LOCATION OF THE VANISHING, VIEW AND DEPTH POINTS
IN PARALLEL PERSPECTIVE
First
of all, draw the three parallel and horizontal lines:
—
support
line
—
horizon
line
—
distance
line.
Work
to a scale and perform the following operations:
A) —
Draw
a perfectly geometric square on the support line with the vertical and
horizontal lines in parallel.
B) —
Locate the vanishing and view points as follows: find the middle of
the square and with a vertical line starting at the support line and
going up to the horizon line (which is the viewer’s view) you
will find where to mark the vanishing point. From the support line,
starting at the same vertical line downwards, determine the visual distance
of 17cm and locate the view point. Work always to a scale. 17cm is equal
to 8.5mm in 1:20 scale.
C) —
Now sketch a diagonal within the square, from one vertex to the other.
Then, sketch a line parallel to this diagonal; from the view point to
the distance line (we do not construct the square out of focus in order
to facilitate the process of carrying out the structure). From this
point, sketch a perpendicular line up to the horizon line and you will
find the depth point. This operation is shown in figure nº 7.
After obtaining
the vanishing, view and depth points, you will construct a flat surface
to draw in perspective.
Note in
figure nº 8 that the distance between the view point and the distance
line is always equal to the distance between the vanishing point and
the depth point. Therefore, in order to work on parallel perspective
it will not be necessary to perform the whole operation shown in figure
nº 7 to find the three points. You have only to place the depth
point at the horizon line, far from the vanishing point in the same
proportion that the view point is located at the distance line.
