PGPLOT Module: PGQHS -- inquire hatching style


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

Query the style to be used hatching (fill area with fill-style 3).


Arguments
ANGLE (output) : 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 (output) : the spacing of the hatch lines. The unit spacing
is 1 percent of the smaller of the height or
width of the view surface.
PHASE (output) : 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.