How to generate CollisionShape2D from MeshInstance2D or Blender?

akjams · Oct 5, 2024

Done so far:

Created a 2D mesh in Blender:
Exported to .obj and set as MeshInstance2D's mesh via "Load" menu in editor

What is the recommended way to create a CollisionShape2D from a mesh?

CollisionShape2D doesn't allow "Load" shape from file types: .blend .obj .glb .dae
MeshInstance3D > "Create Collision Shape" dialogue is similar, but isn't available for MeshInstance2D
Sprite2D's "Create CollisionPolygon2D Sibling" is similar, but isn't available for MeshInstance2D

akjams · Oct 6, 2024

Related:
code linked from that thread: https://github.com/Norodix/ButterflyEvolution/blob/master/Source/World/GeneratePolygonFromMesh.gd

I removed the center vertex, exported to .obj & adapted that code to godot 4. It made this. Almost perfect:

Instead of giving the outer vertices to CollisionPolygon2D's algorithm, I would prefer to re-use the faces from blender. Toolscript using MeshDataTool seems like the right approach.