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vertex

A point in three-dimensional space.

vertices

Preferred plural of vertex. See vertex.

viewpoint

The origin of either the eye- or the clip-coordinate system, depending on context. For example, when discussing lighting, the viewpoint is the origin of the eye-coordinate system. When discussing projection, the viewpoint is the origin of the clip-coordinate system. With a typical projection matrix, the eye-coordinate and clip-coordinate origins are at the same location.

view volume

The volume in clip coordinates whose coordinates satisfy the three conditions

• w ≤ x ≤ w
• w ≤ y ≤ w
• w ≤ z ≤ w