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1 ## Copyright (C) 2004-2008 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} {} FPL2pdequiver (@var{mesh}, @ |
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32 ## @var{vx}, @var{vy}, [ @var{property}, @var{value} ...]) |
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33 ## |
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34 ## Plots the 2D vector field @var{vx}, @var{vy} |
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35 ## defined on the triangulation @var{mesh} using opendx. |
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36 ## |
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37 ## Options (default values): |
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38 ## @var{sample_density} (100) |
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39 ## |
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40 ## @seealso{FPL2pdesurf, FPL2ptcsurf, FPL2ptcquiver} |
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41 ## @end deftypefn |
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42 |
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43 function FPL2pdequiver(mesh,vecfieldx,vecfieldy,varargin); |
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44 |
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45 sample_density = "100"; |
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46 |
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47 if( (nargin >= 3) && (rem(nargin,2)==1) ) |
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48 for ii=1:2:length(varargin) |
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49 [ varargin{ii} " = " varargin{ii+1} ";" ] |
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50 eval([ varargin{ii} " = """ varargin{ii+1} """;" ]); |
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51 endfor |
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52 else |
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53 error(["wrong number of parameters " num2str (nargin)]) |
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54 endif |
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55 |
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56 JX = sum(vecfieldx,1)'/3; |
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57 JY = sum(vecfieldy,1)'/3; |
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58 |
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59 dataname = mktemp("/tmp",".dx"); |
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60 scriptname = mktemp("/tmp",".net"); |
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61 |
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62 FPL2dxoutputdata(dataname,mesh.p,mesh.t,[ JX JY],'J',1,2,1); |
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63 |
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64 showmesh = file_in_path(path,"FPL2pdequiver.net"); |
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65 |
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66 system (["cp " showmesh " " scriptname]); |
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67 system (["sed -i \'s|__FILE__DX__|" dataname "|g\' " scriptname]); |
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68 system (["sed -i \'s|__SAMPLE__DENSITY__|" sample_density "|g\' " scriptname]); |
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69 |
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70 command = ["dx -noConfirmedQuit -program " scriptname " -execute -image >& /dev/null & "]; |
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71 |
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72 system(command); |
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73 |
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74 |
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75 endfunction |
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76 |
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77 function filename = mktemp (direct,ext); |
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78 |
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79 if (~exist(direct,"dir")) |
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80 error("trying to save temporary file to non existing directory") |
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81 endif |
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82 |
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83 done=false; |
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84 |
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85 while ~done |
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86 filename = [direct,"/FPL.",num2str(floor(rand*1e7)),ext]; |
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87 if ~exist(filename,"file") |
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88 done =true; |
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89 endif |
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90 endwhile |
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91 |
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92 endfunction |
