#  File src/library/graphics/R/segments.R
#  Part of the R package, http://www.R-project.org
#
#  Copyright (C) 1995-2012 The R Core Team
#
#  This program is free software; you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation; either version 2 of the License, or
#  (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  A copy of the GNU General Public License is available at
#  http://www.r-project.org/Licenses/

segments <-
    function(x0, y0, x1 = x0, y1 = y0, col=par("fg"), lty=par("lty"),
             lwd=par("lwd"), ...)
{
    if (missing(x1) && missing(y1))
        stop("one of 'x1' and 'y1' must be given")
    .External.graphics(C_segments, x0, y0, x1, y1, col=col, lty=lty, lwd=lwd, ...)
    invisible()
}