source: trunk/src/find_field_bounds.m @ 1086

Last change on this file since 1086 was 1078, checked in by sommeria, 13 months ago

various updates

File size: 5.9 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 2008-2020, 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
40NbDim=max(NbDimArray);% spatial dimension of the input field
41imax=find(NbDimArray==NbDim);% indices of field cells to consider
42Check4D=0;
43if NbDim>3
44    NbDim=3;
45    Check4D=1;
46end
47FieldOut.NbDim=NbDim;
48%if  NbDim<=1; return; end% stop here for 1D fields
49 
50%% get bounds and mesh (needed  to propose default options for projection objects)
51% if NbDim>1
52CoordMax=zeros(numel(imax),NbDim);
53CoordMin=zeros(numel(imax),NbDim);
54Mesh=zeros(1,numel(imax));
55FieldOut.ProjModeRequest='projection';%default
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        if isempty(CellInfo{imax(ind)}.CoordIndex)
68            FieldName=CellInfo{imax(ind)}.FieldName;
69            DimList=Field.VarDimName{imax(ind)};
70            siz=size(DimList);
71
72            FieldOut.(DimList{end})=1:siz(end);
73            FieldOut.ListVarName=[FieldOut.ListVarName DimList(end)];
74            FieldOut.VarDimName=[FieldOut.VarDimName DimList(end)];
75            CoordMax(ind,numel(siz))=siz(end);
76            if numel(siz)>=2
77                FieldOut.(DimList{end-1})=1:siz(end-1);
78                CoordMax(ind,numel(siz)-1)=siz(end-1);
79                FieldOut.ListVarName=[FieldOut.ListVarName DimList(end-1)];
80                FieldOut.VarDimName=[FieldOut.VarDimName DimList(end-1)];
81            end
82            if numel(siz)>=3
83                FieldOut.(DimList{1})=1:siz(1);
84                CoordMax(ind,1)=siz(1);
85                FieldOut.ListVarName=[FieldOut.ListVarName DimList(1)];
86                FieldOut.VarDimName=[FieldOut.VarDimName DimList(1)];
87            end
88            CoordMin(ind,1:numel(siz))=1;
89            CellInfo{imax(ind)}.CoordSize=CoordMax(ind,:);
90        else
91            XName=Field.ListVarName{CellInfo{imax(ind)}.CoordIndex(end)};
92            YName=Field.ListVarName{CellInfo{imax(ind)}.CoordIndex(end-1)};
93            CoordMax(ind,NbDim)=max(max(Field.(XName)));
94            CoordMin(ind,NbDim)=min(min(Field.(XName)));
95            CoordMax(ind,NbDim-1)=max(max(Field.(YName)));
96            CoordMin(ind,NbDim-1)=min(min(Field.(YName)));
97            %         test_x=1;%test for unstructured coordinates
98            if NbDim==3
99                ZName=Field.ListVarName{CellInfo{imax(ind)}.CoordIndex(1)};
100                CoordMax(ind,NbDim-2)=max(max(Field.(ZName)));
101                CoordMin(ind,NbDim-2)=min(min(Field.(ZName)));
102            end
103        end
104    end
105    switch CellInfo{imax(ind)}.CoordType
106       
107        case {'scattered','tps'} %unstructured coordinates
108            NbPoints=CellInfo{imax(ind)}.CoordSize;% total nbre of points
109            Mesh(ind)=(prod(CoordMax(ind,:)-CoordMin(ind,:))/NbPoints)^(1/NbDim); %(volume or area per point)^(1/NbDim)
110        case 'grid'%structured coordinate
111            NbPoints=CellInfo{imax(ind)}.CoordSize;% nbre of points in each direction
112            if Check4D
113                NbPoints=NbPoints(1:3);
114            end
115            Mesh(ind)=min((CoordMax(ind,:)-CoordMin(ind,:))./(NbPoints-1));
116    end
117    if isfield(CellInfo{imax(ind)},'ProjModeRequest')
118        if strcmp(CellInfo{imax(ind)}.ProjModeRequest,'interp_tps')
119            FieldOut.ProjModeRequest='interp_tps';
120        end
121        if strcmp(CellInfo{imax(ind)}.ProjModeRequest,'interp_lin')&& ~strcmp(FieldOut.ProjModeRequest,'interp_tps')
122            FieldOut.ProjModeRequest='interp_lin';
123        end
124    end
125end
126Mesh=min(Mesh);
127FieldOut.XMax=max(CoordMax(:,end));
128FieldOut.XMin=min(CoordMin(:,end));
129FieldOut.YMax=max(CoordMax(:,end-1));
130FieldOut.YMin=min(CoordMin(:,end-1));
131if NbDim==3
132    FieldOut.ZMax=max(CoordMax(ind,1));
133    FieldOut.ZMin=min(CoordMin(ind,1));
134end
135% adjust the mesh to a value 1, 2 , 5 *10^n
136FieldOut.CoordMesh = round_uvmat(Mesh);
137
138
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