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

22-10 The Line and Fill Attributes Group EN
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
4 cross-hatch spacing of lines angle of lines
10 shading shading level ignored
11 HP-GL/2
user-defined
raster-fill index ignored
21 PCL cross-hatch
patterns
pattern type ignored
22 PCL user-defined pattern ID ignored
Table 22-5 (continued)