PERSPECTIVE ELEMENTS
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/-/~ The cone of vision describes the sightlines radiating
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outward from SP and forming an angle with CAVin linear
perspective. The cone of visionserves as a guide in
determining what is to be included within the boundaries
of a perspective drawing.
A 60° cone of vision is assumed to be the normal fieldof
)
vision within which the principal aspects of the subject
should be placed.
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To m
inimize distortion of circles and circular shapes, they
should fall within a30° cone of vision.
~---__, A 90° cone of vision is acceptable for peripheral
elements.
• Remember that the cone of vision is three-dimensional
even though it is seenas a triangular shapein
orthographic plans andelevations. Only a small portionof
the immediate foreground falls w hin the cone of vision.
it
As the cone of vision reaches out to gather in what the
observer sees, it w
idens its field, and t he middleground
and background become more expansive.
)
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PL;AN
PERSPECTIVE DRAWINGS I 91