Using OpenMaya.MFnArrayAttrsData.checkArrayExist()

[Szabolcs]

Hi,

I'd like to query the datatype of an array used by a particle instancer node. There is a call in the API to check whether the specified attribute exists with the given datatype, but I have a hard time setting the actual type.
It requires a reference to OpenMaya.MFnArrayAttrsData.kIntArray and I suppose I have to use some kind of an MScriptUtil nightmare but I can't get it to work with createFromInt() or asIntPtr()

I call OpenMaya.MFnArrayAttrsData.checkArrayExist()

And the error message is:
# Error: TypeError: file S:\Maya_2015_DI\build\Release\runTime\Python\Lib\site-packages\maya\OpenMaya.py line 4759: in method 'MFnArrayAttrsData_checkArrayExist', argument 3 of type 'MFnArrayAttrsData::Type &' #

Cheers,
Szabolcs

[Janos Hunyadi]

Maybe this might be helpfull:

http://soup-dev.websitetoolbox.com/post/advanced-particle-instancer-5539968?trail=15

J

[Szabolcs]

Thanks Janos,

Sadly I did not find the proper solution in that thread, but I've managed to make a workaround for this specific case. I assume that the SOuP copier node uses an int array to store the object indices, instead of a float array that the Maya particles use internally. Curious when this script will break next time, though... :)

Cheers,
Szabolcs