function qc=v_rotmc2qc(mc)
%V_ROTMC2QC converts a matrix of complex quaternion matrices to a matrix of complex quaternion vectors
% Inputs:
%
%     MC(2m,2n,...)   mxn matrix of real quaternion matrices (each 2x2)
%
% Outputs:
%
%     QC(2m,n,...)   mxn matrix of real quaternion vectors (each 2x1)
%
% In matrix form, quaternions can be multiplied and added using normal matrix
% arithmetic. Each element of an mxn matrix of quaternions is itself a 2x2 block
% so the total dimension of MC is 2m x 2n.

%
%      Copyright (C) Mike Brookes 2000-2018
%      Version: $Id: v_rotmc2qc.m 10865 2018-09-21 17:22:45Z dmb $
%
%   VOICEBOX is a MATLAB toolbox for speech processing.
%   Home page: http://www.ee.ic.ac.uk/hp/staff/dmb/voicebox/voicebox.html
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%   This program is free software; you can redistribute it and/or modify
%   it under the terms of the GNU Lesser General Public License as published by
%   the Free Software Foundation; either version 3 of the License, or
%   (at your option) any later version.
%
%   This program 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 Lesser General Public License for more details.
%
%   You can obtain a copy of the GNU Lesser General Public License from
%   https://www.gnu.org/licenses/ .
%    See files gpl-3.0.txt and lgpl-3.0.txt included in this distribution.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
s=size(mc);
s(2)=s(2)/2; % half the size of dimension 2
mc=reshape(mc,s(1),[]);
qc=reshape(mc(:,1:2:end),s);
if ~nargout
    v_rotqr2ro([real(qc(1)); real(qc(2)); imag(qc(1)); imag(qc(2))]); % plot a rotated cube
end
