HP 5961-0509 manual Example Creating a Mirror-Image, Enter HP-GL/2 mode, Arrow figure

The following example uses a subroutine to draw the same picture (an arrow) four times. Because the program changes the relative locations of P1 and P2, the direction of the arrow is different in each of the four drawings. The

program sets P1 and P2, draws the plot, then returns to reset P1 and P2 (using the IP command). This continues until all four possible mirror-images are plotted. (The original drawing is shown in each picture so you can compare the orientation of the mirror-image.)

Table 19-4 Example: Creating a Mirror-Image

ECE	Reset the printer.
EC%0B	Enter HP-GL/2 mode.
IN;	Initialize HP-GL/2 mode.
SP1;	Select pen number 1. You must use
	the SP command to enable printing.
IP1500,3600,3000,5100;	Specify the P1/P2 locations for the first
	arrow figure.
SC-15,15,-10,10;	Set up user scaling: (-15,-10) to
	(15,10).
(Run subroutine)	Run the subroutine (below) that prints
	the arrow image.
IP3000,3600,1500,5100;	Change the physical locations of P1
	and P2 to flip the image to the left.
(Run subroutine)	Print the second image.
IP1500,5100,3000,3600;	Change the physical locations of P1
	and P2 to flip the image down.
(Run subroutine)	Print the third image.
IP3000,5100,1500,3600;	Change P1/P2 locations to flip the
	image to the left and down.
(Run subroutine)	Print the fourth image.
EC%0A	Enter the PCL mode.
ECE	Send a reset to end the job and eject
	the page.

EN Using Scaling Effectively 19-13