source: trunk/src/find_field_bounds.m @ 1033

Last change on this file since 1033 was 1028, checked in by sommeria, 3 years ago

option for reading fields in terms of matrix index

File size: 6.0 KB
Line 
1%'find_field_bounds': % find the bounds and typical meshs of coordinates
2%-----------------------------------------------------------------------
3%function  FieldOut=find_field_bounds(Field)
4%-----------------------------------------------------------------------
5%OUTPUT
6%FieldOut copy of the input Field with the additional items:
7%  .XMin,.XMax,.YMin,.YMax,bounds for x and y
8%  .CoordMesh: typical mesh needed for automatic grids
9%
10%INPUT
11% Field: Matlab structure describing the input field
12%
13%=======================================================================
14% Copyright 2008-2018, LEGI UMR 5519 / CNRS UGA G-INP, Grenoble, France
15%   http://www.legi.grenoble-inp.fr
16%   Joel.Sommeria - Joel.Sommeria (A) legi.cnrs.fr
17%
18%     This file is part of the toolbox UVMAT.
19%
20%     UVMAT is free software; you can redistribute it and/or modify
21%     it under the terms of the GNU General Public License as published
22%     by the Free Software Foundation; either version 2 of the license,
23%     or (at your option) any later version.
24%
25%     UVMAT is distributed in the hope that it will be useful,
26%     but WITHOUT ANY WARRANTY; without even the implied warranty of
27%     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
28%     GNU General Public License (see LICENSE.txt) for more details.
29%=======================================================================
30
31function FieldOut=find_field_bounds(Field)
32
33FieldOut=Field;%default
34%% analyse input field
35[CellInfo,NbDimArray,errormsg]=find_field_cells(Field);% analyse  the input field structure
36if ~isempty(errormsg)
37    errormsg=['uvmat /refresh_field / find_field_cells / ' errormsg];% display error
38    return
39end
40
41NbDim=max(NbDimArray);% spatial dimension of the input field
42imax=find(NbDimArray==NbDim);% indices of field cells to consider
43Check4D=0;
44if NbDim>3
45    NbDim=3;
46    Check4D=1;
47end
48FieldOut.NbDim=NbDim;
49%if  NbDim<=1; return; end% stop here for 1D fields
50 
51%% get bounds and mesh (needed  to propose default options for projection objects)
52% if NbDim>1
53CoordMax=zeros(numel(imax),NbDim);
54CoordMin=zeros(numel(imax),NbDim);
55Mesh=zeros(1,numel(imax));
56FieldOut.ProjModeRequest='projection';%default
57for ind=1:numel(imax)
58    if strcmp(CellInfo{imax(ind)}.CoordType,'tps')
59        CoordName=Field.ListVarName{CellInfo{imax(ind)}.CoordIndex};% X,Y coordinates in a single variable
60        CoordMax(ind,NbDim)=max(max(Field.(CoordName)(1:end-3,1,:),[],1),[],3);% max of x component (2D case)
61        CoordMax(ind,NbDim-1)=max(max(Field.(CoordName)(1:end-3,2,:),[],1),[],3);% max of y component (2D case)
62        CoordMin(ind,NbDim)=min(min(Field.(CoordName)(1:end-3,1,:),[],1),[],3);
63        CoordMin(ind,NbDim-1)=min(min(Field.(CoordName)(1:end-3,2,:),[],1),[],3);% min of y component (2D case)
64    else
65        if Check4D
66            CellInfo{imax(ind)}.CoordIndex(4:end)=[];
67        end
68        if isempty(CellInfo{imax(ind)}.CoordIndex)
69            FieldName=CellInfo{imax(ind)}.FieldName;
70            DimList=Field.VarDimName{imax(ind)};
71            siz=size(DimList);
72
73            FieldOut.(DimList{end})=1:siz(end);
74            FieldOut.ListVarName=[FieldOut.ListVarName DimList(end)];
75            FieldOut.VarDimName=[FieldOut.VarDimName DimList(end)];
76            CoordMax(ind,numel(siz))=siz(end);
77            if numel(siz)>=2
78                FieldOut.(DimList{end-1})=1:siz(end-1);
79                CoordMax(ind,numel(siz)-1)=siz(end-1);
80                FieldOut.ListVarName=[FieldOut.ListVarName DimList(end-1)];
81                FieldOut.VarDimName=[FieldOut.VarDimName DimList(end-1)];
82            end
83            if numel(siz)>=3
84                FieldOut.(DimList{1})=1:siz(1);
85                CoordMax(ind,1)=siz(1);
86                FieldOut.ListVarName=[FieldOut.ListVarName DimList(1)];
87                FieldOut.VarDimName=[FieldOut.VarDimName DimList(1)];
88            end
89            CoordMin(ind,1:numel(siz))=1;
90            CellInfo{imax(ind)}.CoordSize=CoordMax(ind,:);
91        else
92            XName=Field.ListVarName{CellInfo{imax(ind)}.CoordIndex(end)};
93            YName=Field.ListVarName{CellInfo{imax(ind)}.CoordIndex(end-1)};
94            CoordMax(ind,NbDim)=max(max(Field.(XName)));
95            CoordMin(ind,NbDim)=min(min(Field.(XName)));
96            CoordMax(ind,NbDim-1)=max(max(Field.(YName)));
97            CoordMin(ind,NbDim-1)=min(min(Field.(YName)));
98            %         test_x=1;%test for unstructured coordinates
99            if NbDim==3
100                ZName=Field.ListVarName{CellInfo{imax(ind)}.CoordIndex(1)};
101                CoordMax(ind,NbDim-2)=max(max(Field.(ZName)));
102                CoordMin(ind,NbDim-2)=min(min(Field.(ZName)));
103            end
104        end
105    end
106    switch CellInfo{imax(ind)}.CoordType
107       
108        case {'scattered','tps'} %unstructured coordinates
109            NbPoints=CellInfo{imax(ind)}.CoordSize;% total nbre of points
110            Mesh(ind)=(prod(CoordMax(ind,:)-CoordMin(ind,:))/NbPoints)^(1/NbDim); %(volume or area per point)^(1/NbDim)
111        case 'grid'%structured coordinate
112            NbPoints=CellInfo{imax(ind)}.CoordSize;% nbre of points in each direction
113            if Check4D
114                NbPoints=NbPoints(1:3);
115            end
116            Mesh(ind)=min((CoordMax(ind,:)-CoordMin(ind,:))./(NbPoints-1));
117    end
118    if isfield(CellInfo{imax(ind)},'ProjModeRequest')
119        if strcmp(CellInfo{imax(ind)}.ProjModeRequest,'interp_tps')
120            FieldOut.ProjModeRequest='interp_tps';
121        end
122        if strcmp(CellInfo{imax(ind)}.ProjModeRequest,'interp_lin')&& ~strcmp(FieldOut.ProjModeRequest,'interp_tps')
123            FieldOut.ProjModeRequest='interp_lin';
124        end
125    end
126end
127Mesh=min(Mesh);
128FieldOut.XMax=max(CoordMax(:,end));
129FieldOut.XMin=min(CoordMin(:,end));
130FieldOut.YMax=max(CoordMax(:,end-1));
131FieldOut.YMin=min(CoordMin(:,end-1));
132if NbDim==3
133    FieldOut.ZMax=max(CoordMax(ind,1));
134    FieldOut.ZMin=min(CoordMin(ind,1));
135end
136% adjust the mesh to a value 1, 2 , 5 *10^n
137ord=10^(floor(log10(Mesh)));%order of magnitude
138if Mesh/ord>=5
139    FieldOut.CoordMesh=5*ord;
140elseif Mesh/ord>=2
141    FieldOut.CoordMesh=2*ord;
142else
143    FieldOut.CoordMesh=ord;
144end
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