Hello,
I understand your assignment, but from what I read it seems you that you have done nothing. In order to help here are some
Assumptions
You have some 3D models of buildings (20 x 40 ?)
Analysis
Rotate all 3d models,
Make the bounding box of all models
Measure the projected surface, length, and width of the bounding boxes
Sort by area
Use Max Length And Max Width plus an offset to array
That’s all.
There is an example not far from what you need here