projection plane

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A projection plane, or plane of projection, is a type of view in which graphical projections from an object intersect.Gary R. Bertoline et al. (2002) Technical Graphics Communication. McGraw–Hill Professional, 2002. {{isbn|0-07-365598-8}}, p. 330. 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, or projection lines, 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.

File:Perspective projection of triangle ABC on plane Π from point S.svg | Perspective projection of triangle ABC on plane Π from point S.

File:Axonometric_projection.svg | Axonometric projection on projection plane Π

File:Perspectiva-1.svg | A cube in two-point perspective

File:Perspectiva-2.svg | 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.

File:Various projections of cube above plane.svg | Various graphical projections and how they are produced