| 218 |
|
wt > (d = 0.8*intens(rcol)*r->rweight/(ambdiv*minweight))) |
| 219 |
|
wt = d; /* avoid ray termination */ |
| 220 |
|
n = sqrt(ambdiv * wt) + 0.5; |
| 221 |
< |
i = 1 + 8*(ambacc > FTINY); /* minimum number of samples */ |
| 221 |
> |
i = 1 + 5*(ambacc > FTINY); /* minimum number of samples */ |
| 222 |
|
if (n < i) |
| 223 |
|
n = i; |
| 224 |
|
/* allocate sampling array */ |
| 235 |
|
d = 1.0/(n*n); |
| 236 |
|
scalecolor(hp->acoef, d); |
| 237 |
|
/* make tangent plane axes */ |
| 238 |
< |
hp->uy[0] = 0.5 - frandom(); |
| 239 |
< |
hp->uy[1] = 0.5 - frandom(); |
| 240 |
< |
hp->uy[2] = 0.5 - frandom(); |
| 241 |
< |
for (i = 3; i--; ) |
| 242 |
< |
if ((-0.6 < r->ron[i]) & (r->ron[i] < 0.6)) |
| 243 |
< |
break; |
| 244 |
< |
if (i < 0) |
| 238 |
> |
if (!getperpendicular(hp->ux, r->ron, 1)) |
| 239 |
|
error(CONSISTENCY, "bad ray direction in samp_hemi"); |
| 246 |
– |
hp->uy[i] = 1.0; |
| 247 |
– |
VCROSS(hp->ux, hp->uy, r->ron); |
| 248 |
– |
normalize(hp->ux); |
| 240 |
|
VCROSS(hp->uy, r->ron, hp->ux); |
| 241 |
|
/* sample divisions */ |
| 242 |
|
for (i = hp->ns; i--; ) |
| 685 |
|
return(0); |
| 686 |
|
|
| 687 |
|
if ((ra == NULL) & (pg == NULL) & (dg == NULL) || |
| 688 |
< |
(hp->sampOK < 0) | (hp->ns < 9)) { |
| 688 |
> |
(hp->sampOK < 0) | (hp->ns < 6)) { |
| 689 |
|
free(hp); /* Hessian not requested/possible */ |
| 690 |
|
return(-1); /* value-only return value */ |
| 691 |
|
} |
