如何在没有 GUI 应用程序的情况下在 Python 中固化 3D STL 文件（例如：Blender、MeshLab 等）

Question

I am trying to solidify/add thickness to a 3D STL file for a research project.

So far, I can do that in Blender, but I don't want to solidify the object in Blender.

Are there other ways to solidify/add thickness to the STL file using commands/Python script without GUI application (like Blender, MeshLab, etc.)?

Answer 1

Parse the STL file using whatever method you like (I've previously posted some Python STL parsing code here , but you could also use any existing libraries).

Then, identify all boundary edges. Each facet has 3 edges, which you can hash by their indices and count how many times each edge is found in the mesh. Boundary edges will only be found once.

For each triangle, make a copy, flip it, and move its vertices by some amount in the direction of the copied triangle's normal.

If the triangle had any boundary edges, you must generate 2 triangles per boundary edge to connect both the original and copied triangle.