ONE-POINT PERSPECTIVE
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The one-point perspective system assumes that two
of the three principal axes-one vertical and the
other horizontal-are parallel to the picture plane.
All lines parallel to t hese axes are also parallel to the
picture plane (PP). and therefore retain their true
orientation and do not appear to converge. For this
reason. one-point perspective is also known as
parallel perspective.
The third principal axis is horizontal. perpendicular to
PP and parallel with the central axis of vision (CAV).
All lines parallel to CAV converge on the horizon line
(HL) at the center of vision (C). This is the particular
vanishing point referred to in one-point perspective.
The one-point perspective system is particularly
effective in depicting the interior of a spatial volume
because the display of five bounding faces provides a
clear sense of enclosure. For this reason, designers
often use one-point perspectives to present
experiential views of street scenes, formal gardens.
courtyards. colonnades. and interior room We can
s.
also use the presence of t hecentral vanishing point
to focus the viewer's attention and emphasize axial
and symmetrical arrangements in space.
100/ ARCHITECTURAL GRAPHICS