Specifications

Revision C 16/01/96

Chapter 8 "HP-GL2" 22

RT - Relative Arc Three Point

RT X

, Y

, X

, Y

[,qd] [;]

; x-coordinate of intermediate point

; y-coordinate of intermediate point

; x-coordinate of end point

; y-coordinate of end point

qd ; the chord angle used to draw the arc

• The specified coordinates of the two points are relative to the current pen position.

• 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 '--Relative 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;PR;PD1500,0;"

70 LPRINT "PU-1850,1050;PD350,0;"

80 LPRINT "PU-350,-700;PD350;0;"

90 LPRINT "PU0,-350;PD0,1500,1500,0;"

100 LPRINT "RT800,-750,0,-1500;"

110 LPRINT "PU700,850;PD;"

120 LPRINT "RT100,-100,0,-200;"

130 LPRINT "PU100,100;PD200,0;"

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

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

160 END