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18 |
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#include "octree.h" |
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|
20 |
+ |
#include "otypes.h" |
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|
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#include "random.h" |
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|
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#define OCTSCALE 0.5 /* ceil((valid rad.)/(cube size)) */ |
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extern char *amblist[]; /* ambient include/exclude list */ |
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extern int ambincl; /* include == 1, exclude == 0 */ |
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|
37 |
< |
OBJECT ambset[128]; /* ambient include/exclude set */ |
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> |
OBJECT ambset[256]={0}; /* ambient include/exclude set */ |
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|
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double maxarad; /* maximum ambient radius */ |
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double minarad; /* minimum ambient radius */ |
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char *afile; |
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{ |
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long ftell(); |
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– |
char **amblp; |
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OBJECT obj; |
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AMBVAL amb; |
81 |
< |
/* set up ambient set */ |
81 |
< |
ambset[0] = 0; |
82 |
< |
for (amblp = amblist; *amblp != NULL; amblp++) { |
83 |
< |
if ((obj = modifier(*amblp)) == OVOID) { |
84 |
< |
sprintf(errmsg, "unknown %s modifier \"%s\"", |
85 |
< |
ambincl ? "include" : "exclude", *amblp); |
86 |
< |
error(WARNING, errmsg); |
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< |
continue; |
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< |
} |
89 |
< |
if (!inset(ambset, obj)) |
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< |
insertelem(ambset, obj); |
91 |
< |
} |
81 |
> |
|
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maxarad = thescene.cusize / 2.0; /* maximum radius */ |
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/* minimum radius */ |
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minarad = ambres > 0 ? thescene.cusize/ambres : 0.0; |
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} |
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|
101 |
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|
102 |
+ |
ambnotify(obj) /* record new modifier */ |
103 |
+ |
OBJECT obj; |
104 |
+ |
{ |
105 |
+ |
register OBJREC *o = objptr(obj); |
106 |
+ |
register char **amblp; |
107 |
+ |
|
108 |
+ |
if (!ismodifier(o->otype)) |
109 |
+ |
return; |
110 |
+ |
for (amblp = amblist; *amblp != NULL; amblp++) |
111 |
+ |
if (!strcmp(o->oname, *amblp)) { |
112 |
+ |
insertelem(ambset, obj); |
113 |
+ |
return; |
114 |
+ |
} |
115 |
+ |
} |
116 |
+ |
|
117 |
+ |
|
118 |
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ambient(acol, r) /* compute ambient component for ray */ |
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COLOR acol; |
120 |
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register RAY *r; |
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* Jittering final test reduces image artifacts. |
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*/ |
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wt = sqrt(e1) + sqrt(e2); |
212 |
< |
if (wt > ambacc*(0.9 + 0.2*frandom())) |
212 |
> |
wt *= .9 + .2*frandom(); |
213 |
> |
if (wt > ambacc) |
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continue; |
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if (wt <= 1e-3) |
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wt = 1e3; |
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dnew.n = div[0].n + 1; |
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dnew.t = div[0].t; dnew.p = div[0].p; |
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b2 = bright(dnew.v)/dnew.n - bright(ar.rcol); |
391 |
< |
b2 = b2*b2 + div[0].k*div[0].n; |
392 |
< |
dnew.k = b2/dnew.n; |
391 |
> |
b2 = b2*b2 + div[0].k*(div[0].n*div[0].n); |
392 |
> |
dnew.k = b2/(dnew.n*dnew.n); |
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/* reinsert */ |
394 |
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for (k = 0; k < ne-1 && dnew.k < div[k+1].k; k++) |
395 |
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bcopy(&div[k+1], &div[k], sizeof(AMBSAMP)); |