function [ep,amr,amt] = dip(cdip,r0)
%DIP - UNKNOWN, move to archive?
% function [ep,amr,amt] = dip(cdip,r0)

%<autobegin> ---------------------- 26-May-2004 11:30:10 -----------------------
% --------- Automatically Generated Comments Block Using AUTO_COMMENTS ---------
%
% CATEGORY: Utility - General
%
% At Check-in: $Author: Mosher $  $Revision: 15 $  $Date: 5/26/04 9:59a $
%
% This software is part of BrainStorm Toolbox Version 2.0 (Alpha) 24-May-2004
% 
% Principal Investigators and Developers:
% ** Richard M. Leahy, PhD, Signal & Image Processing Institute,
%    University of Southern California, Los Angeles, CA
% ** John C. Mosher, PhD, Biophysics Group,
%    Los Alamos National Laboratory, Los Alamos, NM
% ** Sylvain Baillet, PhD, Cognitive Neuroscience & Brain Imaging Laboratory,
%    CNRS, Hopital de la Salpetriere, Paris, France
% 
% See BrainStorm website at http://neuroimage.usc.edu for further information.
% 
% Copyright (c) 2004 BrainStorm by the University of Southern California
% This software distributed  under the terms of the GNU General Public License
% as published by the Free Software Foundation. Further details on the GPL
% license can be found at http://www.gnu.org/copyleft/gpl.html .
% 
% FOR RESEARCH PURPOSES ONLY. THE SOFTWARE IS PROVIDED "AS IS," AND THE
% UNIVERSITY OF SOUTHERN CALIFORNIA AND ITS COLLABORATORS DO NOT MAKE ANY
% WARRANTY, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO WARRANTIES OF
% MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, NOR DO THEY ASSUME ANY
% LIABILITY OR RESPONSIBILITY FOR THE USE OF THIS SOFTWARE.
%<autoend> ------------------------ 26-May-2004 11:30:10 -----------------------

ep(:,3)=[1;1;1];
if (r0~=0)
   ep(:,3)=cdip(1:3)'/r0;
end
amr=cdip(4:6)*ep(:,3);
ep(:,1)=cdip(4:6)'-amr*ep(:,3);
amt=norm(ep(:,1),2);
if (amt~=0)
   ep(:,1)=ep(:,1)/amt;
   ep(1,2)=ep(2,3)*ep(3,1)-ep(2,1)*ep(3,3);
   ep(2,2)=ep(3,3)*ep(1,1)-ep(3,1)*ep(1,3);
   ep(3,2)=ep(1,3)*ep(2,1)-ep(1,1)*ep(2,3);
end

