function clearDoseMeshes(varargin)
%function clearDoseMeshes()
%This function clears all the surface meshes for passed dose uidC.
%Note that the contour levels which are cleared depend on the current
%selections.
%
%APA, 06/21/07
%
% Copyright 2010, Joseph O. Deasy, on behalf of the CERR development team.
% 
% This file is part of The Computational Environment for Radiotherapy Research (CERR).
% 
% CERR development has been led by:  Aditya Apte, Divya Khullar, James Alaly, and Joseph O. Deasy.
% 
% CERR has been financially supported by the US National Institutes of Health under multiple grants.
% 
% CERR is distributed under the terms of the Lesser GNU Public License. 
% 
%     This version of CERR is free software: you can redistribute it and/or modify
%     it under the terms of the GNU General Public License as published by
%     the Free Software Foundation, either version 3 of the License, or
%     (at your option) any later version.
% 
% CERR is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
% without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
% See the GNU General Public License for more details.
% 
% You should have received a copy of the GNU General Public License
% along with CERR.  If not, see <http://www.gnu.org/licenses/>.


global planC
indexS = planC{end};


if isempty(varargin)
    doseNumToClear = 1:length(planC{indexS.dose});
else
    uidC = varargin{1};
    doseNumToClear = getAssociatedDose(uidC);
end

%Set Matlab path to directory containing the library
currDir = cd;

if ispc
    meshDir = fileparts(which('libMeshContour.dll'));
    cd(meshDir);
    loadlibrary('libMeshContour','MeshContour.h');
elseif isunix
    meshDir = fileparts(which('libMeshContour.so'));
    cd(meshDir);
    loadlibrary('libMeshContour.so','MeshContour.h');
end
%Clear existing dose meshes
waitbarH = waitbar(0,'Clearing surface meshes for dose...');
try
    contourLevels = getIsoDoseLevels;
    for doseNum = doseNumToClear
        doseUID = planC{indexS.dose}(doseNum).doseUID;
        for level = 1:length(contourLevels)
            calllib('libMeshContour','clear',[doseUID,'_',num2str(contourLevels(level))])
        end
        waitbar(doseNum/length(planC{indexS.dose}),waitbarH)
    end
end
close(waitbarH)
%switch back the current irectory
cd(currDir)
