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Related to frustum: Frustum of a Pyramid
a. the part of a solid, such as a cone or pyramid, contained between the base and a plane parallel to the base that intersects the solid
b. the part of such a solid contained between two parallel planes intersecting the solid
2. Architect a single drum of a column or a single stone used to construct a pier
The part of a solid between two cutting parallel planes.
viewing frustumIn 3D graphics, it is the area that is within the view of the user. When rendering images, graphics programmers must write routines that draw all visible objects within the viewing frustum and not waste processing time dealing with elements outside of it. See 3D graphics.
|The Viewing Frustum|
|The frustum is like a pyramid lying on its side with the tip clipped off. Everything between the near and far planes is the viewing area. (Image courtesy of Intergraph Computer Systems.)|