46 |
|
#define freeambtree(t) free((char *)(t)) |
47 |
|
|
48 |
|
extern long ftell(), lseek(); |
49 |
< |
static int initambfile(), avsave(), avinsert(), loadtree(); |
49 |
> |
static int initambfile(), avsave(), avinsert(), loadatree(); |
50 |
|
static AMBVAL *avstore(); |
51 |
|
#ifdef F_SETLKW |
52 |
|
static aflock(); |
56 |
|
setambres(ar) /* set ambient resolution */ |
57 |
|
int ar; |
58 |
|
{ |
59 |
< |
ambres = ar; /* may be done already */ |
59 |
> |
ambres = ar < 0 ? 0 : ar; /* may be done already */ |
60 |
|
/* set min & max radii */ |
61 |
|
if (ar <= 0) { |
62 |
|
minarad = 0.0; |
72 |
|
} |
73 |
|
|
74 |
|
|
75 |
< |
resetambacc(newa) /* change ambient accuracy setting */ |
75 |
> |
setambacc(newa) /* set ambient accuracy */ |
76 |
|
double newa; |
77 |
|
{ |
78 |
+ |
static double oldambacc = -1.0; |
79 |
|
AMBTREE oldatrunk; |
80 |
|
|
81 |
< |
if (fabs(newa - ambacc) < 0.01) |
81 |
> |
ambacc = newa < 0.0 ? 0.0 : newa; /* may be done already */ |
82 |
> |
if (oldambacc < -FTINY) |
83 |
> |
oldambacc = ambacc; /* do nothing first call */ |
84 |
> |
if (fabs(newa - oldambacc) < 0.01) |
85 |
|
return; /* insignificant -- don't bother */ |
82 |
– |
ambacc = newa; |
86 |
|
if (ambacc <= FTINY) |
87 |
|
return; /* cannot build new tree */ |
88 |
|
/* else need to rebuild tree */ |
89 |
|
copystruct(&oldatrunk, &atrunk); |
90 |
|
atrunk.alist = NULL; |
91 |
|
atrunk.kid = NULL; |
92 |
< |
loadtree(&oldatrunk); |
92 |
> |
loadatree(&oldatrunk); |
93 |
> |
oldambacc = ambacc; /* remeber setting for next call */ |
94 |
|
} |
95 |
|
|
96 |
|
|
101 |
|
AMBVAL amb; |
102 |
|
/* init ambient limits */ |
103 |
|
setambres(ambres); |
104 |
+ |
setambacc(ambacc); |
105 |
|
if (afile == NULL) |
106 |
|
return; |
107 |
|
if (ambacc <= FTINY) { |
108 |
< |
sprintf(errmsg, "zero ambient accuracy so \"%s\" not loaded", |
108 |
> |
sprintf(errmsg, "zero ambient accuracy so \"%s\" not opened", |
109 |
|
afile); |
110 |
|
error(WARNING, errmsg); |
111 |
|
return; |
115 |
|
initambfile(0); |
116 |
|
headlen = ftell(ambfp); |
117 |
|
while (readambval(&amb, ambfp)) |
118 |
< |
avinsert(avstore(&amb), &atrunk, |
114 |
< |
thescene.cuorg, thescene.cusize); |
118 |
> |
avinsert(avstore(&amb)); |
119 |
|
/* align */ |
120 |
|
fseek(ambfp, -((ftell(ambfp)-headlen)%AMBVALSIZ), 1); |
121 |
|
} else if ((ambfp = fopen(afile, "w+")) != NULL) |
347 |
|
#ifdef MSDOS |
348 |
|
setmode(fileno(ambfp), O_BINARY); |
349 |
|
#endif |
350 |
< |
setbuf(ambfp, bmalloc(BUFSIZ)); |
350 |
> |
setbuf(ambfp, bmalloc(BUFSIZ+8)); |
351 |
|
if (creat) { /* new file */ |
352 |
|
fprintf(ambfp, "%s -av %g %g %g -ab %d -aa %g ", |
353 |
|
progname, colval(ambval,RED), |
369 |
|
avsave(av) /* insert and save an ambient value */ |
370 |
|
AMBVAL *av; |
371 |
|
{ |
372 |
< |
avinsert(avstore(av), &atrunk, thescene.cuorg, thescene.cusize); |
372 |
> |
avinsert(avstore(av)); |
373 |
|
if (ambfp == NULL) |
374 |
|
return; |
375 |
|
if (writambval(av, ambfp) < 0) |
397 |
|
|
398 |
|
|
399 |
|
static |
400 |
< |
avinsert(av, at, c0, s) /* insert ambient value in a tree */ |
400 |
> |
avinsert(av) /* insert ambient value in our tree */ |
401 |
|
register AMBVAL *av; |
398 |
– |
register AMBTREE *at; |
399 |
– |
FVECT c0; |
400 |
– |
double s; |
402 |
|
{ |
403 |
+ |
register AMBTREE *at; |
404 |
|
FVECT ck0; |
405 |
+ |
double s; |
406 |
|
int branch; |
407 |
|
register int i; |
408 |
|
|
409 |
|
if (av->rad <= FTINY) |
410 |
|
error(CONSISTENCY, "zero ambient radius in avinsert"); |
411 |
< |
VCOPY(ck0, c0); |
411 |
> |
at = &atrunk; |
412 |
> |
VCOPY(ck0, thescene.cuorg); |
413 |
> |
s = thescene.cusize; |
414 |
|
while (s*(OCTSCALE/2) > av->rad*ambacc) { |
415 |
|
if (at->kid == NULL) |
416 |
|
if ((at->kid = newambtree()) == NULL) |
430 |
|
|
431 |
|
|
432 |
|
static |
433 |
< |
loadtree(at) /* move tree to main store */ |
433 |
> |
loadatree(at) /* move tree to main store */ |
434 |
|
register AMBTREE *at; |
435 |
|
{ |
436 |
|
register AMBVAL *av; |
438 |
|
/* transfer values at this node */ |
439 |
|
for (av = at->alist; av != NULL; av = at->alist) { |
440 |
|
at->alist = av->next; |
441 |
< |
avinsert(av, &atrunk, thescene.cuorg, thescene.cusize); |
441 |
> |
avinsert(av); |
442 |
|
} |
443 |
+ |
if (at->kid == NULL) |
444 |
+ |
return; |
445 |
|
for (i = 0; i < 8; i++) /* transfer and free children */ |
446 |
< |
loadtree(at->kid+i); |
446 |
> |
loadatree(at->kid+i); |
447 |
|
freeambtree(at->kid); |
448 |
|
} |
449 |
|
|
479 |
|
aflock(F_WRLCK); |
480 |
|
/* see if file has grown */ |
481 |
|
if ((flen = lseek(fileno(ambfp), 0L, 2)) < 0) |
482 |
< |
error(SYSTEM, "cannot seek on ambient file"); |
482 |
> |
goto seekerr; |
483 |
|
if (n = flen - lastpos) { /* file has grown */ |
484 |
|
if (ambinp == NULL) { /* use duplicate filedes */ |
485 |
|
ambinp = fdopen(dup(fileno(ambfp)), "r"); |
487 |
|
error(SYSTEM, "fdopen failed in ambsync"); |
488 |
|
} |
489 |
|
if (fseek(ambinp, lastpos, 0) < 0) |
490 |
< |
error(SYSTEM, "fseek failed in ambsync"); |
490 |
> |
goto seekerr; |
491 |
|
while (n >= AMBVALSIZ) { /* load contributed values */ |
492 |
|
readambval(&avs, ambinp); |
493 |
< |
avinsert(avstore(&avs), &atrunk, |
487 |
< |
thescene.cuorg, thescene.cusize); |
493 |
> |
avinsert(avstore(&avs)); |
494 |
|
n -= AMBVALSIZ; |
495 |
|
} |
496 |
< |
if (n) /* alignment */ |
497 |
< |
lseek(fileno(ambfp), flen-n, 0); |
496 |
> |
/*** seek always as safety measure |
497 |
> |
if (n) ***/ /* alignment */ |
498 |
> |
if (lseek(fileno(ambfp), flen-n, 0) < 0) |
499 |
> |
goto seekerr; |
500 |
|
} |
501 |
+ |
#ifdef DEBUG |
502 |
+ |
if (ambfp->_ptr - ambfp->_base != nunflshed*AMBVALSIZ) { |
503 |
+ |
sprintf(errmsg, "ambient file buffer at %d rather than %d", |
504 |
+ |
ambfp->_ptr - ambfp->_base, |
505 |
+ |
nunflshed*AMBVALSIZ); |
506 |
+ |
error(CONSISTENCY, errmsg); |
507 |
+ |
} |
508 |
+ |
#endif |
509 |
|
syncend: |
510 |
|
n = fflush(ambfp); /* calls write() at last */ |
511 |
< |
lastpos = lseek(fileno(ambfp), 0L, 1); |
511 |
> |
if ((lastpos = lseek(fileno(ambfp), 0L, 1)) < 0) |
512 |
> |
goto seekerr; |
513 |
|
aflock(F_UNLCK); /* release file */ |
514 |
|
nunflshed = 0; |
515 |
|
return(n); |
516 |
+ |
seekerr: |
517 |
+ |
error(SYSTEM, "seek failed in ambsync"); |
518 |
|
} |
519 |
|
|
520 |
|
#else |