Electric light calculation by using IES files with Accelerad

radiance-general
1

Hi all,

I’m wondering whether it’s possible to perform electric lighting calculations on the GPU (similar to using Accelerad) by importing IES files. In other words, does anyone know how to use Accelerad to run lighting simulations with IES files that include “brightdata” materials?

Best regards,
Majid

2

Hi Majid,

Although I’m no expert on Accelerad, I don’t think @Nathaniel_Jones implemented the .cal file interface typically required to handle ies2rad output. Other software developers, such as Jon Sargent at Solemma, have implemented direct luminaire lookups to speed operations, but as I understand it, everything needs to be ported to the GPU in Accelerad, which is a bit more trouble…

Cheers,
-Greg

1 Like
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Hi @Majid_Miri and @Greg_Ward,

The brightdata primitive is partially implemented in Accelerad, which is to say that rather than reading the .cal file, Accelerad has certain commonly used routines hard coded for the GPU. In this case, Accelerad is able to use corr, flatcorr, boxcorr, or cylcorr from source.cal. Those likely cover most of the luminaires you can create with ies2rad, but if you have something highly customized, it may not work.

1 Like
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Hi Nathaniel,
Thank you so much for all your explanations. I will try to test it based on what you said.
Anyway, don’t you have any plans to update Accelerad anymore?
Best regards,
Majid