validate_normals.py 文件源码

def process(self, instance):
        from maya import cmds

        invalid = list()
        for mesh in cmds.ls(instance, type="mesh", long=True):
            faces = cmds.polyListComponentConversion(mesh, toVertexFace=True)
            locked = cmds.polyNormalPerVertex(faces,
                                              query=True,
                                              freezeNormal=True)

            invalid.append(mesh) if any(locked) else None

        # On locked normals, indicate that validation has failed
        # with a friendly message for the user.
        assert not invalid, (
            "Meshes found with locked normals: %s" % invalid)

        self.log.info("The normals of \"%s\" are correct." % instance)