Brother International HL-1070 Technical Reference - Page 168
AA - Draw absolute arc, HP-GL/2 - 20
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2001/10/02 AA - Draw absolute arc AA [ X, Y, qc [, qd ]] [;] X ; Arc centre X coordinate Y ; Arc centre Y coordinate qc ; Arc angle in degrees qd ; Chord angle in degrees • Coordinates are absolute coordinates in current units. • Starting from the current position, this command plots an arc centred on the absolute coordinates X, Y having the specified arc angle and chord angle, with the radius being the distance between the current position and the point X,Y. • After execution of the command the cursor position is at the opposite end of the arc from the point at which plotting started. • Plotting takes place only when the pen is down. • If the command is invoked with the pen up, plotting is not performed, but the cursor position moves to what would have been the plot end point. qd = Chord Angle qc = Arc Angle (X,Y) • The value for qc is a clamped real number. • When qc is positive, plotting is counterclockwise. • When qc is negative, plotting is clockwise. • The value for qd is a clamped real number in the range 0.5° to 180°. The default value is 5°. 10 '-- Draw Absolute Arc -20 WIDTH "LPT1:",255 30 LPRINT CHR$(27);"E"; 40 LPRINT CHR$(27);"%0B"; 50 LPRINT "IN;SP1;IP1000,1000,6000,6000;" 60 LPRINT "SC0,100,0,100;" 70 LPRINT "PA0,30;" 80 LPRINT "PD;PA0,45;AA0,50,180;PA0,70;" 90 LPRINT "AA0,100,900;PA100,55;AA100,50,180;PA100,30;" 100 LPRINT "AA100,100,90;PA45,100;AA50,100,180;PA80,100;" 110 LPRINT "AA100,0,90;PA55,0;AA50,0,180;PA30,0;AA0,0,90;" 120 LPRINT "PU;PA50,50,CI20;" 130 LPRINT CHR$(27); "%0A"; 140 LPRINT CHR$(27); "E"; 150 END CHAPTER 4 HP-GL/2 - 20