr, TRANS, r, sctmp) == 0) { |
| 274 |
> |
if (hastexture && !(r->crtype & (SHADOW|AMBIENT))) { |
| 275 |
|
/* perturb direction */ |
| 276 |
< |
VSUM(sr.rdir, r->rdir, r->pert, -.75); |
| 276 |
> |
VSUB(sr.rdir, r->rdir, r->pert); |
| 277 |
|
if (normalize(sr.rdir) == 0.0) { |
| 278 |
|
objerror(m, WARNING, "illegal perturbation"); |
| 279 |
|
VCOPY(sr.rdir, r->rdir); |
| 282 |
|
VCOPY(sr.rdir, r->rdir); |
| 283 |
|
} |
| 284 |
|
rayvalue(&sr); |
| 285 |
< |
multcolor(sr.rcol, sr.rcoef); |
| 286 |
< |
addcolor(r->rcol, sr.rcol); |
| 287 |
< |
if (!hastexture) { |
| 288 |
< |
transtest = 2.0*bright(sr.rcol); |
| 289 |
< |
transdist = r->rot + sr.rt; |
| 292 |
< |
} |
| 285 |
> |
smultscolor(sr.rcol, sr.rcoef); |
| 286 |
> |
saddscolor(r->rcol, sr.rcol); |
| 287 |
> |
if ((!hastexture || r->crtype & (SHADOW|AMBIENT)) && |
| 288 |
> |
nd.tspec > pbright(nd.tdiff) + pbright(nd.rdiff)) |
| 289 |
> |
r->rxt = r->rot + raydistance(&sr); |
| 290 |
|
} |
| 291 |
|
if (r->crtype & SHADOW) /* the rest is shadow */ |
| 292 |
|
return(1); |
| 293 |
+ |
|
| 294 |
|
/* compute reflected ray */ |
| 295 |
|
setbrdfunc(&nd); |
| 296 |
|
errno = 0; |
| 297 |
< |
setcolor(ctmp, evalue(mf->ep[0]), |
| 297 |
> |
setscolor(sctmp, evalue(mf->ep[0]), |
| 298 |
|
evalue(mf->ep[1]), |
| 299 |
|
evalue(mf->ep[2])); |
| 300 |
|
if ((errno == EDOM) | (errno == ERANGE)) |
| 301 |
|
objerror(m, WARNING, "compute error"); |
| 302 |
< |
else if (rayorigin(&sr, REFLECTED, r, ctmp) == 0) { |
| 302 |
> |
else if (rayorigin(&sr, REFLECTED, r, sctmp) == 0) { |
| 303 |
|
VSUM(sr.rdir, r->rdir, nd.pnorm, 2.*nd.pdot); |
| 304 |
|
checknorm(sr.rdir); |
| 305 |
|
rayvalue(&sr); |
| 306 |
< |
multcolor(sr.rcol, sr.rcoef); |
| 307 |
< |
addcolor(r->rcol, sr.rcol); |
| 308 |
< |
if (!hastexture && r->ro != NULL && isflat(r->ro->otype)) { |
| 309 |
< |
mirtest = 2.0*bright(sr.rcol); |
| 310 |
< |
mirdist = r->rot + sr.rt; |
| 311 |
< |
} |
| 306 |
> |
smultscolor(sr.rcol, sr.rcoef); |
| 307 |
> |
copyscolor(r->mcol, sr.rcol); |
| 308 |
> |
saddscolor(r->rcol, sr.rcol); |
| 309 |
> |
r->rmt = r->rot; |
| 310 |
> |
if (r->ro != NULL && isflat(r->ro->otype) && |
| 311 |
> |
!hastexture | (r->crtype & AMBIENT)) |
| 312 |
> |
r->rmt += raydistance(&sr); |
| 313 |
|
} |
| 314 |
|
/* compute ambient */ |
| 315 |
|
if (hasrefl) { |
| 316 |
< |
if (!hitfront) |
| 317 |
< |
flipsurface(r); |
| 318 |
< |
copycolor(ctmp, nd.rdiff); |
| 320 |
< |
multambient(ctmp, r, nd.pnorm); |
| 321 |
< |
addcolor(r->rcol, ctmp); /* add to returned color */ |
| 322 |
< |
if (!hitfront) |
| 323 |
< |
flipsurface(r); |
| 316 |
> |
copyscolor(sctmp, nd.rdiff); |
| 317 |
> |
multambient(sctmp, r, nd.pnorm); |
| 318 |
> |
saddscolor(r->rcol, sctmp); /* add to returned color */ |
| 319 |
|
} |
| 320 |
|
if (hastrans) { /* from other side */ |
| 326 |
– |
if (hitfront) |
| 327 |
– |
flipsurface(r); |
| 321 |
|
vtmp[0] = -nd.pnorm[0]; |
| 322 |
|
vtmp[1] = -nd.pnorm[1]; |
| 323 |
|
vtmp[2] = -nd.pnorm[2]; |
| 324 |
< |
copycolor(ctmp, nd.tdiff); |
| 325 |
< |
multambient(ctmp, r, vtmp); |
| 326 |
< |
addcolor(r->rcol, ctmp); |
| 334 |
< |
if (hitfront) |
| 335 |
< |
flipsurface(r); |
| 324 |
> |
copyscolor(sctmp, nd.tdiff); |
| 325 |
> |
multambient(sctmp, r, vtmp); |
| 326 |
> |
saddscolor(r->rcol, sctmp); |
| 327 |
|
} |
| 328 |
|
if (hasrefl | hastrans || m->oargs.sarg[6][0] != '0') |
| 329 |
|
direct(r, dirbrdf, &nd); /* add direct component */ |
| 330 |
|
|
| 340 |
– |
d = bright(r->rcol); /* set effective distance */ |
| 341 |
– |
if (transtest > d) |
| 342 |
– |
r->rt = transdist; |
| 343 |
– |
else if (mirtest > d) |
| 344 |
– |
r->rt = mirdist; |
| 345 |
– |
|
| 331 |
|
return(1); |
| 332 |
|
} |
| 333 |
|
|
| 340 |
|
) |
| 341 |
|
{ |
| 342 |
|
BRDFDAT nd; |
| 343 |
< |
COLOR ctmp; |
| 343 |
> |
SCOLOR sctmp; |
| 344 |
|
FVECT vtmp; |
| 345 |
|
double dtmp; |
| 346 |
|
/* always a shadow */ |
| 347 |
|
if (r->crtype & SHADOW) |
| 348 |
|
return(1); |
| 364 |
– |
/* check arguments */ |
| 365 |
– |
if ((m->oargs.nsargs < (hasdata(m->otype)?4:2)) | (m->oargs.nfargs < |
| 366 |
– |
((m->otype==MAT_TFUNC)|(m->otype==MAT_TDATA)?6:4))) |
| 367 |
– |
objerror(m, USER, "bad # arguments"); |
| 349 |
|
/* check for back side */ |
| 350 |
|
if (r->rod < 0.0) { |
| 351 |
|
if (!backvis) { |
| 356 |
|
flipsurface(r); /* reorient if backvis */ |
| 357 |
|
} else |
| 358 |
|
raytexture(r, m->omod); |
| 359 |
+ |
/* check arguments */ |
| 360 |
+ |
if ((m->oargs.nsargs < (hasdata(m->otype)?4:2)) | (m->oargs.nfargs < |
| 361 |
+ |
((m->otype==MAT_TFUNC)|(m->otype==MAT_TDATA)?6:4))) |
| 362 |
+ |
objerror(m, USER, "bad # arguments"); |
| 363 |
|
|
| 364 |
|
nd.mp = m; |
| 365 |
|
nd.pr = r; |
| 366 |
|
/* get material color */ |
| 367 |
< |
setcolor(nd.mcolor, m->oargs.farg[0], |
| 367 |
> |
setscolor(nd.mcolor, m->oargs.farg[0], |
| 368 |
|
m->oargs.farg[1], |
| 369 |
|
m->oargs.farg[2]); |
| 370 |
|
/* get specular component */ |
| 374 |
|
nd.trans = m->oargs.farg[4]*(1.0 - nd.rspec); |
| 375 |
|
nd.tspec = nd.trans * m->oargs.farg[5]; |
| 376 |
|
dtmp = nd.trans - nd.tspec; |
| 377 |
< |
setcolor(nd.tdiff, dtmp, dtmp, dtmp); |
| 377 |
> |
setscolor(nd.tdiff, dtmp, dtmp, dtmp); |
| 378 |
|
} else { |
| 379 |
|
nd.tspec = nd.trans = 0.0; |
| 380 |
< |
setcolor(nd.tdiff, 0.0, 0.0, 0.0); |
| 380 |
> |
scolorblack(nd.tdiff); |
| 381 |
|
} |
| 382 |
|
/* compute reflectance */ |
| 383 |
|
dtmp = 1.0 - nd.trans - nd.rspec; |
| 384 |
< |
setcolor(nd.rdiff, dtmp, dtmp, dtmp); |
| 384 |
> |
setscolor(nd.rdiff, dtmp, dtmp, dtmp); |
| 385 |
|
nd.pdot = raynormal(nd.pnorm, r); /* perturb normal */ |
| 386 |
< |
multcolor(nd.mcolor, r->pcol); /* modify material color */ |
| 387 |
< |
multcolor(nd.rdiff, nd.mcolor); |
| 388 |
< |
multcolor(nd.tdiff, nd.mcolor); |
| 386 |
> |
smultscolor(nd.mcolor, r->pcol); /* modify material color */ |
| 387 |
> |
smultscolor(nd.rdiff, nd.mcolor); |
| 388 |
> |
smultscolor(nd.tdiff, nd.mcolor); |
| 389 |
|
/* load auxiliary files */ |
| 390 |
|
if (hasdata(m->otype)) { |
| 391 |
|
nd.dp = getdata(m->oargs.sarg[1]); |
| 396 |
|
} |
| 397 |
|
/* compute ambient */ |
| 398 |
|
if (nd.trans < 1.0-FTINY) { |
| 399 |
< |
copycolor(ctmp, nd.mcolor); /* modified by material color */ |
| 400 |
< |
scalecolor(ctmp, 1.0-nd.trans); |
| 401 |
< |
multambient(ctmp, r, nd.pnorm); |
| 402 |
< |
addcolor(r->rcol, ctmp); /* add to returned color */ |
| 399 |
> |
copyscolor(sctmp, nd.mcolor); /* modified by material color */ |
| 400 |
> |
scalescolor(sctmp, 1.0-nd.trans); |
| 401 |
> |
multambient(sctmp, r, nd.pnorm); |
| 402 |
> |
saddscolor(r->rcol, sctmp); /* add to returned color */ |
| 403 |
|
} |
| 404 |
< |
if (nd.trans > FTINY) { /* from other side */ |
| 420 |
< |
flipsurface(r); |
| 404 |
> |
if (nd.trans > FTINY) { /* from other side */ |
| 405 |
|
vtmp[0] = -nd.pnorm[0]; |
| 406 |
|
vtmp[1] = -nd.pnorm[1]; |
| 407 |
|
vtmp[2] = -nd.pnorm[2]; |
| 408 |
< |
copycolor(ctmp, nd.mcolor); |
| 409 |
< |
scalecolor(ctmp, nd.trans); |
| 410 |
< |
multambient(ctmp, r, vtmp); |
| 411 |
< |
addcolor(r->rcol, ctmp); |
| 428 |
< |
flipsurface(r); |
| 408 |
> |
copyscolor(sctmp, nd.mcolor); |
| 409 |
> |
scalescolor(sctmp, nd.trans); |
| 410 |
> |
multambient(sctmp, r, vtmp); |
| 411 |
> |
saddscolor(r->rcol, sctmp); |
| 412 |
|
} |
| 413 |
|
/* add direct component */ |
| 414 |
|
direct(r, dirbrdf, &nd); |
| 423 |
|
) |
| 424 |
|
{ |
| 425 |
|
FVECT vec; |
| 426 |
+ |
COLOR ctmp; |
| 427 |
|
|
| 428 |
|
if (setfunc(np->mp, np->pr) == 0) |
| 429 |
|
return(0); /* it's OK, setfunc says we're done */ |
| 430 |
|
/* else (re)assign special variables */ |
| 431 |
|
multv3(vec, np->pnorm, funcxf.xfm); |
| 432 |
< |
varset("NxP", '=', vec[0]/funcxf.sca); |
| 433 |
< |
varset("NyP", '=', vec[1]/funcxf.sca); |
| 434 |
< |
varset("NzP", '=', vec[2]/funcxf.sca); |
| 435 |
< |
varset("RdotP", '=', np->pdot <= -1.0 ? -1.0 : |
| 432 |
> |
varset("NxP`", '=', vec[0]/funcxf.sca); |
| 433 |
> |
varset("NyP`", '=', vec[1]/funcxf.sca); |
| 434 |
> |
varset("NzP`", '=', vec[2]/funcxf.sca); |
| 435 |
> |
varset("RdotP`", '=', np->pdot <= -1.0 ? -1.0 : |
| 436 |
|
np->pdot >= 1.0 ? 1.0 : np->pdot); |
| 437 |
< |
varset("CrP", '=', colval(np->mcolor,RED)); |
| 438 |
< |
varset("CgP", '=', colval(np->mcolor,GRN)); |
| 439 |
< |
varset("CbP", '=', colval(np->mcolor,BLU)); |
| 437 |
> |
scolor_color(ctmp, np->mcolor); /* should use scolor_rgb()? */ |
| 438 |
> |
varset("CrP", '=', colval(ctmp,RED)); |
| 439 |
> |
varset("CgP", '=', colval(ctmp,GRN)); |
| 440 |
> |
varset("CbP", '=', colval(ctmp,BLU)); |
| 441 |
|
return(1); |
| 442 |
|
} |
