21-6 The Polygon Group
EN
Drawing Wedges
A wedge is a section of a circle. Wedges are commonly used to draw
pie charts. You can draw a wedge by outlining (edging) the defined
area using the Edge Wedge (EW) command, or you can create filled
wedges using the Fill Wedge (WG) command.
The wedge commands use your current pen location as the center
point; you specify the radius, the start angle, and the sweep angle.
The
radius
determines the length of the two sides of the wedge.
The sign (positive or negative) of the radius determines the location
of a ‘zero-degree’ reference point. The
start angle
is the number of
degrees from the zero reference point at which you want to draw the
first radius. The
sweep angle
is the number of degrees through which
you want to draw the arc. To draw or fill a circle, simply specify a
360-degree sweep angle. Figure 21-4 shows the different parameters
of a wedge with a positive radius.
Note A
positive angle
of rotation is in the direction of the +X-axis to the
+Y-axis as shown below. A
negative angle
of rotation is in the
direction of the +X-axis to the –Y-axis.
Figure 21-3
Note The relationship of the +X-axis to +Y-axis (and –Y-axis) can change
as a result of the scaling point or scaling factor changes, thus,
changing the direction of a positive (or negative) angle of rotation.
