Identify glare from a specific glare source

Hi everyone,

I have a question about DGP. I want to assess the DGP at a certain point in my building caused by the facade across the street. What I have done is running the annual DGP simulation, then removing the building on the other side and then run it again. Then I subtracted both results to get the DGP produced by the building.

I got a suggestion (copied below) at the Radiance mailing group about a more accurate way to identify the amount of glare produced by a specific object:

"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."

Can this be done with Honeybee?

I was also advised to avoid simplified methods to calculate DGP:

"And just to be sure - don't use any of the existing simplified methods to calculate DGP (they are not based on a full rendering), because they are based on illuminance calculations using rtrace -I - in that case you will miss the specular reflection of the sun" 

I am not sure if the annual glare simulation from "Honeybee_Annual Daylight Simulation" component uses one of these simplified methods. Maybe someone can clarify that.

Thanks in advance,

Alejandro