vector relpointbbox(<geometry>geometry, vector position)
Returns the relative position of the point given with respect to the bounding box of the points in the geometry.
vector relpointbbox(<geometry>geometry, string pointgroup, vector position)
Use the bounding box of the primitives in the named point group.
When running in the context of a node (such as a wrangle SOP), this argument can be an integer representing the input number (starting at 0) to read the geometry from.
Alternatively, the argument can be a string specifying a geometry file (for example, a
.bgeo) to read from. When running inside Houdini, this can be an