hello
I am new to api and I am starting with something quite simple. Just making
a cube.
Everything goes ok until I try to give it the default material. A problem
with the connection between the 'polySurfaceShape1.instObjGroups' to
'initialShadingGroup.dagSetMembers'
here is the code:
import maya.OpenMaya as OpenMaya
"""------ NODOS SUELTOS -----"""
#--[DG NODES]--#
# polyCube
mFnDependencyNode_pCubeHistory = OpenMaya.MFnDependencyNode()
objPolyCube = mFnDependencyNode_pCubeHistory.create("polyCube",
"myPolyCubeName") #el tipo de nodo existente, designado en ayuda por typeId
#--[DAG NODES]--#
# transform
mFnDagNode_pCubeTransform = OpenMaya.MFnDagNode()
objPolyTrans = mFnDagNode_pCubeTransform.create("transform")
# cube shape
mFnDagNode_pCubeShape = OpenMaya.MFnDagNode()
objPolyShape = mFnDagNode_pCubeShape.create("mesh", objPolyTrans)
#--[retrive initialShadingGroup]--#
mSelectionList = OpenMaya.MSelectionList()
mSelectionList.add("initialShadingGroup")
mObject_initShdGrp= OpenMaya.MObject()
mSelectionList.getDependNode(0,mObject_initShdGrp)
initShadingNode = mObject_initShdGrp.apiTypeStr()
mFnDependencyNode_initialShadingGroup = OpenMaya.MFnDependencyNode()
mFnDependencyNode_initialShadingGroup.setObject(mObject_initShdGrp)
name = mFnDependencyNode_initialShadingGroup.name() # Result:
initialShadingGroup, so it ok so far
"""------ CONNECTIONS WITH MDGMODIFIER -----"""
mDgModifier = OpenMaya.MDGModifier()
# polyCube-->shape connections
srcPlug = mFnDependencyNode_pCubeHistory.findPlug("output")
destPlug = mFnDagNode_pCubeShape.findPlug("inMesh")
mDgModifier.connect(srcPlug, destPlug)
# shape-->shader connections
meshOutPutPlug = mFnDagNode_pCubeShape.findPlug("instObjGroups")
initShadingGroupInPutPlug = mFnDependencyNode_initialShadingGroup.findPlug(
"dagSetMembers")
mDgModifier.connect(meshOutPutPlug, initShadingGroupInPutPlug)
mDgModifier.doIt()
# Error: Connection not made: 'polySurfaceShape1.instObjGroups' ->
'initialShadingGroup.dagSetMembers'. Source node will not allow the
connection. #
# Error: RuntimeError: file
S:\Maya_2016_DI\build\Release\runTime\Python\Lib\site-packages\maya\OpenMaya.py
line 2889: (kFailure): Unexpected Internal Failure #
I don´t understand why the connection can´t be made
thanks
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