[Radiance-general] material trans and glass?

[Jack de Valpine]

Hi Victor,

The setting for trans are confusing to say the least (might be worth 
searching the archives for threads on the topic). The mapping between 
trans and something like glass is not 1:1. Note also that the Radiance 
glass material uses "transmissivity" not transmittance, this term can be 
calculated from transmittance. How did you figure out the parameters 
that you have for your trans material?

-Jack

-- 
# Jack de Valpine
# president
#
# visarc incorporated
# http://www.visarc.com
#
# channeling technology for superior design and construction



Victor Li wrote:
> Dear everyone:
>
> in material definition, trans is a special type of glass. i used trans 
> to define a glass like the following:
>
> void trans window
>
> 7     0.325 0.325 0.325 0 0 1 0.3
>
> in glass definition we can do like the following
>
> void glass window
>
> 3     0.325 0.325 0.325
>
> i used the different definition to simulae daylight illuminance and i 
> found the result is different. Would you tell me what the two 
> difference is?
>
> Best Regards!
>
>
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