Hello!

Need help getting correct matrix values in a custom Maya transform node. I am subclassing Maya’s transform node to compute and output custom translate\rotate values.

if I try to get the node’s matrix values (worldMatrix or parentInverseMatrix) in the compute function of the transform node, those values are not correct. This is how I try to get the data:

```
def compute(self, plug, data):
handle = data.inputValue(self.parentInverseMatrix)
transformMatrix = OpenMayaMPx.MPxTransformationMatrix(handle.asMatrix())
```

Using `self.baseTransformationMatrix`

does return a matrix with expected values. However, how would I go about getting the parentInverseMatrix of the node?

Getting values from other properties such as translate, and rotate does return the values I expect to get.

```
handle = data.inputValue(self.translate)
vector = handle.asVector()
```

Thanks in advance for the help!