9 |
|
|
10 |
|
#include "ray.h" |
11 |
|
#include "otypes.h" |
12 |
+ |
#include "otspecial.h" |
13 |
|
#include "rtotypes.h" |
14 |
|
#include "source.h" |
15 |
|
#include "random.h" |
16 |
+ |
#include "pmapsrc.h" |
17 |
+ |
#include "pmapmat.h" |
18 |
|
|
16 |
– |
extern double ssampdist; /* scatter sampling distance */ |
17 |
– |
|
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 |
< |
extern OBJREC * /* find an object's actual material */ |
46 |
< |
findmaterial(register OBJREC *o) |
47 |
< |
{ |
48 |
< |
while (!ismaterial(o->otype)) { |
49 |
< |
if (o->otype == MOD_ALIAS && o->oargs.nsargs) { |
50 |
< |
OBJECT aobj; |
51 |
< |
OBJREC *ao; |
52 |
< |
aobj = lastmod(objndx(o), o->oargs.sarg[0]); |
53 |
< |
if (aobj < 0) |
54 |
< |
objerror(o, USER, "bad reference"); |
55 |
< |
ao = objptr(aobj); |
56 |
< |
if (ismaterial(ao->otype)) |
57 |
< |
return(ao); |
58 |
< |
} |
59 |
< |
if (o->omod == OVOID) |
60 |
< |
return(NULL); |
61 |
< |
o = objptr(o->omod); |
62 |
< |
} |
63 |
< |
return(o); /* mixtures will return NULL */ |
64 |
< |
} |
65 |
< |
|
66 |
< |
|
67 |
< |
extern void |
46 |
> |
void |
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 */ |
63 |
|
if (!issurface(o->otype) || o->omod == OVOID) |
64 |
|
continue; |
65 |
|
/* find material */ |
66 |
< |
m = findmaterial(objptr(o->omod)); |
67 |
< |
if (m == NULL || !islight(m->otype)) |
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) |
98 |
< |
continue; /* don't bother */ |
99 |
< |
|
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 |
+ |
maxcntr += !(source[ns].sflags & SSKIP); |
120 |
+ |
} |
121 |
+ |
if (!maxcntr) { |
122 |
+ |
if (!indirect) |
123 |
+ |
error(WARNING, "no light sources found"); |
124 |
+ |
return; /* no direct calculation, it seems */ |
125 |
+ |
} |
126 |
|
#if SHADCACHE |
127 |
+ |
for (ns = 0; ns < nsources; ns++) /* initialize obstructor cache */ |
128 |
|
initobscache(ns); |
129 |
|
#endif |
130 |
< |
if (!(source[ns].sflags & SSKIP)) |
131 |
< |
foundsource++; |
132 |
< |
} |
133 |
< |
if (!foundsource) { |
132 |
< |
error(WARNING, "no light sources found"); |
133 |
< |
return; |
134 |
< |
} |
135 |
< |
markvirtuals(); /* find and add virtual sources */ |
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; |
142 |
< |
return; |
138 |
> |
if ((srccnt != NULL) & (cntord != NULL)) |
139 |
> |
return; |
140 |
|
memerr: |
141 |
|
error(SYSTEM, "out of memory in marksources"); |
142 |
|
} |
143 |
|
|
144 |
|
|
145 |
< |
extern void |
145 |
> |
void |
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) { |
200 |
|
while (nsources--) |
201 |
|
freeobscache(&source[nsources]); |
202 |
|
#endif |
203 |
< |
free((void *)source); |
203 |
> |
free(source); |
204 |
|
source = NULL; |
205 |
|
nsources = 0; |
206 |
|
} |
207 |
+ |
markclip(NULL); |
208 |
|
if (maxcntr <= 0) |
209 |
|
return; |
210 |
< |
free((void *)srccnt); |
210 |
> |
free(srccnt); |
211 |
|
srccnt = NULL; |
212 |
< |
free((void *)cntord); |
212 |
> |
free(cntord); |
213 |
|
cntord = NULL; |
214 |
|
maxcntr = 0; |
215 |
|
} |
216 |
|
|
217 |
|
|
218 |
< |
extern int |
218 |
> |
int |
219 |
|
srcray( /* send a ray to a source, return domega */ |
220 |
< |
register RAY *sr, /* returned source ray */ |
220 |
> |
RAY *sr, /* returned source ray */ |
221 |
|
RAY *r, /* ray which hit object */ |
222 |
|
SRCINDEX *si /* source sample index */ |
223 |
|
) |
224 |
|
{ |
225 |
< |
double d; /* distance to source */ |
226 |
< |
register SRCREC *srcp; |
225 |
> |
double d; /* distance to source */ |
226 |
> |
SRCREC *srcp; |
227 |
|
|
228 |
< |
rayorigin(sr, SHADOW, r, NULL); /* ignore limits */ |
228 |
> |
rayorigin(sr, SHADOW, r, NULL); /* ignore limits */ |
229 |
|
|
230 |
< |
while ((d = nextssamp(sr, si)) != 0.0) { |
231 |
< |
sr->rsrc = si->sn; /* remember source */ |
232 |
< |
srcp = source + si->sn; |
233 |
< |
if (srcp->sflags & SDISTANT) { |
234 |
< |
if (srcp->sflags & SSPOT && spotout(sr, srcp->sl.s)) |
235 |
< |
continue; |
236 |
< |
return(1); /* sample OK */ |
237 |
< |
} |
230 |
> |
if (r == NULL) |
231 |
> |
sr->rmax = 0.0; |
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 |
> |
} |
241 |
|
/* local source */ |
242 |
|
/* check proximity */ |
243 |
< |
if (srcp->sflags & SPROX && d > srcp->sl.prox) |
193 |
< |
continue; |
194 |
< |
/* check angle */ |
195 |
< |
if (srcp->sflags & SSPOT) { |
196 |
< |
if (spotout(sr, srcp->sl.s)) |
243 |
> |
if (srcp->sflags & SPROX && d > srcp->sl.prox) |
244 |
|
continue; |
245 |
+ |
/* check angle */ |
246 |
+ |
if (srcp->sflags & SSPOT) { |
247 |
+ |
if (spotout(sr, srcp->sl.s)) |
248 |
+ |
continue; |
249 |
|
/* adjust solid angle */ |
250 |
< |
si->dom *= d*d; |
251 |
< |
d += srcp->sl.s->flen; |
252 |
< |
si->dom /= d*d; |
250 |
> |
si->dom *= d*d; |
251 |
> |
d += srcp->sl.s->flen; |
252 |
> |
si->dom /= d*d; |
253 |
> |
} |
254 |
> |
return(1); /* sample OK */ |
255 |
|
} |
256 |
< |
return(1); /* sample OK */ |
204 |
< |
} |
205 |
< |
return(0); /* no more samples */ |
256 |
> |
return(0); /* no more samples */ |
257 |
|
} |
258 |
|
|
259 |
|
|
260 |
< |
extern void |
260 |
> |
void |
261 |
|
srcvalue( /* punch ray to source and compute value */ |
262 |
< |
register RAY *r |
262 |
> |
RAY *r |
263 |
|
) |
264 |
|
{ |
265 |
< |
register SRCREC *sp; |
265 |
> |
SRCREC *sp; |
266 |
|
|
267 |
|
sp = &source[r->rsrc]; |
268 |
|
if (sp->sflags & SVIRTUAL) { /* virtual source */ |
301 |
|
|
302 |
|
static int |
303 |
|
transillum( /* check if material is transparent illum */ |
304 |
< |
OBJECT obj |
304 |
> |
OBJREC *m |
305 |
|
) |
306 |
|
{ |
307 |
< |
OBJREC *m = findmaterial(objptr(obj)); |
257 |
< |
|
307 |
> |
m = findmaterial(m); |
308 |
|
if (m == NULL) |
309 |
|
return(1); |
310 |
|
if (m->otype != MAT_ILLUM) |
313 |
|
} |
314 |
|
|
315 |
|
|
316 |
< |
extern int |
316 |
> |
int |
317 |
|
sourcehit( /* check to see if ray hit distant source */ |
318 |
< |
register RAY *r |
318 |
> |
RAY *r |
319 |
|
) |
320 |
|
{ |
321 |
|
int glowsrc = -1; |
322 |
|
int transrc = -1; |
323 |
|
int first, last; |
324 |
< |
register int i; |
324 |
> |
int i; |
325 |
|
|
326 |
|
if (r->rsrc >= 0) { /* check only one if aimed */ |
327 |
|
first = last = r->rsrc; |
337 |
|
*/ |
338 |
|
if (2.*PI*(1. - DOT(source[i].sloc,r->rdir)) > source[i].ss2) |
339 |
|
continue; |
340 |
< |
/* is it the only possibility? */ |
341 |
< |
if (first == last) { |
340 |
> |
/* is it what we aimed for? */ |
341 |
> |
if (i == r->rsrc) { |
342 |
|
r->ro = source[i].so; |
343 |
|
break; |
344 |
|
} |
346 |
|
* If it's a glow or transparent illum, just remember it. |
347 |
|
*/ |
348 |
|
if (source[i].sflags & SSKIP) { |
349 |
< |
glowsrc = i; |
349 |
> |
if (glowsrc < 0) |
350 |
> |
glowsrc = i; |
351 |
|
continue; |
352 |
|
} |
353 |
< |
if (transillum(source[i].so->omod)) { |
354 |
< |
transrc = i; |
353 |
> |
if (transillum(source[i].so)) { |
354 |
> |
if (transrc < 0) |
355 |
> |
transrc = i; |
356 |
|
continue; |
357 |
|
} |
358 |
|
r->ro = source[i].so; /* otherwise, use first hit */ |
370 |
|
return(0); /* nothing usable */ |
371 |
|
} |
372 |
|
/* |
373 |
< |
* Make assignments. |
373 |
> |
* Assign object index |
374 |
|
*/ |
375 |
|
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; |
376 |
|
return(1); |
377 |
|
} |
378 |
|
|
383 |
|
const void *p2 |
384 |
|
) |
385 |
|
{ |
386 |
< |
register const CNTPTR *sc1 = (const CNTPTR *)p1; |
387 |
< |
register const CNTPTR *sc2 = (const CNTPTR *)p2; |
386 |
> |
const CNTPTR *sc1 = (const CNTPTR *)p1; |
387 |
> |
const CNTPTR *sc2 = (const CNTPTR *)p2; |
388 |
|
|
389 |
|
if (sc1->brt > sc2->brt) |
390 |
|
return(-1); |
394 |
|
} |
395 |
|
|
396 |
|
|
397 |
< |
extern void |
397 |
> |
void |
398 |
|
direct( /* add direct component */ |
399 |
|
RAY *r, /* ray that hit surface */ |
400 |
|
srcdirf_t *f, /* direct component coefficient function */ |
401 |
|
void *p /* data for f */ |
402 |
|
) |
403 |
|
{ |
404 |
< |
register int sn; |
405 |
< |
register CONTRIB *scp; |
404 |
> |
int sn; |
405 |
> |
CONTRIB *scp; |
406 |
|
SRCINDEX si; |
407 |
|
int nshadcheck, ncnts; |
408 |
|
int nhits; |
409 |
|
double prob, ourthresh, hwt; |
410 |
|
RAY sr; |
411 |
+ |
|
412 |
+ |
/* PMAP: Factor in direct photons (primarily for debugging/validation) */ |
413 |
+ |
if (directPhotonMapping) { |
414 |
+ |
(*f)(r -> rcol, p, r -> ron, PI); |
415 |
+ |
multDirectPmap(r); |
416 |
+ |
return; |
417 |
+ |
} |
418 |
|
/* NOTE: srccnt and cntord global so no recursion */ |
419 |
< |
if (nsources <= 0) |
420 |
< |
return; /* no sources?! */ |
421 |
< |
/* potential contributions */ |
422 |
< |
initsrcindex(&si); |
419 |
> |
if (maxcntr <= 0) |
420 |
> |
return; /* no direct?! */ |
421 |
> |
|
422 |
> |
initsrcindex(&si); /* potential contributions */ |
423 |
|
for (sn = 0; srcray(&sr, r, &si); sn++) { |
424 |
|
if (sn >= maxcntr) { |
425 |
|
maxcntr = sn + MAXSPART; |
433 |
|
cntord[sn].sndx = sn; |
434 |
|
scp = srccnt + sn; |
435 |
|
scp->sno = sr.rsrc; |
436 |
< |
/* compute coefficient */ |
384 |
< |
(*f)(scp->coef, p, sr.rdir, si.dom); |
385 |
< |
cntord[sn].brt = bright(scp->coef); |
386 |
< |
if (cntord[sn].brt <= 0.0) |
387 |
< |
continue; |
388 |
< |
#if SHADCACHE |
389 |
< |
/* check shadow cache */ |
436 |
> |
#if SHADCACHE /* check shadow cache */ |
437 |
|
if (si.np == 1 && srcblocked(&sr)) { |
438 |
< |
cntord[sn].brt = 0.0; |
438 |
> |
cntord[sn].brt = 0.0; /* & count as test */ |
439 |
> |
if (source[scp->sno].ntests++ > 0xfffffff0) { |
440 |
> |
source[scp->sno].ntests >>= 1; |
441 |
> |
source[scp->sno].nhits >>= 1; |
442 |
> |
} |
443 |
|
continue; |
444 |
|
} |
445 |
|
#endif |
446 |
+ |
/* compute coefficient */ |
447 |
+ |
(*f)(scp->coef, p, sr.rdir, si.dom); |
448 |
+ |
cntord[sn].brt = sintens(scp->coef); |
449 |
+ |
if (cntord[sn].brt <= 0.0) |
450 |
+ |
continue; |
451 |
|
VCOPY(scp->dir, sr.rdir); |
452 |
< |
copycolor(sr.rcoef, scp->coef); |
452 |
> |
copyscolor(sr.rcoef, scp->coef); |
453 |
|
/* compute potential */ |
454 |
|
sr.revf = srcvalue; |
455 |
|
rayvalue(&sr); |
456 |
< |
multcolor(sr.rcol, sr.rcoef); |
457 |
< |
copycolor(scp->val, sr.rcol); |
458 |
< |
cntord[sn].brt = bright(scp->val); |
456 |
> |
smultscolor(sr.rcol, sr.rcoef); |
457 |
> |
copyscolor(scp->val, sr.rcol); |
458 |
> |
cntord[sn].brt = pbright(sr.rcol); |
459 |
|
} |
460 |
|
/* sort contributions */ |
461 |
|
qsort(cntord, sn, sizeof(CNTPTR), cntcmp); |
462 |
|
{ /* find last */ |
463 |
< |
register int l, m; |
463 |
> |
int l, m; |
464 |
|
|
465 |
|
ncnts = l = sn; |
466 |
|
sn = 0; |
487 |
|
(double)source[scp->sno].ntests, |
488 |
|
sn++) { |
489 |
|
/* check threshold */ |
490 |
< |
if ((sn+nshadcheck>=ncnts ? cntord[sn].brt : |
490 |
> |
if (sn >= MINSHADCNT && |
491 |
> |
(sn+nshadcheck>=ncnts ? cntord[sn].brt : |
492 |
|
cntord[sn].brt-cntord[sn+nshadcheck].brt) |
493 |
< |
< ourthresh*bright(r->rcol)) |
493 |
> |
< ourthresh*pbright(r->rcol)) |
494 |
|
break; |
495 |
|
scp = srccnt + cntord[sn].sndx; |
496 |
|
/* test for hit */ |
497 |
< |
rayorigin(&sr, SHADOW, r, scp->coef); |
497 |
> |
rayorigin(&sr, thrudir(r,scp->dir) ? TSHADOW : RSHADOW, r, NULL); |
498 |
> |
copyscolor(sr.rcoef, scp->coef); |
499 |
|
VCOPY(sr.rdir, scp->dir); |
500 |
|
sr.rsrc = scp->sno; |
501 |
|
/* keep statistics */ |
510 |
|
raycont(&sr); |
511 |
|
if (trace != NULL) |
512 |
|
(*trace)(&sr); /* trace execution */ |
513 |
< |
rayparticipate(&sr); |
456 |
< |
if (bright(sr.rcol) <= FTINY) { |
513 |
> |
if (scolor_mean(sr.rcol) <= FTINY) { |
514 |
|
#if SHADCACHE |
515 |
|
if ((scp <= srccnt || scp[-1].sno != scp->sno) |
516 |
|
&& (scp >= srccnt+ncnts-1 || |
519 |
|
#endif |
520 |
|
continue; /* missed! */ |
521 |
|
} |
522 |
< |
multcolor(sr.rcol, sr.rcoef); |
523 |
< |
copycolor(scp->val, sr.rcol); |
522 |
> |
rayparticipate(&sr); |
523 |
> |
smultscolor(sr.rcol, sr.rcoef); |
524 |
> |
copyscolor(scp->val, sr.rcol); |
525 |
|
} else if (trace != NULL && |
526 |
|
(source[scp->sno].sflags & (SDISTANT|SVIRTUAL|SFOLLOW)) |
527 |
|
== (SDISTANT|SFOLLOW) && |
530 |
|
/* skip call to rayparticipate() & scp->val update */ |
531 |
|
} |
532 |
|
/* add contribution if hit */ |
533 |
< |
addcolor(r->rcol, scp->val); |
533 |
> |
saddscolor(r->rcol, scp->val); |
534 |
|
nhits++; |
535 |
|
source[scp->sno].nhits++; |
536 |
|
} |
550 |
|
prob = hwt * (double)source[scp->sno].nhits / |
551 |
|
(double)source[scp->sno].ntests; |
552 |
|
if (prob < 1.0) |
553 |
< |
scalecolor(scp->val, prob); |
554 |
< |
addcolor(r->rcol, scp->val); |
553 |
> |
scalescolor(scp->val, prob); |
554 |
> |
saddscolor(r->rcol, scp->val); |
555 |
|
} |
556 |
|
} |
557 |
|
|
558 |
|
|
559 |
< |
extern void |
559 |
> |
void |
560 |
|
srcscatter( /* compute source scattering into ray */ |
561 |
< |
register RAY *r |
561 |
> |
RAY *r |
562 |
|
) |
563 |
|
{ |
564 |
|
int oldsampndx; |
570 |
|
COLOR cvext; |
571 |
|
int i, j; |
572 |
|
|
573 |
< |
if (r->slights == NULL || r->slights[0] == 0 |
574 |
< |
|| r->gecc >= 1.-FTINY || r->rot >= FHUGE) |
573 |
> |
if (r->rot >= FHUGE*.99 || r->gecc >= 1.-FTINY) |
574 |
> |
return; /* this can never work */ |
575 |
> |
/* PMAP: do unconditional inscattering for volume photons */ |
576 |
> |
if (!volumePhotonMapping && (r->slights == NULL || r->slights[0] == 0)) |
577 |
|
return; |
578 |
+ |
|
579 |
|
if (ssampdist <= FTINY || (nsamps = r->rot/ssampdist + .5) < 1) |
580 |
|
nsamps = 1; |
581 |
|
#if MAXSSAMP |
584 |
|
#endif |
585 |
|
oldsampndx = samplendx; |
586 |
|
samplendx = random()&0x7fff; /* randomize */ |
587 |
< |
for (i = r->slights[0]; i > 0; i--) { /* for each source */ |
587 |
> |
for (i = volumePhotonMapping ? 1 : r->slights[0]; i > 0; i--) { |
588 |
> |
/* for each source OR once if volume photon map enabled */ |
589 |
|
for (j = 0; j < nsamps; j++) { /* for each sample position */ |
590 |
|
samplendx++; |
591 |
|
t = r->rot * (j+frandom())/nsamps; |
596 |
|
setcolor(cvext, re > 92. ? 0. : exp(-re), |
597 |
|
ge > 92. ? 0. : exp(-ge), |
598 |
|
be > 92. ? 0. : exp(-be)); |
599 |
< |
if (intens(cvext) <= FTINY) |
599 |
> |
if (intens(cvext) <= FTINY*FTINY) |
600 |
|
break; /* too far away */ |
601 |
|
sr.rorg[0] = r->rorg[0] + r->rdir[0]*t; |
602 |
|
sr.rorg[1] = r->rorg[1] + r->rdir[1]*t; |
603 |
|
sr.rorg[2] = r->rorg[2] + r->rdir[2]*t; |
604 |
< |
sr.rmax = 0.; |
605 |
< |
initsrcindex(&si); /* sample ray to this source */ |
606 |
< |
si.sn = r->slights[i]; |
607 |
< |
nopart(&si, &sr); |
608 |
< |
if (!srcray(&sr, NULL, &si) || |
609 |
< |
sr.rsrc != r->slights[i]) |
610 |
< |
continue; /* no path */ |
604 |
> |
|
605 |
> |
if (!volumePhotonMapping) { |
606 |
> |
if (srcskip(r->slights[i], r)) |
607 |
> |
continue; |
608 |
> |
initsrcindex(&si); /* sample ray to this source */ |
609 |
> |
si.sn = r->slights[i]; |
610 |
> |
nopart(&si, &sr); |
611 |
> |
if (!srcray(&sr, NULL, &si) || |
612 |
> |
sr.rsrc != r->slights[i]) |
613 |
> |
continue; /* no path */ |
614 |
|
#if SHADCACHE |
615 |
< |
if (srcblocked(&sr)) /* check shadow cache */ |
616 |
< |
continue; |
615 |
> |
if (srcblocked(&sr)) /* check shadow cache */ |
616 |
> |
continue; |
617 |
|
#endif |
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) { |
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 (pbright(sr.rcol) <= FTINY) { |
624 |
|
#if SHADCACHE |
625 |
< |
srcblocker(&sr); /* add blocker to cache */ |
625 |
> |
srcblocker(&sr); /* add blocker to cache */ |
626 |
|
#endif |
627 |
< |
continue; |
628 |
< |
} |
629 |
< |
if (r->gecc <= FTINY) /* compute P(theta) */ |
630 |
< |
d = 1.; |
631 |
< |
else { |
632 |
< |
d = DOT(r->rdir, sr.rdir); |
633 |
< |
d = 1. + r->gecc*r->gecc - 2.*r->gecc*d; |
634 |
< |
d = (1. - r->gecc*r->gecc) / (d*sqrt(d)); |
635 |
< |
} |
627 |
> |
continue; |
628 |
> |
} |
629 |
> |
if (r->gecc <= FTINY) /* compute P(theta) */ |
630 |
> |
d = 1.; |
631 |
> |
else { |
632 |
> |
d = DOT(r->rdir, sr.rdir); |
633 |
> |
d = 1. + r->gecc*r->gecc - 2.*r->gecc*d; |
634 |
> |
d = (1. - r->gecc*r->gecc) / (d*sqrt(d)); |
635 |
> |
} |
636 |
|
/* other factors */ |
637 |
< |
d *= si.dom * r->rot / (4.*PI*nsamps); |
638 |
< |
multcolor(sr.rcol, r->cext); |
639 |
< |
multcolor(sr.rcol, r->albedo); |
640 |
< |
scalecolor(sr.rcol, d); |
641 |
< |
multcolor(sr.rcol, cvext); |
642 |
< |
addcolor(r->rcol, sr.rcol); /* add it in */ |
637 |
> |
d *= si.dom * r->rot / (4.*PI*nsamps); |
638 |
> |
scalescolor(sr.rcol, d); |
639 |
> |
} else { |
640 |
> |
/* PMAP: Add ambient inscattering from |
641 |
> |
* volume photons; note we reverse the |
642 |
> |
* incident ray direction since we're |
643 |
> |
* now in *backward* raytracing mode! */ |
644 |
> |
sr.rdir [0] = -r -> rdir [0]; |
645 |
> |
sr.rdir [1] = -r -> rdir [1]; |
646 |
> |
sr.rdir [2] = -r -> rdir [2]; |
647 |
> |
sr.gecc = r -> gecc; |
648 |
> |
inscatterVolumePmap(&sr, sr.rcol); |
649 |
> |
scalescolor(sr.rcol, r -> rot / nsamps); |
650 |
> |
} |
651 |
> |
smultcolor(sr.rcol, r->cext); |
652 |
> |
smultcolor(sr.rcol, r->albedo); |
653 |
> |
smultcolor(sr.rcol, cvext); |
654 |
> |
saddscolor(r->rcol, sr.rcol); /* add it in */ |
655 |
|
} |
656 |
|
} |
657 |
|
samplendx = oldsampndx; |
675 |
|
*/ |
676 |
|
|
677 |
|
static int |
678 |
< |
weaksrcmat(OBJECT obj) /* identify material */ |
678 |
> |
weaksrcmat(OBJREC *m) /* identify material */ |
679 |
|
{ |
680 |
< |
OBJREC *m = findmaterial(objptr(obj)); |
604 |
< |
|
680 |
> |
m = findmaterial(m); |
681 |
|
if (m == NULL) return(0); |
682 |
|
return((m->otype==MAT_ILLUM) | (m->otype==MAT_GLOW)); |
683 |
|
} |
684 |
|
|
685 |
|
#define illumblock(m, r) (!(source[r->rsrc].sflags&SVIRTUAL) && \ |
686 |
|
r->rod > 0.0 && \ |
687 |
< |
weaksrcmat(source[r->rsrc].so->omod)) |
687 |
> |
weaksrcmat(source[r->rsrc].so)) |
688 |
|
|
689 |
|
/* wrongsource * |
690 |
|
* |
715 |
|
* The same is true for stray specular samples, since the specular |
716 |
|
* contribution from light sources is calculated separately. |
717 |
|
*/ |
718 |
< |
|
719 |
< |
#define badcomponent(m, r) (r->crtype&(AMBIENT|SPECULAR) && \ |
718 |
> |
/* PMAP: Also avoid counting sources via transferred ambient rays (e.g. |
719 |
> |
* through glass) when photon mapping is enabled, as these indirect |
720 |
> |
* components are already accounted for. |
721 |
> |
*/ |
722 |
> |
#define badcomponent(m, r) (srcRayInPmap(r) || \ |
723 |
> |
(r->crtype&(AMBIENT|SPECULAR) && \ |
724 |
|
!(r->crtype&SHADOW || r->rod < 0.0 || \ |
725 |
< |
/* not 100% correct */ distglow(m, r, r->rot))) |
725 |
> |
/* not 100% correct */ distglow(m, r, r->rot)))) |
726 |
|
|
727 |
|
/* passillum * |
728 |
|
* |
744 |
|
distglow(m, r, raydist(r,PRIMARY))) |
745 |
|
|
746 |
|
|
747 |
< |
extern int |
747 |
> |
int |
748 |
|
m_light( /* ray hit a light source */ |
749 |
< |
register OBJREC *m, |
750 |
< |
register RAY *r |
749 |
> |
OBJREC *m, |
750 |
> |
RAY *r |
751 |
|
) |
752 |
|
{ |
753 |
|
/* check for over-counting */ |
754 |
|
if (badcomponent(m, r)) { |
755 |
< |
setcolor(r->rcoef, 0.0, 0.0, 0.0); |
755 |
> |
scolorblack(r->rcoef); |
756 |
|
return(1); |
757 |
|
} |
758 |
|
if (wrongsource(m, r)) { |
759 |
< |
setcolor(r->rcoef, 0.0, 0.0, 0.0); |
759 |
> |
scolorblack(r->rcoef); |
760 |
|
return(1); |
761 |
|
} |
762 |
|
/* check for passed illum */ |
768 |
|
} |
769 |
|
/* check for invisibility */ |
770 |
|
if (srcignore(m, r)) { |
771 |
< |
setcolor(r->rcoef, 0.0, 0.0, 0.0); |
771 |
> |
scolorblack(r->rcoef); |
772 |
|
return(1); |
773 |
|
} |
774 |
|
/* otherwise treat as source */ |
775 |
< |
/* check for behind */ |
776 |
< |
if (r->rod < 0.0) |
775 |
> |
if (r->rod < 0.0) { /* check for behind */ |
776 |
> |
if (!backvis) |
777 |
> |
raytrans(r); /* used to return black */ |
778 |
|
return(1); |
779 |
+ |
} |
780 |
|
/* check for outside spot */ |
781 |
|
if (m->otype==MAT_SPOT && spotout(r, makespot(m))) |
782 |
|
return(1); |
783 |
|
/* get distribution pattern */ |
784 |
|
raytexture(r, m->omod); |
785 |
|
/* get source color */ |
786 |
< |
setcolor(r->rcol, m->oargs.farg[0], |
786 |
> |
setscolor(r->rcol, m->oargs.farg[0], |
787 |
|
m->oargs.farg[1], |
788 |
|
m->oargs.farg[2]); |
789 |
|
/* modify value */ |
790 |
< |
multcolor(r->rcol, r->pcol); |
790 |
> |
smultscolor(r->rcol, r->pcol); |
791 |
|
return(1); |
792 |
|
} |