43 |
|
#define newambval() (AMBVAL *)bmalloc(sizeof(AMBVAL)) |
44 |
|
|
45 |
|
#define newambtree() (AMBTREE *)calloc(8, sizeof(AMBTREE)) |
46 |
+ |
#define freeambtree(t) free((char *)(t)) |
47 |
|
|
48 |
|
extern long ftell(), lseek(); |
49 |
< |
static int initambfile(), avsave(), avinsert(); |
49 |
> |
static int initambfile(), avsave(), avinsert(), loadatree(); |
50 |
> |
static AMBVAL *avstore(); |
51 |
|
#ifdef F_SETLKW |
52 |
|
static aflock(); |
53 |
|
#endif |
56 |
|
setambres(ar) /* set ambient resolution */ |
57 |
|
int ar; |
58 |
|
{ |
59 |
+ |
ambres = ar < 0 ? 0 : ar; /* may be done already */ |
60 |
|
/* set min & max radii */ |
61 |
|
if (ar <= 0) { |
62 |
< |
minarad = 0.0; |
62 |
> |
minarad = 0; |
63 |
|
maxarad = thescene.cusize / 2.0; |
64 |
|
} else { |
65 |
|
minarad = thescene.cusize / ar; |
66 |
< |
maxarad = 16.0 * minarad; /* heuristic */ |
66 |
> |
maxarad = 16 * minarad; /* heuristic */ |
67 |
|
if (maxarad > thescene.cusize / 2.0) |
68 |
|
maxarad = thescene.cusize / 2.0; |
69 |
|
} |
70 |
< |
if (maxarad <= FTINY) |
71 |
< |
maxarad = .001; |
70 |
> |
if (minarad <= FTINY) |
71 |
> |
minarad = 10*FTINY; |
72 |
> |
if (maxarad <= minarad) |
73 |
> |
maxarad = 64 * minarad; |
74 |
|
} |
75 |
|
|
76 |
|
|
77 |
+ |
setambacc(newa) /* set ambient accuracy */ |
78 |
+ |
double newa; |
79 |
+ |
{ |
80 |
+ |
static double oldambacc = -1.0; |
81 |
+ |
AMBTREE oldatrunk; |
82 |
+ |
|
83 |
+ |
ambacc = newa < 0.0 ? 0.0 : newa; /* may be done already */ |
84 |
+ |
if (oldambacc < -FTINY) |
85 |
+ |
oldambacc = ambacc; /* do nothing first call */ |
86 |
+ |
if (fabs(newa - oldambacc) < 0.01) |
87 |
+ |
return; /* insignificant -- don't bother */ |
88 |
+ |
if (ambacc <= FTINY) |
89 |
+ |
return; /* cannot build new tree */ |
90 |
+ |
/* else need to rebuild tree */ |
91 |
+ |
copystruct(&oldatrunk, &atrunk); |
92 |
+ |
atrunk.alist = NULL; |
93 |
+ |
atrunk.kid = NULL; |
94 |
+ |
loadatree(&oldatrunk); |
95 |
+ |
oldambacc = ambacc; /* remeber setting for next call */ |
96 |
+ |
} |
97 |
+ |
|
98 |
+ |
|
99 |
|
setambient(afile) /* initialize calculation */ |
100 |
|
char *afile; |
101 |
|
{ |
103 |
|
AMBVAL amb; |
104 |
|
/* init ambient limits */ |
105 |
|
setambres(ambres); |
106 |
+ |
setambacc(ambacc); |
107 |
|
if (afile == NULL) |
108 |
|
return; |
109 |
+ |
if (ambacc <= FTINY) { |
110 |
+ |
sprintf(errmsg, "zero ambient accuracy so \"%s\" not opened", |
111 |
+ |
afile); |
112 |
+ |
error(WARNING, errmsg); |
113 |
+ |
return; |
114 |
+ |
} |
115 |
|
/* open ambient file */ |
116 |
|
if ((ambfp = fopen(afile, "r+")) != NULL) { |
117 |
|
initambfile(0); |
118 |
|
headlen = ftell(ambfp); |
119 |
|
while (readambval(&amb, ambfp)) |
120 |
< |
avinsert(&amb, &atrunk, thescene.cuorg, |
87 |
< |
thescene.cusize); |
120 |
> |
avinsert(avstore(&amb)); |
121 |
|
/* align */ |
122 |
|
fseek(ambfp, -((ftell(ambfp)-headlen)%AMBVALSIZ), 1); |
123 |
|
} else if ((ambfp = fopen(afile, "w+")) != NULL) |
216 |
|
/* |
217 |
|
* Ambient level test. |
218 |
|
*/ |
219 |
< |
if (av->lvl > al || av->weight < r->rweight-FTINY) |
219 |
> |
if (av->lvl > al) /* list sorted, so this works */ |
220 |
> |
break; |
221 |
> |
if (av->weight < r->rweight-FTINY) |
222 |
|
continue; |
223 |
|
/* |
224 |
|
* Ambient radius test. |
351 |
|
#ifdef MSDOS |
352 |
|
setmode(fileno(ambfp), O_BINARY); |
353 |
|
#endif |
354 |
< |
setbuf(ambfp, bmalloc(BUFSIZ)); |
354 |
> |
setbuf(ambfp, bmalloc(BUFSIZ+8)); |
355 |
|
if (creat) { /* new file */ |
356 |
+ |
newheader("RADIANCE", ambfp); |
357 |
|
fprintf(ambfp, "%s -av %g %g %g -ab %d -aa %g ", |
358 |
|
progname, colval(ambval,RED), |
359 |
|
colval(ambval,GRN), colval(ambval,BLU), |
374 |
|
avsave(av) /* insert and save an ambient value */ |
375 |
|
AMBVAL *av; |
376 |
|
{ |
377 |
< |
avinsert(av, &atrunk, thescene.cuorg, thescene.cusize); |
377 |
> |
avinsert(avstore(av)); |
378 |
|
if (ambfp == NULL) |
379 |
|
return; |
380 |
|
if (writambval(av, ambfp) < 0) |
388 |
|
} |
389 |
|
|
390 |
|
|
391 |
+ |
static AMBVAL * |
392 |
+ |
avstore(aval) /* allocate memory and store aval */ |
393 |
+ |
register AMBVAL *aval; |
394 |
+ |
{ |
395 |
+ |
register AMBVAL *av; |
396 |
+ |
|
397 |
+ |
if ((av = newambval()) == NULL) |
398 |
+ |
error(SYSTEM, "out of memory in avstore"); |
399 |
+ |
copystruct(av, aval); |
400 |
+ |
return(av); |
401 |
+ |
} |
402 |
+ |
|
403 |
+ |
|
404 |
|
static |
405 |
< |
avinsert(aval, at, c0, s) /* insert ambient value in a tree */ |
406 |
< |
AMBVAL *aval; |
358 |
< |
register AMBTREE *at; |
359 |
< |
FVECT c0; |
360 |
< |
double s; |
405 |
> |
avinsert(av) /* insert ambient value in our tree */ |
406 |
> |
register AMBVAL *av; |
407 |
|
{ |
408 |
+ |
register AMBTREE *at; |
409 |
+ |
register AMBVAL *ap; |
410 |
+ |
AMBVAL avh; |
411 |
|
FVECT ck0; |
412 |
+ |
double s; |
413 |
|
int branch; |
364 |
– |
register AMBVAL *av; |
414 |
|
register int i; |
415 |
|
|
416 |
< |
if ((av = newambval()) == NULL) |
417 |
< |
goto memerr; |
418 |
< |
copystruct(av, aval); |
419 |
< |
VCOPY(ck0, c0); |
416 |
> |
if (av->rad <= FTINY) |
417 |
> |
error(CONSISTENCY, "zero ambient radius in avinsert"); |
418 |
> |
at = &atrunk; |
419 |
> |
VCOPY(ck0, thescene.cuorg); |
420 |
> |
s = thescene.cusize; |
421 |
|
while (s*(OCTSCALE/2) > av->rad*ambacc) { |
422 |
|
if (at->kid == NULL) |
423 |
|
if ((at->kid = newambtree()) == NULL) |
424 |
< |
goto memerr; |
424 |
> |
error(SYSTEM, "out of memory in avinsert"); |
425 |
|
s *= 0.5; |
426 |
|
branch = 0; |
427 |
|
for (i = 0; i < 3; i++) |
431 |
|
} |
432 |
|
at = at->kid + branch; |
433 |
|
} |
434 |
< |
av->next = at->alist; |
435 |
< |
at->alist = av; |
436 |
< |
return; |
437 |
< |
memerr: |
438 |
< |
error(SYSTEM, "out of memory in avinsert"); |
434 |
> |
avh.next = at->alist; /* order by increasing level */ |
435 |
> |
for (ap = &avh; ap->next != NULL; ap = ap->next) |
436 |
> |
if (ap->next->lvl >= av->lvl) |
437 |
> |
break; |
438 |
> |
av->next = ap->next; |
439 |
> |
ap->next = av; |
440 |
> |
at->alist = avh.next; |
441 |
|
} |
442 |
|
|
443 |
|
|
444 |
+ |
static |
445 |
+ |
loadatree(at) /* move tree to main store */ |
446 |
+ |
register AMBTREE *at; |
447 |
+ |
{ |
448 |
+ |
register AMBVAL *av; |
449 |
+ |
register int i; |
450 |
+ |
/* transfer values at this node */ |
451 |
+ |
for (av = at->alist; av != NULL; av = at->alist) { |
452 |
+ |
at->alist = av->next; |
453 |
+ |
avinsert(av); |
454 |
+ |
} |
455 |
+ |
if (at->kid == NULL) |
456 |
+ |
return; |
457 |
+ |
for (i = 0; i < 8; i++) /* transfer and free children */ |
458 |
+ |
loadatree(at->kid+i); |
459 |
+ |
freeambtree(at->kid); |
460 |
+ |
} |
461 |
+ |
|
462 |
+ |
|
463 |
|
#ifdef F_SETLKW |
464 |
|
|
465 |
|
static |
491 |
|
aflock(F_WRLCK); |
492 |
|
/* see if file has grown */ |
493 |
|
if ((flen = lseek(fileno(ambfp), 0L, 2)) < 0) |
494 |
< |
error(SYSTEM, "cannot seek on ambient file"); |
494 |
> |
goto seekerr; |
495 |
|
if (n = flen - lastpos) { /* file has grown */ |
496 |
|
if (ambinp == NULL) { /* use duplicate filedes */ |
497 |
|
ambinp = fdopen(dup(fileno(ambfp)), "r"); |
499 |
|
error(SYSTEM, "fdopen failed in ambsync"); |
500 |
|
} |
501 |
|
if (fseek(ambinp, lastpos, 0) < 0) |
502 |
< |
error(SYSTEM, "fseek failed in ambsync"); |
502 |
> |
goto seekerr; |
503 |
|
while (n >= AMBVALSIZ) { /* load contributed values */ |
504 |
|
readambval(&avs, ambinp); |
505 |
< |
avinsert(&avs,&atrunk,thescene.cuorg,thescene.cusize); |
505 |
> |
avinsert(avstore(&avs)); |
506 |
|
n -= AMBVALSIZ; |
507 |
|
} |
508 |
< |
if (n) /* alignment */ |
509 |
< |
lseek(fileno(ambfp), flen-n, 0); |
508 |
> |
/*** seek always as safety measure |
509 |
> |
if (n) ***/ /* alignment */ |
510 |
> |
if (lseek(fileno(ambfp), flen-n, 0) < 0) |
511 |
> |
goto seekerr; |
512 |
|
} |
513 |
+ |
#ifdef DEBUG |
514 |
+ |
if (ambfp->_ptr - ambfp->_base != nunflshed*AMBVALSIZ) { |
515 |
+ |
sprintf(errmsg, "ambient file buffer at %d rather than %d", |
516 |
+ |
ambfp->_ptr - ambfp->_base, |
517 |
+ |
nunflshed*AMBVALSIZ); |
518 |
+ |
error(CONSISTENCY, errmsg); |
519 |
+ |
} |
520 |
+ |
#endif |
521 |
|
syncend: |
522 |
|
n = fflush(ambfp); /* calls write() at last */ |
523 |
< |
lastpos = lseek(fileno(ambfp), 0L, 1); |
523 |
> |
if ((lastpos = lseek(fileno(ambfp), 0L, 1)) < 0) |
524 |
> |
goto seekerr; |
525 |
|
aflock(F_UNLCK); /* release file */ |
526 |
|
nunflshed = 0; |
527 |
|
return(n); |
528 |
+ |
seekerr: |
529 |
+ |
error(SYSTEM, "seek failed in ambsync"); |
530 |
|
} |
531 |
|
|
532 |
|
#else |