[Radiance-general] BSDF reader

[Germán Molina Larrain]

Hi Aitor,

The number of the patches is from normal to tangent, looping over Thetas
and Azimuths... I think it is easier for you to see it instead of reading
it. You can go to http://www.radiance-online.org/download-install and
download the BSDF viewer, and put Show Patch Numbers.

About the units, I understand they are Incident Irradiance over Outgoing
Radiance, and the number there can be deduced as the percentage of
transmission of that transmitted by an "air" layer. In the case of Klems
(W6 standard) basis, the values for the air layer are, aproximately:

  *Patch Number* *1/cos(Θ).Ω*  1 41,9043  2-9 42,8764  10-25 45,6281  26-45
42,333  46-69 44,6724  70-93 44,6724  94-117 50,7996  118-133 45,6281
134-145 57,0215
The experts may have much more information about this.

Good Luck,

German


2013/4/22 leceta <aitorleceta at gmail.com>

> Hi all,
>
> i would like to write a BSDF/xml parser for Rhino/Grasshopper 3d modelling
> software.
>
> In order to correctly interpret the data contained in <ScatteringData>
> element in the xml file, i would appreciate to know:
>
> -The order of this data related to Klem´s patches. supposed that they are
> measuremts for each input/output direction
>
> - The units of this data. Lumens? Percentage?
>
> thanks
> aitor
>
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>
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