hello, I`m working on python deformer plugin. It`s a node that will
hold several arrays of float values. Those arrays are all under one
compound attribute (set as array as well). I want the same workflow as
Maya blendShape, so user will run a command and add another array when
he wants. The deformer will then compute final result based on arrays
that user added.
First I have set both compound and values attributes as using
arrayDataBuilder, but this only works under the node, not in the
command. But the array creation in the node would need to be triggered
by command somehow.
What I`m doing now is trying to use MPlug in command using
selectAncestorLogicalIndexwhich could create the data, but I`m getting
different errors as if the array couldn`t be made - maybe auto-
creation only works on single value elements?
Then I have another idea, to make int attribute on a node with number
of arrays. The node would always create one more array if the int
value is the same as current size of array. The command would change
this value to value+1 and so on. This way there would always be one
"free" array for the command to use it and set values. But it sounds
hacky... does anyone know the right way of doing this?
this is part of the command, array creation part (which doesn`t work):
#compound attr
listPlug = OpenMaya.MPlug( deformNode, deformerName.list )
listSize = listPlug.numElements()
#values attr
valuesPlug = OpenMaya.MPlug( deformNode, deformerName.values )
valuesPlug.selectAncestorLogicalIndex( listSize,
deformerName.list )
pointSize = 1000 #example, size of mesh points
for i in range( pointSize ):
valuesPlug.selectAncestorLogicalIndex( i,
deformerName.values )
valuesPlug.setValue( 1.2 ) #some value
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http://groups.google.com/group/python_inside_maya
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