You can build two kind of buildings in this wizard.
1. A rectangular building with support columns and beams.
2. A polygon shaped or irregular building. It can be build with either defining the coordinates in a list or
drawn by free hand.You have to add support columns and beams afterwards.
Link to:
How to define a rectangular building.
Link to:
How to define an irregular building
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Rectangular building
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Polygon shaped building
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