HP 5961-0509 manual HP-GL/2, Referenced from the positive plotter-unit X-axis, as shown

	Table 22-5	(continued)
	4	cross-hatch	spacing of lines	angle of lines
	10	shading	shading level	ignored
	11	HP-GL/2	raster-fill index	ignored
		user-defined
	21	PCL cross-hatch	pattern type	ignored
		patterns
	22	PCL user-defined	pattern ID	ignored
	For fill types 3 and 4, the option1 parameter specifies the distance
	between the lines in the fill. This distance is specified in current units
	measured along the X-axis. Option1 must be a positive number (if
	zero, then 1% of the diagonal distance from P1 to P2 is used).
	The default spacing is 1% of the diagonal distance from P1 to P2.
	Subsequent changes in the P1/P2 locations affect this distance only
	if the spacing is defined in user-units (an SC command is in effect).
	For fill types 3 and 4, the option2 parameter specifies an angle,
	in degrees, for the lines of the fill. This angle is a positive angle
	referenced from the positive plotter-unit X-axis, as shown in the
	following illustration (0 and 180 are horizontal; 90 and 270 are
	vertical). The first set of lines for cross-hatched fill are drawn at
	the specified angle and the next set are drawn at that angle plus
	90 degrees.
Note	A positive angle is an angle rotated from the +X-axis to the +Y-axis
	as shown below. A negative angle of rotation is in the direction of
	the +X-axis to the –Y-axis.

Figure 22-6 Positive Angle of Rotation

22-10The Line and Fill Attributes Group EN