Hi all,
I’ve been writing custom nodes in 1.0 and recently transitioned into 2.0,
but found that one of the commands or methods of retrieving a matrix MPlug
no longer works, returning a Unexpected Internal Failure, which isn’t very
descriptive. I’m hoping you can help me spot what needs to change in order
for this to work.
To reproduce:
1. Save the below to myplugin.py
2. Run the attached example
Any ideas?
Best,
Marcus
"""Can't read worldMatrix of custom node
Example:
from maya import cmds
from maya.api import OpenMaya as om
cmds.loadPlugin(r"c:\path\to\myplugin.py")
fn = om.MFnDagNode()
parent = fn.create("transform", "myTransform")
mobj = fn.create("myLocator", "myLoc", parent)
plug = fn.findPlug("worldMatrix", False)
plug = plug.elementByLogicalIndex(0)
om.MFnMatrixData(plug.asMObject()).matrix()
# RuntimeError: (kFailure): Unexpected Internal Failure
"""
from maya.api import OpenMaya as om, OpenMayaUI as omui
class MyLocator(omui.MPxLocatorNode):
name = "myLocator"
typeid = om.MTypeId(0x999999)
classification = "drawdb/geometry/custom"
@classmethod
def creator(cls):
return cls()
@classmethod
def init(cls):
pass
maya_useNewAPI = True
def initializePlugin(obj):
plugin = om.MFnPlugin(obj, "MyPlugin", "1.0", "Any")
plugin.registerNode(MyLocator.name,
MyLocator.typeid,
MyLocator.creator,
MyLocator.init,
om.MPxNode.kLocatorNode,
MyLocator.classification)
def uninitializePlugin(obj):
om.MFnPlugin(obj).deregisterNode(MyLocator.typeid)
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