To
observe the use
of
these procedures, we recommend
that
you run
the
follow-
ing program: $INCLUDE GRAPHICS
VAR
V1,
H1
, RADIUS = INTEGER
VAR
V2, H2, HEIGHT, WIDTH = INTEGER
VAR
V3
, H3, LENGTH = INTEGER
VAR
V4,H4,H,
W,
V.PERSP, H.PERSP, INT, DEPTH = INTEGER
V1
=
15
H1
=
15
RADIUS = 10
CIRCLE
V1,
H1, RADIUS
V2
= 30
H2 =
10
HEIGHT =
20
WIDTH =
40
RECTANGLE
V2,
H2, HEIGHT, WIDTH
V3
=
60
H3 =
20
LENGTH =
30
SQUARE
V3
, H3, LENGTH
V4
= 80
H4 = 80
H =
50
W = 15
DEPTH = 8
V.PERSPECTIVE = - 1
H.PERSPECTIVE = 1
INTERIOR = 0
BAR
V4,
H4,
H,
W,
DEPTH, INT, V.PERSP, H.PERSP
V4
=
20
H4 = 130
H = 50
W = 10
DEPTH =
15
V.PERSPECTIVE = 1
H.PERSPECTIVE = 1
INTERIOR = 1
BAR
V4,
H4,
H,
W,
DEPTH, INT, V.PERS, H.PERSP
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