Not sure what you're hitting. That last line gives me...
om.MFnMatrixData(plug.asMObject()).matrix()
# Result: maya.api.OpenMaya.MMatrix(((1, 0, 0, 0), (0, 1, 0, 0), (0, 0, 1,
0), (0, 0, 0, 1))) #
On Tue, Dec 4, 2018 at 1:33 AM Marcus Ottosson <konstrukt...@gmail.com>
wrote:
> 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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