* Push down the parameters in order for filtering to be done as early as possible w.r.t the view port. * Add view_port-based filtering in the lower-layers of the DB. * Implement PartialOrd on Position, to simplify point in box checks.
* Push down the parameters in order for filtering to be done as early as possible w.r.t the view port. * Add view_port-based filtering in the lower-layers of the DB. * Implement PartialOrd on Position, to simplify point in box checks.