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
···
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
Hi Greg,
Thanks a lot for your reply and your kind help. I will check the references, as proposed.
Regards,
Sokol
···
________________________________
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
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
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
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