68 lines
1.9 KiB
Matlab
68 lines
1.9 KiB
Matlab
function mesh = AddPML( mesh, numcells )
|
|
%mesh = AddPML( mesh, numcells )
|
|
%
|
|
% Adds equidistant cells to the specified directions of the simulation
|
|
% area. This is used to put a PML (perfectly matched layer) absorber there.
|
|
% Remember: this function only adds space for the PML, the boundary
|
|
% conditions need to be set correctly to really add PML material.
|
|
%
|
|
% The mesh is sorted and duplicate lines are removed.
|
|
%
|
|
% input:
|
|
% mesh: mesh structure
|
|
% .x: 1xn vector (lines in x direction)
|
|
% .y: 1xn vector (lines in y direction)
|
|
% .z: 1xn vector (lines in z direction)
|
|
% numcells: 1x6 vector (xmin,xmax,ymin,ymax,zmin,zmax) with number of
|
|
% cells to add to this direction
|
|
%
|
|
% output:
|
|
% mesh: new mesh
|
|
%
|
|
% openEMS matlab interface
|
|
% -----------------------
|
|
% Sebastian Held <sebastian.held@uni-due.de>
|
|
% See also DefineRectGrid
|
|
|
|
% check
|
|
error( nargchk(2,2,nargin) );
|
|
|
|
numcells = reshape( numcells, 1, [] );
|
|
if numel(numcells) ~= 6
|
|
error( 'argument numcells needs to have exactly 6 elements' );
|
|
end
|
|
|
|
mesh.x = unique(sort(mesh.x));
|
|
mesh.y = unique(sort(mesh.y));
|
|
mesh.z = unique(sort(mesh.z));
|
|
|
|
% xmin
|
|
delta = mesh.x(2) - mesh.x(1);
|
|
start = mesh.x(1) - numcells(1)*delta;
|
|
mesh.x = [start:delta:(mesh.x(1)-delta), mesh.x];
|
|
|
|
% xmax
|
|
delta = mesh.x(end) - mesh.x(end-1);
|
|
stop = mesh.x(end) + numcells(2)*delta;
|
|
mesh.x = [mesh.x, (mesh.x(end)+delta):delta:stop];
|
|
|
|
% ymin
|
|
delta = mesh.y(2) - mesh.y(1);
|
|
start = mesh.y(1) - numcells(3)*delta;
|
|
mesh.y = [start:delta:(mesh.y(1)-delta), mesh.y];
|
|
|
|
% ymax
|
|
delta = mesh.y(end) - mesh.y(end-1);
|
|
stop = mesh.y(end) + numcells(4)*delta;
|
|
mesh.y = [mesh.y, (mesh.y(end)+delta):delta:stop];
|
|
|
|
% zmin
|
|
delta = mesh.z(2) - mesh.z(1);
|
|
start = mesh.z(1) - numcells(5)*delta;
|
|
mesh.z = [start:delta:(mesh.z(1)-delta), mesh.z];
|
|
|
|
% zmax
|
|
delta = mesh.z(end) - mesh.z(end-1);
|
|
stop = mesh.z(end) + numcells(6)*delta;
|
|
mesh.z = [mesh.z, (mesh.z(end)+delta):delta:stop];
|