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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