settAttr outside the undo queue on TimeChanged

[AronDurkin]

Hey Folks

I've got a scriptNode with "setAttr" on a string attribute in on timeChanged, this is filling up the undoQueue and annoying people. Can I efficiently get it out of the undo stack or set a stringg attr some other way? Genereally I'd like scriptNodes and scriptJobs to not be in the undo stack. 

Thanks

[stuzzz]

I believe that the OpenMaya commands have no history record.

The solution would be to use the MPlug class

Here's a C++ snippet, you can switch to python if needed.

MFnDependencyNode plugFn(nodeObj);
MPlug plug = plugFn.findPlug(plugname, false);
plug.setXXX(value);

[AronDurkin · Accepted solution]

thanks, is this preferable / more performant (if called from python API) than putting the setAttr into "eval -ue 0" which I recently tried?

[stuzzz]

It's a matter of a fraction of microseconds. It won't alter your performance at all.