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function [CSX,port] = AddCurvePort( CSX, prio, portnr, R, start, stop, excite, varargin )
%[CSX,port] = AddCurvePort( CSX, prio, portnr, R, start, stop [, excite, varargin] )
%
% Creates a curve port (1-dimensional).
% The mesh must already be initialized.
%
% input:
% CSX: CSX-object created by InitCSX()
% prio: priority for excitation, metal, sheet and probe boxes
% portnr: (integer) number of the port
% R: internal resistance of the port
% start: 3D start rowvector for port definition
% stop: 3D end rowvector for port definition
% excite (optional): if true, the port will be switched on (see AddExcitation())
% Note: for legacy support a string will be accepted
% optional (key/values):
% varargin: optional additional excitations options, see also AddExcitation
% 'PortNamePrefix': a prefix to the port name
%
% output:
% CSX:
% port:
%
% example:
% start = [0 0 0]; stop = [0 0 12];
% this defines a lumped port in z-direction
% the excitation/probe is placed between start(1) and stop(1)
%
% (C) 2010 Sebastian Held <sebastian.held@uni-due.de>
% See also InitCSX AddExcitation
port.type='Lumped';
port.nr=portnr;
PortNamePrefix = '';
varargin_tmp = varargin;
for n=1:2:numel(varargin_tmp)
if strcmpi('PortNamePrefix',varargin_tmp{n})
PortNamePrefix = varargin_tmp{n+1};
varargin([n n+1]) = [];
end
end
% make row vector
start = reshape( start, 1, [] );
stop = reshape( stop , 1, [] );
% get grid
mesh{1} = sort(unique(CSX.RectilinearGrid.XLines));
mesh{2} = sort(unique(CSX.RectilinearGrid.YLines));
mesh{3} = sort(unique(CSX.RectilinearGrid.ZLines));
unit = CSX.RectilinearGrid.ATTRIBUTE.DeltaUnit;
% find port direction
dir = abs(stop - start);
[dummy,dir] = max(dir);
% other directions
dir1 = mod(dir,3)+1;
dir2 = mod(dir+1,3)+1;
% normalize start and stop
if start(dir) < stop(dir)
nstart = start;
nstop = stop;
else
nstart = stop;
nstop = start;
end
% snap to grid
start_idx = zeros(1,3);
stop_idx = zeros(1,3);
for n=1:3
start_idx(n) = interp1( mesh{n}, 1:numel(mesh{n}), nstart(n), 'nearest' );
stop_idx(n) = interp1( mesh{n}, 1:numel(mesh{n}), nstop(n), 'nearest' );
end
% calculate position
port_start_idx = start_idx;
port_stop_idx = stop_idx;
if abs(start_idx(dir) - stop_idx(dir)) ~= 1
% calc port position
idx = interp1( mesh{dir}, 1:numel(mesh{dir}), (nstart(dir)+nstop(dir))/2, 'nearest' );
idx1 = interp1( mesh{dir1}, 1:numel(mesh{dir1}), (nstart(dir1)+nstop(dir1))/2, 'nearest' );
idx2 = interp1( mesh{dir2}, 1:numel(mesh{dir2}), (nstart(dir2)+nstop(dir2))/2, 'nearest' );
port_start_idx(dir) = idx;
port_start_idx(dir1) = idx1;
port_start_idx(dir2) = idx2;
port_stop_idx(dir) = idx+1;
port_stop_idx(dir1) = idx1;
port_stop_idx(dir2) = idx2;
metalname = [PortNamePrefix 'port' num2str(portnr) '_PEC'];
CSX = AddMetal( CSX, metalname );
CSX = AddCurve( CSX, metalname, prio, [nstart.' [mesh{1}(port_start_idx(1));mesh{2}(port_start_idx(2));mesh{3}(port_start_idx(3))]] );
CSX = AddCurve( CSX, metalname, prio, [nstop.' [mesh{1}(port_stop_idx(1));mesh{2}(port_stop_idx(2));mesh{3}(port_stop_idx(3))]] );
end
% calculate position of resistive material
delta1_n = mesh{dir1}(port_start_idx(dir1)) - mesh{dir1}(port_start_idx(dir1)-1);
delta1_p = mesh{dir1}(port_start_idx(dir1)+1) - mesh{dir1}(port_start_idx(dir1));
delta2_n = mesh{dir2}(port_start_idx(dir2)) - mesh{dir2}(port_start_idx(dir2)-1);
delta2_p = mesh{dir2}(port_start_idx(dir2)+1) - mesh{dir2}(port_start_idx(dir2));
m_start = zeros(1,3);
m_stop = zeros(1,3);
for n=1:3
m_start(n) = mesh{n}(port_start_idx(n));
m_stop(n) = mesh{n}(port_stop_idx(n));
end
m_start(dir1) = m_start(dir1) - delta1_n/2;
m_stop(dir1) = m_stop(dir1) + delta1_p/2;
m_start(dir2) = m_start(dir2) - delta2_n/2;
m_stop(dir2) = m_stop(dir2) + delta2_p/2;
% calculate position of the voltage probe & excitation
v_start = [mesh{1}(port_start_idx(1)), mesh{2}(port_start_idx(2)), mesh{3}(port_start_idx(3))];
v_stop = [mesh{1}(port_stop_idx(1)), mesh{2}(port_stop_idx(2)), mesh{3}(port_stop_idx(3))];
% calculate position of the current probe
i_start = m_start;
i_stop = m_stop;
i_start(dir) = (i_start(dir)+i_stop(dir))/2;
i_stop(dir) = i_start(dir);
% create the probes
port.U_filename = [PortNamePrefix 'port_ut' num2str(portnr)];
weight = -1;
CSX = AddProbe( CSX, port.U_filename, 0, 'weight', weight );
CSX = AddBox( CSX, port.U_filename, prio, v_start, v_stop );
port.I_filename = [PortNamePrefix 'port_it' num2str(portnr)];
weight = 1;
CSX = AddProbe( CSX, port.I_filename, 1, 'weight', weight );
CSX = AddBox( CSX, port.I_filename, prio, i_start, i_stop );
% create port structure
port.drawingunit = unit;
% port.start = start;
% port.stop = stop;
% port.v_start = v_start;
% port.v_stop = v_stop;
% port.i_start = i_start;
% port.i_stop = i_stop;
% port.dir = dir;
% port.direction = direction;
% port.idx_cal = idx_cal;
% port.idx1 = idx1;
% port.idx1 = idx1;
if (nargin < 7)
excite = false;
end
% legacy support, will be removed at some point
if ischar(excite)
warning('CSXCAD:AddCurvePort','depreceated: a string as excite option is no longer supported and will be removed in the future, please use true or false');
if ~isempty(excite)
excite = true;
else
excite = false;
end
end
port.excite = excite;
% create excitation
if (excite)
% excitation of this port is enabled
port.excite = 1;
e_start = v_start;
e_stop = v_stop;
CSX = AddExcitation( CSX, [PortNamePrefix 'port_excite_' num2str(portnr)], 0, start_idx ~= stop_idx, varargin{:});
CSX = AddBox( CSX, [PortNamePrefix 'port_excite_' num2str(portnr)], prio, e_start, e_stop );
end
port.Feed_R = R;
if (R>0 && (~isinf(R)))
CSX = AddLumpedElement( CSX, [PortNamePrefix 'port_resist_' int2str(portnr)], dir-1, 'R', R);
CSX = AddBox( CSX, [PortNamePrefix 'port_resist_' int2str(portnr)], prio, v_start, v_stop );
elseif (R==0)
CSX = AddBox(CSX,metalname, prio, v_start, v_stop);
end
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