| 19 |
|
|
| 20 |
|
#include "random.h" |
| 21 |
|
|
| 22 |
+ |
#define MINSAMPLES 5 /* minimum number of pretest samples */ |
| 23 |
+ |
#define STESTMAX 30 /* maximum seeks per sample */ |
| 24 |
|
|
| 25 |
+ |
|
| 26 |
|
double getdisk(); |
| 27 |
|
|
| 28 |
|
static OBJECT *vobject; /* virtual source objects */ |
| 104 |
|
for (i = 0; i < vsmat->nproj; i++) |
| 105 |
|
if ((*vsmat->vproj)(proj, o, &source[sn], i)) |
| 106 |
|
if ((ns = makevsrc(o, sn, proj)) >= 0) { |
| 107 |
+ |
source[ns].sa.sv.pn = i; |
| 108 |
|
#ifdef DEBUG |
| 109 |
|
virtverb(ns, stderr); |
| 110 |
|
#endif |
| 135 |
|
if (source[sn].sflags & SPROX) |
| 136 |
|
return(-1); /* should never get here! */ |
| 137 |
|
multv3(nsloc, source[sn].sloc, pm); |
| 138 |
+ |
normalize(nsloc); |
| 139 |
|
VCOPY(ourspot.aim, ocent); |
| 140 |
|
ourspot.siz = PI*maxrad2; |
| 141 |
|
ourspot.flen = 0.; |
| 163 |
|
return(-1); /* at source!! */ |
| 164 |
|
if (source[sn].sflags & SPROX && d > source[sn].sl.prox) |
| 165 |
|
return(-1); /* too far away */ |
| 161 |
– |
ourspot.siz = 2.*PI*(1. - d/sqrt(d*d+maxrad2)); |
| 166 |
|
ourspot.flen = 0.; |
| 167 |
+ |
if (d*d > maxrad2) |
| 168 |
+ |
ourspot.siz = 2.*PI*(1. - sqrt(1.-maxrad2/(d*d))); |
| 169 |
+ |
else |
| 170 |
+ |
nsflags &= ~SSPOT; |
| 171 |
|
if (source[sn].sflags & SSPOT) { |
| 172 |
|
copystruct(&theirspot, source[sn].sl.s); |
| 173 |
|
multv3(theirspot.aim, source[sn].sl.s->aim, pm); |
| 174 |
< |
d = ourspot.siz; |
| 175 |
< |
if (!commonspot(&ourspot, &theirspot, nsloc)) |
| 176 |
< |
return(-1); /* no overlap */ |
| 174 |
> |
normalize(theirspot.aim); |
| 175 |
> |
if (nsflags & SSPOT) { |
| 176 |
> |
ourspot.flen = theirspot.flen; |
| 177 |
> |
d = ourspot.siz; |
| 178 |
> |
if (!commonspot(&ourspot, &theirspot, nsloc)) |
| 179 |
> |
return(-1); /* no overlap */ |
| 180 |
> |
} else { |
| 181 |
> |
nsflags |= SSPOT; |
| 182 |
> |
copystruct(&ourspot, &theirspot); |
| 183 |
> |
d = 2.*ourspot.siz; |
| 184 |
> |
} |
| 185 |
|
if (ourspot.siz < d-FTINY) { /* it shrunk */ |
| 186 |
|
d = spotdisk(v, op, &ourspot, nsloc); |
| 187 |
|
if (d <= FTINY) |
| 191 |
|
VCOPY(ocent, v); |
| 192 |
|
} |
| 193 |
|
} |
| 178 |
– |
ourspot.flen = theirspot.flen; |
| 194 |
|
} |
| 195 |
|
if (source[sn].sflags & SFLAT) { /* behind source? */ |
| 196 |
|
multv3(nsnorm, source[sn].snorm, pm); |
| 197 |
< |
if (checkspot(&ourspot, nsnorm) < 0) |
| 197 |
> |
normalize(nsnorm); |
| 198 |
> |
if (!checkspot(&ourspot, nsnorm)) |
| 199 |
|
return(-1); |
| 200 |
|
} |
| 201 |
|
} |
| 211 |
|
if (nsflags & SFLAT) |
| 212 |
|
VCOPY(source[i].snorm, nsnorm); |
| 213 |
|
source[i].ss = source[sn].ss; source[i].ss2 = source[sn].ss2; |
| 214 |
< |
if ((source[i].sl.s = (SPOT *)malloc(sizeof(SPOT))) == NULL) |
| 215 |
< |
goto memerr; |
| 216 |
< |
copystruct(source[i].sl.s, &ourspot); |
| 214 |
> |
if (nsflags & SSPOT) { |
| 215 |
> |
if ((source[i].sl.s = (SPOT *)malloc(sizeof(SPOT))) == NULL) |
| 216 |
> |
goto memerr; |
| 217 |
> |
copystruct(source[i].sl.s, &ourspot); |
| 218 |
> |
} |
| 219 |
|
if (nsflags & SPROX) |
| 220 |
|
source[i].sl.prox = source[sn].sl.prox; |
| 221 |
< |
source[i].sa.svnext = sn; |
| 221 |
> |
source[i].sa.sv.sn = sn; |
| 222 |
|
source[i].so = op; |
| 223 |
|
return(i); |
| 224 |
|
memerr: |
| 271 |
|
FVECT offsdir; |
| 272 |
|
double or, d; |
| 273 |
|
int infront; |
| 274 |
< |
int ssn; |
| 275 |
< |
int nhit; |
| 274 |
> |
int stestlim, ssn; |
| 275 |
> |
int nhit, nok; |
| 276 |
|
register int i, n; |
| 277 |
|
/* return if pretesting disabled */ |
| 278 |
|
if (vspretest <= 0) |
| 290 |
|
n = or2/DOT(offsdir,offsdir)*vspretest + .5; |
| 291 |
|
infront = DOT(onorm, offsdir) > 0.; |
| 292 |
|
} |
| 293 |
< |
if (n < 1) n = 1; |
| 293 |
> |
if (n < MINSAMPLES) n = MINSAMPLES; |
| 294 |
|
#ifdef DEBUG |
| 295 |
|
fprintf(stderr, "pretesting source %d in object %s with %d rays\n", |
| 296 |
|
sn, o->oname, n); |
| 297 |
|
#endif |
| 298 |
|
/* sample */ |
| 299 |
|
or = sqrt(or2); |
| 300 |
< |
ssn = 25*n; |
| 301 |
< |
nhit = 0; |
| 300 |
> |
stestlim = n*STESTMAX; |
| 301 |
> |
ssn = 0; |
| 302 |
> |
nhit = nok = 0; |
| 303 |
|
while (n-- > 0) { |
| 304 |
|
/* get sample point */ |
| 305 |
|
do { |
| 306 |
< |
if (--ssn < 0) { |
| 306 |
> |
if (ssn >= stestlim) { |
| 307 |
|
#ifdef DEBUG |
| 308 |
|
fprintf(stderr, "\ttoo hard to hit\n"); |
| 309 |
|
#endif |
| 311 |
|
} |
| 312 |
|
for (i = 0; i < 3; i++) |
| 313 |
|
offsdir[i] = or*(1. - |
| 314 |
< |
2.*urand(931*i+5827+ssn)); |
| 314 |
> |
2.*urand(urind(931*i+5827,ssn))); |
| 315 |
> |
ssn++; |
| 316 |
|
for (i = 0; i < 3; i++) |
| 317 |
|
sr.rorg[i] = oc[i] + offsdir[i]; |
| 318 |
|
d = DOT(offsdir,onorm); |
| 336 |
|
rayvalue(&sr); |
| 337 |
|
if (bright(sr.rcol) <= FTINY) |
| 338 |
|
continue; |
| 339 |
+ |
nok++; |
| 340 |
|
/* check against obstructions */ |
| 341 |
< |
srcray(&sr, NULL, sn); |
| 341 |
> |
rayclear(&sr); |
| 342 |
> |
sr.revf = raytrace; |
| 343 |
|
rayvalue(&sr); |
| 344 |
< |
if (bright(sr.rcol) <= FTINY) { |
| 344 |
> |
if (bright(sr.rcol) > FTINY) |
| 345 |
> |
nhit++; |
| 346 |
> |
if (nhit > 0 && nhit < nok) { |
| 347 |
|
#ifdef DEBUG |
| 348 |
< |
fprintf(stderr, "\tfound an occlusion\n"); |
| 348 |
> |
fprintf(stderr, "\tpartially occluded\n"); |
| 349 |
|
#endif |
| 350 |
< |
return(f); /* need to shadow test */ |
| 350 |
> |
return(f); /* need to shadow test */ |
| 351 |
|
} |
| 328 |
– |
nhit++; |
| 352 |
|
} |
| 353 |
|
if (nhit == 0) { |
| 354 |
|
#ifdef DEBUG |
| 377 |
|
fprintf(fp, "\tat (%f,%f,%f)\n", |
| 378 |
|
source[sn].sloc[0], source[sn].sloc[1], source[sn].sloc[2]); |
| 379 |
|
fprintf(fp, "\tlinked to source %d (%s)\n", |
| 380 |
< |
source[sn].sa.svnext, source[source[sn].sa.svnext].so->oname); |
| 380 |
> |
source[sn].sa.sv.sn, source[source[sn].sa.sv.sn].so->oname); |
| 381 |
|
if (source[sn].sflags & SFOLLOW) |
| 382 |
|
fprintf(fp, "\talways followed\n"); |
| 383 |
|
else |
