68 lines
2.1 KiB
Matlab
68 lines
2.1 KiB
Matlab
function FDTD = SetBoundaryCond(FDTD, BC, varargin)
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% FDTD = SetBoundaryCond(FDTD, BC, varargin)
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%
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% BC = [xmin xmax ymin ymax zmin zmax];
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% or BC = {xmin xmax ymin ymax zmin zmax};
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% ?min/?max:
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% 0 = PEC or 'PEC'
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% 1 = PMC or 'PMC'
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% 2 = MUR-ABC or 'MUR'
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% 3 = PML-ABC or 'PML_x' with pml size x => 4..50
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%
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% example:
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% BC = [ 1 1 0 0 2 3 ] %using numbers or
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% BC = {'PMC' 'PMC' 'PEC' 'PEC' 'MUR' 'PML_8'} %using equivalent strings
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%
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% mur-abc definitions
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% define a phase-velocity to be used by the mur-abc
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% useful e.g. for dispersive waveguides
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% FDTD = SetBoundaryCond(FDTD,BC,'MUR_PhaseVelocity',299792457.93272);
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%
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%
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% pml definitions
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% arguments: 'PML_Grading','gradFunction'
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% Define the pml grading grading function.
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% Predefined variables in this grading function are:
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% D = depth in the pml in meter
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% dl = mesh delta inside the pml in meter
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% W = width (length) of the pml in meter
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% N = number of cells for the pml
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% Z = wave impedance at the current depth and position
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%
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% example:
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% FDTD = SetBoundaryCond(FDTD,BC);
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% or
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% FDTD = SetBoundaryCond(FDTD,BC,'PML_Grading','-log(1e-6)*log(2.5)/(2*dl*pow(2.5,W/dl)-1) * pow(2.5, D/dl) / Z');
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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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if (numel(BC)~=6)
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error('openEMS:SetBoundaryCond','wrong number of boundary conditions');
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end
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if isnumeric(BC)
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FDTD.BoundaryCond.ATTRIBUTE.xmin=BC(1);
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FDTD.BoundaryCond.ATTRIBUTE.xmax=BC(2);
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FDTD.BoundaryCond.ATTRIBUTE.ymin=BC(3);
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FDTD.BoundaryCond.ATTRIBUTE.ymax=BC(4);
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FDTD.BoundaryCond.ATTRIBUTE.zmin=BC(5);
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FDTD.BoundaryCond.ATTRIBUTE.zmax=BC(6);
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elseif iscell(BC)
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FDTD.BoundaryCond.ATTRIBUTE.xmin=BC{1};
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FDTD.BoundaryCond.ATTRIBUTE.xmax=BC{2};
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FDTD.BoundaryCond.ATTRIBUTE.ymin=BC{3};
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FDTD.BoundaryCond.ATTRIBUTE.ymax=BC{4};
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FDTD.BoundaryCond.ATTRIBUTE.zmin=BC{5};
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FDTD.BoundaryCond.ATTRIBUTE.zmax=BC{6};
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else
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error('openEMS:SetBoundaryCond','unknown boundary condition type');
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end
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for n=1:(nargin-2)/2
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FDTD.BoundaryCond.ATTRIBUTE.(varargin{2*n-1}) = varargin{2*n};
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end
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