In my script I’m trying to:
- Create a metaball object (works)
- Add metaball elements to it (works)
- Convert it to a mesh (returns empty mesh)
- Store the data in a bmesh (works, but is of course still empty)
- Delete the metaball object (works)
I’d like to understand, why my mesh is always empty and to fix the underlying issue.
My source code:
# Create metaball object
mball = bpy.data.metaballs.new("TempMBall")
mball_obj = bpy.data.objects.new("TempMBallObj", mball)
context.view_layer.active_layer_collection.collection.objects.link(mball_obj)
# Add one element to it
ele = mball.elements.new()
ele.co = (0.0,0.0,0.0)
ele.use_negative = False
ele.radius = td.sk_base_radius / td.sk_min_radius
print([ele for ele in mball.elements]) # Make sure there is data in mball (there is)
# Convert it to a mesh
mball_mesh = mball_obj.to_mesh()
print([v for v in mball_mesh.vertices]) # Empty!
# Store copy of the mesh in a bmesh for further manipulation
bm = bmesh.new()
bm.from_mesh(mball_mesh) # Still empty!
# Delete metaball object
bpy.data.objects.remove(mball_obj)
bpy.data.metaballs.remove(mball)
# My custom mesh manipulation and writing the bmesh into a different object
bm.free()