PGPLOT Module: PGSHS -- set hatching style


SUBROUTINE PGSHS (ANGLE, SEPN, PHASE)
REAL ANGLE, SEPN, PHASE

Set the style to be used for hatching (fill area with fill-style 3).
The default style is ANGLE=45.0, SEPN=1.0, PHASE=0.0.


Arguments
ANGLE (input) : the angle the hatch lines make with the
horizontal, in degrees, increasing
counterclockwise (this is an angle on the
view surface, not in world-coordinate space).
SEPN (input) : the spacing of the hatch lines. The unit spacing
is 1 percent of the smaller of the height or
width of the view surface. This should not be
zero.
PHASE (input) : a real number between 0 and 1; the hatch lines
are displaced by this fraction of SEPN from a
fixed reference. Adjacent regions hatched with the
same PHASE have contiguous hatch lines. To hatch
a region with alternating lines of two colors,
fill the area twice, with PHASE=0.0 for one color
and PHASE=0.5 for the other color.