Orthographic or orthographic projection?

Question

3D

Orthographic or orthographic projection?
How right?

Answer 1

Both terms are used and in some cases they are used interchangeably. An orthographic projection is an orthographic projection, but an orthographic is not always orthographic. Both projections are perspectiveless projections, but there are differences in the usage of the terms.
Orthographic projection has a slightly vague definition. Orthogonal means perpendicular, that is, an orthogonal projection can be called a perpendicular projection. Perpendicular to what? This is where the divergences begin. If we assume that perpendicular means that the projection rays are perpendicular to the plane on which the image is projected, then yes, orthographic and orthogonal are interchangeable. On english wikipediait says "orthographic projection (or orthogonal projection)".
But in most cases, when they say " orthogonal projection " they mean that the projection is carried out on the plane of the coordinate axes, as in drawing : However, if we talk about computer graphics, then all the projections in the picture below, except for the top left, can be safely called orthographic, and, usually, "orthographic" is used as an antonym for "perspective": perspective / orthographic camera, perspective / orthographic matrix.
https://ru.wikipedia.org/wiki/Projection_(geometry)
https://en.wikipedia.
https://en.wikipedia.org/wiki/Orthographic_projection