Projection plane

A projection plane, or plane of projection, is a type of view in which graphical projections from an object intersect.^[1] Projection planes are used often in descriptive geometry and graphical representation. A picture plane in perspective drawing is a type of projection plane.

With perspective drawing, the lines of sight between an object and a picture plane return to a vanishing point and are not parallel. With parallel projection the lines of sight from the object to the projection plane are parallel.

Perspective projection of triangle ABC on plane Π from point S.
Axonometric projection on projection plane Π
A cube in two-point perspective
Simulated rays of light travel from the object, through the projection plane, and to the viewer's eye or camera. This is the basis for graphical perspective.

References

↑ Gary R. Bertoline et al. (2002) Technical Graphics Communication. McGraw–Hill Professional, 2002. ISBN 0-07-365598-8, p. 330.

This article is issued from Wikipedia - version of the 11/21/2015. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.