Self-shaded meshes in freeform facade surface

I am trying to model a self-shaded freeform facade using Ladybug. The resulted mesh that I obtain from the 'shade' output from 'shadowRange' component looks incorrect or opposite. The meshes which should be sun-exposed are 'sun-shaded' in my model. Attached is the file. Need help to fix it. I would appreciate if somewone explain me the logic/algorithm to locate the 'self-shaded' meshes. Thanks. selfShadedFacade.gh

Attachments:

selfShadedFacade.gh, 403 KB

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Permalink Reply by Mostapha Sadeghipour Roudsari on April 2, 2017 at 3:36pm

Flip the test geometry!

Permalink Reply by Iasef Md Rian on April 3, 2017 at 12:42am

thanks Mostapha !...gr8 help :)

Permalink Reply by Iasef Md Rian on April 5, 2017 at 12:24pm

When I am calculating radition, it takes less time, and therefore, galapagos works smoothly. But, when I am calculating the shades (number shaded meshes) using 'shadowRange' component with the changing of parameter, it takes long time, and that is why, galapagos does not rum smoothly; in fact, it hangs. Any solution? My main aim is to do optimization of a free-from facade to get maximum number of self-shaded meshes. Thanks !

Permalink Reply by Mostapha Sadeghipour Roudsari on April 6, 2017 at 6:12am

Iasef,

Try to use sunlight hours component for a single hour. That is basically the same as what you're trying to do and it is much faster.

Mostapha

Permalink Reply by Iasef Md Rian on April 6, 2017 at 6:39am

In fact, I started my optimization with a single hour by fixing it 12:00 noon. Do I need any special command to make it 'singe hour'?

Thanks !

Permalink Reply by Iasef Md Rian on April 6, 2017 at 7:03am

Attached is the ghfile. I feel difficulty to use sunlighthours component; there is no sunvectors, so I am not able to use it for shadowRange for finding self-shading meshes. Could you please check the attached file.

Thank you so much !

Attachments:

SelfShadedFacade_Optimization.gh, 406 KB

Permalink Reply by Mostapha Sadeghipour Roudsari on April 7, 2017 at 7:03am

There is a sunvectors input! Check the attached file. If your case doesn't have direction and sunlight on both directions of the surface is acceptable then you need to test to surfaces with flipped normal and check if any of them receives sunlight for each cell.

Attachments: