25 |
|
extern char *shm_boundary; /* memory sharing boundary */ |
26 |
|
|
27 |
|
#ifndef MAXASET |
28 |
< |
#define MAXASET 2047 /* maximum number of elements in ambient set */ |
28 |
> |
#define MAXASET 4095 /* maximum number of elements in ambient set */ |
29 |
|
#endif |
30 |
|
OBJECT ambset[MAXASET+1]={0}; /* ambient include/exclude set */ |
31 |
|
|
140 |
|
setambient(void) /* initialize calculation */ |
141 |
|
{ |
142 |
|
int readonly = 0; |
143 |
< |
long pos, flen; |
143 |
> |
long flen; |
144 |
|
AMBVAL amb; |
145 |
|
/* make sure we're fresh */ |
146 |
|
ambdone(); |
160 |
|
readonly = (ambfp = fopen(ambfile, "r")) != NULL; |
161 |
|
if (ambfp != NULL) { |
162 |
|
initambfile(0); /* file exists */ |
163 |
< |
pos = ftell(ambfp); |
163 |
> |
lastpos = ftell(ambfp); |
164 |
|
while (readambval(&amb, ambfp)) |
165 |
|
avinsert(avstore(&amb)); |
166 |
|
nambshare = nambvals; /* share loaded values */ |
174 |
|
return; /* avoid ambsync() */ |
175 |
|
} |
176 |
|
/* align file pointer */ |
177 |
< |
pos += (long)nambvals*AMBVALSIZ; |
177 |
> |
lastpos += (long)nambvals*AMBVALSIZ; |
178 |
|
flen = lseek(fileno(ambfp), (off_t)0, SEEK_END); |
179 |
< |
if (flen != pos) { |
179 |
> |
if (flen != lastpos) { |
180 |
|
sprintf(errmsg, |
181 |
|
"ignoring last %ld values in ambient file (corrupted)", |
182 |
< |
(flen - pos)/AMBVALSIZ); |
182 |
> |
(flen - lastpos)/AMBVALSIZ); |
183 |
|
error(WARNING, errmsg); |
184 |
< |
fseek(ambfp, pos, 0); |
184 |
> |
fseek(ambfp, lastpos, SEEK_SET); |
185 |
|
#ifndef _WIN32 /* XXX we need a replacement for that one */ |
186 |
< |
ftruncate(fileno(ambfp), (off_t)pos); |
186 |
> |
ftruncate(fileno(ambfp), (off_t)lastpos); |
187 |
|
#endif |
188 |
|
} |
189 |
|
} else if ((ambfp = fopen(ambfile, "w+")) != NULL) { |
190 |
|
initambfile(1); /* else create new file */ |
191 |
+ |
fflush(ambfp); |
192 |
+ |
lastpos = ftell(ambfp); |
193 |
|
} else { |
194 |
|
sprintf(errmsg, "cannot open ambient file \"%s\"", ambfile); |
195 |
|
error(SYSTEM, errmsg); |
196 |
|
} |
197 |
< |
nunflshed++; /* lie */ |
198 |
< |
ambsync(); |
197 |
> |
#ifdef F_SETLKW |
198 |
> |
aflock(F_UNLCK); /* release file */ |
199 |
> |
#endif |
200 |
|
} |
201 |
|
|
202 |
|
|
257 |
|
|
258 |
|
|
259 |
|
extern void |
260 |
< |
ambient( /* compute ambient component for ray */ |
261 |
< |
COLOR acol, |
260 |
> |
multambient( /* compute ambient component & multiply by coef. */ |
261 |
> |
COLOR aval, |
262 |
|
register RAY *r, |
263 |
|
FVECT nrm |
264 |
|
) |
265 |
|
{ |
266 |
|
static int rdepth = 0; /* ambient recursion */ |
267 |
+ |
COLOR acol; |
268 |
|
double d, l; |
269 |
|
|
270 |
|
if (ambdiv <= 0) /* no ambient calculation */ |
278 |
|
goto dumbamb; |
279 |
|
|
280 |
|
if (ambacc <= FTINY) { /* no ambient storage */ |
281 |
+ |
copycolor(acol, aval); |
282 |
|
rdepth++; |
283 |
|
d = doambient(acol, r, r->rweight, NULL, NULL); |
284 |
|
rdepth--; |
285 |
|
if (d <= FTINY) |
286 |
|
goto dumbamb; |
287 |
+ |
copycolor(aval, acol); |
288 |
|
return; |
289 |
|
} |
290 |
|
|
291 |
|
if (tracktime) /* sort to minimize thrashing */ |
292 |
|
sortambvals(0); |
293 |
< |
/* get ambient value */ |
293 |
> |
/* interpolate ambient value */ |
294 |
|
setcolor(acol, 0.0, 0.0, 0.0); |
295 |
|
d = sumambient(acol, r, nrm, rdepth, |
296 |
|
&atrunk, thescene.cuorg, thescene.cusize); |
297 |
|
if (d > FTINY) { |
298 |
< |
scalecolor(acol, 1.0/d); |
298 |
> |
d = 1.0/d; |
299 |
> |
scalecolor(acol, d); |
300 |
> |
multcolor(aval, acol); |
301 |
|
return; |
302 |
|
} |
303 |
|
rdepth++; /* need to cache new value */ |
304 |
|
d = makeambient(acol, r, nrm, rdepth-1); |
305 |
|
rdepth--; |
306 |
< |
if (d > FTINY) |
306 |
> |
if (d > FTINY) { |
307 |
> |
multcolor(aval, acol); /* got new value */ |
308 |
|
return; |
309 |
+ |
} |
310 |
|
dumbamb: /* return global value */ |
311 |
< |
copycolor(acol, ambval); |
312 |
< |
if ((ambvwt <= 0) | (navsum == 0)) |
311 |
> |
if ((ambvwt <= 0) | (navsum == 0)) { |
312 |
> |
multcolor(aval, ambval); |
313 |
|
return; |
314 |
+ |
} |
315 |
|
l = bright(ambval); /* average in computations */ |
316 |
|
if (l > FTINY) { |
317 |
|
d = (log(l)*(double)ambvwt + avsum) / |
318 |
|
(double)(ambvwt + navsum); |
319 |
|
d = exp(d) / l; |
320 |
< |
scalecolor(acol, d); /* apply color of ambval */ |
320 |
> |
scalecolor(aval, d); |
321 |
> |
multcolor(aval, ambval); /* apply color of ambval */ |
322 |
|
} else { |
323 |
|
d = exp( avsum / (double)navsum ); |
324 |
< |
setcolor(acol, d, d, d); /* neutral color */ |
324 |
> |
scalecolor(aval, d); /* neutral color */ |
325 |
|
} |
326 |
|
} |
327 |
|
|
355 |
|
*/ |
356 |
|
if (av->lvl > al) /* list sorted, so this works */ |
357 |
|
break; |
358 |
< |
if (av->weight < r->rweight-FTINY) |
358 |
> |
if (av->weight < 0.9*r->rweight) |
359 |
|
continue; |
360 |
|
/* |
361 |
|
* Ambient radius test. |
434 |
|
break; |
435 |
|
} |
436 |
|
if (j == 3) |
437 |
< |
wsum += sumambient(acol, r, rn, al, at->kid+i, ck0, s); |
437 |
> |
wsum += sumambient(acol, r, rn, al, |
438 |
> |
at->kid+i, ck0, s); |
439 |
|
} |
440 |
|
return(wsum); |
441 |
|
} |
442 |
|
|
443 |
|
|
444 |
|
extern double |
445 |
< |
makeambient( /* make a new ambient value */ |
445 |
> |
makeambient( /* make a new ambient value for storage */ |
446 |
|
COLOR acol, |
447 |
< |
register RAY *r, |
447 |
> |
RAY *r, |
448 |
|
FVECT rn, |
449 |
|
int al |
450 |
|
) |
451 |
|
{ |
452 |
|
AMBVAL amb; |
453 |
|
FVECT gp, gd; |
454 |
< |
/* compute weight */ |
455 |
< |
amb.weight = pow(AVGREFL, (double)al); |
456 |
< |
if (r->rweight < 0.1*amb.weight) /* heuristic */ |
457 |
< |
amb.weight = r->rweight; |
454 |
> |
int i; |
455 |
> |
|
456 |
> |
amb.weight = 1.0; /* compute weight */ |
457 |
> |
for (i = al; i-- > 0; ) |
458 |
> |
amb.weight *= AVGREFL; |
459 |
> |
if (r->rweight < 0.1*amb.weight) /* heuristic override */ |
460 |
> |
amb.weight = 1.25*r->rweight; |
461 |
> |
setcolor(acol, AVGREFL, AVGREFL, AVGREFL); |
462 |
|
/* compute ambient */ |
463 |
|
amb.rad = doambient(acol, r, amb.weight, gp, gd); |
464 |
< |
if (amb.rad <= FTINY) |
464 |
> |
if (amb.rad <= FTINY) { |
465 |
> |
setcolor(acol, 0.0, 0.0, 0.0); |
466 |
|
return(0.0); |
467 |
< |
/* store it */ |
467 |
> |
} |
468 |
> |
scalecolor(acol, 1./AVGREFL); /* undo assumed reflectance */ |
469 |
> |
/* store value */ |
470 |
|
VCOPY(amb.pos, r->rop); |
471 |
|
VCOPY(amb.dir, r->ron); |
472 |
|
amb.lvl = al; |
511 |
|
|
512 |
|
static void |
513 |
|
initambfile( /* initialize ambient file */ |
514 |
< |
int creat |
514 |
> |
int cre8 |
515 |
|
) |
516 |
|
{ |
517 |
|
extern char *progname, *octname; |
524 |
|
if (mybuf == NULL) |
525 |
|
mybuf = (char *)bmalloc(BUFSIZ+8); |
526 |
|
setbuf(ambfp, mybuf); |
527 |
< |
if (creat) { /* new file */ |
527 |
> |
if (cre8) { /* new file */ |
528 |
|
newheader("RADIANCE", ambfp); |
529 |
|
fprintf(ambfp, "%s -av %g %g %g -aw %d -ab %d -aa %g ", |
530 |
|
progname, colval(ambval,RED), |
533 |
|
fprintf(ambfp, "-ad %d -as %d -ar %d ", |
534 |
|
ambdiv, ambssamp, ambres); |
535 |
|
if (octname != NULL) |
536 |
< |
printargs(1, &octname, ambfp); |
537 |
< |
else |
518 |
< |
fputc('\n', ambfp); |
536 |
> |
fputs(octname, ambfp); |
537 |
> |
fputc('\n', ambfp); |
538 |
|
fprintf(ambfp, "SOFTWARE= %s\n", VersionID); |
539 |
|
fputnow(ambfp); |
540 |
|
fputformat(AMBFMT, ambfp); |
541 |
< |
putc('\n', ambfp); |
541 |
> |
fputc('\n', ambfp); |
542 |
|
putambmagic(ambfp); |
543 |
|
} else if (checkheader(ambfp, AMBFMT, NULL) < 0 || !hasambmagic(ambfp)) |
544 |
|
error(USER, "bad ambient file"); |
866 |
|
{ |
867 |
|
static struct flock fls; /* static so initialized to zeroes */ |
868 |
|
|
869 |
+ |
if (typ == fls.l_type) /* already called? */ |
870 |
+ |
return; |
871 |
|
fls.l_type = typ; |
872 |
|
if (fcntl(fileno(ambfp), F_SETLKW, &fls) < 0) |
873 |
|
error(SYSTEM, "cannot (un)lock ambient file"); |
881 |
|
AMBVAL avs; |
882 |
|
register int n; |
883 |
|
|
884 |
< |
if (nunflshed == 0) |
884 |
> |
if (ambfp == NULL) /* no ambient file? */ |
885 |
|
return(0); |
886 |
< |
if (lastpos < 0) /* initializing (locked in initambfile) */ |
887 |
< |
goto syncend; |
867 |
< |
/* gain exclusive access */ |
868 |
< |
aflock(F_WRLCK); |
886 |
> |
/* gain appropriate access */ |
887 |
> |
aflock(nunflshed ? F_WRLCK : F_RDLCK); |
888 |
|
/* see if file has grown */ |
889 |
|
if ((flen = lseek(fileno(ambfp), (off_t)0, SEEK_END)) < 0) |
890 |
|
goto seekerr; |
891 |
< |
if ( (n = flen - lastpos) ) { /* file has grown */ |
891 |
> |
if ((n = flen - lastpos) > 0) { /* file has grown */ |
892 |
|
if (ambinp == NULL) { /* use duplicate filedes */ |
893 |
|
ambinp = fdopen(dup(fileno(ambfp)), "r"); |
894 |
|
if (ambinp == NULL) |
895 |
|
error(SYSTEM, "fdopen failed in ambsync"); |
896 |
|
} |
897 |
< |
if (fseek(ambinp, lastpos, 0) < 0) |
897 |
> |
if (fseek(ambinp, lastpos, SEEK_SET) < 0) |
898 |
|
goto seekerr; |
899 |
|
while (n >= AMBVALSIZ) { /* load contributed values */ |
900 |
|
if (!readambval(&avs, ambinp)) { |
907 |
|
avinsert(avstore(&avs)); |
908 |
|
n -= AMBVALSIZ; |
909 |
|
} |
910 |
+ |
lastpos = flen - n; |
911 |
|
/*** seek always as safety measure |
912 |
|
if (n) ***/ /* alignment */ |
913 |
< |
if (lseek(fileno(ambfp), (off_t)(flen-n), SEEK_SET) < 0) |
913 |
> |
if (lseek(fileno(ambfp), (off_t)lastpos, SEEK_SET) < 0) |
914 |
|
goto seekerr; |
915 |
|
} |
896 |
– |
#ifdef DEBUG |
897 |
– |
if (ambfp->_ptr - ambfp->_base != nunflshed*AMBVALSIZ) { |
898 |
– |
sprintf(errmsg, "ambient file buffer at %d rather than %d", |
899 |
– |
ambfp->_ptr - ambfp->_base, |
900 |
– |
nunflshed*AMBVALSIZ); |
901 |
– |
error(CONSISTENCY, errmsg); |
902 |
– |
} |
903 |
– |
#endif |
904 |
– |
syncend: |
916 |
|
n = fflush(ambfp); /* calls write() at last */ |
917 |
< |
if ((lastpos = lseek(fileno(ambfp), (off_t)0, SEEK_CUR)) < 0) |
917 |
> |
if (n != EOF) |
918 |
> |
lastpos += (long)nunflshed*AMBVALSIZ; |
919 |
> |
else if ((lastpos = lseek(fileno(ambfp), (off_t)0, SEEK_CUR)) < 0) |
920 |
|
goto seekerr; |
921 |
+ |
|
922 |
|
aflock(F_UNLCK); /* release file */ |
923 |
|
nunflshed = 0; |
924 |
|
return(n); |
932 |
|
extern int |
933 |
|
ambsync(void) /* flush ambient file */ |
934 |
|
{ |
935 |
< |
if (nunflshed == 0) |
935 |
> |
if (ambfp == NULL) |
936 |
|
return(0); |
937 |
|
nunflshed = 0; |
938 |
|
return(fflush(ambfp)); |