4. From the station point, draw a
line parallel to the side of the
cottage until it strikes the
picture plane. From this point
drop a line down to the horizon
line to establish the right-hand
vanishing point.
6. Drop a line from the corner ab
down to the ground line. As
the line ab touches the picture
plane it is a true length in
perspective.
7. Connect ab to the two
vanishing points to establish
the front receding walls of the
cottage.
8. Draw a line of sight from the
spectator to cd in plan.
Where this line of sight cuts
the picture plane drop a
vertical line which will
indicate the depth of the
receding wall in perspective.
10. Draw in the front receding
walls of the cottage.
11. A height line may be use to find
the height of the apex (gh) of
the cottage. Extent the line gh
in plan until it reaches the
picture plane. From here drop a
line perpindicular to the picture
plane. From the ground line
step up the height h.
12. Draw a line from the right-
hand vanishing point to the
height h. Drop the points g
and h down perpindicular to
the picture plane to meet the
line.