材质相关

• 通过材质节点获取模型shape

# api
import maya.api.OpenMaya as om
list = om.MSelectionList()
list.add("initialShadingGroup")
obj = list.getDependNode(0)
grp = om.MFnSet(obj)
members = grp.getMembers(True)

for i in range(members.length()):
    print members.getDagPath(i)
    
    
# pymel
import pymel.core as pm
len(pm.sets(x[0], union=x[0]))
# Result: 64 #
len(pm.sets(x[1], union=x[0]))
# Result: 235 #
len(pm.sets(x[0], union=x[1]))
# Result: 235 #
len(pm.sets(x[1], union=x[1]))
# Result: 171 #

• 材质节点类型**<class ‘pymel.core.nodetypes.ShadingEngine’>**
• 列出所有材质节点

import pymel.core as pm
[i for i in pm.ls(type='objectSet') if i.type() == 'shadingEngine']

• 材质节点与模型没有链接，是材质球的shadingGroup sets里包含物体或面

• 选择sets cmds.select（newSet1，noExpand = True）