[Radiance-general] BRTDfunc

[Lars O. Grobe]

Hi Sierd,

if all you need to model is a clear glass pane, do not use BRTDfunc but glass. That is an optimized modifier modeling transmission and reflection for thin glass panes surrounded by air (which is a function of the direction a ray is passing through).

BRTDfunc is meant to describe transmission and reflection using the mathematical description language of Radiance (see the cal-files coming in the library). It does not make sense to use it without any mathematical model.

Cheers, Lars.

09.01.2014 tarihinde 18:10 saatinde, "Sierd Tilma" <tilma.sierd at gmail.com> şunları yazdı:

> Hello all,
>  
> I found the BRTDfunc in the reference manual off Radiance, but I don't understand fully how this function is working
>  
> I have a glass whit a transmittance of 0,8 and an reflectance of 0,08
>  
> I was thinking to do link this
>  
> void       BRTDfunc            testing_glass
> 10
>                 0.08                       0.08                       0.08                       [I was thinking this is the reflection]
>                 0.87154                0.87154                0.87154                [I was thinking this is the transmision]
>                 0                             0                             0
>                 .
> 0
> 9
>                 0             0             0
>                 0             0             0
>                 0             0             0
>  
> but this is nog working it seems like my glas is giving light
>  
>  
>  
>  
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