7 |
|
* External symbols declared in source.h |
8 |
|
*/ |
9 |
|
|
10 |
– |
#include "copyright.h" |
11 |
– |
|
10 |
|
#include "ray.h" |
13 |
– |
|
11 |
|
#include "otypes.h" |
12 |
< |
|
12 |
> |
#include "otspecial.h" |
13 |
> |
#include "rtotypes.h" |
14 |
|
#include "source.h" |
17 |
– |
|
15 |
|
#include "random.h" |
16 |
+ |
#include "pmapsrc.h" |
17 |
+ |
#include "pmapmat.h" |
18 |
|
|
20 |
– |
extern double ssampdist; /* scatter sampling distance */ |
21 |
– |
|
19 |
|
#ifndef MAXSSAMP |
20 |
|
#define MAXSSAMP 16 /* maximum samples per ray */ |
21 |
|
#endif |
27 |
|
typedef struct { |
28 |
|
int sno; /* source number */ |
29 |
|
FVECT dir; /* source direction */ |
30 |
< |
COLOR coef; /* material coefficient */ |
31 |
< |
COLOR val; /* contribution */ |
30 |
> |
SCOLOR coef; /* material coefficient */ |
31 |
> |
SCOLOR val; /* contribution */ |
32 |
|
} CONTRIB; /* direct contribution */ |
33 |
|
|
34 |
|
typedef struct { |
36 |
|
float brt; /* brightness (for comparison) */ |
37 |
|
} CNTPTR; /* contribution pointer */ |
38 |
|
|
39 |
< |
static CONTRIB *srccnt; /* source contributions in direct() */ |
40 |
< |
static CNTPTR *cntord; /* source ordering in direct() */ |
39 |
> |
static CONTRIB *srccnt = NULL; /* source contributions in direct() */ |
40 |
> |
static CNTPTR *cntord = NULL; /* source ordering in direct() */ |
41 |
|
static int maxcntr = 0; /* size of contribution arrays */ |
42 |
|
|
43 |
+ |
static int cntcmp(const void *p1, const void *p2); |
44 |
|
|
45 |
+ |
|
46 |
|
void |
47 |
< |
marksources() /* find and mark source objects */ |
47 |
> |
marksources(void) /* find and mark source objects */ |
48 |
|
{ |
49 |
< |
int foundsource = 0; |
49 |
> |
int indirect = 0; |
50 |
|
int i; |
51 |
< |
register OBJREC *o, *m; |
52 |
< |
register int ns; |
51 |
> |
OBJREC *o, *m; |
52 |
> |
int ns; |
53 |
> |
/* call us only once! */ |
54 |
> |
if (nsources) |
55 |
> |
error(CONSISTENCY, "Multiple calls to marksources!"); |
56 |
|
/* initialize dispatch table */ |
57 |
|
initstypes(); |
58 |
|
/* find direct sources */ |
62 |
|
|
63 |
|
if (!issurface(o->otype) || o->omod == OVOID) |
64 |
|
continue; |
65 |
< |
|
66 |
< |
m = objptr(o->omod); |
67 |
< |
|
66 |
< |
if (!islight(m->otype)) |
65 |
> |
/* find material */ |
66 |
> |
m = findmaterial(o); |
67 |
> |
if (m == NULL) |
68 |
|
continue; |
69 |
+ |
if (m->otype == MAT_CLIP) { |
70 |
+ |
markclip(m); /* special case for antimatter */ |
71 |
+ |
continue; |
72 |
+ |
} |
73 |
+ |
if (!islight(m->otype)) |
74 |
+ |
continue; /* not source modifier */ |
75 |
|
|
76 |
|
if (m->oargs.nfargs != (m->otype == MAT_GLOW ? 4 : |
77 |
|
m->otype == MAT_SPOT ? 7 : 3)) |
78 |
|
objerror(m, USER, "bad # arguments"); |
79 |
|
|
80 |
+ |
if (m->oargs.farg[0] <= FTINY && (m->oargs.farg[1] <= FTINY) & |
81 |
+ |
(m->oargs.farg[2] <= FTINY)) |
82 |
+ |
continue; /* don't bother */ |
83 |
|
if (m->otype == MAT_GLOW && |
84 |
|
o->otype != OBJ_SOURCE && |
85 |
< |
m->oargs.farg[3] <= FTINY) |
86 |
< |
continue; /* don't bother */ |
87 |
< |
if (m->oargs.farg[0] <= FTINY && m->oargs.farg[1] <= FTINY && |
88 |
< |
m->oargs.farg[2] <= FTINY) |
79 |
< |
continue; /* don't bother */ |
80 |
< |
|
85 |
> |
m->oargs.farg[3] <= FTINY) { |
86 |
> |
indirect += (ambounce > 0); |
87 |
> |
continue; /* don't track these */ |
88 |
> |
} |
89 |
|
if (sfun[o->otype].of == NULL || |
90 |
|
sfun[o->otype].of->setsrc == NULL) |
91 |
|
objerror(o, USER, "illegal material"); |
98 |
|
if (m->otype == MAT_GLOW) { |
99 |
|
source[ns].sflags |= SPROX; |
100 |
|
source[ns].sl.prox = m->oargs.farg[3]; |
101 |
< |
if (source[ns].sflags & SDISTANT) |
101 |
> |
if (source[ns].sflags & SDISTANT) { |
102 |
|
source[ns].sflags |= SSKIP; |
103 |
+ |
indirect += (ambounce > 0); |
104 |
+ |
} |
105 |
|
} else if (m->otype == MAT_SPOT) { |
106 |
+ |
if (source[ns].sflags & SDISTANT) |
107 |
+ |
objerror(o, WARNING, |
108 |
+ |
"distant source is a spotlight"); |
109 |
|
source[ns].sflags |= SSPOT; |
110 |
|
if ((source[ns].sl.s = makespot(m)) == NULL) |
111 |
|
goto memerr; |
116 |
|
source[ns].sflags |= SSKIP; |
117 |
|
} |
118 |
|
} |
119 |
< |
if (!(source[ns].sflags & SSKIP)) |
107 |
< |
foundsource++; |
119 |
> |
maxcntr += !(source[ns].sflags & SSKIP); |
120 |
|
} |
121 |
< |
if (!foundsource) { |
122 |
< |
error(WARNING, "no light sources found"); |
123 |
< |
return; |
121 |
> |
if (!maxcntr) { |
122 |
> |
if (!indirect) |
123 |
> |
error(WARNING, "no light sources found"); |
124 |
> |
return; /* no direct calculation, it seems */ |
125 |
|
} |
126 |
< |
markvirtuals(); /* find and add virtual sources */ |
126 |
> |
#if SHADCACHE |
127 |
> |
for (ns = 0; ns < nsources; ns++) /* initialize obstructor cache */ |
128 |
> |
initobscache(ns); |
129 |
> |
#endif |
130 |
> |
/* PMAP: disable virtual sources */ |
131 |
> |
if (!photonMapping) |
132 |
> |
markvirtuals(); /* find and add virtual sources */ |
133 |
> |
|
134 |
|
/* allocate our contribution arrays */ |
135 |
< |
maxcntr = nsources + MAXSPART; /* start with this many */ |
135 |
> |
maxcntr += MAXSPART; /* start with this many */ |
136 |
|
srccnt = (CONTRIB *)malloc(maxcntr*sizeof(CONTRIB)); |
137 |
|
cntord = (CNTPTR *)malloc(maxcntr*sizeof(CNTPTR)); |
138 |
< |
if ((srccnt == NULL) | (cntord == NULL)) |
139 |
< |
goto memerr; |
120 |
< |
return; |
138 |
> |
if ((srccnt != NULL) & (cntord != NULL)) |
139 |
> |
return; |
140 |
|
memerr: |
141 |
|
error(SYSTEM, "out of memory in marksources"); |
142 |
|
} |
143 |
|
|
144 |
|
|
145 |
|
void |
146 |
< |
freesources() /* free all source structures */ |
146 |
> |
distantsources(void) /* only mark distant sources */ |
147 |
|
{ |
148 |
+ |
int i; |
149 |
+ |
OBJREC *o, *m; |
150 |
+ |
int ns; |
151 |
+ |
/* call us only once! */ |
152 |
+ |
if (nsources) |
153 |
+ |
error(CONSISTENCY, "Multiple calls to distantsources!"); |
154 |
+ |
/* initialize dispatch table */ |
155 |
+ |
initstypes(); |
156 |
+ |
/* sources needed for sourcehit() */ |
157 |
+ |
for (i = 0; i < nsceneobjs; i++) { |
158 |
+ |
|
159 |
+ |
o = objptr(i); |
160 |
+ |
|
161 |
+ |
if ((o->otype != OBJ_SOURCE) | (o->omod == OVOID)) |
162 |
+ |
continue; |
163 |
+ |
/* find material */ |
164 |
+ |
m = findmaterial(o); |
165 |
+ |
if (m == NULL) |
166 |
+ |
continue; |
167 |
+ |
if (!islight(m->otype)) |
168 |
+ |
continue; /* not source modifier */ |
169 |
+ |
|
170 |
+ |
if (m->oargs.nfargs != (m->otype == MAT_GLOW ? 4 : |
171 |
+ |
m->otype == MAT_SPOT ? 7 : 3)) |
172 |
+ |
objerror(m, USER, "bad # arguments"); |
173 |
+ |
|
174 |
+ |
if (m->oargs.farg[0] <= FTINY && (m->oargs.farg[1] <= FTINY) & |
175 |
+ |
(m->oargs.farg[2] <= FTINY)) |
176 |
+ |
continue; /* don't bother */ |
177 |
+ |
if (sfun[o->otype].of == NULL || |
178 |
+ |
sfun[o->otype].of->setsrc == NULL) |
179 |
+ |
objerror(o, USER, "illegal material"); |
180 |
+ |
|
181 |
+ |
if ((ns = newsource()) < 0) |
182 |
+ |
error(SYSTEM, "out of memory in distantsources"); |
183 |
+ |
|
184 |
+ |
setsource(&source[ns], o); |
185 |
+ |
|
186 |
+ |
if (m->otype == MAT_GLOW) { |
187 |
+ |
source[ns].sflags |= SPROX|SSKIP; |
188 |
+ |
source[ns].sl.prox = m->oargs.farg[3]; |
189 |
+ |
} else if (m->otype == MAT_SPOT) |
190 |
+ |
objerror(o, WARNING, "distant source is a spotlight"); |
191 |
+ |
} |
192 |
+ |
} |
193 |
+ |
|
194 |
+ |
|
195 |
+ |
void |
196 |
+ |
freesources(void) /* free all source structures */ |
197 |
+ |
{ |
198 |
|
if (nsources > 0) { |
199 |
< |
free((void *)source); |
199 |
> |
#if SHADCACHE |
200 |
> |
while (nsources--) |
201 |
> |
freeobscache(&source[nsources]); |
202 |
> |
#endif |
203 |
> |
#ifdef SSKIPOPT |
204 |
> |
sskip_rsi(NULL); |
205 |
> |
#endif |
206 |
> |
free(source); |
207 |
|
source = NULL; |
208 |
|
nsources = 0; |
209 |
|
} |
210 |
+ |
markclip(NULL); |
211 |
|
if (maxcntr <= 0) |
212 |
|
return; |
213 |
< |
free((void *)srccnt); |
213 |
> |
free(srccnt); |
214 |
|
srccnt = NULL; |
215 |
< |
free((void *)cntord); |
215 |
> |
free(cntord); |
216 |
|
cntord = NULL; |
217 |
|
maxcntr = 0; |
218 |
|
} |
219 |
|
|
220 |
|
|
221 |
|
int |
222 |
< |
srcray(sr, r, si) /* send a ray to a source, return domega */ |
223 |
< |
register RAY *sr; /* returned source ray */ |
224 |
< |
RAY *r; /* ray which hit object */ |
225 |
< |
SRCINDEX *si; /* source sample index */ |
222 |
> |
srcray( /* aim a ray at a source, return domega */ |
223 |
> |
RAY *sr, /* prepared source ray */ |
224 |
> |
RAY *r, /* originating ray (or NULL) */ |
225 |
> |
SRCINDEX *si /* source sample index */ |
226 |
> |
) |
227 |
|
{ |
228 |
< |
double d; /* distance to source */ |
229 |
< |
register SRCREC *srcp; |
228 |
> |
double d; /* distance to source */ |
229 |
> |
SRCREC *srcp; |
230 |
|
|
231 |
< |
rayorigin(sr, r, SHADOW, 1.0); /* ignore limits */ |
231 |
> |
rayorigin(sr, SHADOW, r, NULL); /* ignore limits */ |
232 |
|
|
233 |
< |
while ((d = nextssamp(sr, si)) != 0.0) { |
234 |
< |
sr->rsrc = si->sn; /* remember source */ |
235 |
< |
srcp = source + si->sn; |
236 |
< |
if (srcp->sflags & SDISTANT) { |
237 |
< |
if (srcp->sflags & SSPOT && spotout(sr, srcp->sl.s)) |
238 |
< |
continue; |
239 |
< |
return(1); /* sample OK */ |
240 |
< |
} |
233 |
> |
if (r == NULL) |
234 |
> |
sr->rmax = 0.0; |
235 |
> |
|
236 |
> |
while ((d = nextssamp(sr, si)) != 0.0) { |
237 |
> |
sr->rsrc = si->sn; /* remember source */ |
238 |
> |
srcp = source + si->sn; |
239 |
> |
if (srcp->sflags & SDISTANT) { |
240 |
> |
if (srcp->sflags & SSPOT && spotout(sr, srcp->sl.s)) |
241 |
> |
continue; |
242 |
> |
return(1); /* sample OK */ |
243 |
> |
} |
244 |
|
/* local source */ |
245 |
|
/* check proximity */ |
246 |
< |
if (srcp->sflags & SPROX && d > srcp->sl.prox) |
166 |
< |
continue; |
167 |
< |
/* check angle */ |
168 |
< |
if (srcp->sflags & SSPOT) { |
169 |
< |
if (spotout(sr, srcp->sl.s)) |
246 |
> |
if (srcp->sflags & SPROX && d > srcp->sl.prox) |
247 |
|
continue; |
248 |
+ |
/* check angle */ |
249 |
+ |
if (srcp->sflags & SSPOT) { |
250 |
+ |
if (spotout(sr, srcp->sl.s)) |
251 |
+ |
continue; |
252 |
|
/* adjust solid angle */ |
253 |
< |
si->dom *= d*d; |
254 |
< |
d += srcp->sl.s->flen; |
255 |
< |
si->dom /= d*d; |
253 |
> |
si->dom *= d*d; |
254 |
> |
d += srcp->sl.s->flen; |
255 |
> |
si->dom /= d*d; |
256 |
> |
} |
257 |
> |
return(1); /* sample OK */ |
258 |
|
} |
259 |
< |
return(1); /* sample OK */ |
177 |
< |
} |
178 |
< |
return(0); /* no more samples */ |
259 |
> |
return(0); /* no more samples */ |
260 |
|
} |
261 |
|
|
262 |
|
|
263 |
|
void |
264 |
< |
srcvalue(r) /* punch ray to source and compute value */ |
265 |
< |
register RAY *r; |
264 |
> |
srcvalue( /* punch ray to source and compute value */ |
265 |
> |
RAY *r |
266 |
> |
) |
267 |
|
{ |
268 |
< |
register SRCREC *sp; |
268 |
> |
SRCREC *sp; |
269 |
|
|
270 |
|
sp = &source[r->rsrc]; |
271 |
|
if (sp->sflags & SVIRTUAL) { /* virtual source */ |
302 |
|
} |
303 |
|
|
304 |
|
|
305 |
+ |
static int |
306 |
+ |
transillum( /* check if material is transparent illum */ |
307 |
+ |
OBJREC *m |
308 |
+ |
) |
309 |
+ |
{ |
310 |
+ |
m = findmaterial(m); |
311 |
+ |
if (m == NULL) |
312 |
+ |
return(1); |
313 |
+ |
if (m->otype != MAT_ILLUM) |
314 |
+ |
return(0); |
315 |
+ |
return(!m->oargs.nsargs || !strcmp(m->oargs.sarg[0], VOIDID)); |
316 |
+ |
} |
317 |
+ |
|
318 |
+ |
|
319 |
|
int |
320 |
< |
sourcehit(r) /* check to see if ray hit distant source */ |
321 |
< |
register RAY *r; |
320 |
> |
sourcehit( /* check to see if ray hit distant source */ |
321 |
> |
RAY *r |
322 |
> |
) |
323 |
|
{ |
324 |
+ |
int glowsrc = -1; |
325 |
+ |
int transrc = -1; |
326 |
|
int first, last; |
327 |
< |
register int i; |
327 |
> |
int i; |
328 |
|
|
329 |
|
if (r->rsrc >= 0) { /* check only one if aimed */ |
330 |
|
first = last = r->rsrc; |
331 |
|
} else { /* otherwise check all */ |
332 |
|
first = 0; last = nsources-1; |
333 |
|
} |
334 |
< |
for (i = first; i <= last; i++) |
335 |
< |
if ((source[i].sflags & (SDISTANT|SVIRTUAL)) == SDISTANT) |
336 |
< |
/* |
337 |
< |
* Check to see if ray is within |
338 |
< |
* solid angle of source. |
339 |
< |
*/ |
340 |
< |
if (2.0*PI * (1.0 - DOT(source[i].sloc,r->rdir)) |
341 |
< |
<= source[i].ss2) { |
342 |
< |
r->ro = source[i].so; |
343 |
< |
if (!(source[i].sflags & SSKIP)) |
344 |
< |
break; |
345 |
< |
} |
346 |
< |
|
347 |
< |
if (r->ro != NULL) { |
348 |
< |
r->robj = objndx(r->ro); |
349 |
< |
for (i = 0; i < 3; i++) |
350 |
< |
r->ron[i] = -r->rdir[i]; |
351 |
< |
r->rod = 1.0; |
352 |
< |
r->pert[0] = r->pert[1] = r->pert[2] = 0.0; |
353 |
< |
r->uv[0] = r->uv[1] = 0.0; |
354 |
< |
r->rox = NULL; |
355 |
< |
return(1); |
334 |
> |
for (i = first; i <= last; i++) { |
335 |
> |
if ((source[i].sflags & (SDISTANT|SVIRTUAL)) != SDISTANT) |
336 |
> |
continue; |
337 |
> |
/* |
338 |
> |
* Check to see if ray is within |
339 |
> |
* solid angle of source. |
340 |
> |
*/ |
341 |
> |
if (2.*PI*(1. - DOT(source[i].sloc,r->rdir)) > source[i].ss2) |
342 |
> |
continue; |
343 |
> |
/* is it what we aimed for? */ |
344 |
> |
if (i == r->rsrc) { |
345 |
> |
r->ro = source[i].so; |
346 |
> |
break; |
347 |
> |
} |
348 |
> |
/* |
349 |
> |
* If it's a glow or transparent illum, just remember it. |
350 |
> |
*/ |
351 |
> |
if (source[i].sflags & SSKIP) { |
352 |
> |
if (glowsrc < 0) |
353 |
> |
glowsrc = i; |
354 |
> |
continue; |
355 |
> |
} |
356 |
> |
if (transillum(source[i].so)) { |
357 |
> |
if (transrc < 0) |
358 |
> |
transrc = i; |
359 |
> |
continue; |
360 |
> |
} |
361 |
> |
r->ro = source[i].so; /* otherwise, use first hit */ |
362 |
> |
break; |
363 |
|
} |
364 |
< |
return(0); |
364 |
> |
/* |
365 |
> |
* Do we need fallback? |
366 |
> |
*/ |
367 |
> |
if (r->ro == NULL) { |
368 |
> |
if (transrc >= 0 && r->crtype & (AMBIENT|SPECULAR)) |
369 |
> |
return(0); /* avoid overcounting */ |
370 |
> |
if (glowsrc >= 0) |
371 |
> |
r->ro = source[glowsrc].so; |
372 |
> |
else |
373 |
> |
return(0); /* nothing usable */ |
374 |
> |
} |
375 |
> |
/* |
376 |
> |
* Assign object index |
377 |
> |
*/ |
378 |
> |
r->robj = objndx(r->ro); |
379 |
> |
return(1); |
380 |
|
} |
381 |
|
|
382 |
|
|
383 |
|
static int |
384 |
< |
cntcmp(sc1, sc2) /* contribution compare (descending) */ |
385 |
< |
register CNTPTR *sc1, *sc2; |
384 |
> |
cntcmp( /* contribution compare (descending) */ |
385 |
> |
const void *p1, |
386 |
> |
const void *p2 |
387 |
> |
) |
388 |
|
{ |
389 |
+ |
const CNTPTR *sc1 = (const CNTPTR *)p1; |
390 |
+ |
const CNTPTR *sc2 = (const CNTPTR *)p2; |
391 |
+ |
|
392 |
|
if (sc1->brt > sc2->brt) |
393 |
|
return(-1); |
394 |
|
if (sc1->brt < sc2->brt) |
398 |
|
|
399 |
|
|
400 |
|
void |
401 |
< |
direct(r, f, p) /* add direct component */ |
402 |
< |
RAY *r; /* ray that hit surface */ |
403 |
< |
void (*f)(); /* direct component coefficient function */ |
404 |
< |
char *p; /* data for f */ |
401 |
> |
direct( /* add direct component */ |
402 |
> |
RAY *r, /* ray that hit surface */ |
403 |
> |
srcdirf_t *f, /* direct component coefficient function */ |
404 |
> |
void *p /* data for f */ |
405 |
> |
) |
406 |
|
{ |
407 |
< |
extern void (*trace)(); |
408 |
< |
register int sn; |
282 |
< |
register CONTRIB *scp; |
407 |
> |
int sn; |
408 |
> |
CONTRIB *scp; |
409 |
|
SRCINDEX si; |
410 |
|
int nshadcheck, ncnts; |
411 |
|
int nhits; |
412 |
|
double prob, ourthresh, hwt; |
413 |
|
RAY sr; |
414 |
+ |
|
415 |
+ |
/* PMAP: Factor in direct photons (primarily for debugging/validation) */ |
416 |
+ |
if (directPhotonMapping) { |
417 |
+ |
(*f)(r -> rcol, p, r -> ron, PI); |
418 |
+ |
multDirectPmap(r); |
419 |
+ |
return; |
420 |
+ |
} |
421 |
|
/* NOTE: srccnt and cntord global so no recursion */ |
422 |
< |
if (nsources <= 0) |
423 |
< |
return; /* no sources?! */ |
424 |
< |
/* potential contributions */ |
425 |
< |
initsrcindex(&si); |
422 |
> |
if (maxcntr <= 0) |
423 |
> |
return; /* no direct?! */ |
424 |
> |
|
425 |
> |
initsrcindex(&si); /* potential contributions */ |
426 |
|
for (sn = 0; srcray(&sr, r, &si); sn++) { |
427 |
|
if (sn >= maxcntr) { |
428 |
|
maxcntr = sn + MAXSPART; |
436 |
|
cntord[sn].sndx = sn; |
437 |
|
scp = srccnt + sn; |
438 |
|
scp->sno = sr.rsrc; |
439 |
+ |
#if SHADCACHE /* check shadow cache */ |
440 |
+ |
if (si.np == 1 && srcblocked(&sr)) { |
441 |
+ |
cntord[sn].brt = 0.0; /* & count as test */ |
442 |
+ |
if (source[scp->sno].ntests++ > 0xfffffff0) { |
443 |
+ |
source[scp->sno].ntests >>= 1; |
444 |
+ |
source[scp->sno].nhits >>= 1; |
445 |
+ |
} |
446 |
+ |
continue; |
447 |
+ |
} |
448 |
+ |
#endif |
449 |
|
/* compute coefficient */ |
450 |
|
(*f)(scp->coef, p, sr.rdir, si.dom); |
451 |
< |
cntord[sn].brt = bright(scp->coef); |
451 |
> |
cntord[sn].brt = sintens(scp->coef); |
452 |
|
if (cntord[sn].brt <= 0.0) |
453 |
|
continue; |
454 |
+ |
#ifdef SSKIPOPT |
455 |
+ |
if (ssf_select != NULL && sskip_chk(ssf_select, scp->sno)) |
456 |
+ |
scalescolor(scp->coef, r->scorr); |
457 |
+ |
#endif |
458 |
|
VCOPY(scp->dir, sr.rdir); |
459 |
+ |
copyscolor(sr.rcoef, scp->coef); |
460 |
|
/* compute potential */ |
461 |
|
sr.revf = srcvalue; |
462 |
|
rayvalue(&sr); |
463 |
< |
copycolor(scp->val, sr.rcol); |
464 |
< |
multcolor(scp->val, scp->coef); |
465 |
< |
cntord[sn].brt = bright(scp->val); |
463 |
> |
smultscolor(sr.rcol, sr.rcoef); |
464 |
> |
copyscolor(scp->val, sr.rcol); |
465 |
> |
cntord[sn].brt = pbright(sr.rcol); |
466 |
|
} |
467 |
|
/* sort contributions */ |
468 |
|
qsort(cntord, sn, sizeof(CNTPTR), cntcmp); |
469 |
|
{ /* find last */ |
470 |
< |
register int l, m; |
470 |
> |
int l, m; |
471 |
|
|
472 |
|
ncnts = l = sn; |
473 |
|
sn = 0; |
494 |
|
(double)source[scp->sno].ntests, |
495 |
|
sn++) { |
496 |
|
/* check threshold */ |
497 |
< |
if ((sn+nshadcheck>=ncnts ? cntord[sn].brt : |
497 |
> |
if (sn >= MINSHADCNT && |
498 |
> |
(sn+nshadcheck>=ncnts ? cntord[sn].brt : |
499 |
|
cntord[sn].brt-cntord[sn+nshadcheck].brt) |
500 |
< |
< ourthresh*bright(r->rcol)) |
500 |
> |
< ourthresh*pbright(r->rcol)) |
501 |
|
break; |
502 |
|
scp = srccnt + cntord[sn].sndx; |
503 |
|
/* test for hit */ |
504 |
< |
rayorigin(&sr, r, SHADOW, 1.0); |
504 |
> |
rayorigin(&sr, thrudir(r,scp->dir) ? TSHADOW : RSHADOW, r, NULL); |
505 |
> |
copyscolor(sr.rcoef, scp->coef); |
506 |
|
VCOPY(sr.rdir, scp->dir); |
507 |
|
sr.rsrc = scp->sno; |
508 |
|
/* keep statistics */ |
515 |
|
source[scp->sno].sflags & SFOLLOW )) { |
516 |
|
/* follow entire path */ |
517 |
|
raycont(&sr); |
368 |
– |
rayparticipate(&sr); |
518 |
|
if (trace != NULL) |
519 |
|
(*trace)(&sr); /* trace execution */ |
520 |
< |
if (bright(sr.rcol) <= FTINY) |
520 |
> |
if (scolor_mean(sr.rcol) <= FTINY) { |
521 |
> |
#if SHADCACHE |
522 |
> |
if ((scp <= srccnt || scp[-1].sno != scp->sno) |
523 |
> |
&& (scp >= srccnt+ncnts-1 || |
524 |
> |
scp[1].sno != scp->sno)) |
525 |
> |
srcblocker(&sr); |
526 |
> |
#endif |
527 |
|
continue; /* missed! */ |
528 |
< |
copycolor(scp->val, sr.rcol); |
529 |
< |
multcolor(scp->val, scp->coef); |
528 |
> |
} |
529 |
> |
rayparticipate(&sr); |
530 |
> |
smultscolor(sr.rcol, sr.rcoef); |
531 |
> |
copyscolor(scp->val, sr.rcol); |
532 |
> |
} else if (trace != NULL && |
533 |
> |
(source[scp->sno].sflags & (SDISTANT|SVIRTUAL|SFOLLOW)) |
534 |
> |
== (SDISTANT|SFOLLOW) && |
535 |
> |
sourcehit(&sr) && rayshade(&sr, sr.ro->omod)) { |
536 |
> |
(*trace)(&sr); /* trace execution */ |
537 |
> |
/* skip call to rayparticipate() & scp->val update */ |
538 |
|
} |
539 |
|
/* add contribution if hit */ |
540 |
< |
addcolor(r->rcol, scp->val); |
540 |
> |
saddscolor(r->rcol, scp->val); |
541 |
|
nhits++; |
542 |
|
source[scp->sno].nhits++; |
543 |
|
} |
556 |
|
scp = srccnt + cntord[sn].sndx; |
557 |
|
prob = hwt * (double)source[scp->sno].nhits / |
558 |
|
(double)source[scp->sno].ntests; |
559 |
< |
if (prob > 1.0) |
560 |
< |
prob = 1.0; |
561 |
< |
scalecolor(scp->val, prob); |
399 |
< |
addcolor(r->rcol, scp->val); |
559 |
> |
if (prob < 1.0) |
560 |
> |
scalescolor(scp->val, prob); |
561 |
> |
saddscolor(r->rcol, scp->val); |
562 |
|
} |
563 |
|
} |
564 |
|
|
565 |
|
|
566 |
|
void |
567 |
< |
srcscatter(r) /* compute source scattering into ray */ |
568 |
< |
register RAY *r; |
567 |
> |
srcscatter( /* compute source scattering into ray */ |
568 |
> |
RAY *r |
569 |
> |
) |
570 |
|
{ |
571 |
|
int oldsampndx; |
572 |
|
int nsamps; |
577 |
|
COLOR cvext; |
578 |
|
int i, j; |
579 |
|
|
580 |
< |
if (r->slights == NULL || r->slights[0] == 0 |
581 |
< |
|| r->gecc >= 1.-FTINY || r->rot >= FHUGE) |
580 |
> |
if (r->rot >= FHUGE*.99 || r->gecc >= 1.-FTINY) |
581 |
> |
return; /* this can never work */ |
582 |
> |
/* PMAP: do unconditional inscattering for volume photons */ |
583 |
> |
if (!volumePhotonMapping && (r->slights == NULL || r->slights[0] == 0)) |
584 |
|
return; |
585 |
+ |
|
586 |
|
if (ssampdist <= FTINY || (nsamps = r->rot/ssampdist + .5) < 1) |
587 |
|
nsamps = 1; |
588 |
|
#if MAXSSAMP |
591 |
|
#endif |
592 |
|
oldsampndx = samplendx; |
593 |
|
samplendx = random()&0x7fff; /* randomize */ |
594 |
< |
for (i = r->slights[0]; i > 0; i--) { /* for each source */ |
594 |
> |
for (i = volumePhotonMapping ? 1 : r->slights[0]; i > 0; i--) { |
595 |
> |
/* for each source OR once if volume photon map enabled */ |
596 |
|
for (j = 0; j < nsamps; j++) { /* for each sample position */ |
597 |
|
samplendx++; |
598 |
|
t = r->rot * (j+frandom())/nsamps; |
603 |
|
setcolor(cvext, re > 92. ? 0. : exp(-re), |
604 |
|
ge > 92. ? 0. : exp(-ge), |
605 |
|
be > 92. ? 0. : exp(-be)); |
606 |
< |
if (intens(cvext) <= FTINY) |
606 |
> |
if (intens(cvext) <= FTINY*FTINY) |
607 |
|
break; /* too far away */ |
608 |
|
sr.rorg[0] = r->rorg[0] + r->rdir[0]*t; |
609 |
|
sr.rorg[1] = r->rorg[1] + r->rdir[1]*t; |
610 |
|
sr.rorg[2] = r->rorg[2] + r->rdir[2]*t; |
611 |
< |
sr.rmax = 0.; |
612 |
< |
initsrcindex(&si); /* sample ray to this source */ |
613 |
< |
si.sn = r->slights[i]; |
614 |
< |
nopart(&si, &sr); |
615 |
< |
if (!srcray(&sr, NULL, &si) || |
616 |
< |
sr.rsrc != r->slights[i]) |
617 |
< |
continue; /* no path */ |
618 |
< |
copycolor(sr.cext, r->cext); |
619 |
< |
copycolor(sr.albedo, r->albedo); |
620 |
< |
sr.gecc = r->gecc; |
621 |
< |
sr.slights = r->slights; |
622 |
< |
rayvalue(&sr); /* eval. source ray */ |
623 |
< |
if (bright(sr.rcol) <= FTINY) |
624 |
< |
continue; |
625 |
< |
if (r->gecc <= FTINY) /* compute P(theta) */ |
626 |
< |
d = 1.; |
627 |
< |
else { |
628 |
< |
d = DOT(r->rdir, sr.rdir); |
629 |
< |
d = 1. + r->gecc*r->gecc - 2.*r->gecc*d; |
630 |
< |
d = (1. - r->gecc*r->gecc) / (d*sqrt(d)); |
631 |
< |
} |
611 |
> |
|
612 |
> |
if (!volumePhotonMapping) { |
613 |
> |
sr.parent = r; /* hack for preemptive test */ |
614 |
> |
if (srcskip(r->slights[i], &sr)) |
615 |
> |
continue; |
616 |
> |
initsrcindex(&si); /* sample ray to this source */ |
617 |
> |
si.sn = r->slights[i]; |
618 |
> |
nopart(&si, &sr); |
619 |
> |
if (!srcray(&sr, NULL, &si) || |
620 |
> |
sr.rsrc != r->slights[i]) |
621 |
> |
continue; /* no path */ |
622 |
> |
#if SHADCACHE |
623 |
> |
if (srcblocked(&sr)) /* check shadow cache */ |
624 |
> |
continue; |
625 |
> |
#endif |
626 |
> |
copycolor(sr.cext, r->cext); |
627 |
> |
copycolor(sr.albedo, r->albedo); |
628 |
> |
sr.gecc = r->gecc; |
629 |
> |
sr.slights = r->slights; |
630 |
> |
rayvalue(&sr); /* eval. source ray */ |
631 |
> |
if (pbright(sr.rcol) <= FTINY) { |
632 |
> |
#if SHADCACHE |
633 |
> |
srcblocker(&sr); /* add blocker to cache */ |
634 |
> |
#endif |
635 |
> |
continue; |
636 |
> |
} |
637 |
> |
if (r->gecc <= FTINY) /* compute P(theta) */ |
638 |
> |
d = 1.; |
639 |
> |
else { |
640 |
> |
d = DOT(r->rdir, sr.rdir); |
641 |
> |
d = 1. + r->gecc*r->gecc - 2.*r->gecc*d; |
642 |
> |
d = (1. - r->gecc*r->gecc) / (d*sqrt(d)); |
643 |
> |
} |
644 |
|
/* other factors */ |
645 |
< |
d *= si.dom * r->rot / (4.*PI*nsamps); |
646 |
< |
multcolor(sr.rcol, r->cext); |
647 |
< |
multcolor(sr.rcol, r->albedo); |
648 |
< |
scalecolor(sr.rcol, d); |
649 |
< |
multcolor(sr.rcol, cvext); |
650 |
< |
addcolor(r->rcol, sr.rcol); /* add it in */ |
645 |
> |
d *= si.dom * r->rot / (4.*PI*nsamps); |
646 |
> |
#ifdef SSKIPOPT |
647 |
> |
if (ssf_select != NULL && sskip_chk(ssf_select, sr.rsrc)) |
648 |
> |
d *= r->scorr; |
649 |
> |
#endif |
650 |
> |
scalescolor(sr.rcol, d); |
651 |
> |
} else { |
652 |
> |
/* PMAP: Add ambient inscattering from |
653 |
> |
* volume photons; note we reverse the |
654 |
> |
* incident ray direction since we're |
655 |
> |
* now in *backward* raytracing mode! */ |
656 |
> |
sr.rdir [0] = -r -> rdir [0]; |
657 |
> |
sr.rdir [1] = -r -> rdir [1]; |
658 |
> |
sr.rdir [2] = -r -> rdir [2]; |
659 |
> |
sr.gecc = r -> gecc; |
660 |
> |
inscatterVolumePmap(&sr, sr.rcol); |
661 |
> |
scalescolor(sr.rcol, r -> rot / nsamps); |
662 |
> |
} |
663 |
> |
smultcolor(sr.rcol, r->cext); |
664 |
> |
smultcolor(sr.rcol, r->albedo); |
665 |
> |
smultcolor(sr.rcol, cvext); |
666 |
> |
saddscolor(r->rcol, sr.rcol); /* add it in */ |
667 |
|
} |
668 |
|
} |
669 |
|
samplendx = oldsampndx; |
686 |
|
* geometry behind (or inside) an effective radiator. |
687 |
|
*/ |
688 |
|
|
689 |
< |
static int weaksrcmod(obj) int obj; /* efficiency booster function */ |
690 |
< |
{register OBJREC *o = objptr(obj); |
691 |
< |
return((o->otype==MAT_ILLUM)|(o->otype==MAT_GLOW));} |
689 |
> |
static int |
690 |
> |
weaksrcmat(OBJREC *m) /* identify material */ |
691 |
> |
{ |
692 |
> |
m = findmaterial(m); |
693 |
> |
if (m == NULL) return(0); |
694 |
> |
return((m->otype==MAT_ILLUM) | (m->otype==MAT_GLOW)); |
695 |
> |
} |
696 |
|
|
697 |
|
#define illumblock(m, r) (!(source[r->rsrc].sflags&SVIRTUAL) && \ |
698 |
|
r->rod > 0.0 && \ |
699 |
< |
weaksrcmod(source[r->rsrc].so->omod)) |
699 |
> |
weaksrcmat(source[r->rsrc].so)) |
700 |
|
|
701 |
|
/* wrongsource * |
702 |
|
* |
727 |
|
* The same is true for stray specular samples, since the specular |
728 |
|
* contribution from light sources is calculated separately. |
729 |
|
*/ |
730 |
< |
|
731 |
< |
#define badcomponent(m, r) (r->crtype&(AMBIENT|SPECULAR) && \ |
730 |
> |
/* PMAP: Also avoid counting sources via transferred ambient rays (e.g. |
731 |
> |
* through glass) when photon mapping is enabled, as these indirect |
732 |
> |
* components are already accounted for. |
733 |
> |
*/ |
734 |
> |
#define badcomponent(m, r) (srcRayInPmap(r) || \ |
735 |
> |
(r->crtype&(AMBIENT|SPECULAR) && \ |
736 |
|
!(r->crtype&SHADOW || r->rod < 0.0 || \ |
737 |
< |
/* not 100% correct */ distglow(m, r, r->rot))) |
737 |
> |
/* not 100% correct */ distglow(m, r, r->rot)))) |
738 |
|
|
739 |
|
/* passillum * |
740 |
|
* |
757 |
|
|
758 |
|
|
759 |
|
int |
760 |
< |
m_light(m, r) /* ray hit a light source */ |
761 |
< |
register OBJREC *m; |
762 |
< |
register RAY *r; |
760 |
> |
m_light( /* ray hit a light source */ |
761 |
> |
OBJREC *m, |
762 |
> |
RAY *r |
763 |
> |
) |
764 |
|
{ |
765 |
|
/* check for over-counting */ |
766 |
< |
if (badcomponent(m, r)) |
766 |
> |
if (badcomponent(m, r)) { |
767 |
> |
scolorblack(r->rcoef); |
768 |
|
return(1); |
769 |
< |
if (wrongsource(m, r)) |
769 |
> |
} |
770 |
> |
if (wrongsource(m, r)) { |
771 |
> |
scolorblack(r->rcoef); |
772 |
|
return(1); |
773 |
+ |
} |
774 |
|
/* check for passed illum */ |
775 |
|
if (passillum(m, r)) { |
776 |
|
if (m->oargs.nsargs && strcmp(m->oargs.sarg[0], VOIDID)) |
778 |
|
raytrans(r); |
779 |
|
return(1); |
780 |
|
} |
573 |
– |
/* otherwise treat as source */ |
574 |
– |
/* check for behind */ |
575 |
– |
if (r->rod < 0.0) |
576 |
– |
return(1); |
781 |
|
/* check for invisibility */ |
782 |
< |
if (srcignore(m, r)) |
782 |
> |
if (srcignore(m, r)) { |
783 |
> |
scolorblack(r->rcoef); |
784 |
|
return(1); |
785 |
+ |
} |
786 |
+ |
/* otherwise treat as source */ |
787 |
+ |
if (r->rod < 0.0) { /* check for behind */ |
788 |
+ |
if (!backvis) |
789 |
+ |
raytrans(r); /* used to return black */ |
790 |
+ |
return(1); |
791 |
+ |
} |
792 |
|
/* check for outside spot */ |
793 |
|
if (m->otype==MAT_SPOT && spotout(r, makespot(m))) |
794 |
|
return(1); |
795 |
|
/* get distribution pattern */ |
796 |
|
raytexture(r, m->omod); |
797 |
|
/* get source color */ |
798 |
< |
setcolor(r->rcol, m->oargs.farg[0], |
798 |
> |
setscolor(r->rcol, m->oargs.farg[0], |
799 |
|
m->oargs.farg[1], |
800 |
|
m->oargs.farg[2]); |
801 |
|
/* modify value */ |
802 |
< |
multcolor(r->rcol, r->pcol); |
802 |
> |
smultscolor(r->rcol, r->pcol); |
803 |
|
return(1); |
804 |
|
} |