1 ## Copyright (C) 2007-2012 David Bateman
3 ## This file is part of Octave.
5 ## Octave is free software; you can redistribute it and/or modify it
6 ## under the terms of the GNU General Public License as published by
7 ## the Free Software Foundation; either version 3 of the License, or (at
8 ## your option) any later version.
10 ## Octave is distributed in the hope that it will be useful, but
11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 ## General Public License for more details.
15 ## You should have received a copy of the GNU General Public License
16 ## along with Octave; see the file COPYING. If not, see
17 ## <http://www.gnu.org/licenses/>.
20 ## @deftypefn {Function File} {} triplot (@var{tri}, @var{x}, @var{y})
21 ## @deftypefnx {Function File} {} triplot (@var{tri}, @var{x}, @var{y}, @var{linespec})
22 ## @deftypefnx {Function File} {@var{h} =} triplot (@dots{})
23 ## Plot a triangular mesh in 2D@. The variable @var{tri} is the triangular
24 ## meshing of the points @code{(@var{x}, @var{y})} which is returned from
25 ## @code{delaunay}. If given, @var{linespec} determines the properties
26 ## to use for the lines.
28 ## The optional return value @var{h} is a graphics handle to the created plot.
29 ## @seealso{plot, trimesh, trisurf, delaunay}
32 function h = triplot (tri, x, y, varargin)
38 idx = tri(:, [1, 2, 3, 1]).';
40 handle = plot ([x(idx); NaN(1, nt)](:),
41 [y(idx); NaN(1, nt)](:), varargin{:});
52 %! old_state = rand ("state");
53 %! restore_state = onCleanup (@() rand ("state", old_state));
58 %! tri = delaunay (x, y);
59 %! triplot (tri, x, y);