HP LaserJet 4100 HP PCL/PJL reference (PCL 5 Printer Language) - Technical Ref - Page 150
Drawing Wedges
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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. Note Figure 21-3 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. 21-6 The Polygon Group EN