automatically connect to time1.outTime

[MatthiasBuehlmann]

Now I try it that way:


MFnDependencyNode nodeFn(thisMObject());

MGlobal::selectByName("time1");
MSelectionList selection;
MGlobal::getActiveSelectionList( selection );
MFnDependencyNode time1Fn;
MObject time1Hnd;
stat = selection.getDependNode(0, time1Hnd);
time1Fn.setObject(time1Hnd);

MPlug inPlug = nodeFn.findPlug("currentTime", true, &stat);
MPlug outPlug = time1Fn.findPlug("outTime", true, &stat);

//the code above seems to work, stat is always true

MDGModifier mdgMod;
stat = mdgMod.MDGModifier::connect(outPlug, inPlug);
stat = mdgMod.doIt(); //<- does not succeed


but here i get an error on mdgMod.doIt():

// Error: Connection not made: 'time1.outTime' -> '.currentTime'. Destination node is not in a dependency graph. //


seems the node is not added to the dependency graph during the postConstructor, nor does it have a name yet, so what can I do to create any connections in this phase?

[GennadiyKorol]

This won't be a good idea, since postConstructor is called for every MPxNode object you derive after it is created. Not the Maya scene object, but C++ runtime class instance.

That means this code will be called when file is opened even if the connection is already made.


Generally I find it simpler to do any initialization in a specially written MPxCommand or simple MEL script that is responsible for creating and initializing your node.

[MatthiasBuehlmann]

hey GennadiyKorol

Thank you - it's what i did now.

But actually it would still be interesting to know how one could code a node such that it sets up it's necessary connections (like in this case input of scenetime) itself.


thank you

[GennadiyKorol]

You could setup a global callback for node creation and setup the connections there.

I just requires more labor since all custom nodes are usually created with some MEL written UI/hotkey system and it is easier to setup those connections in that MEL code.

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