The Clay Translate handle is used to define a point on a surface and
an offset from that point.  This is used by the Clay SOP to describe
simple clay operations.

Parameters:

    input       - A group field.  These primitives are used for the
                  picking, etc.
    onoff       - Whether the handle is visible, 1 means visible.
    tx, ty, tz  - The delta offset from the point on the surface.
    u, v        - The u, v coordinates of the chosen point on the
                  surface.

See Also: None
