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#include "func.h" |
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extern int backvis; /* back faces visible? */ |
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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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double dtmp; |
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COLOR ctmp; |
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FVECT ldx; |
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< |
double lddx[3], pt[MAXDIM]; |
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< |
double vldx[4]; |
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> |
static double vldx[5], pt[MAXDIM]; |
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register char **sa; |
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register int i; |
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#define lddx (vldx+1) |
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setcolor(cval, 0.0, 0.0, 0.0); |
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multv3(ldx, ldir, funcxf.xfm); |
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for (i = 0; i < 3; i++) |
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lddx[i] = ldx[i]/funcxf.sca; |
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lddx[3] = omega; |
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/* compute BRTDF */ |
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if (np->mp->otype == MAT_BRTDF) { |
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if (sa[6][0] == '0') /* special case */ |
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colval(ctmp,RED) = 0.0; |
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else |
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< |
colval(ctmp,RED) = funvalue(sa[6], 3, lddx); |
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colval(ctmp,RED) = funvalue(sa[6], 4, lddx); |
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if (!strcmp(sa[7],sa[6])) |
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colval(ctmp,GRN) = colval(ctmp,RED); |
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else |
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colval(ctmp,GRN) = funvalue(sa[7], 3, lddx); |
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colval(ctmp,GRN) = funvalue(sa[7], 4, lddx); |
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if (!strcmp(sa[8],sa[6])) |
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colval(ctmp,BLU) = colval(ctmp,RED); |
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else if (!strcmp(sa[8],sa[7])) |
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colval(ctmp,BLU) = colval(ctmp,GRN); |
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else |
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colval(ctmp,BLU) = funvalue(sa[8], 3, lddx); |
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colval(ctmp,BLU) = funvalue(sa[8], 4, lddx); |
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dtmp = bright(ctmp); |
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} else if (np->dp == NULL) { |
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< |
dtmp = funvalue(sa[0], 3, lddx); |
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> |
dtmp = funvalue(sa[0], 4, lddx); |
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setcolor(ctmp, dtmp, dtmp, dtmp); |
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} else { |
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for (i = 0; i < np->dp->nd; i++) |
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< |
pt[i] = funvalue(sa[3+i], 3, lddx); |
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> |
pt[i] = funvalue(sa[3+i], 4, lddx); |
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vldx[0] = datavalue(np->dp, pt); |
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< |
vldx[1] = lddx[0]; vldx[2] = lddx[1]; vldx[3] = lddx[2]; |
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< |
dtmp = funvalue(sa[0], 4, vldx); |
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> |
dtmp = funvalue(sa[0], 5, vldx); |
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setcolor(ctmp, dtmp, dtmp, dtmp); |
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} |
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if (errno) { |
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scalecolor(ctmp, dtmp); |
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addcolor(cval, ctmp); |
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} |
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+ |
#undef lddx |
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} |
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< |
m_brdf(m, r) /* color a ray which hit a BRDTF material */ |
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> |
m_brdf(m, r) /* color a ray which hit a BRDTfunc material */ |
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register OBJREC *m; |
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register RAY *r; |
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{ |
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if (hasrefl) { |
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if (nd.pdot < 0.0) |
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flipsurface(r); |
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< |
ambient(ctmp, r); |
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> |
ambient(ctmp, r, nd.pnorm); |
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multcolor(ctmp, nd.rdiff); |
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addcolor(r->rcol, ctmp); /* add to returned color */ |
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if (nd.pdot < 0.0) |
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if (hastrans) { /* from other side */ |
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if (nd.pdot > 0.0) |
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flipsurface(r); |
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< |
ambient(ctmp, r); |
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> |
ambient(ctmp, r, nd.pnorm); |
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multcolor(ctmp, nd.tdiff); |
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addcolor(r->rcol, ctmp); |
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if (nd.pdot > 0.0) |
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/* compute reflectance */ |
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dtmp = 1.0 - nd.trans - nd.rspec; |
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setcolor(nd.rdiff, dtmp, dtmp, dtmp); |
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< |
/* fix orientation */ |
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< |
if (r->rod < 0.0) |
| 357 |
< |
flipsurface(r); |
| 355 |
> |
/* check for back side */ |
| 356 |
> |
if (r->rod < 0.0) { |
| 357 |
> |
if (!backvis && m->otype != MAT_TFUNC |
| 358 |
> |
&& m->otype != MAT_TDATA) { |
| 359 |
> |
raytrans(r); |
| 360 |
> |
return(1); |
| 361 |
> |
} |
| 362 |
> |
flipsurface(r); /* reorient if backvis */ |
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> |
} |
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/* get modifiers */ |
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raytexture(r, m->omod); |
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nd.pdot = raynormal(nd.pnorm, r); /* perturb normal */ |
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} |
| 378 |
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/* compute ambient */ |
| 379 |
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if (nd.trans < 1.0-FTINY) { |
| 380 |
< |
ambient(ctmp, r); |
| 380 |
> |
ambient(ctmp, r, nd.pnorm); |
| 381 |
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scalecolor(ctmp, 1.0-nd.trans); |
| 382 |
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multcolor(ctmp, nd.mcolor); /* modified by material color */ |
| 383 |
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addcolor(r->rcol, ctmp); /* add to returned color */ |
| 384 |
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} |
| 385 |
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if (nd.trans > FTINY) { /* from other side */ |
| 386 |
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flipsurface(r); |
| 387 |
< |
ambient(ctmp, r); |
| 387 |
> |
ambient(ctmp, r, nd.pnorm); |
| 388 |
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scalecolor(ctmp, nd.trans); |
| 389 |
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multcolor(ctmp, nd.mcolor); |
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addcolor(r->rcol, ctmp); |
