| 19 |
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#if SHADCACHE /* preemptive shadow checking */ |
| 20 |
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| 21 |
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| 22 |
< |
static void /* cast source ray to first blocker */ |
| 22 |
> |
OBJECT * antimodlist = NULL; /* set of clipped materials */ |
| 23 |
> |
|
| 24 |
> |
|
| 25 |
> |
static int /* cast source ray to first blocker */ |
| 26 |
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castshadow(int sn, FVECT rorg, FVECT rdir) |
| 27 |
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{ |
| 28 |
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RAY rt; |
| 30 |
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VCOPY(rt.rorg, rorg); |
| 31 |
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VCOPY(rt.rdir, rdir); |
| 32 |
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rt.rmax = 0; |
| 33 |
< |
rayorigin(&rt, NULL, PRIMARY, 1.0); |
| 34 |
< |
if (!localhit(&rt, &thescene)) |
| 35 |
< |
return; |
| 36 |
< |
/* pretend we were aimed at source */ |
| 37 |
< |
rt.crtype |= rt.rtype = SHADOW; |
| 38 |
< |
rt.rdir[0] = -rt.rdir[0]; |
| 39 |
< |
rt.rdir[1] = -rt.rdir[1]; |
| 40 |
< |
rt.rdir[2] = -rt.rdir[2]; |
| 41 |
< |
rt.rod = -rt.rod; |
| 42 |
< |
VSUB(rt.rorg, rt.rop, rt.rdir); |
| 43 |
< |
rt.rot = 1.; |
| 44 |
< |
rt.rsrc = sn; |
| 33 |
> |
rayorigin(&rt, PRIMARY, NULL, NULL); |
| 34 |
> |
/* check for intersection */ |
| 35 |
> |
while (localhit(&rt, &thescene)) { |
| 36 |
> |
RAY rt1 = rt; /* pretend we were aimed at source */ |
| 37 |
> |
rt1.crtype |= rt1.rtype = SHADOW; |
| 38 |
> |
rt1.rdir[0] = -rt.rdir[0]; |
| 39 |
> |
rt1.rdir[1] = -rt.rdir[1]; |
| 40 |
> |
rt1.rdir[2] = -rt.rdir[2]; |
| 41 |
> |
rt1.rod = -rt.rod; |
| 42 |
> |
VSUB(rt1.rorg, rt.rop, rt.rdir); |
| 43 |
> |
rt1.rot = 1.; |
| 44 |
> |
rt1.rsrc = sn; |
| 45 |
|
/* record blocker */ |
| 46 |
< |
srcblocker(&rt); |
| 46 |
> |
if (srcblocker(&rt1)) |
| 47 |
> |
return(1); |
| 48 |
> |
/* move past failed blocker */ |
| 49 |
> |
VSUM(rt.rorg, rt.rop, rt.rdir, FTINY); |
| 50 |
> |
rayclear(&rt); /* & try again... */ |
| 51 |
> |
} |
| 52 |
> |
return(0); /* found no blockers */ |
| 53 |
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} |
| 54 |
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|
| 55 |
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|
| 56 |
< |
static void /* initialize occlusion cache */ |
| 56 |
> |
void /* initialize occlusion cache */ |
| 57 |
|
initobscache(int sn) |
| 58 |
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{ |
| 59 |
|
register SRCREC *srcp = &source[sn]; |
| 63 |
|
int i, j, k; |
| 64 |
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int ax, ax1, ax2; |
| 65 |
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|
| 66 |
+ |
if (srcp->sflags & (SSKIP|SPROX|SSPOT|SVIRTUAL)) |
| 67 |
+ |
return; /* don't cache these */ |
| 68 |
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if (srcp->sflags & SDISTANT) |
| 69 |
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cachelen = 4*SHADCACHE*SHADCACHE; |
| 70 |
|
else if (srcp->sflags & SFLAT) |
| 72 |
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else /* spherical distribution */ |
| 73 |
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cachelen = SHADCACHE*SHADCACHE*6; |
| 74 |
|
/* allocate cache */ |
| 64 |
– |
DCHECK(srcp->obscache != NULL, |
| 65 |
– |
CONSISTENCY, "initobscache() called twice"); |
| 75 |
|
srcp->obscache = (OBSCACHE *)malloc(sizeof(OBSCACHE) + |
| 76 |
|
sizeof(OBJECT)*(cachelen-1)); |
| 77 |
|
if (srcp->obscache == NULL) |
| 178 |
|
static OBJECT * /* return occluder cache entry */ |
| 179 |
|
srcobstructp(register RAY *r) |
| 180 |
|
{ |
| 181 |
+ |
static unsigned long lastrno = ~0; |
| 182 |
|
static OBJECT noobs; |
| 183 |
+ |
static OBJECT *lastobjp; |
| 184 |
|
SRCREC *srcp; |
| 185 |
|
int ondx; |
| 186 |
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|
| 187 |
+ |
noobs = OVOID; |
| 188 |
+ |
if (r->rno == lastrno) |
| 189 |
+ |
return lastobjp; /* just recall last pointer */ |
| 190 |
|
DCHECK(r->rsrc < 0, CONSISTENCY, |
| 191 |
|
"srcobstructp() called with unaimed ray"); |
| 192 |
< |
noobs = OVOID; |
| 192 |
> |
lastrno = r->rno; |
| 193 |
> |
lastobjp = &noobs; |
| 194 |
|
srcp = &source[r->rsrc]; |
| 195 |
|
if (srcp->sflags & (SSKIP|SPROX|SSPOT|SVIRTUAL)) |
| 196 |
|
return(&noobs); /* don't cache these */ |
| 247 |
|
ondx += (int)(SHADCACHE*(.5-FTINY) * |
| 248 |
|
(1. + sd[0]/sd1m)); |
| 249 |
|
} |
| 250 |
< |
DCHECK(ondx < 0 | ondx >= SHADCACHE*SHADCACHE*3 + |
| 251 |
< |
(SHADCACHE&1)*SHADCACHE*4, CONSISTENCY, |
| 250 |
> |
DCHECK((ondx < 0) | (ondx >= SHADCACHE*SHADCACHE*3 + |
| 251 |
> |
(SHADCACHE&1)*SHADCACHE*4), CONSISTENCY, |
| 252 |
|
"flat source cache index out of bounds"); |
| 253 |
|
} else /* spherical distribution */ { |
| 254 |
|
int ax, ax1, ax2; |
| 267 |
|
(1. + r->rdir[ax1]/amax)); |
| 268 |
|
ondx += (int)(SHADCACHE*(.5-FTINY) * |
| 269 |
|
(1. + r->rdir[ax2]/amax)); |
| 270 |
< |
DCHECK(ondx < 0 | ondx >= SHADCACHE*SHADCACHE*6, CONSISTENCY, |
| 270 |
> |
DCHECK((ondx < 0) | (ondx >= SHADCACHE*SHADCACHE*6), CONSISTENCY, |
| 271 |
|
"radial source cache index out of bounds"); |
| 272 |
|
} |
| 273 |
|
/* return cache pointer */ |
| 274 |
< |
return(&srcp->obscache->obs[ondx]); |
| 274 |
> |
return(lastobjp = &srcp->obscache->obs[ondx]); |
| 275 |
|
} |
| 276 |
|
|
| 277 |
|
|
| 285 |
|
} |
| 286 |
|
|
| 287 |
|
|
| 288 |
< |
void /* record a source blocker */ |
| 288 |
> |
int /* record a source blocker */ |
| 289 |
|
srcblocker(register RAY *r) |
| 290 |
|
{ |
| 291 |
|
OBJREC *m; |
| 292 |
|
|
| 293 |
|
if (r->robj == OVOID || objptr(r->robj) != r->ro || |
| 294 |
|
isvolume(r->ro->otype)) |
| 295 |
< |
return; /* don't record complex blockers */ |
| 295 |
> |
return(0); /* don't record complex blockers */ |
| 296 |
> |
if (r->rsrc < 0 || source[r->rsrc].so == r->ro) |
| 297 |
> |
return(0); /* just a mistake, that's all */ |
| 298 |
> |
if (antimodlist != NULL && inset(antimodlist, r->ro->omod)) |
| 299 |
> |
return(0); /* could be clipped */ |
| 300 |
|
m = findmaterial(r->ro); |
| 301 |
|
if (m == NULL) |
| 302 |
< |
return; /* no material?! */ |
| 302 |
> |
return(0); /* no material?! */ |
| 303 |
|
if (!isopaque(m->otype)) |
| 304 |
< |
return; /* material not a reliable blocker */ |
| 304 |
> |
return(0); /* material not a reliable blocker */ |
| 305 |
|
*srcobstructp(r) = r->robj; /* else record obstructor */ |
| 306 |
+ |
return(1); |
| 307 |
|
} |
| 308 |
|
|
| 309 |
|
|
| 315 |
|
|
| 316 |
|
if (obs == OVOID) |
| 317 |
|
return(0); |
| 318 |
< |
op = objptr(obs); /* check for intersection */ |
| 319 |
< |
return((*ofun[op->otype].funp)(op, r)); |
| 318 |
> |
op = objptr(obs); /* check blocker intersection */ |
| 319 |
> |
if (!(*ofun[op->otype].funp)(op, r)) |
| 320 |
> |
return(0); |
| 321 |
> |
if (source[r->rsrc].sflags & SDISTANT) |
| 322 |
> |
return(1); |
| 323 |
> |
op = source[r->rsrc].so; /* check source intersection */ |
| 324 |
> |
if (!(*ofun[op->otype].funp)(op, r)) |
| 325 |
> |
return(1); |
| 326 |
> |
rayclear(r); |
| 327 |
> |
return(0); /* source in front */ |
| 328 |
> |
} |
| 329 |
> |
|
| 330 |
> |
|
| 331 |
> |
void /* record potentially clipped materials */ |
| 332 |
> |
markclip(OBJREC *m) |
| 333 |
> |
{ |
| 334 |
> |
OBJECT *set2add, *oldset; |
| 335 |
> |
|
| 336 |
> |
m_clip(m, NULL); /* initialize modifier list */ |
| 337 |
> |
if ((set2add = (OBJECT *)m->os) == NULL || !set2add[0]) |
| 338 |
> |
return; |
| 339 |
> |
|
| 340 |
> |
if (antimodlist == NULL) { /* start of list */ |
| 341 |
> |
antimodlist = setsave(set2add); |
| 342 |
> |
return; |
| 343 |
> |
} |
| 344 |
> |
/* else add to previous list */ |
| 345 |
> |
oldset = antimodlist; |
| 346 |
> |
antimodlist = (OBJECT *)malloc((oldset[0]+set2add[0]+1)*sizeof(OBJECT)); |
| 347 |
> |
if (antimodlist == NULL) |
| 348 |
> |
error(SYSTEM, "out of memory in markclip"); |
| 349 |
> |
setunion(antimodlist, oldset, set2add); |
| 350 |
> |
free((void *)oldset); |
| 351 |
> |
} |
| 352 |
> |
|
| 353 |
> |
|
| 354 |
> |
#else /* SHADCACHE */ |
| 355 |
> |
|
| 356 |
> |
|
| 357 |
> |
void /* no-op also avoids linker warning */ |
| 358 |
> |
markclip(OBJREC *m) |
| 359 |
> |
{ |
| 360 |
> |
(void)m; |
| 361 |
|
} |
| 362 |
|
|
| 363 |
|
|
