Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
Hi Stephen,
The rmtxop -fc outputs an HDR image of the "Transmission Front" matrix if it is present. Otherwise, it flips the "Transmission Back" matrix around appropriately for the Klems coordinate system to compute the forward matrix assuming reciprocity.
In either case, the values will not match those shown in Andy's BSDFviewer because rmtxop multiplies each matrix entry by the projected solid angle corresponding to the incident Klems patch to derive values appropriate for a flux transfer calculation. Even a constant (Lambertian) BTDF will not end up constant in the output due to this flux conversion.
Hope this helps! -Greg
| | 2 | No.2 Revision |
Hi Stephen,
The rmtxop -fc outputs an HDR image of the "Transmission Front" matrix if it is present. Otherwise, it flips the "Transmission Back" matrix around appropriately for the Klems coordinate system to compute the forward matrix assuming reciprocity.
In either case, the values will not match those shown in Andy's BSDFviewer because rmtxop multiplies each matrix entry by the projected solid angle corresponding to the incident Klems patch to derive values appropriate needed for a flux transfer calculation. Even a constant (Lambertian) BTDF will not end up constant in the output due to this flux conversion.
Hope this helps! -Greg
