| 111 |
|
.PP |
| 112 |
|
The |
| 113 |
|
.I Mountain |
| 114 |
< |
software operates the pg2 goniophotometer to |
| 115 |
< |
capture BSDF scattering data in separate text files for each incident |
| 116 |
< |
angle, beginning with a header |
| 114 |
> |
program, written by Peter Apian-Bennewitz, stores data taken by |
| 115 |
> |
his pg2 goniophotometer in separate |
| 116 |
> |
BSDF scattering files for each incident angle, beginning with a header |
| 117 |
|
whose lines each start with a pound sign ('#'). |
| 118 |
|
Some header settings require colons and others do not, as indicated below. |
| 119 |
|
The |
| 255 |
|
so theta=180 is the opposite side surface normal. |
| 256 |
|
This differs from the WINDOW, which use separate |
| 257 |
|
coordinate systems for the front and the back. |
| 258 |
< |
To confusing things further, notions of "front" and "back" are |
| 258 |
> |
To confuse things further, notions of "front" and "back" are |
| 259 |
|
opposite in WINDOW and RADIANCE. |
| 260 |
|
In RADIANCE, the normal of a window surface usually faces the |
| 261 |
< |
interior of a space. |
| 261 |
> |
interior of a space, where the WINDOW convention uses "FRONT" |
| 262 |
> |
for the exterior of a building. |
| 263 |
|
.PP |
| 264 |
|
In the |
| 265 |
|
.I genBSDF(1) |
