Projecting facade into terrain

Hi,
My goal is to get a projection of all facades (perpendicular to each facade) onto the terrain. It can be a four sided but also a 5 sided projection (hexagonal building), depending on the geometry of the building. These projections can be ranging from 0.5 up to 1 (75° up to 45°) for all sides, meaning scalable.

I have created a building by extruding the storeys. Then I have tried the “Shear angle” but then realising that for more facade faces it does not work. In addition it is not scalable. So the projection should be from the building attic downwards.

I am kind off stuck in this part, and would appreciate any feedback.
cheers

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I don’t know if this will help, but I made a simple demo that you can refer to.



FacadeUnfold_re.gh (8.2 KB)

hi,
Thank you very much for your fast reply

simply amazing… it works as a charm :+1:
I would have never thought about it this way… May I ask what is the 0.5 for the “Horizontal Frame” for?