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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <gki.h>
include "imd.h"
# IMD_POLYMARKER -- Draw a polymarker. The polymarker is defined by the array
# of points P, consisting of successive (x,y) coordinate pairs.
procedure imd_polymarker (p, npts)
short p[ARB] # points defining line
int npts # number of points, i.e., (x,y) pairs
pointer pm
int i, len_p
int x, y, oldx, oldy
include "imd.com"
begin
if (npts <= 0)
return
len_p = npts * 2
# Keep track of the number of drawing instructions since the last frame
# clear.
g_ndraw = g_ndraw + 1
# Update polymarker attributes if necessary.
pm = IMD_PMAP(g_kt)
if (IMD_TYPE(g_kt) != PM_LTYPE(pm)) {
call imd_linetype (PM_LTYPE(pm))
IMD_TYPE(g_kt) = PM_LTYPE(pm)
}
if (IMD_WIDTH(g_kt) != PM_WIDTH(pm)) {
call idk_linewidth (g_out, nint (GKI_UNPACKREAL(PM_WIDTH(pm))))
IMD_WIDTH(g_kt) = PM_WIDTH(pm)
}
if (IMD_COLOR(g_kt) != PM_COLOR(pm)) {
call imd_color (PM_COLOR(pm))
IMD_COLOR(g_kt) = PM_COLOR(pm)
}
# Draw the polymarker.
oldx = 0; oldy = 0
for (i=1; i <= len_p; i=i+2) {
x = p[i]; y = p[i+1]
if (x != oldx || y != oldy) {
call idk_move (g_out, x, y)
call idk_draw (g_out, x, y)
}
oldx = x; oldy = y
}
end
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