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1 ## Copyright (C) 2004-2008,2009 Carlo de Falco, Massimiliano Culpo |
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2 ## |
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3 ## This file is part of |
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4 ## |
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5 ## FPL - Fem PLotting package for octave |
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6 ## |
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7 ## FPL is free software; you can redistribute it and/or modify |
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8 ## it under the terms of the GNU General Public License as published by |
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9 ## the Free Software Foundation; either version 3 of the License, or |
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10 ## (at your option) any later version. |
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11 ## |
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12 ## FPL is distributed in the hope that it will be useful, |
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13 ## but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 ## GNU General Public License for more details. |
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16 ## |
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17 ## You should have received a copy of the GNU General Public License |
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18 ## along with FPL; If not, see <http://www.gnu.org/licenses/>. |
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19 ## |
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20 ## |
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21 ## AUTHORS: |
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22 ## Carlo de Falco <cdf _AT_ users.sourceforge.net> |
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23 ## |
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24 ## Culpo Massimiliano |
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25 ## Bergische Universitaet Wuppertal |
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26 ## Fachbereich C - Mathematik und Naturwissenschaften |
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27 ## Arbeitsgruppe fuer Angewandte MathematD-42119 Wuppertal Gaussstr. 20 |
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28 ## D-42119 Wuppertal, Germany |
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29 |
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30 ## -*- texinfo -*- |
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31 ## @deftypefn {Function File} {} FPL3dxoutputmesh ( @var{filename}, @ |
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32 ## @var{mesh} ) |
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33 ## |
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34 ## Outputs data in DX form. |
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35 ## |
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36 ## Variable must be a scalar, vector or tensor of doubles |
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37 ## |
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38 ## @itemize @minus |
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39 ## @item @var{filename} = name of file to save (type string) |
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40 ## @item @var{mesh} = PDE-tool like mesh |
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41 ## @end itemize |
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42 ## @end deftypefn |
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43 |
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44 |
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45 function FPL3dxoutputmesh(filename,mesh) |
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46 |
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47 nodes = mesh.p'; |
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48 elem = mesh.t(1:4,:)'; |
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49 |
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50 fid = fopen (filename,"w"); |
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51 nnodes = columns(mesh.p); |
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52 nelem = columns(mesh.t); |
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53 |
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54 fprintf(fid,"object ""pos""\nclass array type float rank 1 shape 3 items %d data follows",nnodes); |
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55 for ii = 1:nnodes |
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56 fprintf(fid,"\n"); |
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57 fprintf(fid," %e",nodes(ii,:)); |
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58 endfor |
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59 |
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60 ## In DX format nodes are numbered starting from zero, |
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61 ## instead we want to number them starting from 1. |
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62 if (min(min(elem))==1) |
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63 elem = elem - 1; |
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64 elseif(min(min(elem))~=0) |
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65 error("WARNING: check tetrahedra structure"); |
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66 end |
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67 |
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68 fprintf(fid,"\n\nobject ""con""\nclass array type int rank 1 shape 4 items %d data follows",nelem); |
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69 for ii = 1:nelem |
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70 fprintf(fid,"\n"); |
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71 fprintf(fid," %d",elem(ii,:)); |
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72 endfor |
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73 |
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74 fprintf(fid,"\nattribute ""element type"" string ""tetrahedra""\nattribute ""ref"" string ""positions""\n\n"); |
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75 |
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76 fprintf(fid,"object ""themesh"" class field\n"); |
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77 fprintf(fid,"component ""positions"" value ""pos""\n"); |
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78 fprintf(fid,"component ""connections"" value ""con""\n"); |
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79 |
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80 fprintf(fid,"\nend\n"); |
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81 fclose (fid); |
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82 |
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83 endfunction |
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84 |
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85 %!test |
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86 %! msh.p =[ 0 0 1 1 0 0 1 1 |
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87 %! 0 1 0 1 0 1 0 1 |
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88 %! 0 0 0 0 1 1 1 1]; |
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89 %! msh.e =[1 5 7 8 5 5 6 8 1 3 5 7 |
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90 %! 2 6 3 3 7 3 2 6 3 2 6 6 |
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91 %! 6 1 8 4 3 1 4 4 2 4 7 8 |
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92 %! 0 0 0 0 0 0 0 0 0 0 0 0 |
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93 %! 0 0 0 0 0 0 0 0 0 0 0 0 |
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94 %! 0 0 0 0 0 0 0 0 0 0 0 0 |
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95 %! 0 0 0 0 0 0 0 0 0 0 0 0 |
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96 %! 0 0 0 0 0 0 0 0 0 0 0 0 |
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97 %! 1 1 1 1 1 1 1 1 1 1 1 1 |
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98 %! 1 1 2 2 3 3 4 4 5 5 6 6]; |
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99 %! msh.t =[ 1 5 5 6 7 8 |
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100 %! 3 6 6 3 3 3 |
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101 %! 2 7 3 2 6 6 |
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102 %! 6 3 1 4 8 4 |
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103 %! 1 1 1 1 1 1]; |
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104 %! testfile = "object ""pos""\nclass array type float rank 1 shape 3 items 8 data follows\n 0.000000e+00 0.000000e+00 0.000000e+00\n 0.000000e+00 1.000000e+00 0.000000e+00\n 1.000000e+00 0.000000e+00 0.000000e+00\n 1.000000e+00 1.000000e+00 0.000000e+00\n 0.000000e+00 0.000000e+00 1.000000e+00\n 0.000000e+00 1.000000e+00 1.000000e+00\n 1.000000e+00 0.000000e+00 1.000000e+00\n 1.000000e+00 1.000000e+00 1.000000e+00\n\nobject ""con""\nclass array type int rank 1 shape 4 items 6 data follows\n 0 2 1 5\n 4 5 6 2\n 4 5 2 0\n 5 2 1 3\n 6 2 5 7\n 7 2 5 3\nattribute ""element type"" string ""tetrahedra""\nattribute ""ref"" string ""positions""\n\nobject ""themesh"" class field\ncomponent ""positions"" value ""pos""\ncomponent ""connections"" value ""con""\n\nend\n"; |
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105 %! FPL3dxoutputmesh ("__FPL3dxoutputmesh__test__.dx",msh); |
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106 %! fid = fopen("__FPL3dxoutputmesh__test__.dx","r"); |
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107 %! s = fread(fid); |
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108 %! fclose(fid); |
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109 %! assert (char(s'), testfile); |
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110 %! delete __FPL3dxoutputmesh__test__.dx |
