CHORD ANGLE EFFECTS ON CIRCLE SMOOTHNESS When plotting circles you have two parameters that you can set. The first is the radius of the circle, the second is the chord angle. The chord angle default if 5 degrees, and the smaller the number the smoother the curve. This example shows the differences in appearance between chord angles on circles. For more information see the PCL 5 Printer Language Technical Reference Manual. LEGEND: Ec = [Ctrl] [P] [Esc] in DOS EDIT EcE Resets the printer. Ec%0B Enters HP-GL/2 mode. IN; Initializes HP-GL/2 mode. SP1; Selects pen number 1 (black). Even though there is no physical pen, the SP command must be used to enable printing. SC-3000,3000,-2000,2000,1; Specifies a scaling mode, making P1 equal to (- 3000,-2000) user units and P2 equal to (3000,2000) user units. With isotropic scaling specified. PA-1700,2000;CI750,45; Specifies absolute plotting and moves to (- 1700,2000), the center of the circle, to be drawn. Draws a circle with a radius of 750 user-units and a chord angle of 45 degrees. PA300,2000;CI750,30; Specifies absolute plotting and moves to (300,2000) to draw another circle. This circle is drawn with a radius of 750 user-units, and a chord angle of 30 degrees. PA-1700,-200;CI750,15; Specifies absolute plotting and moves to (- 1700,-200) the center point of a third circle. This circle is drawn with a radius of 750 user- units, and a chord angle of 15 degrees. PA300,-200;ci750; Specifies absolute plotting and moves to (300,-200), the center of the fourth circle. Draws this circle with a radius of 750 user-units and the default chord angle of 5 degrees. Ec%0A Enters PCL mode. EcE Sends a reset to end the job and eject the page. Copyright Hewlett-Packard Co. 1993 The information contained herein is subject to change without notice. Hewlett-Packard shall not be liable for incidental or consequential damages in connection with the use of this material.
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