1 | function sel = clickpoint(V,N,varargin) |
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2 | % CLICKPOINT Select a point by clicking |
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3 | % SEL = CLICKPOINT(V) let the user click a point in the current |
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4 | % figure and returns the index v of the closest point (in Euclidean |
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5 | % norm) in the collection V. The 2xK matrix V has a a column for |
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6 | % each point. |
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7 | % |
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8 | % The user can abort the operation by pressing any key. In this case |
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9 | % the function returns the empty matrix. |
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10 | % |
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11 | % CLICKPOINT(V,N) selects N points in a row. The user can stop the |
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12 | % selection at any time by pressing any key. In this case the |
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13 | % partial selection is returned. This can be used in combination |
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14 | % with N=inf to get an arbitrary number of points. |
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15 | % |
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16 | % CLICKPOINT(V,N,'Opt',val,...) accepts the following options: |
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17 | % |
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18 | % 'PlotMarker' [0] |
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19 | % Put a marker as points are selected. The markers are |
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20 | % deleted on exiting the function. |
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21 | % |
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22 | % See also CLICK(). |
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23 | |
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24 | % AUTORIGHTS |
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25 | % Copyright (C) 2006 Andrea Vedaldi |
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26 | % |
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27 | % This file is part of VLUtil. |
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28 | % |
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29 | % VLUtil is free software; you can redistribute it and/or modify |
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30 | % it under the terms of the GNU General Public License as published by |
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31 | % the Free Software Foundation; either version 2, or (at your option) |
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32 | % any later version. |
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33 | % |
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34 | % This program is distributed in the hope that it will be useful, |
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35 | % but WITHOUT ANY WARRANTY; without even the implied warranty of |
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36 | % MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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37 | % GNU General Public License for more details. |
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38 | % |
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39 | % You should have received a copy of the GNU General Public License |
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40 | % along with this program; if not, write to the Free Software Foundation, |
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41 | % Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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42 | |
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43 | plot_marker = 0 ; |
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44 | for k=1:2:length(varargin) |
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45 | switch lower(varargin{k}) |
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46 | case 'plotmarker' |
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47 | plot_marker = varargin{k+1} ; |
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48 | otherwise |
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49 | error(['Uknown option ''', varargin{k}, '''.']) ; |
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50 | end |
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51 | end |
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52 | |
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53 | if nargin < 2 |
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54 | N=1; |
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55 | end |
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56 | |
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57 | if size(V,1) ~= 2 |
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58 | error('Array V should be 2xK') ; |
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59 | end |
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60 | |
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61 | % -------------------------------------------------------------------- |
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62 | % Do job |
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63 | % -------------------------------------------------------------------- |
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64 | |
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65 | fig = gcf ; |
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66 | is_hold = ishold(fig) ; |
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67 | hold on ; |
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68 | |
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69 | sel = [] ; |
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70 | h = [] ; |
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71 | for n=1:N |
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72 | P=click |
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73 | if ~isempty( P ) |
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74 | d = (V(1,:)-P(1)).^2 + (V(2,:)-P(2)).^2; |
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75 | [drop,v]=min(d(:)) ; |
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76 | if(plot_marker) |
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77 | h=[h plot(V(1,v),V(2,v),'go')] ; |
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78 | end |
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79 | sel = [sel v] ; |
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80 | else |
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81 | return ; |
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82 | end |
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83 | end |
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84 | |
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85 | if ~is_hold |
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86 | hold off ; |
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87 | end |
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88 | |
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89 | if( plot_marker ) |
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90 | pause(.1); |
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91 | delete(h) ; |
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92 | end |
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93 | |
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94 | |
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95 | |
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