HP 5961-0509 manual Example Using ER to Draw Rectangles, 21-24The Polygon Group

Figure 21-15Edge Relative Rectangle Command

The only difference between the ER command and the RR (Fill Relative Rectangle) command is that the ER command produces an outlined rectangle, and RR, a filled one.

The ER command clears the polygon buffer and then uses it to define the rectangle before drawing. Refer to “Drawing Polygons” earlier in this chapter for more information.

The following example uses relative coordinates to draw the same image shown in the EA command example. Compare this example with the EA example to understand the differences between the coordinates used.

Table 21-12 Example: Using ER to Draw Rectangles

?E	Reset the printer.
?%0B	Enter HP-GL/2 mode.
IN;	Initialize HP-GL/2 mode.
SP1;	Select pen number 1. The SP command
	must be used to enable printing.
SC0,150,0,150,1;	Specify user scaling, with P1 being (0,0)
	and P2 (150,150); the “1” indicates
	isotropic scaling.

21-24The Polygon Group EN