| 179 |
|
with a '.' or '~' character. |
| 180 |
|
This file must contain an LBNL Window 6 XML specification of a valid |
| 181 |
|
BSDF for the given surface, and all rays will be interpreted through |
| 182 |
< |
this function. |
| 182 |
> |
this function, which may be produced by the Radiance |
| 183 |
> |
.I genBSDF(1) |
| 184 |
> |
program. |
| 185 |
|
The orientation of the BSDF may be controlled with the |
| 186 |
|
.I u |
| 187 |
|
setting, described below. |
| 186 |
– |
The thickness of the surface may be controlled with the |
| 187 |
– |
.I t |
| 188 |
– |
setting. |
| 188 |
|
If this variable has no setting or an integer is specified, |
| 189 |
|
.I mkillum |
| 190 |
|
returns to the default behavior of computing the output distribution |
| 226 |
|
.I real |
| 227 |
|
in world coordinates. |
| 228 |
|
This value is used for determining where to start rays that need to begin |
| 229 |
< |
on the opposite side of the surface, specifically to compute the incoming |
| 230 |
< |
distribution for a BSDF computation. |
| 231 |
< |
The default value is 0. |
| 229 |
> |
on the opposite side of a fenestration system, specifically |
| 230 |
> |
to compute the incoming distribution for a BSDF computation. |
| 231 |
> |
If the thickness is set to 0 and a BSDF contains detailed geometry, |
| 232 |
> |
it will be translated and output as part of the new description, provided the |
| 233 |
> |
.I l- |
| 234 |
> |
option is also in effect. |
| 235 |
> |
(This currently works only for rectangular polygons.)\0 |
| 236 |
> |
The default thickness is 0. |
| 237 |
|
.SH EXAMPLES |
| 238 |
|
The following command generates illum's corresponding to geometry |
| 239 |
|
in the files "it1.rad" and "it2.rad": |
| 250 |
|
Work on this program was initiated and sponsored by the LESO |
| 251 |
|
group at EPFL in Switzerland. |
| 252 |
|
.SH "SEE ALSO" |
| 253 |
< |
oconv(1), rad(1), rpict(1), rtrace(1), rvu(1) |
| 253 |
> |
genBSDF(1), oconv(1), rad(1), rpict(1), rtrace(1), rvu(1) |
