Frustum

In geometry, a frustum (plural: frusta or frustums) is the portion of a solid (normally a cone or pyramid) that lies between two parallel planes cutting it.

The term is commonly used in computer graphics to describe the three-dimensional region which is visible on the screen, the "viewing frustum", which is formed by a clipped pyramid; in particular, frustum culling is a method of hidden surface determination.

In the aerospace industry, frustum is the common term for the fairing between two stages of a multistage rocket (such as the Saturn V), which is shaped like a truncated cone.

Read more about Frustum:  Elements, Special Cases, and Related Concepts, Examples

Other articles related to "frustum":

Reentry - Entry Vehicle Shapes - Biconic
... The biconic is a sphere-cone with an additional frustum attached ... of approximately 470 kg, a nose radius of 2.34 cm, a forward frustum half-angle of 10.4°, an inter-frustum radius of 14.6 cm, aft frustum half angle of 6°, and an axial ...
Moscow Mathematical Papyrus - Two Interesting Geometry Problems - Problem 14: Volume of Frustum of Square Pyramid
... Mathematical calculates the volume of a frustum ... remains unknown how the Egyptians arrived at the formula for the volume of a frustum ...
Closed Tube - Resonance of A Tube of Air - Cones
... An open conical tube, that is, one in the shape of a frustum of a cone with both ends open, will have resonant frequencies approximately equal to those of an open cylindrical pipe of the same length ... of a stopped conical tube — a complete cone or frustum with one end closed — satisfy a more complicated condition where the wavenumber k is and x is the distance from the small end of the ... and to first order the behavior does not change if the complete cone is replaced by a closed frustum of that cone ...
Viewing Frustum
... In 3D computer graphics, the viewing frustum or view frustum is the region of space in the modeled world that may appear on the screen it is the field of view of the notional camera ... region varies depending on what kind of camera lens is being simulated, but typically it is a frustum of a rectangular pyramid (hence the name) ... The planes that cut the frustum perpendicular to the viewing direction are called the near plane and the far plane ...
Frustum - Examples
... A notable example of a pyramidal frustum appears on the reverse of the Great Seal of the United States on the back of the United States one-dollar bill, the "unfinished pyramid" being surmounted by the Eye of ... Certain ancient Native American mounds also form the frustum of a pyramid ... Center in Chicago, Illinois is a frustum whose bases are rectangles ...