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Don't pass axis handle unnecessarily from high level to low level plot functions. * scripts/plot/comet.m, scripts/plot/comet3.m, scripts/plot/compass.m, scripts/plot/contour.m, scripts/plot/contourf.m, scripts/plot/cylinder.m, scripts/plot/ellipsoid.m, scripts/plot/errorbar.m, scripts/plot/feather.m, scripts/plot/mesh.m, scripts/plot/meshc.m, scripts/plot/meshz.m, scripts/plot/pcolor.m, scripts/plot/plot3.m, scripts/plot/rectangle.m, scripts/plot/rose.m, scripts/plot/scatter3.m, scripts/plot/semilogxerr.m, scripts/plot/semilogy.m, scripts/plot/semilogyerr.m, scripts/plot/slice.m, scripts/plot/sphere.m, scripts/plot/stairs.m, scripts/plot/surf.m, scripts/plot/surfc.m, scripts/plot/surfnorm.m, scripts/plot/trimesh.m, scripts/plot/trisurf.m: Don't pass hax to lower level functions after newplot() has been called.
author Rik <rik@octave.org>
date Wed, 31 Jul 2013 18:42:17 -0700
parents eaab03308c0b
children 000be929e835
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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72c96de7a403 maint: update copyright notices for 2012
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1 ## Copyright (C) 2007-2012 David Bateman
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2 ##
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3 ## This file is part of Octave.
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4 ##
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5 ## Octave is free software; you can redistribute it and/or modify it
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6 ## under the terms of the GNU General Public License as published by
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7 ## the Free Software Foundation; either version 3 of the License, or (at
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8 ## your option) any later version.
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9 ##
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10 ## Octave is distributed in the hope that it will be useful, but
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 ## General Public License for more details.
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14 ##
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15 ## You should have received a copy of the GNU General Public License
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16 ## along with Octave; see the file COPYING. If not, see
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17 ## <http://www.gnu.org/licenses/>.
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18
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19 ## -*- texinfo -*-
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20 ## @deftypefn {Function File} {} trimesh (@var{tri}, @var{x}, @var{y}, @var{z}, @var{c})
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21 ## @deftypefnx {Function File} {} trimesh (@var{tri}, @var{x}, @var{y}, @var{z})
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22 ## @deftypefnx {Function File} {} trimesh (@var{tri}, @var{x}, @var{y})
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23 ## @deftypefnx {Function File} {} trimesh (@dots{}, @var{prop}, @var{val}, @dots{})
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24 ## @deftypefnx {Function File} {@var{h} =} trimesh (@dots{})
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25 ## Plot a 3-D triangular wireframe mesh.
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26 ##
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27 ## In contrast to @code{mesh}, which plots a mesh using rectangles,
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28 ## @code{trimesh} plots the mesh using triangles.
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29 ##
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30 ## @var{tri} is typically the output of a Delaunay triangulation over the
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31 ## grid of @var{x}, @var{y}. Every row of @var{tri} represents one triangle
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32 ## and contains three indices into [@var{x}, @var{y}] which are the
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33 ## vertices of the triangles in the x-y plane. @var{z} determines the
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34 ## height above the plane of each vertex. If no @var{z} input is given then
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35 ## the triangles are plotted as a 2-D figure.
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36 ##
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37 ## The color of the trimesh is computed by linearly scaling the @var{z} values
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38 ## to fit the range of the current colormap. Use @code{caxis} and/or
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39 ## change the colormap to control the appearance.
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40 ##
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41 ## Optionally, the color of the mesh can be specified independently of @var{z}
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42 ## by supplying a color matrix, @var{c}.
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43 ##
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44 ## Any property/value pairs are passed directly to the underlying patch object.
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45 ##
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46 ## The optional return value @var{h} is a graphics handle to the created patch
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47 ## object.
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48 ## @seealso{mesh, tetramesh, triplot, trisurf, delaunay, patch, hidden}
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49 ## @end deftypefn
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50
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51 function h = trimesh (tri, x, y, z, varargin)
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52
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53 if (nargin < 3)
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54 print_usage ();
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55 endif
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56
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57 if (nargin == 3)
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58 triplot (tri, x, y);
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59 elseif (ischar (z))
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60 triplot (tri, x, y, z, varargin{:});
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61 else
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62 hax = newplot ();
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63 handle = patch ("Vertices", [x(:), y(:), z(:)], "Faces", tri,
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64 "FaceColor", "none", "EdgeColor", __next_line_color__ (),
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65 varargin{:});
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66 if (! ishold ())
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67 set (hax, "view", [-37.5, 30],
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68 "xgrid", "on", "ygrid", "on", "zgrid", "on");
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69 endif
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70 if (nargout > 0)
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71 h = handle;
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72 endif
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73 endif
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74
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75 endfunction
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76
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77
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78 %!demo
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79 %! clf;
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80 %! old_state = rand ('state');
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81 %! restore_state = onCleanup (@() rand ('state', old_state));
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82 %! rand ('state', 10);
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83 %! N = 10;
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84 %! x = 3 - 6 * rand (N, N);
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85 %! y = 3 - 6 * rand (N, N);
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86 %! z = peaks (x, y);
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87 %! tri = delaunay (x(:), y(:));
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88 %! trimesh (tri, x(:), y(:), z(:));
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89