| 16 |
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|
| 17 |
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#include "func.h" |
| 18 |
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|
| 19 |
+ |
extern int backvis; /* back faces visible? */ |
| 20 |
+ |
|
| 21 |
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/* |
| 22 |
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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. |
| 270 |
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transdist = r->rot + sr.rt; |
| 271 |
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} |
| 272 |
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if (r->crtype & SHADOW) /* the rest is shadow */ |
| 273 |
< |
return; |
| 273 |
> |
return(1); |
| 274 |
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/* compute reflected ray */ |
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setbrdfunc(&nd); |
| 276 |
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errno = 0; |
| 310 |
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/* check distance */ |
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if (transtest > bright(r->rcol)) |
| 312 |
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r->rt = transdist; |
| 313 |
+ |
|
| 314 |
+ |
return(1); |
| 315 |
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} |
| 316 |
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|
| 317 |
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|
| 325 |
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double dtmp; |
| 326 |
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/* always a shadow */ |
| 327 |
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if (r->crtype & SHADOW) |
| 328 |
< |
return; |
| 328 |
> |
return(1); |
| 329 |
|
/* check arguments */ |
| 330 |
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if (m->oargs.nsargs < (hasdata(m->otype)?4:2) | m->oargs.nfargs < |
| 331 |
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(m->otype==MAT_TFUNC|m->otype==MAT_TDATA?6:4)) |
| 351 |
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/* compute reflectance */ |
| 352 |
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dtmp = 1.0 - nd.trans - nd.rspec; |
| 353 |
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setcolor(nd.rdiff, dtmp, dtmp, dtmp); |
| 354 |
< |
/* fix orientation */ |
| 355 |
< |
if (r->rod < 0.0) |
| 356 |
< |
flipsurface(r); |
| 354 |
> |
/* check for back side */ |
| 355 |
> |
if (r->rod < 0.0) { |
| 356 |
> |
if (!backvis && m->otype != MAT_TFUNC |
| 357 |
> |
&& m->otype != MAT_TDATA) { |
| 358 |
> |
raytrans(r); |
| 359 |
> |
return(1); |
| 360 |
> |
} |
| 361 |
> |
flipsurface(r); /* reorient if backvis */ |
| 362 |
> |
} |
| 363 |
|
/* get modifiers */ |
| 364 |
|
raytexture(r, m->omod); |
| 365 |
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nd.pdot = raynormal(nd.pnorm, r); /* perturb normal */ |
| 391 |
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} |
| 392 |
|
/* add direct component */ |
| 393 |
|
direct(r, dirbrdf, &nd); |
| 394 |
+ |
|
| 395 |
+ |
return(1); |
| 396 |
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} |
| 397 |
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|
| 398 |
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|
