Predicting Patch-based diffuse Irradiance values

Greg_Ward · July 12, 2012, 4:24pm

Hi Sokol,

If you are OK using a Tregenza (or Reinhart) sky subdivision, then you can use rtcontrib to compute all the patch contributions at once. A complete explanation of the process is provided in Axel Jacobs' tutorial, with additional methods for handling BSDFs described by Andy McNeil.

Axel's tutorial: http://tinyurl.com/884plcj

Andy's tutorial: http://docs.google.com/View?id=dfjk2vdh_79ff7nxwgq

Hopefully, you can figure it out from these, but feel free to ask more specific questions.

Best,
-Greg

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From: sokol dervishi <dervishi_sokol@yahoo.com>
Date: July 12, 2012 4:11:12 AM PDT

Dear All,

I wanted to ask a question related to the prediction of the diffuse horizontal (or vertical contribution) of a particular patch of the sky ( with a specific patch altitude, solid angle, patch azimuth).

I am developing a patch-based Irradiance model and I wanted to compare with other models in Radiance , e.g.Perez Model. I know How to calculate the diffuse horizontal, or any titled surface of the whole sky, but in my case I wanted to compare in a patch-based mode. So I need to simulate a patch-based contribution of diffuse component in horizontal or any titled surface.

I thank you in advance,

Regards,

Sokol

sokol_dervishi · July 13, 2012, 9:27am

Hi Greg,

Thanks a lot for your reply and your kind help. I will check the references, as proposed.

Regards,

Sokol

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________________________________
From: Greg Ward <gregoryjward@gmail.com>
To: Radiance general discussion <radiance-general@radiance-online.org>
Sent: Thursday, July 12, 2012 6:24 PM
Subject: Re: [Radiance-general] Predicting Patch-based diffuse Irradiance values