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)) |
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--; ) |