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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <gio.h>
# GRDRAW -- Relative draw, i.e., move the pen to the specified offset from the
# current position.
procedure grdraw (gp, x, y)
pointer gp # graphics descriptor
real x, y # offset from current position
real cx, cy
begin
if (IS_INDEF(x) || IS_INDEF(y))
call gadraw (gp, x, y)
else {
call gcurpos (gp, cx, cy)
if (IS_INDEF(cx) || IS_INDEF(cy))
call gadraw (gp, INDEF, INDEF)
else
call gadraw (gp, cx + x, cy + y)
}
end
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