Specifications

Revision C 16/01/96

Chapter 8 "HP-GL2" 16

RO - Rotate coordinate system

RO [

][;]

q : Angle in degrees through which the coordinate system is rotated.

• This instruction is used to rotate the graphics coordinate system anti-clockwise.

• Using this instruction with no parameter sets the rotation of the coordinate system to 0 degrees (default

value).

• The pen position does not change.

• P1 and P2 rotate with the coordinate system and retain the same coordinate values.

• To relocate P1 and P2 at the lower left and upper right hand corners of the picture frame, use the IP; or IR;

command.

• If you have previously used an IW command, the window is also rotated. Any part of the window that falls

outside the hard clip limits will be clipped.

• The command remains in effect until another RO command is used, or until the printer is initialized with

the IN instruction.

• Valid values of q are 0, 90, 180 or 270.

10 '--Rotate Coordinate System--

20 WIDTH "LPT1:",255

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

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

50 LPRINT "IN;SP1;";

60 FOR I = 0 TO 270 STEP 90

70 LPRINT "RO"; I; "PA1000,2000;PD3000,2000,2000,3000,1000,2000;PU;"

80 LPRINT "LB RO ="; I; CHR$(3)

90 LPRINT "PA600,1500;LBRotate Coordinate System";CHR$(3)

100 NEXT I

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

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

130 END