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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <gset.h>
include <pkg/rg.h>
# RG_GXMARK -- Mark x ranges.
procedure rg_gxmarkd (gp, rstr, x, npts, pltype)
pointer gp # GIO pointer
char rstr[ARB] # Range string
double x[npts] # Ordinates of graph
int npts # Number of data points
int pltype # Plot line type
pointer rg
int i, pltype1
real xl, xr, yb, yt, dy
real x1, x2, y1, y2, y3
int gstati(), stridxs()
pointer rg_xrangesd()
begin
if (stridxs ("*", rstr) > 0)
return
rg = rg_xrangesd (rstr, x, npts)
pltype1 = gstati (gp, G_PLTYPE)
call gseti (gp, G_PLTYPE, pltype)
call ggwind (gp, xl, xr, yb, yt)
dy = yt - yb
y1 = yb + dy / 100
y2 = y1 + dy / 20
y3 = (y1 + y2) / 2
do i = 1, RG_NRGS(rg) {
x1 = x[RG_X1(rg, i)]
x2 = x[RG_X2(rg, i)]
if ((x1 > xl) && (x1 < xr))
call gline (gp, x1, y1, x1, y2)
if ((x2 > xl) && (x2 < xr))
call gline (gp, x2, y1, x2, y2)
call gline (gp, x1, y3, x2, y3)
}
call gseti (gp, G_PLTYPE, pltype1)
call rg_free (rg)
end
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