HP PCL/PJL reference (PCL 5 Printer Language) - Technical Reference Manual Part II

EN AT, Absolute Arc Three Point 20-17
z If the end point is the same as the current pen location, a circle
is drawn, with its diameter being the line from the current pen
position to the intermediate point.
z If the current pen position, intermediate point, and end point are
collinear, a straight line is drawn.
z If the intermediate point does not lie between the current pen
location and the end point, and the three points are collinear,
two lines are drawn; one from the current pen location and the
other from the end point, leaving a gap between them. Refer to
the following illustration. Both lines extend to the PCL Picture
Frame limits or current window.
Figure 20-11
Table 20-10 Example: Using the AT Command
E
C
E Reset the printer.
E
C
%ØB Enter HP-GL/2 mode.
IN; Initialize HP-GL/2 mode.
SP1; Select pen number 1 (black).
PA1000,100;
PD2500,100;
Specify (1000,100) as the starting
location, place the pen down, and
draw a line to (2500,100).
PU650,1150;
PD1000,1150;
Lift the pen, move to (650,1150),
place the pen down, and draw a line
to (1000,1150).