That was my first stab at it, but I kept getting the TypeError being thrown
complaining it needed a 'MFnArrayAttrsData::Type &' so my first/best guess
was that I need to pass the function a pointer to the value which sort of
led me down the MScriptUtil path.
Here's the call:
if
(inputPPData.checkArrayExist("fish",OpenMaya.MFnArrayAttrsData.kVectorArray)):
print('yay')
which still throws the TypeError - it's eminently possible I've mangled it
somehow, but I can't for the life of me see what it might be? There's this
half thought about what might be the issue every time I look at it, but
like chasing rainbows it's always _just_ out of reach..
On Tuesday, October 30, 2012 2:28:27 AM UTC+8, Jesse Capper wrote:
>
> Have you tried passing OpenMaya.MFnArrayAttrsData.kVectorArray in directly
> instead of passing it through MScriptUtil?
>
> On Wednesday, October 24, 2012 9:46:29 PM UTC-7, Anthony Tan wrote:
>>
>> Just building a custom force node and one of the things I'm trying to do
>> is patch in some dynamic PP variables that should be wrapped up with the
>> .cvar.MPxFieldNode_mInputPPData reference. I can quite happily list all
>> the PP attrib names that are being picked up but I'm having some (okay, a
>> lot) of trouble trying to leverage the checkArrayExist method.
>>
>> Don't suppose anyone has any suggestions on where else to hunt around in?
>> If there's a devkit example I've missed (I'm reading heavily off
>> dynExprField right now) or similar, would love to be pointed at it. Noting
>> of course, if this isn't strictly possible/sane/there's a better way, then
>> happy to be pointed in that direction too, not picky, more curious at this
>> stage.
>>
>>
>> Here's the relevant code fragment (it's embedded in the compute() of a
>> custom field deriving from MPxFieldNode ):
>>
>> aInputPPData = OpenMayaMPx.cvar.MPxFieldNode_mInputPPData
>> mhInputPPData = block.inputArrayValue(aInputPPData)
>> mhInputPPData.jumpToElement(plugIndex)
>> hInputPPData = mhInputPPData.inputValue()
>> dInputPPData = hInputPPData.data()
>> inputPPData = OpenMaya.MFnArrayAttrsData(dInputPPData)
>>
>> # okay, this is fine, I'll get the list of names
>> sys.stderr.write(inputPPData.list())
>>
>> # the docs say if i'm trying to use enum types, I should be using a
>> pointer
>> # to a short int.. okay. I can understand that. I think.
>> msu = OpenMaya.MScriptUtil(OpenMaya.MFnArrayAttrsData.kVectorArray)
>> fieldexists = inputPPData.checkArrayExist("fish",msu.asShortPtr())
>>
>> With the error being:
>>
>> # Traceback (most recent call last):
>>
>> # File
>> "C:/Users/tanantish/Documents/maya/2012-x64/plugins/simpleField2.py", line
>> 149, in compute
>>
>> # fieldexists = inputPPData.checkArrayExist("fish",msu.asShortPtr())
>>
>> # File
>> "c:\buildforge\Maya_2012_Win64_Build\build\wrk\optim\runTime\Python\Lib\site-packages\maya\OpenMaya.py",
>>
>> line 3859, in checkArrayExist
>>
>> # TypeError: in method 'MFnArrayAttrsData_checkArrayExist', argument 3 of
>> type 'MFnArrayAttrsData::Type &' //
>>
>>
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