| 46 |
|
findmaterial(register OBJREC *o) |
| 47 |
|
{ |
| 48 |
|
while (!ismaterial(o->otype)) { |
| 49 |
– |
if (ismixture(o->otype)) |
| 50 |
– |
return(NULL); /* reject mixed materials */ |
| 49 |
|
if (o->otype == MOD_ALIAS && o->oargs.nsargs) { |
| 50 |
|
OBJECT aobj; |
| 51 |
|
OBJREC *ao; |
| 60 |
|
return(NULL); |
| 61 |
|
o = objptr(o->omod); |
| 62 |
|
} |
| 63 |
< |
return(o); |
| 63 |
> |
return(o); /* mixtures will return NULL */ |
| 64 |
|
} |
| 65 |
|
|
| 66 |
|
|
| 123 |
|
} |
| 124 |
|
} |
| 125 |
|
#if SHADCACHE |
| 126 |
< |
source[ns].obscache = NULL; |
| 126 |
> |
initobscache(ns); |
| 127 |
|
#endif |
| 128 |
|
if (!(source[ns].sflags & SSKIP)) |
| 129 |
|
foundsource++; |
| 248 |
|
} |
| 249 |
|
|
| 250 |
|
|
| 251 |
+ |
static int |
| 252 |
+ |
transillum( /* check if material is transparent illum */ |
| 253 |
+ |
OBJECT obj |
| 254 |
+ |
) |
| 255 |
+ |
{ |
| 256 |
+ |
OBJREC *m = findmaterial(objptr(obj)); |
| 257 |
+ |
|
| 258 |
+ |
if (m == NULL) |
| 259 |
+ |
return(1); |
| 260 |
+ |
if (m->otype != MAT_ILLUM) |
| 261 |
+ |
return(0); |
| 262 |
+ |
return(!m->oargs.nsargs || !strcmp(m->oargs.sarg[0], VOIDID)); |
| 263 |
+ |
} |
| 264 |
+ |
|
| 265 |
+ |
|
| 266 |
|
extern int |
| 267 |
|
sourcehit( /* check to see if ray hit distant source */ |
| 268 |
|
register RAY *r |
| 269 |
|
) |
| 270 |
|
{ |
| 271 |
+ |
int glowsrc = -1; |
| 272 |
+ |
int transrc = -1; |
| 273 |
|
int first, last; |
| 274 |
|
register int i; |
| 275 |
|
|
| 278 |
|
} else { /* otherwise check all */ |
| 279 |
|
first = 0; last = nsources-1; |
| 280 |
|
} |
| 281 |
< |
for (i = first; i <= last; i++) |
| 282 |
< |
if ((source[i].sflags & (SDISTANT|SVIRTUAL)) == SDISTANT) |
| 283 |
< |
/* |
| 284 |
< |
* Check to see if ray is within |
| 285 |
< |
* solid angle of source. |
| 286 |
< |
*/ |
| 287 |
< |
if (2.0*PI * (1.0 - DOT(source[i].sloc,r->rdir)) |
| 288 |
< |
<= source[i].ss2) { |
| 289 |
< |
r->ro = source[i].so; |
| 290 |
< |
if (!(source[i].sflags & SSKIP)) |
| 291 |
< |
break; |
| 292 |
< |
} |
| 293 |
< |
|
| 294 |
< |
if (r->ro != NULL) { |
| 295 |
< |
r->robj = objndx(r->ro); |
| 296 |
< |
for (i = 0; i < 3; i++) |
| 297 |
< |
r->ron[i] = -r->rdir[i]; |
| 298 |
< |
r->rod = 1.0; |
| 299 |
< |
r->pert[0] = r->pert[1] = r->pert[2] = 0.0; |
| 300 |
< |
r->uv[0] = r->uv[1] = 0.0; |
| 301 |
< |
r->rox = NULL; |
| 302 |
< |
return(1); |
| 281 |
> |
for (i = first; i <= last; i++) { |
| 282 |
> |
if ((source[i].sflags & (SDISTANT|SVIRTUAL)) != SDISTANT) |
| 283 |
> |
continue; |
| 284 |
> |
/* |
| 285 |
> |
* Check to see if ray is within |
| 286 |
> |
* solid angle of source. |
| 287 |
> |
*/ |
| 288 |
> |
if (2.*PI*(1. - DOT(source[i].sloc,r->rdir)) > source[i].ss2) |
| 289 |
> |
continue; |
| 290 |
> |
/* is it the only possibility? */ |
| 291 |
> |
if (first == last) { |
| 292 |
> |
r->ro = source[i].so; |
| 293 |
> |
break; |
| 294 |
> |
} |
| 295 |
> |
/* |
| 296 |
> |
* If it's a glow or transparent illum, just remember it. |
| 297 |
> |
*/ |
| 298 |
> |
if (source[i].sflags & SSKIP) { |
| 299 |
> |
glowsrc = i; |
| 300 |
> |
continue; |
| 301 |
> |
} |
| 302 |
> |
if (transillum(source[i].so->omod)) { |
| 303 |
> |
transrc = i; |
| 304 |
> |
continue; |
| 305 |
> |
} |
| 306 |
> |
r->ro = source[i].so; /* otherwise, use first hit */ |
| 307 |
> |
break; |
| 308 |
|
} |
| 309 |
< |
return(0); |
| 309 |
> |
/* |
| 310 |
> |
* Do we need fallback? |
| 311 |
> |
*/ |
| 312 |
> |
if (r->ro == NULL) { |
| 313 |
> |
if (transrc >= 0 && r->crtype & (AMBIENT|SPECULAR)) |
| 314 |
> |
return(0); /* avoid overcounting */ |
| 315 |
> |
if (glowsrc >= 0) |
| 316 |
> |
r->ro = source[glowsrc].so; |
| 317 |
> |
else |
| 318 |
> |
return(0); /* nothing usable */ |
| 319 |
> |
} |
| 320 |
> |
/* |
| 321 |
> |
* Make assignments. |
| 322 |
> |
*/ |
| 323 |
> |
r->robj = objndx(r->ro); |
| 324 |
> |
for (i = 0; i < 3; i++) |
| 325 |
> |
r->ron[i] = -r->rdir[i]; |
| 326 |
> |
r->rod = 1.0; |
| 327 |
> |
r->pert[0] = r->pert[1] = r->pert[2] = 0.0; |
| 328 |
> |
r->uv[0] = r->uv[1] = 0.0; |
| 329 |
> |
r->rox = NULL; |
| 330 |
> |
return(1); |
| 331 |
|
} |
| 332 |
|
|
| 333 |
|
|
| 594 |
|
static int |
| 595 |
|
weaksrcmat(OBJECT obj) /* identify material */ |
| 596 |
|
{ |
| 597 |
< |
OBJREC *o = findmaterial(objptr(obj)); |
| 597 |
> |
OBJREC *m = findmaterial(objptr(obj)); |
| 598 |
|
|
| 599 |
< |
if (o == NULL) return 0; |
| 600 |
< |
return((o->otype==MAT_ILLUM)|(o->otype==MAT_GLOW)); |
| 599 |
> |
if (m == NULL) return(0); |
| 600 |
> |
return((m->otype==MAT_ILLUM) | (m->otype==MAT_GLOW)); |
| 601 |
|
} |
| 602 |
|
|
| 603 |
|
#define illumblock(m, r) (!(source[r->rsrc].sflags&SVIRTUAL) && \ |
