blender-impl-mesh

Generate high-vertex-count Blender meshes efficiently by pre-allocating vertex arrays and applying the `foreach_set()` API for bulk attribute operations. This prevents the severe performance slowdowns and memory overhead caused by per-vertex Python loops.

Your Blender mesh becomes invalid after code creation because required safety calls were skipped. Enforce `mesh.update()` and `mesh.validate()` after generating geometry to ensure the mesh is well-formed and correctly indexed across all Blender versions.

Yes, you can convert IfcOpenShell triangulated geometry into Blender meshes. For large IFC models, achieve efficient conversion by reading the triangulated data arrays and writing them via pre-allocation and `foreach_set()`.

The best way to create a simple Blender mesh from vertex and face lists is using `mesh.from_pydata()`. Reserve pre-allocation and `foreach_set()` strictly for high-vertex-count AEC meshes where bulk operations are necessary for performance.

For Sverchok-style parametric workflows in Blender, use `foreach_set()` for bulk mesh generation and BMesh when topology-changing edits like extrude are needed. Always follow `mesh.update()` and mode-appropriate handling rules to maintain valid geometry.