Thanks for confirming, Pedro!
On Tue, 28 Aug 2018 at 04:59, Pedro Bellini <[email protected]> wrote:
> Hey,
> First there is nothing wrong with the way you got it to work.
> Second, have you tried getting the plug straight from MSelectionList() ?
> it could work for you...
>
> ie.
>
> Yeah, maybe it works. If not, your way is fine too.
> from maya.api import OpenMaya
> from maya import cmds
>
> pma = cmds.createNode('plusMinusAverage')
> plug = OpenMaya.MSelectionList().add(pma+'.input3D[1].input3Dx').getPlug(0)
>
> plug.name()
> # Result: u'plusMinusAverage1.input3D[1].input3Dx' #
> plug.asFloat()
> # Result: 0.0 #
>
> plug2 = OpenMaya.MSelectionList().add('persp.t').getPlug(0)
>
> pcst = cmds.createNode('parentConstraint')
> plug3 =
> OpenMaya.MSelectionList().add(pcst+'.target[0].targetOffsetTranslate').getPlug(0)
> plug3.name()
> # Result: u'parentConstraint1.target[0].targetOffsetTranslate' #
> plug3.isCompound
> # Result: True #
>
> plug3b =
> OpenMaya.MSelectionList().add(pcst+'.target[0].targetOffsetTranslateX').getPlug(0)
> plug3b.asFloat()
> # Result: 0.0 #
>
> # for some reason this does not work in a few of attributes (not sure why)
> # rotatePivot
> plugFail = OpenMaya.MSelectionList().add('persp.rotatePivot').getPlug(0)
> # TypeError: item is not a plug #
> cmds.objExists('persp.rotatePivot')
> # Result: True #
>
> # which makes me get it the other way you mentioned
> fnDg =
> OpenMaya.MFnDependencyNode(OpenMaya.MSelectionList().add('persp').getDependNode(0))
> plugRp = fnDg.findPlug('rotatePivot', False)
> plugRp.isCompound
> # Result: True #
> plugRp.numChildren()
> # Result: 3 #
>
>
> Cheers.
>
>
> On Monday, August 27, 2018 at 7:22:31 AM UTC-7, Marcus Ottosson wrote:
>>
>> Hi all,
>>
>> I’m looking for how to query a compound plug within an array plug, by
>> name.
>>
>> With non-compound attributes, you can query plugs using the function set.
>>
>> from maya.api import OpenMaya as om
>> node = fn.create("wtAddMatrix")
>> fn = om.MFnDependencyNode()
>> nodeState = fn.findPlug("nodeState", False)
>>
>> Likewise, I can get to the compound plug and its first index like this..
>>
>> mplug = fn.findPlug("wtMatrix", False)assert mplug.name().rsplit(".", 1)[-1]
>> == "wtMatrix"assert mplug.isArray and mplug.isCompound
>> first = mplug.elementByLogicalIndex(0)assert first.name().rsplit(".", 1)[-1]
>> == "wtMatrix[0]"
>>
>> And I can guess my way to the weightIn attribute, by grabbing it by an
>> arbitrary index.
>>
>> # wtAddMatrix# [0]# .matrixIn# .weightIn# [1]# .matrixIn#
>> .weightIn# ..
>> weigthIn = first.child(1)assert weigthIn.name().rsplit(".", 1)[-1] ==
>> "weightIn"
>>
>> But how can I get to nested the wtAddMatrix.wtMatrix[0].weightIn
>> attribute by name?
>>
>> weightIn = ... # By name?
>>
>> Seeing as it’s the function set of a node that enables findPlug(), I
>> can’t figure out how to apply this to the MPlug itself.
>>
>> For the moment, I’ve “hacked” it by iterating through children till I
>> find a match.
>>
>> for index in range(first.numChildren()):
>> child = first.child(index)
>> if child.name().rsplit(".", 1)[-1] == "weightIn":
>> return child
>>
>> But it doesn’t look right.
>>
>> Any ideas?
>>
>> Best,
>> Marcus
>>
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