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#ifndef OCTSCALE |
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#define OCTSCALE 1.0 /* ceil((valid rad.)/(cube size)) */ |
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#endif |
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– |
#ifndef AMBVWT |
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– |
#define AMBVWT 250 /* relative ambient value weight (# calcs) */ |
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– |
#endif |
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typedef struct ambtree { |
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AMBVAL *alist; /* ambient value list */ |
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#endif |
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static COLOR avsum = BLKCOLOR; /* computed ambient value sum */ |
| 60 |
< |
static unsigned int nambvals = 0; /* number of computed ambient values */ |
| 60 |
> |
static unsigned int nambvals = 0; /* total number of indirect values */ |
| 61 |
> |
static unsigned int nambshare = 0; /* number of values from file */ |
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static unsigned long ambclock = 0; /* ambient access clock */ |
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static unsigned long lastsort = 0; /* time of last value sort */ |
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static long sortintvl = SORT_INTVL; /* time until next sort */ |
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/* |
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* Track access times unless we are sharing ambient values |
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* through memory on a multiprocessor, when we want to avoid |
| 70 |
< |
* claiming our own memory (copy on write). |
| 70 |
> |
* claiming our own memory (copy on write). Go ahead anyway |
| 71 |
> |
* if more than two thirds of our values are unshared. |
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*/ |
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< |
#define tracktime (shm_boundary == NULL || ambfp == NULL) |
| 73 |
> |
#define tracktime (shm_boundary == NULL || nambvals > 3*nambshare) |
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|
| 75 |
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#define AMBFLUSH (BUFSIZ/AMBVALSIZ) |
| 76 |
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|
| 142 |
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avinsert(avstore(&amb)); |
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/* align */ |
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fseek(ambfp, -((ftell(ambfp)-headlen)%AMBVALSIZ), 1); |
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+ |
nambshare = nambvals; |
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} else if ((ambfp = fopen(afile, "w+")) != NULL) |
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initambfile(1); |
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else { |
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return; |
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dumbamb: /* return global value */ |
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copycolor(acol, ambval); |
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< |
#if AMBVWT |
| 223 |
< |
if (nambvals == 0) |
| 222 |
> |
if (ambvwt <= 0 | nambvals == 0) |
| 223 |
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return; |
| 224 |
< |
scalecolor(acol, (double)AMBVWT); |
| 224 |
> |
scalecolor(acol, (double)ambvwt); |
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addcolor(acol, avsum); /* average in computations */ |
| 226 |
< |
d = 1.0/(AMBVWT+nambvals); |
| 226 |
> |
d = 1.0/(ambvwt+nambvals); |
| 227 |
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scalecolor(acol, d); |
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– |
#endif |
| 228 |
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} |
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