I second Chad Vernon`s comment and suggest using the
setDependentsDirty method for this purpose.
At 03:20 04.09.2011, you wrote:
Try using myNode.thisMObject() instead of OpenMaya.MObject(), thus
removing the need to have a myMojbect at all....
Also, the callback function needs to have and only have the arguments
found in MNodeMessage::MAttr2PlugFunction. If *args
isn't that, then it isn't going to work...
On Sep 3, 5:10 pm, johnvdz <john.vanderz...@gmail.com> wrote:
> thanks guys.
>
> this is basically what i have.
>
> class myNode(OpenMayaMPx.MPxDeformerNode ):
> myMobject=OpenMaya.MObject()
> def __init__(self):
> OpenMayaMPx.MPxDeformerNode.__init__( self )
> def postConstructor(self):
>
> attrChangedCBId=OpenMaya.MNodeMessage.addAttributeChangedCallback(
> myNode.myMobject, myNode.attrChangedCallback, self)
> def attrChangedCallback(*args):
> print 'this node callback is working'
>
> however i generally get a
>
> # RuntimeError: (kInvalidParameter): Unexpected Internal Failure //
> this is in the post constructor.
>
> not sure if i have implemented it wrong
>
> john
>
> On 09/04/2011 05:44 AM, Chad Vernon wrote:
>
>
>
>
>
>
>
> > You can also use setDependentsDirty to check when things change.
>
> > On Sat, Sep 3, 2011 at 12:33 PM, notanymike <notanym...@gmail.com
> > <mailto:notanym...@gmail.com>> wrote:
>
> > In c++ I usually install it in MPxNode's postConstructor method and
> > remove it in it's ~MPxNode method
>
> > However I don't know what the "~" equivalent to Python is...
>
> > On Sep 3, 7:49 am, johnvdz <john.vanderz...@gmail.com
> > <mailto:john.vanderz...@gmail.com>> wrote:
> > > hi all,
>
> > > i'm really scratching my head here. anyone know of an example
> > out there
> > > for attributeCallbacks
> > (MNodeMessage.addAttributeChangedCallback) within
> > > a deformer or mpxnode.
>
> > > not sure if i should be putting this in the __init__ func or in
> > its own
> > > custom constructor.
>
> > > I'm not really sure about what its passing how to deal with what it
> > > passes so any examples would be great. Google search doesn't
> > bring up
> > > much python stuff.
>
> > > i need to be able to pass some message to update for the node to
> > > recalculate an array of values.
>
> > > thanks in advance
>
> > > john
>
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