The Bounder handle is used to define a bounding region, for example, the
region to include in a group sop operation.

Parameters:

    boundtype   - Whether to bind as a box or as a sphere.
    onoff       - Whether the handle is visible, 1 means visible.
    sx, sy, sz  - The size of the created bounding region.
    tx, ty, tz  - The center of the created bounding region.

See Also: None
