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comet.m: Speed up animation by using low-level graphic commands. * scripts/plot/comet.m: Speed up animation by using low-level graphic commands.
author Rik <rik@octave.org>
date Mon, 05 Aug 2013 15:44:02 -0700
parents 26589abbc78d
children 0fa126e9944e
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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} {} trisurf (@var{tri}, @var{x}, @var{y}, @var{z}, @var{c})
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21 ## @deftypefnx {Function File} {} trisurf (@var{tri}, @var{x}, @var{y}, @var{z})
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22 ## @deftypefnx {Function File} {} trisurf (@dots{}, @var{prop}, @var{val}, @dots{})
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23 ## @deftypefnx {Function File} {@var{h} =} trisurf (@dots{})
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24 ## Plot a 3-D triangular surface.
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25 ##
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26 ## In contrast to @code{surf}, which plots a surface mesh using rectangles,
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27 ## @code{trisurf} plots the mesh using triangles.
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28 ##
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29 ## @var{tri} is typically the output of a Delaunay triangulation over the
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30 ## grid of @var{x}, @var{y}. Every row of @var{tri} represents one triangle
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31 ## and contains three indices into [@var{x}, @var{y}] which are the
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32 ## vertices of the triangles in the x-y plane. @var{z} determines the
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33 ## height above the plane of each vertex.
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34 ##
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35 ## The color of the trimesh is computed by linearly scaling the @var{z} values
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36 ## to fit the range of the current colormap. Use @code{caxis} and/or
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37 ## change the colormap to control the appearance.
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38 ##
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39 ## Optionally, the color of the mesh can be specified independently of @var{z}
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40 ## by supplying a color matrix, @var{c}.
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41 ##
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42 ## Any property/value pairs are passed directly to the underlying patch object.
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43 ##
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44 ## The optional return value @var{h} is a graphics handle to the created patch
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45 ## object.
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46 ## @seealso{surf, triplot, trimesh, delaunay, patch, shading}
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47 ## @end deftypefn
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48
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49 function h = trisurf (tri, x, y, z, varargin)
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50
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51 if (nargin < 3)
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52 print_usage ();
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53 endif
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54
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55 if (nargin == 3)
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56 triplot (tri, x, y);
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57 elseif (ischar (z))
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58 triplot (tri, x, y, z, varargin{:});
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59 else
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60 if (nargin > 4 && isnumeric (varargin{1}))
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61 c = varargin{1};
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62 varargin(1) = [];
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63 else
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64 c = z;
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65 endif
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66 if (! any (strcmpi (varargin, "FaceColor")))
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67 nfc = numel (varargin) + 1;
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68 varargin(nfc+(0:1)) = {"FaceColor", "flat"};
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69 else
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70 nfc = find (any (strcmpi (varargin, "FaceColor")), 1);
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71 endif
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72 if (! any (strcmpi (varargin, "EdgeColor"))
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73 && strcmpi (varargin{nfc+1}, "interp"))
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74 varargin(end+(1:2)) = {"EdgeColor", "none"};
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75 endif
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76 hax = newplot ();
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77 htmp = patch ("Faces", tri, "Vertices", [x(:), y(:), z(:)],
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78 "FaceVertexCData", reshape (c, numel (c), 1),
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79 varargin{:});
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80 if (nargout > 0)
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81 h = htmp;
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82 endif
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83
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84 if (! ishold ())
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85 set (hax, "view", [-37.5, 30],
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86 "xgrid", "on", "ygrid", "on", "zgrid", "on");
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87 endif
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88 endif
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89
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90 endfunction
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91
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92
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93 %!demo
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94 %! clf;
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95 %! colormap ('default');
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96 %! N = 31;
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97 %! [x, y] = meshgrid (1:N);
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98 %! tri = delaunay (x(:), y(:));
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99 %! z = peaks (N);
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100 %! h = trisurf (tri, x, y, z, 'facecolor', 'interp');
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101 %! axis tight;
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102 %! zlim auto;
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103 %! title (sprintf ('facecolor = %s', get (h, 'facecolor')));
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104
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105 %!demo
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106 %! clf;
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107 %! colormap ('default');
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108 %! N = 31;
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109 %! [x, y] = meshgrid (1:N);
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110 %! tri = delaunay (x(:), y(:));
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111 %! z = peaks (N);
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112 %! h = trisurf (tri, x, y, z, 'facecolor', 'flat');
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113 %! axis tight;
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114 %! zlim auto;
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115 %! title (sprintf ('facecolor = %s', get (h, 'facecolor')));
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116
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22ae6b3411a7 Add isocolor, isonormals and isosurface functions (For Martin Helm). Add 3D filled triangular patches and the trisurf function
David Bateman <dbateman@free.fr>
parents:
diff changeset
117 %!demo
14237
11949c9795a0 Revamp %!demos in m-files to use Octave coding conventions on spacing, etc.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
118 %! clf;
14247
c4fa5e0b6193 test: Make surface demos reproducible by setting colormap to default at start of demo.
Rik <octave@nomad.inbox5.com>
parents: 14245
diff changeset
119 %! colormap ('default');
14245
4506eade9f04 Use Matlab coding conventions for demos in plot/ directory.
Rik <octave@nomad.inbox5.com>
parents: 14237
diff changeset
120 %! old_state = rand ('state');
4506eade9f04 Use Matlab coding conventions for demos in plot/ directory.
Rik <octave@nomad.inbox5.com>
parents: 14237
diff changeset
121 %! restore_state = onCleanup (@() rand ('state', old_state));
4506eade9f04 Use Matlab coding conventions for demos in plot/ directory.
Rik <octave@nomad.inbox5.com>
parents: 14237
diff changeset
122 %! rand ('state', 10);
9110
22ae6b3411a7 Add isocolor, isonormals and isosurface functions (For Martin Helm). Add 3D filled triangular patches and the trisurf function
David Bateman <dbateman@free.fr>
parents:
diff changeset
123 %! N = 10;
22ae6b3411a7 Add isocolor, isonormals and isosurface functions (For Martin Helm). Add 3D filled triangular patches and the trisurf function
David Bateman <dbateman@free.fr>
parents:
diff changeset
124 %! x = 3 - 6 * rand (N, N);
22ae6b3411a7 Add isocolor, isonormals and isosurface functions (For Martin Helm). Add 3D filled triangular patches and the trisurf function
David Bateman <dbateman@free.fr>
parents:
diff changeset
125 %! y = 3 - 6 * rand (N, N);
22ae6b3411a7 Add isocolor, isonormals and isosurface functions (For Martin Helm). Add 3D filled triangular patches and the trisurf function
David Bateman <dbateman@free.fr>
parents:
diff changeset
126 %! z = peaks (x, y);
22ae6b3411a7 Add isocolor, isonormals and isosurface functions (For Martin Helm). Add 3D filled triangular patches and the trisurf function
David Bateman <dbateman@free.fr>
parents:
diff changeset
127 %! tri = delaunay (x(:), y(:));
22ae6b3411a7 Add isocolor, isonormals and isosurface functions (For Martin Helm). Add 3D filled triangular patches and the trisurf function
David Bateman <dbateman@free.fr>
parents:
diff changeset
128 %! trisurf (tri, x(:), y(:), z(:));
12524
482cf3aad915 trisurf.m: Set default edgecolor as Matlab does. Add demos.
Ben Abbott <bpabbott@mac.com>
parents: 12187
diff changeset
129
482cf3aad915 trisurf.m: Set default edgecolor as Matlab does. Add demos.
Ben Abbott <bpabbott@mac.com>
parents: 12187
diff changeset
130 %!demo
14237
11949c9795a0 Revamp %!demos in m-files to use Octave coding conventions on spacing, etc.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
131 %! clf;
14247
c4fa5e0b6193 test: Make surface demos reproducible by setting colormap to default at start of demo.
Rik <octave@nomad.inbox5.com>
parents: 14245
diff changeset
132 %! colormap ('default');
12524
482cf3aad915 trisurf.m: Set default edgecolor as Matlab does. Add demos.
Ben Abbott <bpabbott@mac.com>
parents: 12187
diff changeset
133 %! x = rand (100, 1);
482cf3aad915 trisurf.m: Set default edgecolor as Matlab does. Add demos.
Ben Abbott <bpabbott@mac.com>
parents: 12187
diff changeset
134 %! y = rand (100, 1);
13141
e81ddf9cacd5 maint: untabify and remove trailing whitespace from source files
John W. Eaton <jwe@octave.org>
parents: 12792
diff changeset
135 %! z = x.^2 + y.^2;
e81ddf9cacd5 maint: untabify and remove trailing whitespace from source files
John W. Eaton <jwe@octave.org>
parents: 12792
diff changeset
136 %! tri = delaunay (x, y);
14001
5f0bb45e615c doc: Update documentation for functions returning a graphics handle h (Bug #34761)
Rik <octave@nomad.inbox5.com>
parents: 13747
diff changeset
137 %! trisurf (tri, x, y, z);
12524
482cf3aad915 trisurf.m: Set default edgecolor as Matlab does. Add demos.
Ben Abbott <bpabbott@mac.com>
parents: 12187
diff changeset
138
482cf3aad915 trisurf.m: Set default edgecolor as Matlab does. Add demos.
Ben Abbott <bpabbott@mac.com>
parents: 12187
diff changeset
139 %!demo
14237
11949c9795a0 Revamp %!demos in m-files to use Octave coding conventions on spacing, etc.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
140 %! clf;
14247
c4fa5e0b6193 test: Make surface demos reproducible by setting colormap to default at start of demo.
Rik <octave@nomad.inbox5.com>
parents: 14245
diff changeset
141 %! colormap ('default');
12524
482cf3aad915 trisurf.m: Set default edgecolor as Matlab does. Add demos.
Ben Abbott <bpabbott@mac.com>
parents: 12187
diff changeset
142 %! x = rand (100, 1);
482cf3aad915 trisurf.m: Set default edgecolor as Matlab does. Add demos.
Ben Abbott <bpabbott@mac.com>
parents: 12187
diff changeset
143 %! y = rand (100, 1);
13141
e81ddf9cacd5 maint: untabify and remove trailing whitespace from source files
John W. Eaton <jwe@octave.org>
parents: 12792
diff changeset
144 %! z = x.^2 + y.^2;
e81ddf9cacd5 maint: untabify and remove trailing whitespace from source files
John W. Eaton <jwe@octave.org>
parents: 12792
diff changeset
145 %! tri = delaunay (x, y);
14245
4506eade9f04 Use Matlab coding conventions for demos in plot/ directory.
Rik <octave@nomad.inbox5.com>
parents: 14237
diff changeset
146 %! trisurf (tri, x, y, z, 'facecolor', 'interp');
12524
482cf3aad915 trisurf.m: Set default edgecolor as Matlab does. Add demos.
Ben Abbott <bpabbott@mac.com>
parents: 12187
diff changeset
147
482cf3aad915 trisurf.m: Set default edgecolor as Matlab does. Add demos.
Ben Abbott <bpabbott@mac.com>
parents: 12187
diff changeset
148 %!demo
14237
11949c9795a0 Revamp %!demos in m-files to use Octave coding conventions on spacing, etc.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
149 %! clf;
14247
c4fa5e0b6193 test: Make surface demos reproducible by setting colormap to default at start of demo.
Rik <octave@nomad.inbox5.com>
parents: 14245
diff changeset
150 %! colormap ('default');
12524
482cf3aad915 trisurf.m: Set default edgecolor as Matlab does. Add demos.
Ben Abbott <bpabbott@mac.com>
parents: 12187
diff changeset
151 %! x = rand (100, 1);
482cf3aad915 trisurf.m: Set default edgecolor as Matlab does. Add demos.
Ben Abbott <bpabbott@mac.com>
parents: 12187
diff changeset
152 %! y = rand (100, 1);
13141
e81ddf9cacd5 maint: untabify and remove trailing whitespace from source files
John W. Eaton <jwe@octave.org>
parents: 12792
diff changeset
153 %! z = x.^2 + y.^2;
e81ddf9cacd5 maint: untabify and remove trailing whitespace from source files
John W. Eaton <jwe@octave.org>
parents: 12792
diff changeset
154 %! tri = delaunay (x, y);
14245
4506eade9f04 Use Matlab coding conventions for demos in plot/ directory.
Rik <octave@nomad.inbox5.com>
parents: 14237
diff changeset
155 %! trisurf (tri, x, y, z, 'facecolor', 'interp', 'edgecolor', 'k');
12524
482cf3aad915 trisurf.m: Set default edgecolor as Matlab does. Add demos.
Ben Abbott <bpabbott@mac.com>
parents: 12187
diff changeset
156