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tudelft3d / City3D

Large-scale LoD2 Building Reconstruction from Airborne LiDAR Point Clouds
https://github.com/tudelft3d/City3D
GNU General Public License v3.0
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footprint #46

Closed najsdh closed 2 months ago

najsdh commented 2 months ago

Hello teacher, I have another question to ask. I'd like to know how your architectural footprint is generated. Since I now have the building footprint of an area, but store the vertex information of each building outline, I would like to know how to convert this information into a footprint file like the one provided in your project. If possible, could you please tell me what information V, Vn and Vt are in the footprint file?

LiangliangNan commented 2 months ago

In our implementation, we assume the footprint of a building is simply a polygon. Thus for a set of buildings, their footprint information is a set of polygonal faces whose Z coordinates are set to 0, and these faces are stored in an OBJ file format.