Common Operator Info
Normally, the output joint hierarchy is cleared of any unbound joints that aren't present in the input. With Discard Unknown Joints turned off, these nodes will be left in place. This potentially messy choice to keep unused joints is generally not necessary since joints with a lockInfluenceWeights plug connected are presumed to be bound to a skinning system and are never discarded.
The Root Node Name needs to contain the name of a group node where to place the joints, but if an appropriate Output Surface is hooked up, this field should be filled automatically. No data is piped to the Output Surface; the connection is just for identifying the group.
If the Select Node Name field changes, and is not empty, the indicated node within the generated joint hierarchy is selected by Maya. It is expected that this is not the full path name, just the leaf name, and that there is only one such leaf name in the particular joint hierarchy. This could be wired to the Pick Name output of a PuppetOp to facilitate auto-selection though its special visual interface.
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