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）