| 152 |
|
ambdone(); |
| 153 |
|
/* init ambient limits */ |
| 154 |
|
setambres(ambres); |
| 155 |
< |
setambacc(ambacc); |
| 155 |
> |
qambacc = sqrt(sqrt(ambacc *= (ambacc > FTINY))); |
| 156 |
|
if (ambfile == NULL || !ambfile[0]) |
| 157 |
|
return; |
| 158 |
|
if (ambacc <= FTINY) { |
| 357 |
|
FVECT c0, |
| 358 |
|
double s |
| 359 |
|
) |
| 360 |
< |
{ /* initial limit is ambacc radians */ |
| 361 |
< |
const double maxangle = (ambacc-PI/2.)*pow(r->rweight,0.13) + PI/2.; |
| 360 |
> |
{ /* initial limit is 5 degrees plus ambacc radians */ |
| 361 |
> |
const double minangle = 5.0 * PI/180.; |
| 362 |
> |
const double maxangle = (minangle+ambacc-PI/2.)*pow(r->rweight,0.13) |
| 363 |
> |
+ PI/2.; |
| 364 |
|
double wsum = 0.0; |
| 365 |
|
FVECT ck0; |
| 366 |
|
int i, j; |
| 408 |
|
d = 0.0; |
| 409 |
|
for (j = 0; j < 3; j++) |
| 410 |
|
d += (r->rop[j] - av->pos[j])*(uvw[2][j] + r->ron[j]); |
| 411 |
< |
if (d*0.5 < -minarad*ambacc-.001) |
| 411 |
> |
if (d*0.5 < -minarad*qambacc-.001) |
| 412 |
|
continue; |
| 413 |
|
/* |
| 414 |
|
* Extrapolate value and compute final weight (hat function) |
| 463 |
|
/* compute ambient */ |
| 464 |
|
i = doambient(acol, r, amb.weight, uvw, amb.rad, amb.gpos, amb.gdir); |
| 465 |
|
scalecolor(acol, 1./AVGREFL); /* undo assumed reflectance */ |
| 466 |
< |
if (i <= 0) /* no Hessian => no storage */ |
| 466 |
> |
if (i <= 0 || amb.rad[0] <= FTINY) /* no Hessian or zero radius */ |
| 467 |
|
return(i); |
| 468 |
|
/* store value */ |
| 469 |
|
VCOPY(amb.pos, r->rop); |
