Maya: Batch Transfer Ngskintools Weights

mbtnw.py

"""
Select targets then source last.
"""
import pymel.core as pc
from ngSkinTools.mllInterface import MllInterface


selection = pc.ls(selection=True)
targets = selection[:-1]
source = selection[-1]

skin_cluster = source.getShape().listConnections(type="skinCluster")[0]
joints = skin_cluster.listConnections(type="joint")

source_mll = MllInterface()
source_mll.setCurrentMesh(str(source))
id_by_path = {}
for info in source_mll.listInfluenceInfo():
    id_by_path[info.path] = info.logicalIndex

for target in targets:
    args = joints + [target]
    pc.skinCluster(*args)

    influences_mapping = {}

    target_mll = MllInterface()
    target_mll.setCurrentMesh(str(target))
    target_mll.initLayers()
    for info in target_mll.listInfluenceInfo():
        source_id = id_by_path[info.path]
        influences_mapping[source_id] = info.logicalIndex

    source_mll.transferWeights(str(target), influences_mapping, vertexTransferMode="closestPoint")