[Maya][C++]MPxDeformerNode, I want to get the original(rest) shape

Coding
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1

Hello!
I want to get the original(rest) shape.

Please teach me how to get the original shape using the MPxDeformerNode.
Can you please help me out.

2

if in a MPxCommand context,just traverse the graph with MItDependencyNodes .

if in a node compute method(), don’t do it, reconnect the graph instead.

3

That went well.
Thank you so much!