===== Form =====

A **form** is a conceptual reference to a three-dimensional unit. A form has height, width, and depth and is defined by points, lines, and planes. In a two-dimensional application, a form is an illusion created through the use of [[depth_cues|depth cues]]. In a three-dimensional application, a form //actually// exists.

Form differs from [[shape|shape]]. A shape can refer to a three-dimensional unit but it can also refer to a two-dimensional unit. Form **always** refers to a three-dimensional unit.


Alternate terms: object, volume


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Three depictions of //form//. \\ 
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{{:1a3e5.jpg?nolink|}}\\ 
Though similar, these two units are not //form// because they do not depict a three-dimensional unit. 
(They are still shapes, however.)