Specifications

Revision C 16/01/96

Chapter 8 "HP-GL2" 21

AT - Absolute Arc Three Point

AT X

, Y

, X

, Y

] [;]

; x-coordinate of intermediate point Y

; y-coordinate of intermediate point

; x-coordinate of end point y

; y-coordinate of end point

qd ; the chord angle used to draw the arc

• All coordinates are absolute and in current units.

• The command draws an arc from the current position, through the specified intermediate position and

finishing at the specified end position.

• After completion of the command the current cursor position is at the end of the arc.

• An arc can be drawn clockwise or anti-clockwise.

• If the current scaling mode is not isotropic, the arc may be elliptical rather than circular.

• The chord angle must be in the range 0.5° to 180°.

• The default chord angle is 5°.

10 '--Absolute Arc Three Point--

20 WIDTH "LPT1:",255

30 LPRINT CHR$(27);"E";

40 LPRINT CHR$(27);"%0B";

50 LPRINT "IN;SP1;";

60 LPRINT "PA1000,100;PD2500,100;"

70 LPRINT "PU650,1150;PD1000,1150;"

80 LPRINT "PU650,450;PD1000,450;"

90 LPRINT "PU1000,100;PD1000,1500,2500,1500;"

100 LPRINT "AT3200,800,2500,1500;"

110 LPRINT "PU3200,900;PD;"

120 LPRINT "AT3300,800,3200,700;"

130 LPRINT "PU3300,800;PD3500,800;"

140 LPRINT CHR$(27);"%0A";

150 LPRINT CHR&(27);"E";

160 END