1 |
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/* Copyright (c) 1993 Regents of the University of California */ |
2 |
– |
|
1 |
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#ifndef lint |
2 |
< |
static char SCCSid[] = "$SunId$ LBL"; |
2 |
> |
static const char RCSid[] = "$Id$"; |
3 |
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#endif |
6 |
– |
|
4 |
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/* |
5 |
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* source.c - routines dealing with illumination sources. |
6 |
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* |
7 |
< |
* 8/20/85 |
7 |
> |
* External symbols declared in source.h |
8 |
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*/ |
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|
10 |
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#include "ray.h" |
14 |
– |
|
15 |
– |
#include "octree.h" |
16 |
– |
|
11 |
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#include "otypes.h" |
12 |
< |
|
12 |
> |
#include "rtotypes.h" |
13 |
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#include "source.h" |
14 |
+ |
#include "random.h" |
15 |
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|
16 |
+ |
extern double ssampdist; /* scatter sampling distance */ |
17 |
+ |
|
18 |
+ |
#ifndef MAXSSAMP |
19 |
+ |
#define MAXSSAMP 16 /* maximum samples per ray */ |
20 |
+ |
#endif |
21 |
+ |
|
22 |
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/* |
23 |
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* Structures used by direct() |
24 |
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*/ |
39 |
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static CNTPTR *cntord; /* source ordering in direct() */ |
40 |
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static int maxcntr = 0; /* size of contribution arrays */ |
41 |
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|
42 |
+ |
static int cntcmp(const void *p1, const void *p2); |
43 |
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|
44 |
< |
marksources() /* find and mark source objects */ |
44 |
> |
|
45 |
> |
extern OBJREC * /* find an object's actual material */ |
46 |
> |
findmaterial(register OBJREC *o) |
47 |
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{ |
48 |
+ |
while (!ismaterial(o->otype)) { |
49 |
+ |
if (ismixture(o->otype)) |
50 |
+ |
return(NULL); /* reject mixed materials */ |
51 |
+ |
if (o->otype == MOD_ALIAS && o->oargs.nsargs) { |
52 |
+ |
OBJECT aobj; |
53 |
+ |
OBJREC *ao; |
54 |
+ |
aobj = lastmod(objndx(o), o->oargs.sarg[0]); |
55 |
+ |
if (aobj < 0) |
56 |
+ |
objerror(o, USER, "bad reference"); |
57 |
+ |
ao = objptr(aobj); |
58 |
+ |
if (ismaterial(ao->otype)) |
59 |
+ |
return(ao); |
60 |
+ |
} |
61 |
+ |
if (o->omod == OVOID) |
62 |
+ |
return(NULL); |
63 |
+ |
o = objptr(o->omod); |
64 |
+ |
} |
65 |
+ |
return(o); |
66 |
+ |
} |
67 |
+ |
|
68 |
+ |
|
69 |
+ |
extern void |
70 |
+ |
marksources(void) /* find and mark source objects */ |
71 |
+ |
{ |
72 |
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int foundsource = 0; |
73 |
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int i; |
74 |
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register OBJREC *o, *m; |
76 |
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/* initialize dispatch table */ |
77 |
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initstypes(); |
78 |
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/* find direct sources */ |
79 |
< |
for (i = 0; i < nobjects; i++) { |
79 |
> |
for (i = 0; i < nsceneobjs; i++) { |
80 |
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|
81 |
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o = objptr(i); |
82 |
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|
83 |
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if (!issurface(o->otype) || o->omod == OVOID) |
84 |
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continue; |
85 |
< |
|
86 |
< |
m = objptr(o->omod); |
87 |
< |
|
88 |
< |
if (!islight(m->otype)) |
61 |
< |
continue; |
85 |
> |
/* find material */ |
86 |
> |
m = findmaterial(objptr(o->omod)); |
87 |
> |
if (m == NULL || !islight(m->otype)) |
88 |
> |
continue; /* not source modifier */ |
89 |
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|
90 |
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if (m->oargs.nfargs != (m->otype == MAT_GLOW ? 4 : |
91 |
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m->otype == MAT_SPOT ? 7 : 3)) |
95 |
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o->otype != OBJ_SOURCE && |
96 |
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m->oargs.farg[3] <= FTINY) |
97 |
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continue; /* don't bother */ |
98 |
+ |
if (m->oargs.farg[0] <= FTINY && m->oargs.farg[1] <= FTINY && |
99 |
+ |
m->oargs.farg[2] <= FTINY) |
100 |
+ |
continue; /* don't bother */ |
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|
102 |
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if (sfun[o->otype].of == NULL || |
103 |
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sfun[o->otype].of->setsrc == NULL) |
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source[ns].sflags |= SSKIP; |
125 |
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} |
126 |
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} |
127 |
+ |
#if SHADCACHE |
128 |
+ |
source[ns].obscache = NULL; |
129 |
+ |
#endif |
130 |
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if (!(source[ns].sflags & SSKIP)) |
131 |
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foundsource++; |
132 |
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} |
139 |
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maxcntr = nsources + MAXSPART; /* start with this many */ |
140 |
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srccnt = (CONTRIB *)malloc(maxcntr*sizeof(CONTRIB)); |
141 |
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cntord = (CNTPTR *)malloc(maxcntr*sizeof(CNTPTR)); |
142 |
< |
if (srccnt == NULL | cntord == NULL) |
142 |
> |
if ((srccnt == NULL) | (cntord == NULL)) |
143 |
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goto memerr; |
144 |
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return; |
145 |
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memerr: |
147 |
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} |
148 |
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|
149 |
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|
150 |
< |
srcray(sr, r, si) /* send a ray to a source, return domega */ |
151 |
< |
register RAY *sr; /* returned source ray */ |
119 |
< |
RAY *r; /* ray which hit object */ |
120 |
< |
SRCINDEX *si; /* source sample index */ |
150 |
> |
extern void |
151 |
> |
freesources(void) /* free all source structures */ |
152 |
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{ |
153 |
+ |
if (nsources > 0) { |
154 |
+ |
#if SHADCACHE |
155 |
+ |
while (nsources--) |
156 |
+ |
freeobscache(&source[nsources]); |
157 |
+ |
#endif |
158 |
+ |
free((void *)source); |
159 |
+ |
source = NULL; |
160 |
+ |
nsources = 0; |
161 |
+ |
} |
162 |
+ |
if (maxcntr <= 0) |
163 |
+ |
return; |
164 |
+ |
free((void *)srccnt); |
165 |
+ |
srccnt = NULL; |
166 |
+ |
free((void *)cntord); |
167 |
+ |
cntord = NULL; |
168 |
+ |
maxcntr = 0; |
169 |
+ |
} |
170 |
+ |
|
171 |
+ |
|
172 |
+ |
extern int |
173 |
+ |
srcray( /* send a ray to a source, return domega */ |
174 |
+ |
register RAY *sr, /* returned source ray */ |
175 |
+ |
RAY *r, /* ray which hit object */ |
176 |
+ |
SRCINDEX *si /* source sample index */ |
177 |
+ |
) |
178 |
+ |
{ |
179 |
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double d; /* distance to source */ |
180 |
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register SRCREC *srcp; |
181 |
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|
185 |
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sr->rsrc = si->sn; /* remember source */ |
186 |
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srcp = source + si->sn; |
187 |
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if (srcp->sflags & SDISTANT) { |
188 |
< |
if (srcp->sflags & SSPOT && spotout(sr, srcp->sl.s, 1)) |
188 |
> |
if (srcp->sflags & SSPOT && spotout(sr, srcp->sl.s)) |
189 |
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continue; |
190 |
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return(1); /* sample OK */ |
191 |
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} |
195 |
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continue; |
196 |
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/* check angle */ |
197 |
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if (srcp->sflags & SSPOT) { |
198 |
< |
if (spotout(sr, srcp->sl.s, 0)) |
198 |
> |
if (spotout(sr, srcp->sl.s)) |
199 |
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continue; |
200 |
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/* adjust solid angle */ |
201 |
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si->dom *= d*d; |
208 |
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} |
209 |
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|
210 |
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|
211 |
< |
srcvalue(r) /* punch ray to source and compute value */ |
212 |
< |
RAY *r; |
211 |
> |
extern void |
212 |
> |
srcvalue( /* punch ray to source and compute value */ |
213 |
> |
register RAY *r |
214 |
> |
) |
215 |
|
{ |
216 |
|
register SRCREC *sp; |
217 |
|
|
220 |
|
/* check intersection */ |
221 |
|
if (!(*ofun[sp->so->otype].funp)(sp->so, r)) |
222 |
|
return; |
223 |
< |
raycont(r); /* compute contribution */ |
223 |
> |
if (!rayshade(r, r->ro->omod)) /* compute contribution */ |
224 |
> |
goto nomat; |
225 |
> |
rayparticipate(r); |
226 |
|
return; |
227 |
|
} |
228 |
|
/* compute intersection */ |
230 |
|
(*ofun[sp->so->otype].funp)(sp->so, r)) { |
231 |
|
if (sp->sa.success >= 0) |
232 |
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sp->sa.success++; |
233 |
< |
raycont(r); /* compute contribution */ |
233 |
> |
if (!rayshade(r, r->ro->omod)) /* compute contribution */ |
234 |
> |
goto nomat; |
235 |
> |
rayparticipate(r); |
236 |
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return; |
237 |
|
} |
238 |
+ |
/* we missed our mark! */ |
239 |
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if (sp->sa.success < 0) |
240 |
|
return; /* bitched already */ |
241 |
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sp->sa.success -= AIMREQT; |
244 |
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sprintf(errmsg, "aiming failure for light source \"%s\"", |
245 |
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sp->so->oname); |
246 |
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error(WARNING, errmsg); /* issue warning */ |
247 |
+ |
return; |
248 |
+ |
nomat: |
249 |
+ |
objerror(r->ro, USER, "material not found"); |
250 |
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} |
251 |
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|
252 |
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|
253 |
< |
sourcehit(r) /* check to see if ray hit distant source */ |
254 |
< |
register RAY *r; |
253 |
> |
extern int |
254 |
> |
sourcehit( /* check to see if ray hit distant source */ |
255 |
> |
register RAY *r |
256 |
> |
) |
257 |
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{ |
258 |
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int first, last; |
259 |
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register int i; |
277 |
|
} |
278 |
|
|
279 |
|
if (r->ro != NULL) { |
280 |
+ |
r->robj = objndx(r->ro); |
281 |
|
for (i = 0; i < 3; i++) |
282 |
|
r->ron[i] = -r->rdir[i]; |
283 |
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r->rod = 1.0; |
284 |
+ |
r->pert[0] = r->pert[1] = r->pert[2] = 0.0; |
285 |
+ |
r->uv[0] = r->uv[1] = 0.0; |
286 |
|
r->rox = NULL; |
287 |
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return(1); |
288 |
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} |
291 |
|
|
292 |
|
|
293 |
|
static int |
294 |
< |
cntcmp(sc1, sc2) /* contribution compare (descending) */ |
295 |
< |
register CNTPTR *sc1, *sc2; |
294 |
> |
cntcmp( /* contribution compare (descending) */ |
295 |
> |
const void *p1, |
296 |
> |
const void *p2 |
297 |
> |
) |
298 |
|
{ |
299 |
+ |
register const CNTPTR *sc1 = (const CNTPTR *)p1; |
300 |
+ |
register const CNTPTR *sc2 = (const CNTPTR *)p2; |
301 |
+ |
|
302 |
|
if (sc1->brt > sc2->brt) |
303 |
|
return(-1); |
304 |
|
if (sc1->brt < sc2->brt) |
307 |
|
} |
308 |
|
|
309 |
|
|
310 |
< |
direct(r, f, p) /* add direct component */ |
311 |
< |
RAY *r; /* ray that hit surface */ |
312 |
< |
int (*f)(); /* direct component coefficient function */ |
313 |
< |
char *p; /* data for f */ |
310 |
> |
extern void |
311 |
> |
direct( /* add direct component */ |
312 |
> |
RAY *r, /* ray that hit surface */ |
313 |
> |
srcdirf_t *f, /* direct component coefficient function */ |
314 |
> |
void *p /* data for f */ |
315 |
> |
) |
316 |
|
{ |
238 |
– |
extern int (*trace)(); |
317 |
|
register int sn; |
318 |
|
register CONTRIB *scp; |
319 |
|
SRCINDEX si; |
329 |
|
for (sn = 0; srcray(&sr, r, &si); sn++) { |
330 |
|
if (sn >= maxcntr) { |
331 |
|
maxcntr = sn + MAXSPART; |
332 |
< |
srccnt = (CONTRIB *)realloc((char *)srccnt, |
332 |
> |
srccnt = (CONTRIB *)realloc((void *)srccnt, |
333 |
|
maxcntr*sizeof(CONTRIB)); |
334 |
< |
cntord = (CNTPTR *)realloc((char *)cntord, |
334 |
> |
cntord = (CNTPTR *)realloc((void *)cntord, |
335 |
|
maxcntr*sizeof(CNTPTR)); |
336 |
< |
if (srccnt == NULL | cntord == NULL) |
336 |
> |
if ((srccnt == NULL) | (cntord == NULL)) |
337 |
|
error(SYSTEM, "out of memory in direct"); |
338 |
|
} |
339 |
|
cntord[sn].sndx = sn; |
344 |
|
cntord[sn].brt = bright(scp->coef); |
345 |
|
if (cntord[sn].brt <= 0.0) |
346 |
|
continue; |
347 |
+ |
#if SHADCACHE |
348 |
+ |
/* check shadow cache */ |
349 |
+ |
if (si.np == 1 && srcblocked(&sr)) { |
350 |
+ |
cntord[sn].brt = 0.0; |
351 |
+ |
continue; |
352 |
+ |
} |
353 |
+ |
#endif |
354 |
|
VCOPY(scp->dir, sr.rdir); |
355 |
|
/* compute potential */ |
356 |
|
sr.revf = srcvalue; |
384 |
|
/* modify threshold */ |
385 |
|
ourthresh = shadthresh / r->rweight; |
386 |
|
/* test for shadows */ |
387 |
< |
nhits = 0; |
388 |
< |
for (sn = 0; sn < ncnts; sn++) { |
387 |
> |
for (nhits = 0, hwt = 0.0, sn = 0; sn < ncnts; |
388 |
> |
hwt += (double)source[scp->sno].nhits / |
389 |
> |
(double)source[scp->sno].ntests, |
390 |
> |
sn++) { |
391 |
|
/* check threshold */ |
392 |
|
if ((sn+nshadcheck>=ncnts ? cntord[sn].brt : |
393 |
|
cntord[sn].brt-cntord[sn+nshadcheck].brt) |
398 |
|
rayorigin(&sr, r, SHADOW, 1.0); |
399 |
|
VCOPY(sr.rdir, scp->dir); |
400 |
|
sr.rsrc = scp->sno; |
401 |
< |
source[scp->sno].ntests++; /* keep statistics */ |
401 |
> |
/* keep statistics */ |
402 |
> |
if (source[scp->sno].ntests++ > 0xfffffff0) { |
403 |
> |
source[scp->sno].ntests >>= 1; |
404 |
> |
source[scp->sno].nhits >>= 1; |
405 |
> |
} |
406 |
|
if (localhit(&sr, &thescene) && |
407 |
|
( sr.ro != source[scp->sno].so || |
408 |
|
source[scp->sno].sflags & SFOLLOW )) { |
409 |
|
/* follow entire path */ |
410 |
|
raycont(&sr); |
411 |
+ |
rayparticipate(&sr); |
412 |
|
if (trace != NULL) |
413 |
|
(*trace)(&sr); /* trace execution */ |
414 |
< |
if (bright(sr.rcol) <= FTINY) |
414 |
> |
if (bright(sr.rcol) <= FTINY) { |
415 |
> |
#if SHADCACHE |
416 |
> |
if ((scp <= srccnt || scp[-1].sno != scp->sno) |
417 |
> |
&& (scp >= srccnt+ncnts-1 || |
418 |
> |
scp[1].sno != scp->sno)) |
419 |
> |
srcblocker(&sr); |
420 |
> |
#endif |
421 |
|
continue; /* missed! */ |
422 |
+ |
} |
423 |
|
copycolor(scp->val, sr.rcol); |
424 |
|
multcolor(scp->val, scp->coef); |
425 |
|
} |
428 |
|
nhits++; |
429 |
|
source[scp->sno].nhits++; |
430 |
|
} |
431 |
< |
/* surface hit rate */ |
432 |
< |
if (sn > 0) |
433 |
< |
hwt = (double)nhits / (double)sn; |
431 |
> |
/* source hit rate */ |
432 |
> |
if (hwt > FTINY) |
433 |
> |
hwt = (double)nhits / hwt; |
434 |
|
else |
435 |
|
hwt = 0.5; |
436 |
|
#ifdef DEBUG |
437 |
< |
sprintf(errmsg, "%d tested, %d untested, %f hit rate\n", |
437 |
> |
sprintf(errmsg, "%d tested, %d untested, %f conditional hit rate\n", |
438 |
|
sn, ncnts-sn, hwt); |
439 |
|
eputs(errmsg); |
440 |
|
#endif |
443 |
|
scp = srccnt + cntord[sn].sndx; |
444 |
|
prob = hwt * (double)source[scp->sno].nhits / |
445 |
|
(double)source[scp->sno].ntests; |
446 |
+ |
if (prob > 1.0) |
447 |
+ |
prob = 1.0; |
448 |
|
scalecolor(scp->val, prob); |
449 |
|
addcolor(r->rcol, scp->val); |
450 |
|
} |
451 |
|
} |
452 |
|
|
453 |
|
|
454 |
+ |
extern void |
455 |
+ |
srcscatter( /* compute source scattering into ray */ |
456 |
+ |
register RAY *r |
457 |
+ |
) |
458 |
+ |
{ |
459 |
+ |
int oldsampndx; |
460 |
+ |
int nsamps; |
461 |
+ |
RAY sr; |
462 |
+ |
SRCINDEX si; |
463 |
+ |
double t, d; |
464 |
+ |
double re, ge, be; |
465 |
+ |
COLOR cvext; |
466 |
+ |
int i, j; |
467 |
+ |
|
468 |
+ |
if (r->slights == NULL || r->slights[0] == 0 |
469 |
+ |
|| r->gecc >= 1.-FTINY || r->rot >= FHUGE) |
470 |
+ |
return; |
471 |
+ |
if (ssampdist <= FTINY || (nsamps = r->rot/ssampdist + .5) < 1) |
472 |
+ |
nsamps = 1; |
473 |
+ |
#if MAXSSAMP |
474 |
+ |
else if (nsamps > MAXSSAMP) |
475 |
+ |
nsamps = MAXSSAMP; |
476 |
+ |
#endif |
477 |
+ |
oldsampndx = samplendx; |
478 |
+ |
samplendx = random()&0x7fff; /* randomize */ |
479 |
+ |
for (i = r->slights[0]; i > 0; i--) { /* for each source */ |
480 |
+ |
for (j = 0; j < nsamps; j++) { /* for each sample position */ |
481 |
+ |
samplendx++; |
482 |
+ |
t = r->rot * (j+frandom())/nsamps; |
483 |
+ |
/* extinction */ |
484 |
+ |
re = t*colval(r->cext,RED); |
485 |
+ |
ge = t*colval(r->cext,GRN); |
486 |
+ |
be = t*colval(r->cext,BLU); |
487 |
+ |
setcolor(cvext, re > 92. ? 0. : exp(-re), |
488 |
+ |
ge > 92. ? 0. : exp(-ge), |
489 |
+ |
be > 92. ? 0. : exp(-be)); |
490 |
+ |
if (intens(cvext) <= FTINY) |
491 |
+ |
break; /* too far away */ |
492 |
+ |
sr.rorg[0] = r->rorg[0] + r->rdir[0]*t; |
493 |
+ |
sr.rorg[1] = r->rorg[1] + r->rdir[1]*t; |
494 |
+ |
sr.rorg[2] = r->rorg[2] + r->rdir[2]*t; |
495 |
+ |
sr.rmax = 0.; |
496 |
+ |
initsrcindex(&si); /* sample ray to this source */ |
497 |
+ |
si.sn = r->slights[i]; |
498 |
+ |
nopart(&si, &sr); |
499 |
+ |
if (!srcray(&sr, NULL, &si) || |
500 |
+ |
sr.rsrc != r->slights[i]) |
501 |
+ |
continue; /* no path */ |
502 |
+ |
#if SHADCACHE |
503 |
+ |
if (srcblocked(&sr)) /* check shadow cache */ |
504 |
+ |
continue; |
505 |
+ |
#endif |
506 |
+ |
copycolor(sr.cext, r->cext); |
507 |
+ |
copycolor(sr.albedo, r->albedo); |
508 |
+ |
sr.gecc = r->gecc; |
509 |
+ |
sr.slights = r->slights; |
510 |
+ |
rayvalue(&sr); /* eval. source ray */ |
511 |
+ |
if (bright(sr.rcol) <= FTINY) { |
512 |
+ |
#if SHADCACHE |
513 |
+ |
srcblocker(&sr); /* add blocker to cache */ |
514 |
+ |
#endif |
515 |
+ |
continue; |
516 |
+ |
} |
517 |
+ |
if (r->gecc <= FTINY) /* compute P(theta) */ |
518 |
+ |
d = 1.; |
519 |
+ |
else { |
520 |
+ |
d = DOT(r->rdir, sr.rdir); |
521 |
+ |
d = 1. + r->gecc*r->gecc - 2.*r->gecc*d; |
522 |
+ |
d = (1. - r->gecc*r->gecc) / (d*sqrt(d)); |
523 |
+ |
} |
524 |
+ |
/* other factors */ |
525 |
+ |
d *= si.dom * r->rot / (4.*PI*nsamps); |
526 |
+ |
multcolor(sr.rcol, r->cext); |
527 |
+ |
multcolor(sr.rcol, r->albedo); |
528 |
+ |
scalecolor(sr.rcol, d); |
529 |
+ |
multcolor(sr.rcol, cvext); |
530 |
+ |
addcolor(r->rcol, sr.rcol); /* add it in */ |
531 |
+ |
} |
532 |
+ |
} |
533 |
+ |
samplendx = oldsampndx; |
534 |
+ |
} |
535 |
+ |
|
536 |
+ |
|
537 |
|
/**************************************************************** |
538 |
|
* The following macros were separated from the m_light() routine |
539 |
|
* because they are very nasty and difficult to understand. |
550 |
|
* geometry behind (or inside) an effective radiator. |
551 |
|
*/ |
552 |
|
|
553 |
< |
static int weaksrcmod(obj) int obj; /* efficiency booster function */ |
554 |
< |
{register OBJREC *o = objptr(obj); |
555 |
< |
return(o->otype==MAT_ILLUM|o->otype==MAT_GLOW);} |
553 |
> |
static int |
554 |
> |
weaksrcmat(OBJECT obj) /* identify material */ |
555 |
> |
{ |
556 |
> |
OBJREC *o = findmaterial(objptr(obj)); |
557 |
> |
|
558 |
> |
if (o == NULL) return 0; |
559 |
> |
return((o->otype==MAT_ILLUM)|(o->otype==MAT_GLOW)); |
560 |
> |
} |
561 |
|
|
562 |
|
#define illumblock(m, r) (!(source[r->rsrc].sflags&SVIRTUAL) && \ |
563 |
< |
weaksrcmod(source[r->rsrc].so->omod)) |
563 |
> |
r->rod > 0.0 && \ |
564 |
> |
weaksrcmat(source[r->rsrc].so->omod)) |
565 |
|
|
566 |
|
/* wrongsource * |
567 |
|
* |
580 |
|
* (Glows with negative radii should NEVER participate in illumination.) |
581 |
|
*/ |
582 |
|
|
583 |
< |
#define distglow(m, r) (m->otype==MAT_GLOW && \ |
583 |
> |
#define distglow(m, r, d) (m->otype==MAT_GLOW && \ |
584 |
|
m->oargs.farg[3] >= -FTINY && \ |
585 |
< |
r->rot > m->oargs.farg[3]) |
585 |
> |
d > m->oargs.farg[3]) |
586 |
|
|
587 |
|
/* badcomponent * |
588 |
|
* |
595 |
|
|
596 |
|
#define badcomponent(m, r) (r->crtype&(AMBIENT|SPECULAR) && \ |
597 |
|
!(r->crtype&SHADOW || r->rod < 0.0 || \ |
598 |
< |
distglow(m, r))) |
598 |
> |
/* not 100% correct */ distglow(m, r, r->rot))) |
599 |
|
|
410 |
– |
/* overcount * |
411 |
– |
* |
412 |
– |
* All overcounting possibilities are contained here. |
413 |
– |
*/ |
414 |
– |
|
415 |
– |
#define overcount(m, r) (badcomponent(m,r) || wrongsource(m,r)) |
416 |
– |
|
600 |
|
/* passillum * |
601 |
|
* |
602 |
|
* An illum passes to another material type when we didn't hit it |
613 |
|
* The -dv flag is normally on for sources to be visible. |
614 |
|
*/ |
615 |
|
|
616 |
< |
#define srcignore(m, r) (!directvis && !(r->crtype&SHADOW) && \ |
617 |
< |
!distglow(m, r)) |
616 |
> |
#define srcignore(m, r) !(directvis || r->crtype&SHADOW || \ |
617 |
> |
distglow(m, r, raydist(r,PRIMARY))) |
618 |
|
|
619 |
|
|
620 |
< |
m_light(m, r) /* ray hit a light source */ |
621 |
< |
register OBJREC *m; |
622 |
< |
register RAY *r; |
620 |
> |
extern int |
621 |
> |
m_light( /* ray hit a light source */ |
622 |
> |
register OBJREC *m, |
623 |
> |
register RAY *r |
624 |
> |
) |
625 |
|
{ |
626 |
|
/* check for over-counting */ |
627 |
< |
if (overcount(m, r)) |
628 |
< |
return; |
627 |
> |
if (badcomponent(m, r)) |
628 |
> |
return(1); |
629 |
> |
if (wrongsource(m, r)) |
630 |
> |
return(1); |
631 |
|
/* check for passed illum */ |
632 |
|
if (passillum(m, r)) { |
633 |
< |
if (m->oargs.nsargs < 1 || !strcmp(m->oargs.sarg[0], VOIDID)) |
634 |
< |
raytrans(r); |
635 |
< |
else |
636 |
< |
rayshade(r, modifier(m->oargs.sarg[0])); |
450 |
< |
return; |
633 |
> |
if (m->oargs.nsargs && strcmp(m->oargs.sarg[0], VOIDID)) |
634 |
> |
return(rayshade(r,lastmod(objndx(m),m->oargs.sarg[0]))); |
635 |
> |
raytrans(r); |
636 |
> |
return(1); |
637 |
|
} |
638 |
|
/* otherwise treat as source */ |
639 |
|
/* check for behind */ |
640 |
|
if (r->rod < 0.0) |
641 |
< |
return; |
641 |
> |
return(1); |
642 |
|
/* check for invisibility */ |
643 |
|
if (srcignore(m, r)) |
644 |
< |
return; |
644 |
> |
return(1); |
645 |
|
/* check for outside spot */ |
646 |
< |
if (m->otype==MAT_SPOT && spotout(r, makespot(m), r->rot>=FHUGE)) |
647 |
< |
return; |
646 |
> |
if (m->otype==MAT_SPOT && spotout(r, makespot(m))) |
647 |
> |
return(1); |
648 |
|
/* get distribution pattern */ |
649 |
|
raytexture(r, m->omod); |
650 |
|
/* get source color */ |
653 |
|
m->oargs.farg[2]); |
654 |
|
/* modify value */ |
655 |
|
multcolor(r->rcol, r->pcol); |
656 |
+ |
return(1); |
657 |
|
} |