| 109 |
|
setambacc(newa) /* set ambient accuracy */ |
| 110 |
|
double newa; |
| 111 |
|
{ |
| 112 |
< |
static double oldambacc = -1.0; |
| 112 |
> |
double ambdiff; |
| 113 |
|
|
| 114 |
< |
ambacc = newa < 0.0 ? 0.0 : newa; /* may be done already */ |
| 115 |
< |
if (oldambacc < -FTINY) |
| 116 |
< |
oldambacc = ambacc; /* do nothing first call */ |
| 117 |
< |
if (fabs(newa - oldambacc) < 0.01) |
| 118 |
< |
return; /* insignificant -- don't bother */ |
| 119 |
< |
if (ambacc <= FTINY) |
| 120 |
< |
return; /* cannot build new tree */ |
| 121 |
< |
/* else need to rebuild tree */ |
| 122 |
< |
sortambvals(1); |
| 123 |
< |
oldambacc = ambacc; /* remeber setting for next call */ |
| 114 |
> |
if (newa < 0.0) |
| 115 |
> |
newa = 0.0; |
| 116 |
> |
ambdiff = fabs(newa - ambacc); |
| 117 |
> |
if (ambdiff >= .01 && (ambacc = newa) > FTINY && nambvals > 0) |
| 118 |
> |
sortambvals(1); /* rebuild tree */ |
| 119 |
|
} |
| 120 |
|
|
| 121 |
|
|
| 211 |
|
scalecolor(acol, 1.0/d); |
| 212 |
|
return; |
| 213 |
|
} |
| 214 |
< |
rdepth++; |
| 214 |
> |
rdepth++; /* need to cache new value */ |
| 215 |
|
d = makeambient(acol, r, rdepth-1); |
| 216 |
|
rdepth--; |
| 217 |
|
if (d > FTINY) |
| 331 |
|
FVECT gp, gd; |
| 332 |
|
/* compute weight */ |
| 333 |
|
amb.weight = pow(AVGREFL, (double)al); |
| 334 |
< |
if (r->rweight < 0.2*amb.weight) /* heuristic */ |
| 334 |
> |
if (r->rweight < 0.1*amb.weight) /* heuristic */ |
| 335 |
|
amb.weight = r->rweight; |
| 336 |
|
/* compute ambient */ |
| 337 |
|
amb.rad = doambient(acol, r, amb.weight, gp, gd); |
| 338 |
< |
if (amb.rad == 0.0) |
| 338 |
> |
if (amb.rad <= FTINY) |
| 339 |
|
return(0.0); |
| 340 |
|
/* store it */ |
| 341 |
|
VCOPY(amb.pos, r->rop); |
