| 1 |
< |
/* Copyright (c) 1992 Regents of the University of California */ |
| 1 |
> |
/* Copyright (c) 1993 Regents of the University of California */ |
| 2 |
|
|
| 3 |
|
#ifndef lint |
| 4 |
|
static char SCCSid[] = "$SunId$ LBL"; |
| 355 |
|
* because they are very nasty and difficult to understand. |
| 356 |
|
*/ |
| 357 |
|
|
| 358 |
< |
/* wrongillum * |
| 358 |
> |
/* illumblock * |
| 359 |
|
* |
| 360 |
|
* We cannot allow an illum to pass to another illum, because that |
| 361 |
|
* would almost certainly constitute overcounting. |
| 362 |
|
* However, we do allow an illum to pass to another illum |
| 363 |
|
* that is actually going to relay to a virtual light source. |
| 364 |
+ |
* We also prevent an illum from passing to a glow; this provides a |
| 365 |
+ |
* convenient mechanism for defining detailed light source |
| 366 |
+ |
* geometry behind (or inside) an effective radiator. |
| 367 |
|
*/ |
| 368 |
|
|
| 369 |
< |
#define wrongillum(m, r) (!(source[r->rsrc].sflags&SVIRTUAL) && \ |
| 370 |
< |
objptr(source[r->rsrc].so->omod)->otype==MAT_ILLUM) |
| 369 |
> |
static int weaksrcmod(obj) int obj; /* efficiency booster function */ |
| 370 |
> |
{register OBJREC *o = objptr(obj); |
| 371 |
> |
return(o->otype==MAT_ILLUM|o->otype==MAT_GLOW);} |
| 372 |
|
|
| 373 |
+ |
#define illumblock(m, r) (!(source[r->rsrc].sflags&SVIRTUAL) && \ |
| 374 |
+ |
weaksrcmod(source[r->rsrc].so->omod)) |
| 375 |
+ |
|
| 376 |
|
/* wrongsource * |
| 377 |
|
* |
| 378 |
|
* This source is the wrong source (ie. overcounted) if we are |
| 379 |
|
* aimed to a different source than the one we hit and the one |
| 380 |
< |
* we hit is not an illum which should be passed. |
| 380 |
> |
* we hit is not an illum that should be passed. |
| 381 |
|
*/ |
| 382 |
|
|
| 383 |
|
#define wrongsource(m, r) (r->rsrc>=0 && source[r->rsrc].so!=r->ro && \ |
| 384 |
< |
(m->otype!=MAT_ILLUM || wrongillum(m,r))) |
| 384 |
> |
(m->otype!=MAT_ILLUM || illumblock(m,r))) |
| 385 |
|
|
| 386 |
|
/* distglow * |
| 387 |
|
* |
| 388 |
|
* A distant glow is an object that sometimes acts as a light source, |
| 389 |
|
* but is too far away from the test point to be one in this case. |
| 390 |
+ |
* (Glows with negative radii should NEVER participate in illumination.) |
| 391 |
|
*/ |
| 392 |
|
|
| 393 |
|
#define distglow(m, r) (m->otype==MAT_GLOW && \ |
