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(), loadtree(); |
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; /* 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 |
|
{ |
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 ((ambfp = fopen(afile, "r+")) != NULL) { |
110 |
|
initambfile(0); |
111 |
|
headlen = ftell(ambfp); |
112 |
|
while (readambval(&amb, ambfp)) |
113 |
< |
avinsert(&amb, &atrunk, thescene.cuorg, |
114 |
< |
thescene.cusize); |
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) |
365 |
|
avsave(av) /* insert and save an ambient value */ |
366 |
|
AMBVAL *av; |
367 |
|
{ |
368 |
< |
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) |
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; |
364 |
– |
register AMBVAL *av; |
404 |
|
register int i; |
405 |
|
|
406 |
< |
if ((av = newambval()) == NULL) |
407 |
< |
goto memerr; |
369 |
< |
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; |
386 |
– |
return; |
387 |
– |
memerr: |
388 |
– |
error(SYSTEM, "out of memory in avinsert"); |
424 |
|
} |
425 |
|
|
426 |
|
|
427 |
+ |
static |
428 |
+ |
loadtree(at) /* move tree to main store */ |
429 |
+ |
register AMBTREE *at; |
430 |
+ |
{ |
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 |
+ |
|
443 |
+ |
|
444 |
|
#ifdef F_SETLKW |
445 |
|
|
446 |
|
static |
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 */ |