View Full Version : Get worldMatrix idx w/Python?

01 January 2013, 12:43 AM
I'm working with instances and I want to determine which worldMatrix[] they are linked to.
So if'transform34|fridgeDoor|fridgeDoorShape', dag=True, ap=True)
returns 3 instances, how do I find out which worldMatrix each is connected to?

01 January 2013, 01:16 AM
I think you want
cmds.listRelatives('transform34|fridgeDoor|fridgeDoorShape', f=True, ap=True)

this should return the list of unique transform nodes

01 January 2013, 02:54 AM
That does return the transform nodes, but I need shapeNode. worldMatrix[X] so I can connect it to a pfxToonShape along the lines of this:
cmds.connectAttr (shapeTmp+'.outMesh', 'pfxToonShape.inputSurface[' + str(nextToonIdx) + '].surface')
cmds.connectAttr (shapeTmp+'.worldMatrix[X]', 'pfxToonShape.inputSurface[' + str(nextToonIdx) + '].inputWorldMatrix')

01 January 2013, 08:41 AM
So get the name of the shapes by listing relatives of type mesh, and connect their worldMatirx attribute/plug in an eval command.

01 January 2013, 02:52 PM
The command in the OP returns the shapeNodes.
Do you have code for "connect their worldMatirx attribute/plug in an eval command"?

01 January 2013, 03:11 PM
Sorry, I don't follow. The connectAttr in your second post should do it, you asked how to get the shapes. What exactly are you missing? Can you supply a full example / code (e.g. use a sphere mesh) that construct the objects (use the echo all in the script editor), and tell us exactly what's not working?

01 January 2013, 05:14 PM
The connectAttr requires a .worldMatrix index. In my post I used .worldMatrix[X], because that's what I'm trying to figure out.
However, following your suggestion, I created a simple test scene and discovered that there is a better way(?) to connect an instance to the pfxToonShape:
instanceTransform.worldMatrix[0] to the pfxToonShape.inputSurface[X].inputWorldMatrix
and connect the
shape node.outMesh to pfxToonShape.inputSurface[X].surface
In fact, it doesn't appear that the shapeNode contains a worldMatrix[] attr for each instance.
Thanks for the suggestion.

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01 January 2013, 05:14 PM
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