35 |
|
|
36 |
|
static AMBTREE atrunk; /* our ambient trunk node */ |
37 |
|
|
38 |
– |
static char *ambfname = NULL; /* ambient file name */ |
38 |
|
static FILE *ambfp = NULL; /* ambient file pointer */ |
39 |
+ |
static int nunflshed = 0; /* number of unflushed ambient values */ |
40 |
|
|
41 |
|
#define AMBFLUSH (BUFSIZ/AMBVALSIZ) |
42 |
|
|
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(), ambsync(); |
49 |
> |
static int initambfile(), avsave(), avinsert(), loadtree(); |
50 |
> |
static AMBVAL *avstore(); |
51 |
> |
#ifdef F_SETLKW |
52 |
> |
static aflock(); |
53 |
> |
#endif |
54 |
|
|
55 |
|
|
56 |
|
setambres(ar) /* set ambient resolution */ |
57 |
|
int ar; |
58 |
|
{ |
59 |
+ |
ambres = 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 */ |
76 |
+ |
double newa; |
77 |
+ |
{ |
78 |
+ |
AMBTREE oldatrunk; |
79 |
+ |
|
80 |
+ |
if (fabs(newa - ambacc) < 0.01) |
81 |
+ |
return; /* insignificant -- don't bother */ |
82 |
+ |
ambacc = newa; |
83 |
+ |
if (ambacc <= FTINY) |
84 |
+ |
return; /* cannot build new tree */ |
85 |
+ |
/* else need to rebuild tree */ |
86 |
+ |
copystruct(&oldatrunk, &atrunk); |
87 |
+ |
atrunk.alist = NULL; |
88 |
+ |
atrunk.kid = NULL; |
89 |
+ |
loadtree(&oldatrunk); |
90 |
+ |
} |
91 |
+ |
|
92 |
+ |
|
93 |
|
setambient(afile) /* initialize calculation */ |
94 |
|
char *afile; |
95 |
|
{ |
97 |
|
AMBVAL amb; |
98 |
|
/* init ambient limits */ |
99 |
|
setambres(ambres); |
100 |
+ |
if (afile == NULL) |
101 |
+ |
return; |
102 |
+ |
if (ambacc <= FTINY) { |
103 |
+ |
sprintf(errmsg, "zero ambient accuracy so \"%s\" not loaded", |
104 |
+ |
afile); |
105 |
+ |
error(WARNING, errmsg); |
106 |
+ |
return; |
107 |
+ |
} |
108 |
|
/* open ambient file */ |
109 |
< |
if ((ambfname = afile) != NULL) |
110 |
< |
if ((ambfp = fopen(afile, "r+")) != NULL) { |
111 |
< |
initambfile(0); |
112 |
< |
headlen = ftell(ambfp); |
113 |
< |
while (readambval(&amb, ambfp)) |
114 |
< |
avinsert(&amb, &atrunk, thescene.cuorg, |
115 |
< |
thescene.cusize); |
116 |
< |
/* align */ |
117 |
< |
fseek(ambfp, -((ftell(ambfp)-headlen)%AMBVALSIZ), 1); |
118 |
< |
} else if ((ambfp = fopen(afile, "w+")) != NULL) |
119 |
< |
initambfile(1); |
120 |
< |
else { |
121 |
< |
sprintf(errmsg, "cannot open ambient file \"%s\"", |
122 |
< |
afile); |
123 |
< |
error(SYSTEM, errmsg); |
124 |
< |
} |
109 |
> |
if ((ambfp = fopen(afile, "r+")) != NULL) { |
110 |
> |
initambfile(0); |
111 |
> |
headlen = ftell(ambfp); |
112 |
> |
while (readambval(&amb, ambfp)) |
113 |
> |
avinsert(avstore(&amb), &atrunk, |
114 |
> |
thescene.cuorg, thescene.cusize); |
115 |
> |
/* align */ |
116 |
> |
fseek(ambfp, -((ftell(ambfp)-headlen)%AMBVALSIZ), 1); |
117 |
> |
} else if ((ambfp = fopen(afile, "w+")) != NULL) |
118 |
> |
initambfile(1); |
119 |
> |
else { |
120 |
> |
sprintf(errmsg, "cannot open ambient file \"%s\"", afile); |
121 |
> |
error(SYSTEM, errmsg); |
122 |
> |
} |
123 |
> |
nunflshed++; /* lie */ |
124 |
> |
ambsync(); |
125 |
|
} |
126 |
|
|
127 |
|
|
337 |
|
{ |
338 |
|
extern char *progname, *octname, VersionID[]; |
339 |
|
|
340 |
+ |
#ifdef F_SETLKW |
341 |
+ |
aflock(creat ? F_WRLCK : F_RDLCK); |
342 |
+ |
#endif |
343 |
|
#ifdef MSDOS |
344 |
|
setmode(fileno(ambfp), O_BINARY); |
345 |
|
#endif |
358 |
|
putambmagic(ambfp); |
359 |
|
} else if (checkheader(ambfp, AMBFMT, NULL) < 0 || !hasambmagic(ambfp)) |
360 |
|
error(USER, "bad ambient file"); |
326 |
– |
ambsync(); |
361 |
|
} |
362 |
|
|
363 |
|
|
365 |
|
avsave(av) /* insert and save an ambient value */ |
366 |
|
AMBVAL *av; |
367 |
|
{ |
368 |
< |
static int nunflshed = 0; |
335 |
< |
|
336 |
< |
avinsert(av, &atrunk, thescene.cuorg, thescene.cusize); |
368 |
> |
avinsert(avstore(av), &atrunk, thescene.cuorg, thescene.cusize); |
369 |
|
if (ambfp == NULL) |
370 |
|
return; |
371 |
|
if (writambval(av, ambfp) < 0) |
372 |
|
goto writerr; |
373 |
< |
if (++nunflshed >= AMBFLUSH) { |
373 |
> |
if (++nunflshed >= AMBFLUSH) |
374 |
|
if (ambsync() == EOF) |
375 |
|
goto writerr; |
344 |
– |
nunflshed = 0; |
345 |
– |
} |
376 |
|
return; |
377 |
|
writerr: |
378 |
|
error(SYSTEM, "error writing ambient file"); |
379 |
|
} |
380 |
|
|
381 |
|
|
382 |
+ |
static AMBVAL * |
383 |
+ |
avstore(aval) /* allocate memory and store aval */ |
384 |
+ |
register AMBVAL *aval; |
385 |
+ |
{ |
386 |
+ |
register AMBVAL *av; |
387 |
+ |
|
388 |
+ |
if ((av = newambval()) == NULL) |
389 |
+ |
error(SYSTEM, "out of memory in avstore"); |
390 |
+ |
copystruct(av, aval); |
391 |
+ |
return(av); |
392 |
+ |
} |
393 |
+ |
|
394 |
+ |
|
395 |
|
static |
396 |
< |
avinsert(aval, at, c0, s) /* insert ambient value in a tree */ |
397 |
< |
AMBVAL *aval; |
396 |
> |
avinsert(av, at, c0, s) /* insert ambient value in a tree */ |
397 |
> |
register AMBVAL *av; |
398 |
|
register AMBTREE *at; |
399 |
|
FVECT c0; |
400 |
|
double s; |
401 |
|
{ |
402 |
|
FVECT ck0; |
403 |
|
int branch; |
361 |
– |
register AMBVAL *av; |
404 |
|
register int i; |
405 |
|
|
406 |
< |
if ((av = newambval()) == NULL) |
407 |
< |
goto memerr; |
366 |
< |
copystruct(av, aval); |
406 |
> |
if (av->rad <= FTINY) |
407 |
> |
error(CONSISTENCY, "zero ambient radius in avinsert"); |
408 |
|
VCOPY(ck0, c0); |
409 |
|
while (s*(OCTSCALE/2) > av->rad*ambacc) { |
410 |
|
if (at->kid == NULL) |
411 |
|
if ((at->kid = newambtree()) == NULL) |
412 |
< |
goto memerr; |
412 |
> |
error(SYSTEM, "out of memory in avinsert"); |
413 |
|
s *= 0.5; |
414 |
|
branch = 0; |
415 |
|
for (i = 0; i < 3; i++) |
421 |
|
} |
422 |
|
av->next = at->alist; |
423 |
|
at->alist = av; |
383 |
– |
return; |
384 |
– |
memerr: |
385 |
– |
error(SYSTEM, "out of memory in avinsert"); |
424 |
|
} |
425 |
|
|
426 |
|
|
389 |
– |
#ifdef NIX |
390 |
– |
|
427 |
|
static |
428 |
< |
ambsync() /* flush ambient file */ |
428 |
> |
loadtree(at) /* move tree to main store */ |
429 |
> |
register AMBTREE *at; |
430 |
|
{ |
431 |
< |
return(fflush(ambfp)); |
431 |
> |
register AMBVAL *av; |
432 |
> |
register int i; |
433 |
> |
/* transfer values at this node */ |
434 |
> |
for (av = at->alist; av != NULL; av = at->alist) { |
435 |
> |
at->alist = av->next; |
436 |
> |
avinsert(av, &atrunk, thescene.cuorg, thescene.cusize); |
437 |
> |
} |
438 |
> |
for (i = 0; i < 8; i++) /* transfer and free children */ |
439 |
> |
loadtree(at->kid+i); |
440 |
> |
freeambtree(at->kid); |
441 |
|
} |
442 |
|
|
397 |
– |
#else |
443 |
|
|
444 |
+ |
#ifdef F_SETLKW |
445 |
+ |
|
446 |
|
static |
447 |
+ |
aflock(typ) /* lock/unlock ambient file */ |
448 |
+ |
int typ; |
449 |
+ |
{ |
450 |
+ |
static struct flock fls; /* static so initialized to zeroes */ |
451 |
+ |
|
452 |
+ |
fls.l_type = typ; |
453 |
+ |
if (fcntl(fileno(ambfp), F_SETLKW, &fls) < 0) |
454 |
+ |
error(SYSTEM, "cannot (un)lock ambient file"); |
455 |
+ |
} |
456 |
+ |
|
457 |
+ |
|
458 |
+ |
int |
459 |
|
ambsync() /* synchronize ambient file */ |
460 |
|
{ |
461 |
|
static FILE *ambinp = NULL; |
462 |
|
static long lastpos = -1; |
404 |
– |
struct flock fls; |
463 |
|
long flen; |
464 |
|
AMBVAL avs; |
465 |
|
register int n; |
466 |
< |
/* gain exclusive access */ |
467 |
< |
fls.l_type = F_WRLCK; |
468 |
< |
fls.l_whence = 0; |
469 |
< |
fls.l_start = 0L; |
412 |
< |
fls.l_len = 0L; |
413 |
< |
if (fcntl(fileno(ambfp), F_SETLKW, &fls) < 0) |
414 |
< |
error(SYSTEM, "cannot lock ambient file"); |
415 |
< |
if (lastpos < 0) /* initializing */ |
466 |
> |
|
467 |
> |
if (nunflshed == 0) |
468 |
> |
return(0); |
469 |
> |
if (lastpos < 0) /* initializing (locked in initambfile) */ |
470 |
|
goto syncend; |
471 |
+ |
/* gain exclusive access */ |
472 |
+ |
aflock(F_WRLCK); |
473 |
|
/* see if file has grown */ |
474 |
|
if ((flen = lseek(fileno(ambfp), 0L, 2)) < 0) |
475 |
|
error(SYSTEM, "cannot seek on ambient file"); |
476 |
|
if (n = flen - lastpos) { /* file has grown */ |
477 |
< |
if (ambinp == NULL) { |
478 |
< |
ambinp = fopen(ambfname, "r"); |
477 |
> |
if (ambinp == NULL) { /* use duplicate filedes */ |
478 |
> |
ambinp = fdopen(dup(fileno(ambfp)), "r"); |
479 |
|
if (ambinp == NULL) |
480 |
< |
error(SYSTEM, "fopen failed in ambsync"); |
480 |
> |
error(SYSTEM, "fdopen failed in ambsync"); |
481 |
|
} |
482 |
|
if (fseek(ambinp, lastpos, 0) < 0) |
483 |
|
error(SYSTEM, "fseek failed in ambsync"); |
484 |
|
while (n >= AMBVALSIZ) { /* load contributed values */ |
485 |
|
readambval(&avs, ambinp); |
486 |
< |
avinsert(&avs,&atrunk,thescene.cuorg,thescene.cusize); |
486 |
> |
avinsert(avstore(&avs), &atrunk, |
487 |
> |
thescene.cuorg, thescene.cusize); |
488 |
|
n -= AMBVALSIZ; |
489 |
|
} |
490 |
|
if (n) /* alignment */ |
493 |
|
syncend: |
494 |
|
n = fflush(ambfp); /* calls write() at last */ |
495 |
|
lastpos = lseek(fileno(ambfp), 0L, 1); |
496 |
< |
fls.l_type = F_UNLCK; /* release file */ |
497 |
< |
fcntl(fileno(ambfp), F_SETLKW, &fls); |
496 |
> |
aflock(F_UNLCK); /* release file */ |
497 |
> |
nunflshed = 0; |
498 |
|
return(n); |
499 |
+ |
} |
500 |
+ |
|
501 |
+ |
#else |
502 |
+ |
|
503 |
+ |
int |
504 |
+ |
ambsync() /* flush ambient file */ |
505 |
+ |
{ |
506 |
+ |
if (nunflshed == 0) |
507 |
+ |
return(0); |
508 |
+ |
nunflshed = 0; |
509 |
+ |
return(fflush(ambfp)); |
510 |
|
} |
511 |
|
|
512 |
|
#endif |