Hi Stephen, this is a snippet that Ivan posted for one of his scripts
that does the job. Unfortunately there isn't a way before 6.3 to force
the validation of the node, so you will have to do something like
this, I have also done similar things executing dummy write nodes.
# Add a CurveTool for the forced-evaluation hack
temp = nuke.nodes.CurveTool()
n['translate'].setAnimated()
# Loop through the framerange
for frame in f:
nuke.execute(temp, frame, frame)
pos = nukescripts.snap3d.centroid(nukescripts.snap3d.selectedPoints())
n['translate'].setValue(pos)
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