Method and apparatus for processing a pick event

摘要

A method for processing whether a coplanar object intersects a picking volume. This method includes displaying the object on a display. This method also includes first calculating whether a plane containing the displayed object intersects any edges of the picking volume. This method further includes subsequently calculating whether the displayed object and the picking volume intersect when the plane of the object is determined to intersect any edges of the picking volume, and providing an indication whether the displayed object intersects the picking volume. In addition, an apparatus for processing whether a coplanar object intersects a picking volume. This apparatus includes a first apparatus for determining whether a plane containing the object intersects any edges of the picking volume and a second apparatus for determining whether the object and the picking volume intersect when the plane of the object is determined to intersect any edges of the picking volume.