7. This horizon line is a very important one. If it is high, objects in
the perspective view will appear as if they were viewed from a height. If
it is low, objects will appear as if they were viewed from directly in front
or below.
8. Generally, it is best to select a station point approximating that from
which a real observer might view the object.
9. Project the corner points of the object to the picture planes by
constructing lines that converge toward their respective station points from
each corner of the top and side views. For example, to establish line 1-5,
in the perspective view, construct vertical and horizontal intersecting
lines from the respective points on the picture planes (fig 2-3).
Figure 2-3. Locating vanishing points for two-point
perspective drawn from the plan view
10. Figure 2-4 shows the remainder of the points projected and all lines
constructed. In this type of perspective the construction of the vanishing
points is not essential. However, if you were to continue any or all of the
receding lines such as lines 1-2, 5-6, 3-4, and 7-8 you will find they
converge on the VPR. Also the VPL may be located by extending the lines 1-
3, 7-5, 4-2, and 8-6. Locating the vanishing points will serve as a check
to see if you have projected all points correctly.
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