OdDbRegion::subIntersectWith (const OdDbEntity*, OdDb::Intersect, OdGePoint3dArray&, OdGsMarker, OdGsMarker)

Finds the intersections of the specified entity with all the edges of the region's bounding box.

OdDbRegion::subIntersectWith (const OdDbEntity*, OdDb::Intersect, const OdGePlane&, OdGePoint3dArray&, OdGsMarker, OdGsMarker)

Projects the bounding box edges of the region and the specified entity onto the specified plane, finds the intersection points for the projections and then projects them back onto the bounding box edge of the region.