RotateTool(ControlInfo*=nil)
Create a new RotateTool.
virtualManipulator*CreateManipulator(Viewer*,Event&,Transformer*)virtualvoidInterpretManipulator(Manipulator*)
CreateManipulator detects whether the user clicked on a component. If not, it clears the editor's
selection and returns a nil manipulator. If a component was hit, and if the component was not
previously selected, then CreateManipulator clears the editor's selection, selects the component
the user hit, and delegates manipulator creation and interpretation to it. If the component was
the only selected component, it again delegates manipulator creation and interpretation to the
component, but the selection is unaltered. If the user clicks on one of many selected components,
then CreateManipulator will delegate manipulator creation and interpretation to the hit component
without altering the selection.