muv_wsuv_ops.py 文件源码

def execute(self, context):
        props = context.scene.muv_props.wsuv
        obj = bpy.context.active_object
        bm = bmesh.from_edit_mesh(obj.data)
        if muv_common.check_version(2, 73, 0) >= 0:
            bm.verts.ensure_lookup_table()
            bm.edges.ensure_lookup_table()
            bm.faces.ensure_lookup_table()

        if not bm.loops.layers.uv:
            self.report({'WARNING'}, "Object must have more than one UV map")
            return {'CANCELLED'}
        uv_layer = bm.loops.layers.uv.verify()

        sel_faces = [f for f in bm.faces if f.select]

        # measure average face size
        scale = 0.0
        for f in sel_faces:
            scale = scale + calc_face_scale(uv_layer, f)

        props.ref_scale = scale / len(sel_faces)

        return {'FINISHED'}