Learning Event 2:
DEFINE OBJECTS AT, ABOVE, AND BELOW EYE LEVEL
1. When the front edge of the subject does not rest against the picture
plane, it is necessary to use some other dimension. Since the end of the
block is square it is possible to find the perspective length of a
horizontal line and use this dimension for the edge of 1-5. This is done by
drawing a line parallel to the picture plane from 1, measuring a length of
this line equal to 1-3, and drawing a line converging on the station point
to the picture plane from the end of this line.
2. This length can then be transferred to the front edge of the perspective
view and the view completed as shown in Figure 2-4. To check the accuracy
of this method, compare Figure 2-4 with 2-2. You will find that, since the
station point, horizon level, and the bottom of the cube correspond, the two
perspective views are similar.
It is possible to make them correspond
exactly.
3. In Figure 2-4, the bottom of the front edge of the block has been placed
at a certain point, to correspond with the same point in Figure 2-2.
Actually it could have been placed as any desired point.
Thus, the
perspective view may be drawn below the eye level, at eye level or above it,
as shown in Figure 2-5.
Figure 2-5.
A. Object on eye level B. Object above eye
level C. Object below eye level
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