(4) There are three types of perspective construction: one-point, two-point, and three-
point.
(a) One-point exists when two dimensions, an object's height and width, are
parallel to the picture plane (fig 2-10A).
Figure 2-10A. One-point perspective
(b) Two-point, or angular, is when the object is sitting at an angle to the picture
plane. There are two sets of horizontal lines or planes converging toward two separate vanishing
points on the eye level or horizon line (fig 2-10B).
Figure 2-10B. Two-point perspective
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