| 21 |
|
* String arguments include the reflection function and files. |
| 22 |
|
* The BRDF is currently used just for the specular component to light |
| 23 |
|
* sources. Reflectance values or data coordinates are functions |
| 24 |
< |
* of the direction to the light source. |
| 24 |
> |
* of the direction to the light source. (Data modification functions |
| 25 |
> |
* are passed the source direction as args 2-4.) |
| 26 |
|
* We orient the surface towards the incoming ray, so a single |
| 27 |
|
* surface can be used to represent an infinitely thin object. |
| 28 |
|
* |
| 89 |
|
COLOR ctmp; |
| 90 |
|
FVECT ldx; |
| 91 |
|
double lddx[3], pt[MAXDIM]; |
| 92 |
+ |
double vldx[4]; |
| 93 |
|
register char **sa; |
| 94 |
|
register int i; |
| 95 |
|
|
| 155 |
|
} else { |
| 156 |
|
for (i = 0; i < np->dp->nd; i++) |
| 157 |
|
pt[i] = funvalue(sa[3+i], 3, lddx); |
| 158 |
< |
dtmp = datavalue(np->dp, pt); |
| 159 |
< |
dtmp = funvalue(sa[0], 1, &dtmp); |
| 158 |
> |
vldx[0] = datavalue(np->dp, pt); |
| 159 |
> |
vldx[1] = lddx[0]; vldx[2] = lddx[1]; vldx[3] = lddx[2]; |
| 160 |
> |
dtmp = funvalue(sa[0], 4, vldx); |
| 161 |
|
setcolor(ctmp, dtmp, dtmp, dtmp); |
| 162 |
|
} |
| 163 |
|
if (errno) { |
