[Radiance-general] DGP

[J. Alstan Jakubiec]

Hi Alejandro,

One option is to run the evalglare program with the -d and -c parameters.
 > evalglare -d -c check.hdr image.hdr

This will do two things: (*1*) the -d option will give you a list of all 
contrast-based glare sources, including reflections from your facade; 
(*2*) the -c option will colour the separate contrast-based glare 
sources randomly in the check.hdr file. You can even plug the values 
from 1 into the contrast half of the DGP equation.

Of course running the calculations either with the building as a black 
hole or (more realistically) as not present at all produces some 
comparative value as well.

Best,
Alstan

On 4/22/2015 9:58 PM, Alejandro Pacheco Diéguez wrote:
>
> Hi everyone,
>
> I have a question about DGP.
>
> I want to assess the DGP at a certain point in my building caused by 
> the façade across the street.
>
> What I have done is running the simulation DGP simulation, then 
> setting the facade as a black body and run it again (this way I 
> account for everything but the façade). Then I subtracted both results 
> to get the DGP produced by the façade.
>
> However, I am kind of suspecting that DGP is not that simple (since it 
> also considers factors like contrast) and one cannot operate with it 
> in that way.
>
> If so, can someone think of an alternative way to measure glare 
> produced by a certain elemhent?
>
> Thanks in advance,
>
> Alejandro
>
>
>
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