[646] | 1 | %'mask_proj': restrict input fields to a mask region, set to 0 outside
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[639] | 2 | %--------------------------------------------------------------------------
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[646] | 3 | % function [ProjData,errormsg]=mask_proj(FieldData,MaskData)
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[639] | 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 | switch CellInfo{icell}.CoordType;
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| 38 | case 'scattered'
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| 39 | XName=FieldData.ListVarName{CellInfo{icell}.CoordIndex(1)};
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| 40 | YName=FieldData.ListVarName{CellInfo{icell}.CoordIndex(2)};
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| 41 | mask_ind_i=round(0.5+(FieldData.(XName)-MaskData.AX(1))/DX);%nbpoint terms
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| 42 | mask_ind_j=round(0.5+(FieldData.(YName)-MaskData.AY(1))/DY);%nbpoint terms
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| 43 | checkin=mask_ind_j+Npy*(mask_ind_i-1);%array of mask indices for the nbpoints
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| 44 | 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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| 45 | checkfalse=true(size(FieldData.(XName)));
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| 46 | MaskData.A=reshape(MaskData.A,1,[]);
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| 47 | checkfalse(MaskData.A(checkin)>200)=0;
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| 48 | if ~isfield(FieldData,'FF')
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| 49 | FieldData.FF=zeros(size(FieldData.(XName)));
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| 50 | FieldData.ListVarName=[FieldData.ListVarName {'FF'}];
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| 51 | FieldData.VarDimName=[FieldData.VarDimName FieldData.VarDimName(CellInfo{icell}.CoordIndex(1))];
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| 52 | FieldData.VarAttribute{numel(FieldData.VarDimName)}.Role='errorflag';
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| 53 | end
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| 54 | for ivar=1:numel(CellInfo{icell}.VarIndex)
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| 55 | VarName=FieldData.ListVarName{CellInfo{icell}.VarIndex(ivar)};
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| 56 | FieldData.(VarName)(checkfalse)=0;
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| 57 | FieldData.FF(checkfalse)=1;
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| 58 | end
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| 59 | case 'grid'
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| 60 | XName=FieldData.ListVarName{CellInfo{icell}.CoordIndex(1)};
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| 61 | YName=FieldData.ListVarName{CellInfo{icell}.CoordIndex(2)};
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| 62 | Var1Name=FieldData.ListVarName{CellInfo{icell}.VarIndex(1)};
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| 63 | [Npy_field,Npx_field]=size(FieldData.(Var1Name));
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| 64 | DX_field=(FieldData.(XName)(end)-FieldData.(XName)(1))/(Npx_field-1);
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| 65 | DY_field=(FieldData.(YName)(end)-FieldData.(YName)(1))/(Npy_field-1);
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| 66 | XArray=FieldData.(XName)(1):DX_field:FieldData.(XName)(end);
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| 67 | YArray=FieldData.(YName)(1):DY_field:FieldData.(YName)(end);
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| 68 | XMask=MaskData.AX(1):DX:MaskData.AX(end);
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| 69 | YMask=MaskData.AY(end):-DY:MaskData.AY(1);
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| 70 | [XMask,YMask]=meshgrid(XMask,YMask);
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| 71 | Mask = interp2(XMask,YMask,MaskData.A,XArray,YArray','nearest');
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| 72 | figure(1)
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| 73 | image(MaskData.A)
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| 74 | Mask=Mask>200;
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| 75 | if ~isfield(FieldData,'FF')
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| 76 | FieldData.FF=zeros(size(FieldData.(XName)));
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| 77 | FieldData.ListVarName=[FieldData.ListVarName {'FF'}];
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| 78 | FieldData.VarDimName=[FieldData.VarDimName FieldData.VarDimName(CellInfo{icell}.CoordIndex(1))];
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| 79 | FieldData.VarAttribute{numel(FieldData.VarDimName)}.Role='errorflag';
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| 80 | end
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| 81 | for ivar=1:numel(CellInfo{icell}.VarIndex)
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| 82 | VarName=FieldData.ListVarName{CellInfo{icell}.VarIndex(ivar)};
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| 83 | FieldData.(VarName)=FieldData.(VarName).*Mask;
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| 84 | FieldData.FF=~Mask;
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| 85 | end
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| 86 | end
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| 87 | end
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| 88 | end
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| 89 |
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| 90 |
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