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Add isocolor, isonormals and isosurface functions (For Martin Helm). Add 3D filled triangular patches and the trisurf function
author David Bateman <dbateman@free.fr>
date Sat, 11 Apr 2009 16:26:01 +0200
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children 3b810beddfa6
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1 ## Copyright (C) 2009 Martin Helm
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2 ##
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3 ## This program is free software; you can redistribute it and/or modify
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4 ## it under the terms of the GNU General Public License as published by
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5 ## the Free Software Foundation; either version 3 of the License, or
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6 ## (at your option) any later version.
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7 ##
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8 ## This program is distributed in the hope that it will be useful,
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9 ## but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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11 ## GNU General Public License for more details.
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12 ##
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13 ## You should have received a copy of the GNU General Public License
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14 ## along with this program; if not, see http://www.gnu.org/licenses/gpl.html.
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15 ##
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16 ## Author: Martin Helm <martin@mhelm.de>
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17
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18 ## usage: NORMALS = isonormals(X,Y,Z,V,VERT)
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19 ## usage: NORMALS = isonormals(V,VERT)
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20 ## usage: NORMALS = isonormals(V,P)
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21 ## usage: NORMALS = isonormals(X,Y,Z,V,P)
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22 ## usage: NORMALS = isonormals(...,'negate')
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23 ## usage: isonormals(V,P)
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24 ## usage: isonormals(X,Y,Z,V,P)
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25 ##
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26
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27 function varargout = isonormals(varargin)
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28 na = nargin;
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29 negate = false;
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30 if (ischar (varargin{nargin}))
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31 na = nargin-1;
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32 if (strcmp (lower (varargin{nargin}), "negate"))
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33 negate = true;
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34 else
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35 error ("Unknown option '%s'", varargin{nargin});
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36 endif
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37 endif
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38 switch na
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39 case 2
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40 c = varargin{1};
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41 vp = varargin{2};
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42 x = 1:size (c, 2);
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43 y = 1:size (c, 1);
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44 z = 1:size (c, 3);
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45 case 5
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46 x = varargin{1};
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47 y = varargin{2};
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48 z = varargin{3};
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49 c = varargin{4};
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50 vp = varargin{5};
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51 otherwise
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52 print_usage ();
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53 endswitch
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54 if (ismatrix (vp) && size (vp,2) == 3)
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55 pa = [];
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56 v = vp;
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57 elseif (ishandle (vp))
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58 pa = vp;
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59 v = get (pa, "Vertices");
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60 else
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61 error ("Last argument is no vertex list and no patch handle");
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62 endif
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63 if (negate)
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64 normals = -__interp_cube__ (x, y, z, c, v, "normals");
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65 else
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66 normals = __interp_cube__ (x, y, z, c, v, "normals");
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67 endif
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68 switch nargout
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69 case 0
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70 if (!isempty (pa))
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71 set (pa, "VertexNormals", normals);
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72 endif
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73 case 1
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74 varargout = {normals};
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75 otherwise
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76 print_usage ();
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77 endswitch
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78 endfunction