Is there any support for Undo in API command?

[hyungeun-kim]

I try to make a tool for mesh UV infomation.

It works as getting mesh's UV coord info and set that to another mesh.

To do that, I have to use MFnMesh.getUVs, .... and so on.

Within "GET" works, I don't have to think about "undo/redo",

But, in "SET" works, I have to concern about "undo/redo".

In this forum, I've searched about that issue, the conclusion is to create a plugin, right?

But, I hope to do that, just like a mel. (Like In mel, undoInfo -openChunk / -closeChunk)

[whisperwing]

MPxCommand::undoIt()

[joojaa]

MPxCommand::undoIt()

it doesn't actually do anything unless you actually register something to undo. Since basically the only thing that provides this is MDGMod things it does no good. But than there's really no point in using mdgmod since scripting can do all mdgmod can do.

The thing is a bit deeper than the OP is even realizing. Basically if you want to use MFnMesh to Set ANYTHING! you need to do a node. Not just a plugn but a full node. Otherwise maya in regular operation will just ignore mostly everything you do.