19 |
|
|
20 |
|
#include "random.h" |
21 |
|
|
22 |
+ |
#define MINSAMPLES 16 /* minimum number of pretest samples */ |
23 |
+ |
#define STESTMAX 32 /* maximum seeks per sample */ |
24 |
|
|
23 |
– |
#define DISKTFRAC 0.25 /* disk area pretest fraction */ |
25 |
|
|
26 |
|
double getdisk(); |
27 |
|
|
44 |
|
if (!isvlight(objptr(o->omod)->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 |
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 |
121 |
|
register int sn; |
122 |
|
MAT4 pm; |
123 |
|
{ |
124 |
< |
FVECT nsloc, nsnorm, ocent; |
125 |
< |
double maxrad2; |
124 |
> |
FVECT nsloc, nsnorm, ocent, v; |
125 |
> |
double maxrad2, d; |
126 |
|
int nsflags; |
123 |
– |
double d1; |
127 |
|
SPOT theirspot, ourspot; |
128 |
|
register int i; |
129 |
|
|
137 |
|
if (source[sn].sflags & SPROX) |
138 |
|
return(-1); /* should never get here! */ |
139 |
|
multv3(nsloc, source[sn].sloc, pm); |
140 |
+ |
normalize(nsloc); |
141 |
|
VCOPY(ourspot.aim, ocent); |
142 |
|
ourspot.siz = PI*maxrad2; |
143 |
|
ourspot.flen = 0.; |
144 |
|
if (source[sn].sflags & SSPOT) { |
141 |
– |
copystruct(&theirspot, source[sn].sl.s); |
145 |
|
multp3(theirspot.aim, source[sn].sl.s->aim, pm); |
146 |
+ |
d = sqrt(dist2(ourspot.aim, theirspot.aim)); |
147 |
+ |
d = sqrt(source[sn].sl.s->siz/PI) + d*source[sn].ss; |
148 |
+ |
theirspot.siz = PI*d*d; |
149 |
+ |
ourspot.flen = theirspot.flen = source[sn].sl.s->flen; |
150 |
+ |
d = ourspot.siz; |
151 |
|
if (!commonbeam(&ourspot, &theirspot, nsloc)) |
152 |
< |
return(-1); /* no overlap */ |
152 |
> |
return(-1); /* no overlap */ |
153 |
> |
if (ourspot.siz < d-FTINY) { /* it shrunk */ |
154 |
> |
d = beamdisk(v, op, &ourspot, nsloc); |
155 |
> |
if (d <= FTINY) |
156 |
> |
return(-1); |
157 |
> |
if (d < maxrad2) { |
158 |
> |
maxrad2 = d; |
159 |
> |
VCOPY(ocent, v); |
160 |
> |
} |
161 |
> |
} |
162 |
|
} |
163 |
|
} else { /* local source */ |
164 |
|
multp3(nsloc, source[sn].sloc, pm); |
165 |
|
for (i = 0; i < 3; i++) |
166 |
|
ourspot.aim[i] = ocent[i] - nsloc[i]; |
167 |
< |
if ((d1 = normalize(ourspot.aim)) == 0.) |
167 |
> |
if ((d = normalize(ourspot.aim)) == 0.) |
168 |
|
return(-1); /* at source!! */ |
169 |
< |
if (source[sn].sflags & SPROX && d1 > source[sn].sl.prox) |
169 |
> |
if (source[sn].sflags & SPROX && d > source[sn].sl.prox) |
170 |
|
return(-1); /* too far away */ |
154 |
– |
ourspot.siz = 2.*PI*(1. - d1/sqrt(d1*d1+maxrad2)); |
171 |
|
ourspot.flen = 0.; |
172 |
+ |
d = (sqrt(maxrad2) + source[sn].ss) / d; |
173 |
+ |
if (d < 1.-FTINY) |
174 |
+ |
ourspot.siz = 2.*PI*(1. - sqrt(1.-d*d)); |
175 |
+ |
else |
176 |
+ |
nsflags &= ~SSPOT; |
177 |
|
if (source[sn].sflags & SSPOT) { |
178 |
|
copystruct(&theirspot, source[sn].sl.s); |
179 |
|
multv3(theirspot.aim, source[sn].sl.s->aim, pm); |
180 |
< |
if (!commonspot(&ourspot, &theirspot, nsloc)) |
181 |
< |
return(-1); /* no overlap */ |
182 |
< |
ourspot.flen = theirspot.flen; |
180 |
> |
normalize(theirspot.aim); |
181 |
> |
if (nsflags & SSPOT) { |
182 |
> |
ourspot.flen = theirspot.flen; |
183 |
> |
d = ourspot.siz; |
184 |
> |
if (!commonspot(&ourspot, &theirspot, nsloc)) |
185 |
> |
return(-1); /* no overlap */ |
186 |
> |
} else { |
187 |
> |
nsflags |= SSPOT; |
188 |
> |
copystruct(&ourspot, &theirspot); |
189 |
> |
d = 2.*ourspot.siz; |
190 |
> |
} |
191 |
> |
if (ourspot.siz < d-FTINY) { /* it shrunk */ |
192 |
> |
d = spotdisk(v, op, &ourspot, nsloc); |
193 |
> |
if (d <= FTINY) |
194 |
> |
return(-1); |
195 |
> |
if (d < maxrad2) { |
196 |
> |
maxrad2 = d; |
197 |
> |
VCOPY(ocent, v); |
198 |
> |
} |
199 |
> |
} |
200 |
|
} |
201 |
|
if (source[sn].sflags & SFLAT) { /* behind source? */ |
202 |
|
multv3(nsnorm, source[sn].snorm, pm); |
203 |
< |
if (checkspot(&ourspot, nsnorm) < 0) |
203 |
> |
normalize(nsnorm); |
204 |
> |
if (nsflags & SSPOT && !checkspot(&ourspot, nsnorm)) |
205 |
|
return(-1); |
206 |
|
} |
207 |
|
} |
217 |
|
if (nsflags & SFLAT) |
218 |
|
VCOPY(source[i].snorm, nsnorm); |
219 |
|
source[i].ss = source[sn].ss; source[i].ss2 = source[sn].ss2; |
220 |
< |
if ((source[i].sl.s = (SPOT *)malloc(sizeof(SPOT))) == NULL) |
221 |
< |
goto memerr; |
222 |
< |
copystruct(source[i].sl.s, &ourspot); |
220 |
> |
if (nsflags & SSPOT) { |
221 |
> |
if ((source[i].sl.s = (SPOT *)malloc(sizeof(SPOT))) == NULL) |
222 |
> |
goto memerr; |
223 |
> |
copystruct(source[i].sl.s, &ourspot); |
224 |
> |
} |
225 |
|
if (nsflags & SPROX) |
226 |
|
source[i].sl.prox = source[sn].sl.prox; |
227 |
< |
source[i].sa.svnext = sn; |
227 |
> |
source[i].sa.sv.sn = sn; |
228 |
|
source[i].so = op; |
229 |
|
return(i); |
230 |
|
memerr: |
241 |
|
double rad2, roffs, offs, d, rd, rdoto; |
242 |
|
FVECT rnrm, nrm; |
243 |
|
/* first, use object getdisk function */ |
244 |
< |
rad2 = (*sfun[op->otype].of->getdisk)(oc, op); |
244 |
> |
rad2 = getmaxdisk(oc, op); |
245 |
|
if (!(source[sn].sflags & SVIRTUAL)) |
246 |
|
return(rad2); /* all done for normal source */ |
247 |
|
/* check for correct side of relay surface */ |
248 |
< |
roffs = (*sfun[source[sn].so->otype].of->getpleq)(rnrm, source[sn].so); |
248 |
> |
roffs = getplaneq(rnrm, source[sn].so); |
249 |
|
rd = DOT(rnrm, source[sn].sloc); /* source projection */ |
250 |
|
if (!(source[sn].sflags & SDISTANT)) |
251 |
|
rd -= roffs; |
253 |
|
if ((d > 0.) ^ (rd > 0.)) |
254 |
|
return(rad2); /* OK if opposite sides */ |
255 |
|
if (d*d >= rad2) |
256 |
< |
return(.0); /* no relay is possible */ |
256 |
> |
return(0.); /* no relay is possible */ |
257 |
|
/* we need a closer look */ |
258 |
< |
offs = (*sfun[op->otype].of->getpleq)(nrm, op); |
258 |
> |
offs = getplaneq(nrm, op); |
259 |
|
rdoto = DOT(rnrm, nrm); |
260 |
|
if (d*d >= rad2*(1.-rdoto*rdoto)) |
261 |
|
return(0.); /* disk entirely on projection side */ |
276 |
|
FVECT onorm; |
277 |
|
FVECT offsdir; |
278 |
|
double or, d; |
279 |
< |
int nok, nhit; |
279 |
> |
int infront; |
280 |
> |
int stestlim, ssn; |
281 |
> |
int nhit, nok; |
282 |
|
register int i, n; |
283 |
|
/* return if pretesting disabled */ |
284 |
|
if (vspretest <= 0) |
285 |
|
return(f); |
286 |
|
/* get surface normal */ |
287 |
< |
(*sfun[o->otype].of->getpleq)(onorm, o); |
287 |
> |
getplaneq(onorm, o); |
288 |
|
/* set number of rays to sample */ |
289 |
< |
if (source[sn].sflags & SDISTANT) |
290 |
< |
n = (2./3.*PI*PI)*or2/(thescene.cusize*thescene.cusize)* |
291 |
< |
vspretest + .5; |
292 |
< |
else |
293 |
< |
n = or2/dist2(oc,source[sn].sloc)*vspretest + .5; |
294 |
< |
if (n < 1) n = 1; |
295 |
< |
/* limit tests to central region */ |
296 |
< |
or = DISKTFRAC*sqrt(or2); |
289 |
> |
if (source[sn].sflags & SDISTANT) { |
290 |
> |
n = 4.*or2/(thescene.cusize*thescene.cusize)*vspretest + .5; |
291 |
> |
infront = DOT(onorm, source[sn].sloc) > 0.; |
292 |
> |
} else { |
293 |
> |
for (i = 0; i < 3; i++) |
294 |
> |
offsdir[i] = source[sn].sloc[i] - oc[i]; |
295 |
> |
d = DOT(offsdir,offsdir); |
296 |
> |
if (d <= FTINY) |
297 |
> |
n = 2.*PI * vspretest + .5; |
298 |
> |
else |
299 |
> |
n = 2.*PI * (1.-sqrt(1./(1.+or2/d)))*vspretest + .5; |
300 |
> |
infront = DOT(onorm, offsdir) > 0.; |
301 |
> |
} |
302 |
> |
if (n < MINSAMPLES) n = MINSAMPLES; |
303 |
> |
#ifdef DEBUG |
304 |
> |
fprintf(stderr, "pretesting source %d in object %s with %d rays\n", |
305 |
> |
sn, o->oname, n); |
306 |
> |
#endif |
307 |
|
/* sample */ |
308 |
+ |
or = sqrt(or2); |
309 |
+ |
stestlim = n*STESTMAX; |
310 |
+ |
ssn = 0; |
311 |
|
nhit = nok = 0; |
312 |
|
while (n-- > 0) { |
313 |
< |
samplendx++; |
314 |
< |
/* |
315 |
< |
* We're being real sloppy with our sample locations here. |
316 |
< |
*/ |
317 |
< |
for (i = 0; i < 3; i++) |
318 |
< |
offsdir[i] = or*(1. - 2.*urand(931*i+5821+n)); |
319 |
< |
d = DOT(offsdir,onorm); |
320 |
< |
for (i = 0; i < 3; i++) |
321 |
< |
sr.rorg[i] = oc[i] + (1.-d)*offsdir[i]; |
313 |
> |
/* get sample point */ |
314 |
> |
do { |
315 |
> |
if (ssn >= stestlim) { |
316 |
> |
#ifdef DEBUG |
317 |
> |
fprintf(stderr, "\ttoo hard to hit\n"); |
318 |
> |
#endif |
319 |
> |
return(f); /* too small a target! */ |
320 |
> |
} |
321 |
> |
peano(offsdir, 3, urand(931*i+5827+ssn), .005); |
322 |
> |
for (i = 0; i < 3; i++) |
323 |
> |
offsdir[i] = or*(1. - 2.*offsdir[i]); |
324 |
> |
ssn++; |
325 |
> |
for (i = 0; i < 3; i++) |
326 |
> |
sr.rorg[i] = oc[i] + offsdir[i]; |
327 |
> |
d = DOT(offsdir,onorm); |
328 |
> |
if (infront) |
329 |
> |
for (i = 0; i < 3; i++) { |
330 |
> |
sr.rorg[i] -= (d-.0001)*onorm[i]; |
331 |
> |
sr.rdir[i] = -onorm[i]; |
332 |
> |
} |
333 |
> |
else |
334 |
> |
for (i = 0; i < 3; i++) { |
335 |
> |
sr.rorg[i] -= (d+.0001)*onorm[i]; |
336 |
> |
sr.rdir[i] = onorm[i]; |
337 |
> |
} |
338 |
> |
rayorigin(&sr, NULL, PRIMARY, 1.0); |
339 |
> |
} while (!(*ofun[o->otype].funp)(o, &sr)); |
340 |
|
/* check against source */ |
341 |
< |
if (srcray(&sr, NULL, sn) == 0.0) |
341 |
> |
samplendx++; |
342 |
> |
if (srcray(&sr, NULL, sn) == 0.) |
343 |
|
continue; |
344 |
|
sr.revf = srcvalue; |
345 |
|
rayvalue(&sr); |
347 |
|
continue; |
348 |
|
nok++; |
349 |
|
/* check against obstructions */ |
350 |
< |
srcray(&sr, NULL, sn); |
350 |
> |
rayclear(&sr); |
351 |
> |
sr.revf = raytrace; |
352 |
|
rayvalue(&sr); |
353 |
< |
if (bright(sr.rcol) <= FTINY) |
354 |
< |
continue; |
355 |
< |
nhit++; |
353 |
> |
if (bright(sr.rcol) > FTINY) |
354 |
> |
nhit++; |
355 |
> |
if (nhit > 0 && nhit < nok) { |
356 |
> |
#ifdef DEBUG |
357 |
> |
fprintf(stderr, "\tpartially occluded\n"); |
358 |
> |
#endif |
359 |
> |
return(f); /* need to shadow test */ |
360 |
> |
} |
361 |
|
} |
362 |
< |
/* interpret results */ |
363 |
< |
if (nhit == 0) |
362 |
> |
if (nhit == 0) { |
363 |
> |
#ifdef DEBUG |
364 |
> |
fprintf(stderr, "\t0%% hit rate\n"); |
365 |
> |
#endif |
366 |
|
return(f | SSKIP); /* 0% hit rate: totally occluded */ |
367 |
< |
if (nhit == nok) |
368 |
< |
return(f & ~SFOLLOW); /* 100% hit rate: no occlusion */ |
369 |
< |
return(f); /* no comment */ |
367 |
> |
} |
368 |
> |
#ifdef DEBUG |
369 |
> |
fprintf(stderr, "\t100%% hit rate\n"); |
370 |
> |
#endif |
371 |
> |
return(f & ~SFOLLOW); /* 100% hit rate: no occlusion */ |
372 |
|
} |
373 |
|
|
374 |
|
|
386 |
|
fprintf(fp, "\tat (%f,%f,%f)\n", |
387 |
|
source[sn].sloc[0], source[sn].sloc[1], source[sn].sloc[2]); |
388 |
|
fprintf(fp, "\tlinked to source %d (%s)\n", |
389 |
< |
source[sn].sa.svnext, source[source[sn].sa.svnext].so->oname); |
389 |
> |
source[sn].sa.sv.sn, source[source[sn].sa.sv.sn].so->oname); |
390 |
|
if (source[sn].sflags & SFOLLOW) |
391 |
|
fprintf(fp, "\talways followed\n"); |
392 |
|
else |