1 | %'mask_proj': restrict input fields to a mask region, set to 0 outside
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2 | %--------------------------------------------------------------------------
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3 | % function [ProjData,errormsg]=mask_proj(FieldData,MaskData)
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4 | %
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5 | %AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
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6 | % Copyright Joel Sommeria, 2008, LEGI / CNRS-UJF-INPG, sommeria@coriolis-legi.org.
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7 | %AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
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8 | % This file is part of the toolbox UVMAT.
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9 | %
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10 | % UVMAT is free software; you can redistribute it and/or modify
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11 | % it under the terms of the GNU General Public License as published by
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12 | % the Free Software Foundation; either version 2 of the License, or
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13 | % (at your option) any later version.
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14 | %
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15 | % UVMAT is distributed in the hope that it will be useful,
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16 | % but WITHOUT ANY WARRANTY; without even the implied warranty of
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17 | % MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 | % GNU General Public License (file UVMAT/COPYING.txt) for more details.
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19 | %AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
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20 |
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21 | function [ProjData,errormsg]=mask_proj(FieldData,MaskData)
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22 | errormsg='';%default
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23 | ProjData=FieldData;
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24 |
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25 |
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26 | %% group the variables (fields of 'FieldData') in cells of variables with the same dimensions
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27 | [CellInfo,NbDimArray,errormsg]=find_field_cells(FieldData);
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28 | if ~isempty(errormsg)
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29 | errormsg=['error in proj_field/proj_plane:' errormsg];
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30 | return
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31 | end
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32 | [Npy,Npx]=size(MaskData.A);
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33 | DX=(MaskData.AX(2)-MaskData.AX(1))/(Npx-1);
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34 | DY=(MaskData.AY(2)-MaskData.AY(1))/(Npy-1);
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35 | for icell=1:numel(CellInfo)
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36 | if NbDimArray(icell)==2
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37 | XName=FieldData.ListVarName{CellInfo{icell}.CoordIndex(1)};
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38 | YName=FieldData.ListVarName{CellInfo{icell}.CoordIndex(2)};
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39 | if isfield(CellInfo{icell},'VarIndex_errorflag')
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40 | FFName=FieldData.ListVarName{CellInfo{icell}.VarIndex_errorflag};
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41 | else
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42 | FFName='FF';%default error (mask) flag name (if not already used)
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43 | if isfield(FieldData,'FF')
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44 | ind=1;
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45 | while isfield(FieldData,['FF_' num2str(ind)])
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46 | ind=ind+1;
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47 | end
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48 | FFName=['FF_' num2str(ind)];% append an index to the name of error flag, FF_1,FF_2...
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49 | end
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50 | ProjData.ListVarName=[FieldData.ListVarName {FFName}];
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51 | ProjData.VarDimName=[FieldData.VarDimName FieldData.VarDimName(CellInfo{icell}.CoordIndex(1))];
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52 | ProjData.VarAttribute{numel(FieldData.VarDimName)}.Role='errorflag';
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53 | end
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54 | switch CellInfo{icell}.CoordType;
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55 | case 'scattered'
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56 | mask_ind_i=round(0.5+(FieldData.(XName)-MaskData.AX(1))/DX);%nbpoint terms
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57 | mask_ind_j=round(0.5+(FieldData.(YName)-MaskData.AY(1))/DY);%nbpoint terms
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58 | checkin=mask_ind_j+Npy*(mask_ind_i-1);%array of mask indices for the nbpoints
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59 | checkin=checkin(mask_ind_i>=1 & mask_ind_i<=Npx & mask_ind_j>=1 & mask_ind_j<=Npy);%reduced array of mask indices (inside the image)
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60 | checkfalse=true(size(FieldData.(XName)));
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61 | MaskData.A=reshape(MaskData.A,1,[]);
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62 | checkfalse(MaskData.A(checkin)>200)=0;
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63 | for ivar=1:numel(CellInfo{icell}.VarIndex)
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64 | VarName=FieldData.ListVarName{CellInfo{icell}.VarIndex(ivar)};
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65 | ProjData.(VarName)(checkfalse)=0;
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66 | end
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67 | if ~isfield(CellInfo{icell},'VarIndex_errorflag')% an error flag already exists in the current cell
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68 | ProjData.(FFName)=zeros(size(ProjData.(VarName)));
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69 | end
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70 | ProjData.(FFName)(checkfalse)=1;
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71 | case 'grid'
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72 | Var1Name=FieldData.ListVarName{CellInfo{icell}.VarIndex(1)};
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73 | [Npy_field,Npx_field]=size(FieldData.(Var1Name));
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74 | DX_field=(FieldData.(XName)(end)-FieldData.(XName)(1))/(Npx_field-1);
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75 | DY_field=(FieldData.(YName)(end)-FieldData.(YName)(1))/(Npy_field-1);
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76 | XArray=FieldData.(XName)(1):DX_field:FieldData.(XName)(end);
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77 | YArray=FieldData.(YName)(1):DY_field:FieldData.(YName)(end);
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78 | XMask=MaskData.AX(1):DX:MaskData.AX(end);
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79 | YMask=MaskData.AY(end):-DY:MaskData.AY(1);
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80 | [XMask,YMask]=meshgrid(XMask,YMask);
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81 | Mask = interp2(XMask,YMask,MaskData.A,XArray,YArray','nearest');
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82 | Mask=Mask>200;
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83 | for ivar=1:numel(CellInfo{icell}.VarIndex)
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84 | VarName=FieldData.ListVarName{CellInfo{icell}.VarIndex(ivar)};
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85 | if ~strcmp(VarName,FFName)
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86 | ProjData.(VarName)=FieldData.(VarName).*Mask;
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87 | end
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88 | end
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89 | if isfield(CellInfo{icell},'VarIndex_errorflag')% an error flag already exists in the current cell
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90 | ProjData.(FFName)=FieldData.(FFName) | ~Mask;
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91 | else
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92 | ProjData.(FFName)= ~Mask;
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93 | end
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94 | end
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95 | end
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96 | end
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97 |
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98 |
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