Diva daylight Analysis results seem odd, any ideas what could be the problem?

Hi There,

I just modeled a very simple room with one window, when I run Diva for Grasshopper I get very strange illuminance values, I get very high values around all 4 interior wall edges and very low values in the middle of the room ? please help, I need to solve this problem in a quick manner because it is a school project.

also I noticed that the analysis mesh face normal says (0,0,-1) , isn't it supposed to be (0,0,1) may be that's what is causing the very odd results?

Attachments:

EF_Flat_cg.gh, 30 KB

Replies to This Discussion

Permalink Reply by Mostapha Sadeghipour Roudsari on April 16, 2014 at 10:45pm

I don't have DIVA so I cannot test your file but 0,0,-1 can be the reason of the issue. You probably need to flip the base surface (or just reverse the vectors).

Permalink Reply by Ninja on April 16, 2014 at 11:04pm

Thanks for the tip, I just reversed the surface normal, still no luck! The results are still strange.

Permalink Reply by Vicente Soler on April 17, 2014 at 12:12am

The problem is that the perimeter vertices of the mesh you are calculating are touching the outside surface of the walls, so light is leaking to them. Add a small gap by offsetting the horizontal surface a bit to the inside.

Permalink Reply by Ninja on April 18, 2014 at 5:40pm

Thanks, you saved my life . I really appreciate your help.

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