I am creating a array plug array and stuck at adding elements to the
array plug ("'sub' elements to each 'parent' element).
#When an gradient element is created, create a cooresponding
weight
index
if plug.isElement() and plug.array() ==
averageWeightsNode.gradient:
weightBuilder = weightHandle.builder( )
weightElement = weightBuilder.addElementArray(
plug.logicalIndex
() )
weightHandle.set(weightBuilder)
The code adds the new array element correctly but I can't seem to add
elements to the new added array. I tried to use before and after the
addElementArray, including after the 'set' which did not work.:
weightBuilder.setGrowSize(10)
weightBuilder.growArray(10)
I tried to create another builder which crashed Maya every time.
weightElementBuilder = weightElement.builder()
Which was mention at:
http://groups.google.com/group/python_inside_maya/browse_thread/thread/a55f2d3cbc92e902/5085c6781162243e?hl=en&lnk=gst&q=MArrayDataBuilder#5085c6781162243e
"Unfortunately this won't actually work because there is currently a
bug in the Python interface for MArrayDataBuilder such that the code
... will crash as soon as you try to retrieve the handle's builder. "
I tried after the weightHandle was set and got the following error:
weightHandle.jumpToElement( plug.logicalIndex() )
weightElementBuilder = weightHandle.outputArrayValue()
# weightElementBuilder = weightHandle.outputArrayValue()
# RuntimeError: (kInvalidParameter): Data is not an array #
Also tried:
weightElementBuilder = weightElement.outputArrayValue()
# weightElementBuilder = weightElement.outputArrayValue()
# RuntimeError: (kFailure): Object does not exist #
Both the array and its array are set:
cAttr.setArray(1)
cAttr.setReadable(1)
cAttr.setUsesArrayDataBuilder(1)
Thanks for any insight on getting an array plug array to added "sub"
elements correcty.
On a side note I found a strang bug when adding attributes
a...Node.gradient_FloatValue = nAttr.create( "gradient_FloatValue",
"gv", OpenMaya.MFnNumericData.kFloat, 0.0 )
Will automatically add the first element Gradient[0], now if I change
the line to gradient_floatValue it will not add the Gradient[0], when
its created. Well maybe its because the attribute name is the same as
the MObject? If I change gradient_FloatValue to gradient_FloatValues,
it will create the Gradient[0] again. If I keep it at
"gradient_FloatValue" and change the order when the attributes are
added as children to gradient, it will not add Gradient[0].
Not a true issue, I can deal with the attribute being named
gradient_floatValue since it does not compromise the plug-in.
-brian
www.meljunky.com
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http://groups.google.com/group/python_inside_maya
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