Python automation, normals, and dupliverts

Question

I'm working with some huge STL models broken into multiple meshes. To automate mesh refining, I'm using this code:

import bpy

scene = bpy.context.scene
selected = bpy.context.selected_objects

for obj in selected:
    scene.objects.active = obj
    bpy.ops.object.mode_set(mode='EDIT')
    bpy.ops.mesh.remove_doubles()
    bpy.ops.mesh.normals_make_consistent()
    bpy.ops.object.mode_set(mode='OBJECT')

It takes a significant amount of time to process. Am I doing this right, or is there a quicker way, perhaps with bpy.data?

Answer 1

The equivalent using BMesh and bmesh.ops would be:

import bpy
import bmesh

for obj in bpy.context.selected_objects:

    bm = bmesh.new()   # create an empty BMesh
    bm.from_mesh(obj.data)   # fill it in from a Mesh

    d = 0.0001
    bm_verts = bm.verts[:]
    bmesh.ops.remove_doubles(bm, verts=bm_verts, dist=d)

    bm_faces = bm.faces[:]
    bmesh.ops.recalc_face_normals(bm, faces=bm_faces)

    bm.to_mesh(obj.data)
    bm.free()

But, i doubt it will be much faster.