[Radiance-general] BRTD Function to simulate grid mesh.

[Greg Ward]

Hi Lucio,

Rather than trying to debug your code, why don't you try mine?  Attached is a cal file I created for Jack DeValpine of Visarc, which should do what you want.  See if you can get it to work.

Best,
-Greg

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> From: Lucio Boscolo <Lucio.Boscolo at arup.com>
> Date: August 2, 2011 1:19:06 PM PDT
> 
> Hi everybody!
>  
> I?m trying to set up a BRTD calc file but it doesn?t seem to work, can somebody help me digging out how to deal with this, please?
>  
> What I am trying to do is to represent the mesh grid attached (image grid_mesh.png) with a plan, which material is a BRTD function. The reason why I am doing this is because I need to keep the model simple and easy to model parametrically. The aim is to get something similar to what is shown in picture example.tiff.
>  
> The idea is to use cutoff angles to decide whether or not light goes through the plan (as it does with the actual mesh).
>  
> In order to achieve this I set up a vertical plan and gave to it the following material definition which calls the attached cal file (mesh.cal):
>  
> void BRTDfunc test
> 10
> 1 1 1
> 0 0 0
> test_combo test_combo test_combo
> test.cal
> 0
> 9
> 0 0 0
> 0 0 0
> 0 0 0
>  
> But it doesn?t seem to work.
>  
> I played with all sort of parameters but it seems to  behave always the same regardless of different cutoff angles declared in the calc file.
>  
> I also tried with this material definition: 
>  
> void plasfunc test
> 2 test_combo test.cal
> 0
> 4 0 0 0 1
>  
> And it works as expected, hence, the calc file seems to work.
>  
> Any idea on what I am doing wrong or I am missing? Any idea on how to achieve the desired result?
>  
> Thank you in advance for your help!
>  
> Lucio