source: trunk/src/find_field_bounds.m @ 924

Last change on this file since 924 was 924, checked in by g7moreau, 5 years ago
  • Update Copyright Copyright 2008-2016, LEGI UMR 5519 / CNRS UGA G-INP, Grenoble, France
File size: 4.4 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 2008-2016, 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;
49if  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));
56for ind=1:numel(imax)
57    if strcmp(CellInfo{imax(ind)}.CoordType,'tps')
58        CoordName=Field.ListVarName{CellInfo{imax(ind)}.CoordIndex};% X,Y coordinates in a single variable
59        CoordMax(ind,NbDim)=max(max(Field.(CoordName)(1:end-3,1,:),[],1),[],3);% max of x component (2D case)
60        CoordMax(ind,NbDim-1)=max(max(Field.(CoordName)(1:end-3,2,:),[],1),[],3);% max of y component (2D case)
61        CoordMin(ind,NbDim)=min(min(Field.(CoordName)(1:end-3,1,:),[],1),[],3);
62        CoordMin(ind,NbDim-1)=min(min(Field.(CoordName)(1:end-3,2,:),[],1),[],3);% min of y component (2D case)
63    else
64        if Check4D
65            CellInfo{imax(ind)}.CoordIndex(4:end)=[];
66        end
67        XName=Field.ListVarName{CellInfo{imax(ind)}.CoordIndex(end)};
68        YName=Field.ListVarName{CellInfo{imax(ind)}.CoordIndex(end-1)};
69        CoordMax(ind,NbDim)=max(max(Field.(XName)));
70        CoordMin(ind,NbDim)=min(min(Field.(XName)));
71        CoordMax(ind,NbDim-1)=max(max(Field.(YName)));
72        CoordMin(ind,NbDim-1)=min(min(Field.(YName)));
73        %         test_x=1;%test for unstructured coordinates
74        if NbDim==3
75            ZName=Field.ListVarName{CellInfo{imax(ind)}.CoordIndex(1)};
76            CoordMax(ind,NbDim-2)=max(max(Field.(ZName)));
77            CoordMin(ind,NbDim-2)=min(min(Field.(ZName)));
78        end
79    end
80    switch CellInfo{imax(ind)}.CoordType
81       
82        case {'scattered','tps'} %unstructured coordinates
83            NbPoints=CellInfo{imax(ind)}.CoordSize;% total nbre of points
84            Mesh(ind)=(prod(CoordMax(ind,:)-CoordMin(ind,:))/NbPoints)^(1/NbDim); %(volume or area per point)^(1/NbDim)
85        case 'grid'%structured coordinate
86            NbPoints=CellInfo{imax(ind)}.CoordSize;% nbre of points in each direction
87            if Check4D
88               NbPoints=NbPoints(1:3);
89            end
90            Mesh(ind)=min((CoordMax(ind,:)-CoordMin(ind,:))./(NbPoints-1));
91    end
92end
93Mesh=min(Mesh);
94FieldOut.XMax=max(CoordMax(:,end));
95FieldOut.XMin=min(CoordMin(:,end));
96FieldOut.YMax=max(CoordMax(:,end-1));
97FieldOut.YMin=min(CoordMin(:,end-1));
98if NbDim==3
99    FieldOut.ZMax=max(CoordMax(ind,1));
100    FieldOut.ZMin=min(CoordMin(ind,1));
101end
102% adjust the mesh to a value 1, 2 , 5 *10^n
103ord=10^(floor(log10(Mesh)));%order of magnitude
104if Mesh/ord>=5
105    FieldOut.CoordMesh=5*ord;
106elseif Mesh/ord>=2
107    FieldOut.CoordMesh=2*ord;
108else
109    FieldOut.CoordMesh=ord;
110end
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