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A clipping plane is a world space plane lying perpendicular to the viewing direction and used to specify which objects are to be considered visible. Two clipping planes are used: the near plane and far plane also know as the hither clipping plane and yon clipping plane respectively. The planes are specified by a distance from the view point in the viewing direction. Under perspective projection, the near plane will always lie closest to the view point. Parts of objects that do not lie between the clipping planes are not rendered. See also
clipping, hither clipping plane, and
yon clipping plane.
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