Orthographic projection is a means of representing three-dimensional objects in two dimensions. It is a form of parallel projection, in which all the projection lines are orthogonal to the projection plane, resulting in every plane of the scene appearing in affine transformation on the viewing surface. The obverse of an orthographic projection is an oblique projection, which is a parallel projection in which the projection lines are not orthogonal to the projection plane. The term orthographic is sometimes reserved specifically for depictions of objects where the principal axes or planes of the object are also parallel with the projection plane, but these are better known as multiview projections. Furthermore, when the principal planes or axes of an object in an orthographic projection are not parallel with the projection plane, but are rather tilted to reveal multiple sides of the object, the projection is called an axonometric projection. Sub-types of multiview projection include plans, elevations and sections. Sub-types of axonometric projection include isometric, dimetric and trimetric projections.

Tutorial

"For @Topia, imagine the grid as straight up and down instead of rotated." ~ @Hayden Wu

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Contexts

• [1] Orthographic, wikipedia.org
• #topia-lexicon (See: @Topia Glossary)