Homelite HL-1070, HL-P2500, HL-1660E, HL-2400CE RT Relative arc three point, PE Polyline encoded

10/10/03

RT - Relative arc three point

RT X1, Y1, X2, Y2 [,qd] [;] X1 ; x-coordinate of intermediate point Y2 ; y-coordinate of intermediate point X2 ; x-coordinate of end point

y2 ; 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--

20WIDTH "LPT1:",255

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

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

50LPRINT "IN;SP1;";

60LPRINT "PA1000,100;PR;PD1500,0;"

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

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

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

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

110LPRINT "PU700,850;PD;"

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

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

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

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

160END

<Sample 29>

PE - Polyline encoded

PE [ [flag] [value] XiYi ... [flag] [value] XiYi ] ]; flag ; a command or mode that applies to the data that follows

value; parameter data for the preceding flag

X; X-coordinate of a cursor movement destination

Y; Y-coordinate of a cursor movement destination

•This command allows you to combine a sequence of PA, PR, PU, PD and SP commands into a coded format. This reduces file size and transmission time.

•Do not use commas within the PE command. Parameters either have their own terminators or do not require them.

•The PE command must be terminated with a semi-colon.

•The command draws lines using the current line type and current units.

•The command draws lines to all coordinate points specified unless you precede the coordinate pair with a pen up flag.

•On completion of the command, the pen is down unless the final move was made with the pen up.

•All coordinate points are interpreted as relative unless preceded by the absolute flag (=).

• On completion of the command, the previous plotting mode is restored.

•Flags are not encoded. They are sent as ASCII characters. The MSB of the code is ignored, thus 60 and 188 can both represent <, the flag for pen up.

CHAPTER 4 HP-GL/2 - 22