TWO -POINT PERSPECTIVE
The two-point perspective system assumes t hat the
observer's central axis of vision (CAV) is horizontal and
the picture plane (PP) is vertical. The principal vertical
axis is parallel to PP, and all lines parallel to it remain
vertical and parallel in the perspective drawing. The two
principal horizontal axes, however, are oblique to PP All
lines parallel to these axes therefore appear to converge
to two vanishing points on the horizon line(HL), oneset
to the left and the ot her t othe right. T are the two
hese
points referred to intwo-point perspective.
Two-point perspective is probably the most widely used
of the three types of linear perspective. Unlike one-point
perspectives, two-point perspectives tend to be neither
symmetrical nor static. Atwo-point perspective is particularly effective in illustrat ing the three-dimensional
form of objects in space ranging in scale from achair to
the massing of abuilding.
• T pictorial effect of a two-point perspective varies
he
withthe spectator's angle of view. The orientation of
thetwo horizontal axes t oPP determines how much we
will see of the two majar sets of vertical planes and the
degree to which they are foreshortened in perspective.
• In depicting a spatial volume. such as the interior of a
room or an exterior courtyard or street. a two-point
perspective is most effective when the angle of view
approaches that of a one-point perspective.
PERS
PECTIVE DRAW
INGS
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