95 lines
2.5 KiB
Matlab
95 lines
2.5 KiB
Matlab
function Dump2VTK(filename, fields, mesh, fieldname)
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% Dump2VTK(filename, fields, mesh, fieldname)
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%
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% Dump fields extraced from an hdf5 file to a vtk file format
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%
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% example:
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%
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%
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% openEMS matlab interface
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% -----------------------
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% author: Thorsten Liebig
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%
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% See also ReadHDF5FieldData ReadHDF5Mesh GetField_TD2FD GetField_Interpolation
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x = mesh.lines{1};
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y = mesh.lines{2};
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z = mesh.lines{3};
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fid = fopen(filename,'w+');
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if (mesh.type==0) %write cartesian mesh to vtk
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fprintf(fid,'# vtk DataFile Version 2.0\n');
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fprintf(fid,'Rectilinear Grid by matlab-interface of openEMS\n');
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fprintf(fid,'ASCII\n');
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fprintf(fid,'DATASET RECTILINEAR_GRID\n');
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fprintf(fid,'DIMENSIONS %d %d %d\n',numel(x),numel(y),numel(z));
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fprintf(fid,'X_COORDINATES %d float\n',numel(x));
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fprintf(fid,'%e',x(1));
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for n=2:numel(x)
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fprintf(fid,' %e',x(n));
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end
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fprintf(fid,'\n');
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fprintf(fid,'Y_COORDINATES %d float\n',numel(y));
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fprintf(fid,'%e',y(1));
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for n=2:numel(y)
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fprintf(fid,' %e',y(n));
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end
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fprintf(fid,'\n');
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fprintf(fid,'Z_COORDINATES %d float\n',numel(z));
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fprintf(fid,'%e',z(1));
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for n=2:numel(z)
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fprintf(fid,' %e',z(n));
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end
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elseif (mesh.type==1) %write cylindrical mesh to vtk
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fprintf(fid,'# vtk DataFile Version 3.0\n');
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fprintf(fid,'Structured Grid by matlab-interface of openEMS\n');
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fprintf(fid,'ASCII\n');
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fprintf(fid,'DATASET STRUCTURED_GRID\n');
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fprintf(fid,'DIMENSIONS %d %d %d\n',numel(x),numel(y),numel(z));
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fprintf(fid,'POINTS %d float\n',numel(x)*numel(y)*numel(z));
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for nz=1:numel(z)
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for ny=1:numel(y)
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for nx=1:numel(x)
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fprintf(fid,'%e %e %e\n',x(nx)*cos(y(ny)),x(nx)*sin(y(ny)),z(nz));
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end
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end
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end
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[R A Z] = ndgrid(x,y,z);
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sinA = sin(A);
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cosA = cos(A);
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field_CC(:,:,:,1) = fields(:,:,:,1) .* cosA - fields(:,:,:,2) .* sinA;
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field_CC(:,:,:,2) = fields(:,:,:,1) .* sinA + fields(:,:,:,2) .* cosA;
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field_CC(:,:,:,3) = fields(:,:,:,3);
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fields = field_CC;
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clear R A Z sinA cosA field_CC
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end
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fprintf(fid,'\n\n');
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fprintf(fid,'POINT_DATA %d\n',numel(x)*numel(y)*numel(z));
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if (nargin>3)
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fprintf(fid,['VECTORS ' fieldname ' float\n']);
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else
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fprintf(fid,'VECTORS field float\n');
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end
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for nz=1:numel(z)
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for ny=1:numel(y)
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for nx=1:numel(x)
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fprintf(fid,'%e %e %e\n',fields(nx,ny,nz,1),fields(nx,ny,nz,2),fields(nx,ny,nz,3));
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end
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end
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end
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fclose(fid);
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