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13 |
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#include "ray.h" |
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#include "octree.h" |
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#include "source.h" |
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#include "otypes.h" |
26 |
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|
28 |
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extern double dstrsrc; /* source distribution amount */ |
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extern double shadthresh; /* relative shadow threshold */ |
30 |
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|
31 |
< |
SOURCE srcval[MAXSOURCE]; /* our array of sources */ |
31 |
> |
SRCREC *source = NULL; /* our list of sources */ |
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int nsources = 0; /* the number of sources */ |
33 |
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|
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|
48 |
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|
49 |
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if (m->otype != MAT_LIGHT && |
50 |
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m->otype != MAT_ILLUM && |
51 |
< |
m->otype != MAT_GLOW && |
49 |
< |
m->otype != MAT_SPOT) |
51 |
> |
m->otype != MAT_GLOW) |
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continue; |
53 |
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|
54 |
< |
if (m->oargs.nfargs != (m->otype == MAT_GLOW ? 4 : |
53 |
< |
m->otype == MAT_SPOT ? 7 : 3)) |
54 |
> |
if (m->oargs.nfargs != 3) |
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objerror(m, USER, "bad # arguments"); |
56 |
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|
57 |
< |
if (m->otype == MAT_GLOW && |
57 |
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o->otype != OBJ_SOURCE && |
58 |
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m->oargs.farg[3] <= FTINY) |
57 |
> |
if (m->otype == MAT_GLOW && o->otype != OBJ_SOURCE) |
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continue; /* don't bother */ |
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|
60 |
< |
if (nsources >= MAXSOURCE) |
61 |
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error(INTERNAL, "too many sources in marksources"); |
60 |
> |
if (source == NULL) |
61 |
> |
source = (SRCREC *)malloc(sizeof(SRCREC)); |
62 |
> |
else |
63 |
> |
source = (SRCREC *)realloc((char *)source, |
64 |
> |
(unsigned)(nsources+1)*sizeof(SRCREC)); |
65 |
> |
if (source == NULL) |
66 |
> |
error(SYSTEM, "out of memory in marksources"); |
67 |
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|
68 |
< |
newsource(&srcval[nsources], o); |
68 |
> |
newsource(&source[nsources], o); |
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|
70 |
< |
if (m->otype == MAT_GLOW) { |
71 |
< |
srcval[nsources].sflags |= SPROX; |
72 |
< |
srcval[nsources].sl.prox = m->oargs.farg[3]; |
69 |
< |
if (o->otype == OBJ_SOURCE) |
70 |
< |
srcval[nsources].sflags |= SSKIP; |
71 |
< |
} else if (m->otype == MAT_SPOT) { |
72 |
< |
srcval[nsources].sflags |= SSPOT; |
73 |
< |
srcval[nsources].sl.s = makespot(m); |
74 |
< |
} |
70 |
> |
if (m->otype == MAT_GLOW) |
71 |
> |
source[nsources].sflags |= SSKIP; |
72 |
> |
|
73 |
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nsources++; |
74 |
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} |
75 |
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} |
76 |
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|
77 |
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|
78 |
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newsource(src, so) /* add a source to the array */ |
79 |
< |
register SOURCE *src; |
79 |
> |
register SRCREC *src; |
80 |
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register OBJREC *so; |
81 |
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{ |
82 |
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double cos(), tan(), sqrt(); |
87 |
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register int i; |
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|
89 |
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src->sflags = 0; |
90 |
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src->nhits = src->ntests = 1; /* start with hit probability = 1 */ |
91 |
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src->so = so; |
92 |
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|
93 |
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switch (so->otype) { |
139 |
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} |
140 |
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|
141 |
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|
143 |
– |
SPOT * |
144 |
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makespot(m) /* make a spotlight */ |
145 |
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register OBJREC *m; |
146 |
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{ |
147 |
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extern double cos(); |
148 |
– |
register SPOT *ns; |
149 |
– |
|
150 |
– |
if ((ns = (SPOT *)malloc(sizeof(SPOT))) == NULL) |
151 |
– |
error(SYSTEM, "out of memory in makespot"); |
152 |
– |
ns->siz = 2.0*PI * (1.0 - cos(PI/180.0/2.0 * m->oargs.farg[3])); |
153 |
– |
VCOPY(ns->aim, m->oargs.farg+4); |
154 |
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if ((ns->flen = normalize(ns->aim)) == 0.0) |
155 |
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objerror(m, USER, "zero focus vector"); |
156 |
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return(ns); |
157 |
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} |
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|
159 |
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|
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double |
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srcray(sr, r, sn) /* send a ray to a source, return domega */ |
144 |
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register RAY *sr; /* returned source ray */ |
151 |
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double d; |
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register int i; |
153 |
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|
154 |
< |
if (srcval[sn].sflags & SSKIP) |
154 |
> |
if (source[sn].sflags & SSKIP) |
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return(0.0); /* skip this source */ |
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|
157 |
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rayorigin(sr, r, SHADOW, 1.0); /* ignore limits */ |
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|
159 |
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sr->rsrc = sn; /* remember source */ |
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/* get source direction */ |
161 |
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if (srcval[sn].sflags & SDISTANT) |
161 |
> |
if (source[sn].sflags & SDISTANT) |
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/* constant direction */ |
163 |
< |
VCOPY(sr->rdir, srcval[sn].sloc); |
163 |
> |
VCOPY(sr->rdir, source[sn].sloc); |
164 |
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else { /* compute direction */ |
165 |
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for (i = 0; i < 3; i++) |
166 |
< |
sr->rdir[i] = srcval[sn].sloc[i] - sr->rorg[i]; |
166 |
> |
sr->rdir[i] = source[sn].sloc[i] - sr->rorg[i]; |
167 |
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|
168 |
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if (srcval[sn].so->otype == OBJ_FACE) |
169 |
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norm = getface(srcval[sn].so)->norm; |
170 |
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else if (srcval[sn].so->otype == OBJ_RING) |
171 |
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norm = getcone(srcval[sn].so,0)->ad; |
168 |
> |
if (source[sn].so->otype == OBJ_FACE) |
169 |
> |
norm = getface(source[sn].so)->norm; |
170 |
> |
else if (source[sn].so->otype == OBJ_RING) |
171 |
> |
norm = getcone(source[sn].so,0)->ad; |
172 |
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|
173 |
< |
if (norm != NULL && (ddot = -DOT(sr->rdir, norm)) <= 0.0) |
173 |
> |
if (norm != NULL && (ddot = -DOT(sr->rdir, norm)) <= FTINY) |
174 |
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return(0.0); /* behind surface! */ |
175 |
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} |
176 |
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if (dstrsrc > FTINY) { |
177 |
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/* distribute source direction */ |
178 |
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for (i = 0; i < 3; i++) |
179 |
< |
vd[i] = dstrsrc * srcval[sn].ss * (1.0 - 2.0*frandom()); |
179 |
> |
vd[i] = dstrsrc * source[sn].ss * (1.0 - 2.0*frandom()); |
180 |
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|
181 |
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if (norm != NULL) { /* project offset */ |
182 |
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d = DOT(vd, norm); |
186 |
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for (i = 0; i < 3; i++) /* offset source direction */ |
187 |
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sr->rdir[i] += vd[i]; |
188 |
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|
189 |
< |
} else if (srcval[sn].sflags & SDISTANT) |
189 |
> |
} else if (source[sn].sflags & SDISTANT) |
190 |
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/* already normalized */ |
191 |
< |
return(srcval[sn].ss2); |
191 |
> |
return(source[sn].ss2); |
192 |
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|
193 |
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if ((d = normalize(sr->rdir)) == 0.0) |
194 |
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/* at source! */ |
195 |
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return(0.0); |
196 |
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|
197 |
< |
if (srcval[sn].sflags & SDISTANT) |
197 |
> |
if (source[sn].sflags & SDISTANT) |
198 |
|
/* domega constant */ |
199 |
< |
return(srcval[sn].ss2); |
199 |
> |
return(source[sn].ss2); |
200 |
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|
201 |
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else { |
220 |
– |
/* check proximity */ |
221 |
– |
if (srcval[sn].sflags & SPROX && |
222 |
– |
d > srcval[sn].sl.prox) |
223 |
– |
return(0.0); |
202 |
|
|
203 |
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if (norm != NULL) |
204 |
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ddot /= d; |
205 |
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else |
206 |
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ddot = 1.0; |
229 |
– |
/* check angle */ |
230 |
– |
if (srcval[sn].sflags & SSPOT) { |
231 |
– |
if (srcval[sn].sl.s->siz < 2.0*PI * |
232 |
– |
(1.0 + DOT(srcval[sn].sl.s->aim,sr->rdir))) |
233 |
– |
return(0.0); |
234 |
– |
d += srcval[sn].sl.s->flen; |
235 |
– |
} |
207 |
|
/* return domega */ |
208 |
< |
return(ddot*srcval[sn].ss2/(d*d)); |
208 |
> |
return(ddot*source[sn].ss2/(d*d)); |
209 |
|
} |
210 |
|
} |
211 |
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|
222 |
|
first = 0; last = nsources-1; |
223 |
|
} |
224 |
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for (i = first; i <= last; i++) |
225 |
< |
if (srcval[i].sflags & SDISTANT) |
225 |
> |
if (source[i].sflags & SDISTANT) |
226 |
|
/* |
227 |
|
* Check to see if ray is within |
228 |
|
* solid angle of source. |
229 |
|
*/ |
230 |
< |
if (2.0*PI * (1.0 - DOT(srcval[i].sloc,r->rdir)) |
231 |
< |
<= srcval[i].ss2) { |
232 |
< |
r->ro = srcval[i].so; |
233 |
< |
if (!(srcval[i].sflags & SSKIP)) |
230 |
> |
if (2.0*PI * (1.0 - DOT(source[i].sloc,r->rdir)) |
231 |
> |
<= source[i].ss2) { |
232 |
> |
r->ro = source[i].so; |
233 |
> |
if (!(source[i].sflags & SSKIP)) |
234 |
|
break; |
235 |
|
} |
236 |
|
|
238 |
|
for (i = 0; i < 3; i++) |
239 |
|
r->ron[i] = -r->rdir[i]; |
240 |
|
r->rod = 1.0; |
241 |
+ |
r->rofs = 1.0; setident4(r->rofx); |
242 |
+ |
r->robs = 1.0; setident4(r->robx); |
243 |
|
return(1); |
244 |
|
} |
245 |
|
return(0); |
246 |
|
} |
247 |
|
|
248 |
|
|
249 |
+ |
static int |
250 |
+ |
cntcmp(sc1, sc2) /* contribution compare (descending) */ |
251 |
+ |
register CONTRIB *sc1, *sc2; |
252 |
+ |
{ |
253 |
+ |
if (sc1->brt > sc2->brt) |
254 |
+ |
return(-1); |
255 |
+ |
if (sc1->brt < sc2->brt) |
256 |
+ |
return(1); |
257 |
+ |
return(0); |
258 |
+ |
} |
259 |
+ |
|
260 |
+ |
|
261 |
+ |
direct(r, f, p) /* add direct component */ |
262 |
+ |
RAY *r; /* ray that hit surface */ |
263 |
+ |
int (*f)(); /* direct component coefficient function */ |
264 |
+ |
char *p; /* data for f */ |
265 |
+ |
{ |
266 |
+ |
register int sn; |
267 |
+ |
register CONTRIB *srccnt; |
268 |
+ |
double dtmp, hwt, test2, hit2; |
269 |
+ |
RAY sr; |
270 |
+ |
|
271 |
+ |
if ((srccnt = (CONTRIB *)malloc(nsources*sizeof(CONTRIB))) == NULL) |
272 |
+ |
error(SYSTEM, "out of memory in direct"); |
273 |
+ |
/* potential contributions */ |
274 |
+ |
for (sn = 0; sn < nsources; sn++) { |
275 |
+ |
srccnt[sn].sno = sn; |
276 |
+ |
setcolor(srccnt[sn].val, 0.0, 0.0, 0.0); |
277 |
+ |
/* get source ray */ |
278 |
+ |
if ((srccnt[sn].dom = srcray(&sr, r, sn)) == 0.0) |
279 |
+ |
continue; |
280 |
+ |
VCOPY(srccnt[sn].dir, sr.rdir); |
281 |
+ |
/* compute coefficient */ |
282 |
+ |
(*f)(srccnt[sn].val, p, srccnt[sn].dir, srccnt[sn].dom); |
283 |
+ |
srccnt[sn].brt = intens(srccnt[sn].val); |
284 |
+ |
if (srccnt[sn].brt <= FTINY) |
285 |
+ |
continue; |
286 |
+ |
/* compute intersection */ |
287 |
+ |
if (!( source[sn].sflags & SDISTANT ? |
288 |
+ |
sourcehit(&sr) : |
289 |
+ |
(*ofun[source[sn].so->otype].funp) |
290 |
+ |
(source[sn].so, &sr) )) |
291 |
+ |
continue; |
292 |
+ |
/* compute contribution */ |
293 |
+ |
rayshade(&sr, sr.ro->omod); |
294 |
+ |
multcolor(srccnt[sn].val, sr.rcol); |
295 |
+ |
srccnt[sn].brt = intens(srccnt[sn].val); |
296 |
+ |
} |
297 |
+ |
/* sort contributions */ |
298 |
+ |
qsort(srccnt, nsources, sizeof(CONTRIB), cntcmp); |
299 |
+ |
hit2 = test2 = 0.0; |
300 |
+ |
/* test for shadows */ |
301 |
+ |
for (sn = 0; sn < nsources; sn++) { |
302 |
+ |
/* check threshold */ |
303 |
+ |
if (srccnt[sn].brt <= shadthresh*intens(r->rcol)/r->rweight) |
304 |
+ |
break; |
305 |
+ |
/* get statistics */ |
306 |
+ |
hwt = (double)source[srccnt[sn].sno].nhits / |
307 |
+ |
(double)source[srccnt[sn].sno].ntests; |
308 |
+ |
test2 += hwt; |
309 |
+ |
source[srccnt[sn].sno].ntests++; |
310 |
+ |
/* test for hit */ |
311 |
+ |
rayorigin(&sr, r, SHADOW, 1.0); |
312 |
+ |
VCOPY(sr.rdir, srccnt[sn].dir); |
313 |
+ |
if (localhit(&sr, &thescene) && |
314 |
+ |
sr.ro != source[srccnt[sn].sno].so) { |
315 |
+ |
/* check for transmission */ |
316 |
+ |
if (sr.clipset != NULL && inset(sr.clipset,sr.ro->omod)) |
317 |
+ |
raytrans(&sr); /* object is clipped */ |
318 |
+ |
else |
319 |
+ |
rayshade(&sr, sr.ro->omod); |
320 |
+ |
if (intens(sr.rcol) <= FTINY) |
321 |
+ |
continue; /* missed! */ |
322 |
+ |
(*f)(srccnt[sn].val, p, srccnt[sn].dir, srccnt[sn].dom); |
323 |
+ |
multcolor(srccnt[sn].val, sr.rcol); |
324 |
+ |
} |
325 |
+ |
/* add contribution if hit */ |
326 |
+ |
addcolor(r->rcol, srccnt[sn].val); |
327 |
+ |
hit2 += hwt; |
328 |
+ |
source[srccnt[sn].sno].nhits++; |
329 |
+ |
} |
330 |
+ |
if (test2 > FTINY) /* weighted hit rate */ |
331 |
+ |
hwt = hit2 / test2; |
332 |
+ |
else |
333 |
+ |
hwt = 0.0; |
334 |
+ |
#ifdef DEBUG |
335 |
+ |
fprintf(stderr, "%d tested, %f hit rate\n", sn, hwt); |
336 |
+ |
#endif |
337 |
+ |
/* add in untested sources */ |
338 |
+ |
for ( ; sn < nsources; sn++) { |
339 |
+ |
if (srccnt[sn].brt <= 0.0) |
340 |
+ |
break; |
341 |
+ |
dtmp = hwt * (double)source[srccnt[sn].sno].nhits / |
342 |
+ |
(double)source[srccnt[sn].sno].ntests; |
343 |
+ |
scalecolor(srccnt[sn].val, dtmp); |
344 |
+ |
addcolor(r->rcol, srccnt[sn].val); |
345 |
+ |
} |
346 |
+ |
|
347 |
+ |
free(srccnt); |
348 |
+ |
} |
349 |
+ |
|
350 |
+ |
|
351 |
|
#define wrongsource(m, r) (m->otype!=MAT_ILLUM && \ |
352 |
|
r->rsrc>=0 && \ |
353 |
< |
srcval[r->rsrc].so!=r->ro) |
353 |
> |
source[r->rsrc].so!=r->ro) |
354 |
|
|
355 |
|
#define badambient(m, r) ((r->crtype&(AMBIENT|SHADOW))==AMBIENT && \ |
356 |
< |
!(r->rtype&REFLECTED) && /* hack! */\ |
282 |
< |
!(m->otype==MAT_GLOW&&r->rot>m->oargs.farg[3])) |
356 |
> |
!(r->rtype&REFLECTED)) /* hack! */ |
357 |
|
|
358 |
|
#define passillum(m, r) (m->otype==MAT_ILLUM && \ |
359 |
< |
!(r->rsrc>=0&&srcval[r->rsrc].so==r->ro)) |
359 |
> |
!(r->rsrc>=0&&source[r->rsrc].so==r->ro)) |
360 |
|
|
361 |
|
|
362 |
|
m_light(m, r) /* ray hit a light source */ |