19 |
|
|
20 |
|
#include "random.h" |
21 |
|
|
22 |
+ |
#define MINSAMPLES 16 /* minimum number of pretest samples */ |
23 |
+ |
#define STESTMAX 32 /* maximum seeks per sample */ |
24 |
|
|
25 |
+ |
|
26 |
|
double getdisk(); |
27 |
|
|
28 |
|
static OBJECT *vobject; /* virtual source objects */ |
41 |
|
o = objptr(i); |
42 |
|
if (!issurface(o->otype) || o->omod == OVOID) |
43 |
|
continue; |
44 |
< |
if (!isvlight(objptr(o->omod)->otype)) |
44 |
> |
if (!isvlight(vsmaterial(o)->otype)) |
45 |
|
continue; |
46 |
|
if (sfun[o->otype].of == NULL || |
47 |
< |
sfun[o->otype].of->getpleq == NULL) |
48 |
< |
objerror(o, USER, "illegal material"); |
47 |
> |
sfun[o->otype].of->getpleq == NULL) { |
48 |
> |
objerror(o,WARNING,"secondary sources not supported"); |
49 |
> |
continue; |
50 |
> |
} |
51 |
|
if (nvobjects == 0) |
52 |
|
vobject = (OBJECT *)malloc(sizeof(OBJECT)); |
53 |
|
else |
101 |
|
if (o == source[sn].so) /* objects cannot project themselves */ |
102 |
|
return; |
103 |
|
/* get virtual source material */ |
104 |
< |
vsmat = sfun[objptr(o->omod)->otype].mf; |
104 |
> |
vsmat = sfun[vsmaterial(o)->otype].mf; |
105 |
|
/* project virtual sources */ |
106 |
|
for (i = 0; i < vsmat->nproj; i++) |
107 |
|
if ((*vsmat->vproj)(proj, o, &source[sn], i)) |
108 |
|
if ((ns = makevsrc(o, sn, proj)) >= 0) { |
109 |
+ |
source[ns].sa.sv.pn = i; |
110 |
|
#ifdef DEBUG |
111 |
|
virtverb(ns, stderr); |
112 |
|
#endif |
115 |
|
} |
116 |
|
|
117 |
|
|
118 |
+ |
OBJREC * |
119 |
+ |
vsmaterial(o) /* get virtual source material pointer */ |
120 |
+ |
OBJREC *o; |
121 |
+ |
{ |
122 |
+ |
register int i; |
123 |
+ |
register OBJREC *m; |
124 |
+ |
|
125 |
+ |
i = o->omod; |
126 |
+ |
m = objptr(i); |
127 |
+ |
if (m->otype != MAT_ILLUM || m->oargs.nsargs < 1 || |
128 |
+ |
!strcmp(m->oargs.sarg[0], VOIDID) || |
129 |
+ |
(i = modifier(m->oargs.sarg[0])) < 0) |
130 |
+ |
return(m); /* direct modifier */ |
131 |
+ |
return(objptr(i)); /* illum alternate */ |
132 |
+ |
} |
133 |
+ |
|
134 |
+ |
|
135 |
|
int |
136 |
|
makevsrc(op, sn, pm) /* make virtual source if reasonable */ |
137 |
|
OBJREC *op; |
138 |
|
register int sn; |
139 |
|
MAT4 pm; |
140 |
|
{ |
141 |
< |
FVECT nsloc, nsnorm, ocent; |
142 |
< |
double maxrad2; |
141 |
> |
FVECT nsloc, nsnorm, ocent, v; |
142 |
> |
double maxrad2, d; |
143 |
|
int nsflags; |
121 |
– |
double d1; |
144 |
|
SPOT theirspot, ourspot; |
145 |
|
register int i; |
146 |
|
|
154 |
|
if (source[sn].sflags & SPROX) |
155 |
|
return(-1); /* should never get here! */ |
156 |
|
multv3(nsloc, source[sn].sloc, pm); |
157 |
+ |
normalize(nsloc); |
158 |
|
VCOPY(ourspot.aim, ocent); |
159 |
|
ourspot.siz = PI*maxrad2; |
160 |
|
ourspot.flen = 0.; |
161 |
|
if (source[sn].sflags & SSPOT) { |
139 |
– |
copystruct(&theirspot, source[sn].sl.s); |
162 |
|
multp3(theirspot.aim, source[sn].sl.s->aim, pm); |
163 |
+ |
/* adjust for source size */ |
164 |
+ |
d = sqrt(dist2(ourspot.aim, theirspot.aim)); |
165 |
+ |
d = sqrt(source[sn].sl.s->siz/PI) + d*source[sn].srad; |
166 |
+ |
theirspot.siz = PI*d*d; |
167 |
+ |
ourspot.flen = theirspot.flen = source[sn].sl.s->flen; |
168 |
+ |
d = ourspot.siz; |
169 |
|
if (!commonbeam(&ourspot, &theirspot, nsloc)) |
170 |
< |
return(-1); /* no overlap */ |
170 |
> |
return(-1); /* no overlap */ |
171 |
> |
if (ourspot.siz < d-FTINY) { /* it shrunk */ |
172 |
> |
d = beamdisk(v, op, &ourspot, nsloc); |
173 |
> |
if (d <= FTINY) |
174 |
> |
return(-1); |
175 |
> |
if (d < maxrad2) { |
176 |
> |
maxrad2 = d; |
177 |
> |
VCOPY(ocent, v); |
178 |
> |
} |
179 |
> |
} |
180 |
|
} |
181 |
|
} else { /* local source */ |
182 |
|
multp3(nsloc, source[sn].sloc, pm); |
183 |
|
for (i = 0; i < 3; i++) |
184 |
|
ourspot.aim[i] = ocent[i] - nsloc[i]; |
185 |
< |
if ((d1 = normalize(ourspot.aim)) == 0.) |
185 |
> |
if ((d = normalize(ourspot.aim)) == 0.) |
186 |
|
return(-1); /* at source!! */ |
187 |
< |
if (source[sn].sflags & SPROX && d1 > source[sn].sl.prox) |
187 |
> |
if (source[sn].sflags & SPROX && d > source[sn].sl.prox) |
188 |
|
return(-1); /* too far away */ |
152 |
– |
ourspot.siz = 2.*PI*(1. - d1/sqrt(d1*d1+maxrad2)); |
189 |
|
ourspot.flen = 0.; |
190 |
+ |
/* adjust for source size */ |
191 |
+ |
d = (sqrt(maxrad2) + source[sn].srad) / d; |
192 |
+ |
if (d < 1.-FTINY) |
193 |
+ |
ourspot.siz = 2.*PI*(1. - sqrt(1.-d*d)); |
194 |
+ |
else |
195 |
+ |
nsflags &= ~SSPOT; |
196 |
|
if (source[sn].sflags & SSPOT) { |
197 |
|
copystruct(&theirspot, source[sn].sl.s); |
198 |
|
multv3(theirspot.aim, source[sn].sl.s->aim, pm); |
199 |
< |
if (!commonspot(&ourspot, &theirspot, nsloc)) |
200 |
< |
return(-1); /* no overlap */ |
201 |
< |
ourspot.flen = theirspot.flen; |
199 |
> |
normalize(theirspot.aim); |
200 |
> |
if (nsflags & SSPOT) { |
201 |
> |
ourspot.flen = theirspot.flen; |
202 |
> |
d = ourspot.siz; |
203 |
> |
if (!commonspot(&ourspot, &theirspot, nsloc)) |
204 |
> |
return(-1); /* no overlap */ |
205 |
> |
} else { |
206 |
> |
nsflags |= SSPOT; |
207 |
> |
copystruct(&ourspot, &theirspot); |
208 |
> |
d = 2.*ourspot.siz; |
209 |
> |
} |
210 |
> |
if (ourspot.siz < d-FTINY) { /* it shrunk */ |
211 |
> |
d = spotdisk(v, op, &ourspot, nsloc); |
212 |
> |
if (d <= FTINY) |
213 |
> |
return(-1); |
214 |
> |
if (d < maxrad2) { |
215 |
> |
maxrad2 = d; |
216 |
> |
VCOPY(ocent, v); |
217 |
> |
} |
218 |
> |
} |
219 |
|
} |
220 |
|
if (source[sn].sflags & SFLAT) { /* behind source? */ |
221 |
|
multv3(nsnorm, source[sn].snorm, pm); |
222 |
< |
if (checkspot(&ourspot, nsnorm) < 0) |
222 |
> |
normalize(nsnorm); |
223 |
> |
if (nsflags & SSPOT && !checkspot(&ourspot, nsnorm)) |
224 |
|
return(-1); |
225 |
|
} |
226 |
|
} |
233 |
|
goto memerr; |
234 |
|
source[i].sflags = nsflags; |
235 |
|
VCOPY(source[i].sloc, nsloc); |
236 |
+ |
multv3(source[i].ss[SU], source[sn].ss[SU], pm); |
237 |
+ |
multv3(source[i].ss[SV], source[sn].ss[SV], pm); |
238 |
|
if (nsflags & SFLAT) |
239 |
|
VCOPY(source[i].snorm, nsnorm); |
240 |
< |
source[i].ss = source[sn].ss; source[i].ss2 = source[sn].ss2; |
241 |
< |
if ((source[i].sl.s = (SPOT *)malloc(sizeof(SPOT))) == NULL) |
242 |
< |
goto memerr; |
243 |
< |
copystruct(source[i].sl.s, &ourspot); |
240 |
> |
else |
241 |
> |
multv3(source[i].ss[SW], source[sn].ss[SW], pm); |
242 |
> |
source[i].srad = source[sn].srad; |
243 |
> |
source[i].ss2 = source[sn].ss2; |
244 |
> |
if (nsflags & SSPOT) { |
245 |
> |
if ((source[i].sl.s = (SPOT *)malloc(sizeof(SPOT))) == NULL) |
246 |
> |
goto memerr; |
247 |
> |
copystruct(source[i].sl.s, &ourspot); |
248 |
> |
} |
249 |
|
if (nsflags & SPROX) |
250 |
|
source[i].sl.prox = source[sn].sl.prox; |
251 |
< |
source[i].sa.svnext = sn; |
251 |
> |
source[i].sa.sv.sn = sn; |
252 |
|
source[i].so = op; |
253 |
|
return(i); |
254 |
|
memerr: |
265 |
|
double rad2, roffs, offs, d, rd, rdoto; |
266 |
|
FVECT rnrm, nrm; |
267 |
|
/* first, use object getdisk function */ |
268 |
< |
rad2 = (*sfun[op->otype].of->getdisk)(oc, op); |
268 |
> |
rad2 = getmaxdisk(oc, op); |
269 |
|
if (!(source[sn].sflags & SVIRTUAL)) |
270 |
|
return(rad2); /* all done for normal source */ |
271 |
|
/* check for correct side of relay surface */ |
272 |
< |
roffs = (*sfun[source[sn].so->otype].of->getpleq)(rnrm, source[sn].so); |
272 |
> |
roffs = getplaneq(rnrm, source[sn].so); |
273 |
|
rd = DOT(rnrm, source[sn].sloc); /* source projection */ |
274 |
|
if (!(source[sn].sflags & SDISTANT)) |
275 |
|
rd -= roffs; |
277 |
|
if ((d > 0.) ^ (rd > 0.)) |
278 |
|
return(rad2); /* OK if opposite sides */ |
279 |
|
if (d*d >= rad2) |
280 |
< |
return(.0); /* no relay is possible */ |
280 |
> |
return(0.); /* no relay is possible */ |
281 |
|
/* we need a closer look */ |
282 |
< |
offs = (*sfun[op->otype].of->getpleq)(nrm, op); |
282 |
> |
offs = getplaneq(nrm, op); |
283 |
|
rdoto = DOT(rnrm, nrm); |
284 |
|
if (d*d >= rad2*(1.-rdoto*rdoto)) |
285 |
|
return(0.); /* disk entirely on projection side */ |
299 |
|
RAY sr; |
300 |
|
FVECT onorm; |
301 |
|
FVECT offsdir; |
302 |
+ |
SRCINDEX si; |
303 |
|
double or, d; |
304 |
|
int infront; |
305 |
< |
int ssn; |
306 |
< |
int nok, nhit; |
305 |
> |
int stestlim, ssn; |
306 |
> |
int nhit, nok; |
307 |
|
register int i, n; |
308 |
|
/* return if pretesting disabled */ |
309 |
|
if (vspretest <= 0) |
310 |
|
return(f); |
311 |
|
/* get surface normal */ |
312 |
< |
(*sfun[o->otype].of->getpleq)(onorm, o); |
312 |
> |
getplaneq(onorm, o); |
313 |
|
/* set number of rays to sample */ |
314 |
|
if (source[sn].sflags & SDISTANT) { |
315 |
< |
n = (2./3.*PI*PI)*or2/(thescene.cusize*thescene.cusize)* |
316 |
< |
vspretest + .5; |
315 |
> |
/* 32. == heuristic constant */ |
316 |
> |
n = 32.*or2/(thescene.cusize*thescene.cusize)*vspretest + .5; |
317 |
|
infront = DOT(onorm, source[sn].sloc) > 0.; |
318 |
|
} else { |
251 |
– |
n = or2/dist2(oc,source[sn].sloc)*vspretest + .5; |
319 |
|
for (i = 0; i < 3; i++) |
320 |
|
offsdir[i] = source[sn].sloc[i] - oc[i]; |
321 |
+ |
d = DOT(offsdir,offsdir); |
322 |
+ |
if (d <= FTINY) |
323 |
+ |
n = 2.*PI * vspretest + .5; |
324 |
+ |
else |
325 |
+ |
n = 2.*PI * (1.-sqrt(1./(1.+or2/d)))*vspretest + .5; |
326 |
|
infront = DOT(onorm, offsdir) > 0.; |
327 |
|
} |
328 |
< |
if (n < 1) n = 1; |
328 |
> |
if (n < MINSAMPLES) n = MINSAMPLES; |
329 |
> |
#ifdef DEBUG |
330 |
> |
fprintf(stderr, "pretesting source %d in object %s with %d rays\n", |
331 |
> |
sn, o->oname, n); |
332 |
> |
#endif |
333 |
|
/* sample */ |
334 |
|
or = sqrt(or2); |
335 |
< |
ssn = 7*n; |
335 |
> |
stestlim = n*STESTMAX; |
336 |
> |
ssn = 0; |
337 |
|
nhit = nok = 0; |
338 |
|
while (n-- > 0) { |
339 |
|
/* get sample point */ |
340 |
|
do { |
341 |
< |
if (--ssn < 0) |
341 |
> |
if (ssn >= stestlim) { |
342 |
> |
#ifdef DEBUG |
343 |
> |
fprintf(stderr, "\ttoo hard to hit\n"); |
344 |
> |
#endif |
345 |
|
return(f); /* too small a target! */ |
346 |
+ |
} |
347 |
+ |
multisamp(offsdir, 3, urand(sn*931+5827+ssn)); |
348 |
|
for (i = 0; i < 3; i++) |
349 |
< |
offsdir[i] = or*(1. - |
350 |
< |
2.*urand(931*i+5827+ssn)); |
349 |
> |
offsdir[i] = or*(1. - 2.*offsdir[i]); |
350 |
> |
ssn++; |
351 |
|
for (i = 0; i < 3; i++) |
352 |
|
sr.rorg[i] = oc[i] + offsdir[i]; |
353 |
|
d = DOT(offsdir,onorm); |
364 |
|
rayorigin(&sr, NULL, PRIMARY, 1.0); |
365 |
|
} while (!(*ofun[o->otype].funp)(o, &sr)); |
366 |
|
/* check against source */ |
367 |
+ |
initsrcindex(&si); |
368 |
+ |
si.sn = sn; |
369 |
+ |
nopart(&si, &sr); |
370 |
|
samplendx++; |
371 |
< |
if (srcray(&sr, NULL, sn) == 0.0) |
371 |
> |
if (!srcray(&sr, NULL, &si) || sr.rsrc != sn) |
372 |
|
continue; |
373 |
|
sr.revf = srcvalue; |
374 |
|
rayvalue(&sr); |
376 |
|
continue; |
377 |
|
nok++; |
378 |
|
/* check against obstructions */ |
379 |
< |
srcray(&sr, NULL, sn); |
379 |
> |
rayclear(&sr); |
380 |
> |
sr.revf = raytrace; |
381 |
|
rayvalue(&sr); |
382 |
< |
if (bright(sr.rcol) <= FTINY) |
383 |
< |
continue; |
384 |
< |
nhit++; |
382 |
> |
if (bright(sr.rcol) > FTINY) |
383 |
> |
nhit++; |
384 |
> |
if (nhit > 0 && nhit < nok) { |
385 |
> |
#ifdef DEBUG |
386 |
> |
fprintf(stderr, "\tpartially occluded\n"); |
387 |
> |
#endif |
388 |
> |
return(f); /* need to shadow test */ |
389 |
> |
} |
390 |
|
} |
391 |
< |
/* interpret results */ |
392 |
< |
if (nhit == 0) |
391 |
> |
if (nhit == 0) { |
392 |
> |
#ifdef DEBUG |
393 |
> |
fprintf(stderr, "\t0%% hit rate\n"); |
394 |
> |
#endif |
395 |
|
return(f | SSKIP); /* 0% hit rate: totally occluded */ |
396 |
< |
if (nhit == nok) |
397 |
< |
return(f & ~SFOLLOW); /* 100% hit rate: no occlusion */ |
398 |
< |
return(f); /* no comment */ |
396 |
> |
} |
397 |
> |
#ifdef DEBUG |
398 |
> |
fprintf(stderr, "\t100%% hit rate\n"); |
399 |
> |
#endif |
400 |
> |
return(f & ~SFOLLOW); /* 100% hit rate: no occlusion */ |
401 |
|
} |
402 |
|
|
403 |
|
|
415 |
|
fprintf(fp, "\tat (%f,%f,%f)\n", |
416 |
|
source[sn].sloc[0], source[sn].sloc[1], source[sn].sloc[2]); |
417 |
|
fprintf(fp, "\tlinked to source %d (%s)\n", |
418 |
< |
source[sn].sa.svnext, source[source[sn].sa.svnext].so->oname); |
418 |
> |
source[sn].sa.sv.sn, source[source[sn].sa.sv.sn].so->oname); |
419 |
|
if (source[sn].sflags & SFOLLOW) |
420 |
|
fprintf(fp, "\talways followed\n"); |
421 |
|
else |