Editing Orthographic projection (section)

==Multiview projection==
[[Image:Convention placement vues dessin technique.svg|thumb|right|Symbols used to define whether a ''multiview projection'' is either third-angle (right) or first-angle (left)]]
{{main|Multiview projection}}
In ''multiview projection'', up to six pictures of an object are produced, called ''primary views'', with each projection plane parallel to one of the coordinate axes of the object. The views are positioned relative to each other according to either of two schemes: ''first-angle'' or ''third-angle'' projection. In each, the appearances of views may be thought of as being ''projected'' onto planes that form a six-sided box around the object. Although six different sides can be drawn, usually three views of a drawing give enough information to make a three-dimensional object. These views are known as [[front view]] (also ''elevation''), [[top view]] (also ''plan'') and [[end view]] (also ''section''). When the plane or axis of the object depicted is ''not'' parallel to the projection plane, and where multiple sides of an object are visible in the same image, it is called an ''auxiliary view''. Thus ''isometric projection'', ''dimetric projection'' and ''trimetric projection'' would be considered ''auxiliary views'' in multiview projection. A typical characteristic of multiview projection is that one axis of space is usually displayed as vertical.