Perspective projections: Axis vanishing point, one point, two point and three point perspective projections

In perspective projection, a set of parallel lines not parallel to projection plane converge to a point. This point is known as vanishing point. If this point is for a set of lines that are not parallel to one of three principal axes then this point is known as axis vanishing point. These points can be maximum of three. Perspective projections are classified on the basis of axis vanishing point to one point, two point or three point perspective projections.

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