max@0: // Copyright (C) 2009-2010 NICTA (www.nicta.com.au)
max@0: // Copyright (C) 2009-2010 Conrad Sanderson
max@0: // Copyright (C) 2009-2010 Dimitrios Bouzas
max@0: // 
max@0: // This file is part of the Armadillo C++ library.
max@0: // It is provided without any warranty of fitness
max@0: // for any purpose. You can redistribute this file
max@0: // and/or modify it under the terms of the GNU
max@0: // Lesser General Public License (LGPL) as published
max@0: // by the Free Software Foundation, either version 3
max@0: // of the License or (at your option) any later version.
max@0: // (see http://www.opensource.org/licenses for more info)
max@0: 
max@0: 
max@0: //! \addtogroup glue_kron
max@0: //! @{
max@0: 
max@0: 
max@0: 
max@0: //! \brief
max@0: //! both input matrices have the same element type
max@0: template<typename eT>
max@0: inline
max@0: void
max@0: glue_kron::direct_kron(Mat<eT>& out, const Mat<eT>& A, const Mat<eT>& B)
max@0:   {
max@0:   arma_extra_debug_sigprint();
max@0:   
max@0:   const uword A_rows = A.n_rows;
max@0:   const uword A_cols = A.n_cols;
max@0:   const uword B_rows = B.n_rows;
max@0:   const uword B_cols = B.n_cols;
max@0:   
max@0:   out.set_size(A_rows*B_rows, A_cols*B_cols);
max@0:   
max@0:   for(uword i = 0; i < A_rows; i++)
max@0:     {
max@0:     for(uword j = 0; j < A_cols; j++)
max@0:       {
max@0:       out.submat(i*B_rows, j*B_cols, (i+1)*B_rows-1, (j+1)*B_cols-1) = A(i,j) * B; 
max@0:       }
max@0:     }  
max@0:   }
max@0: 
max@0: 
max@0: 
max@0: //! \brief
max@0: //! different types of input matrices
max@0: //! A -> complex, B -> basic element type
max@0: template<typename T>
max@0: inline
max@0: void
max@0: glue_kron::direct_kron(Mat< std::complex<T> >& out, const Mat< std::complex<T> >& A, const Mat<T>& B)
max@0:   {
max@0:   arma_extra_debug_sigprint();
max@0:   
max@0:   typedef typename std::complex<T> eT;
max@0:   
max@0:   const uword A_rows = A.n_rows;
max@0:   const uword A_cols = A.n_cols;
max@0:   const uword B_rows = B.n_rows;
max@0:   const uword B_cols = B.n_cols;
max@0:   
max@0:   out.set_size(A_rows*B_rows, A_cols*B_cols);
max@0:   
max@0:   Mat<eT> tmp_B = conv_to< Mat<eT> >::from(B);
max@0:   
max@0:   for(uword i = 0; i < A_rows; i++)
max@0:     {
max@0:     for(uword j = 0; j < A_cols; j++)
max@0:       {
max@0:       out.submat(i*B_rows, j*B_cols, (i+1)*B_rows-1, (j+1)*B_cols-1) = A(i,j) * tmp_B; 
max@0:       }
max@0:     }  
max@0:   }
max@0: 
max@0: 
max@0: 
max@0: //! \brief
max@0: //! different types of input matrices
max@0: //! A -> basic element type, B -> complex
max@0: template<typename T>
max@0: inline
max@0: void
max@0: glue_kron::direct_kron(Mat< std::complex<T> >& out, const Mat<T>& A, const Mat< std::complex<T> >& B)
max@0:   {
max@0:   arma_extra_debug_sigprint();
max@0:   
max@0:   const uword A_rows = A.n_rows;
max@0:   const uword A_cols = A.n_cols;
max@0:   const uword B_rows = B.n_rows;
max@0:   const uword B_cols = B.n_cols;
max@0:   
max@0:   out.set_size(A_rows*B_rows, A_cols*B_cols);
max@0:   
max@0:   for(uword i = 0; i < A_rows; i++)
max@0:     {
max@0:     for(uword j = 0; j < A_cols; j++)
max@0:       {
max@0:       out.submat(i*B_rows, j*B_cols, (i+1)*B_rows-1, (j+1)*B_cols-1) = A(i,j) * B; 
max@0:       }
max@0:     }  
max@0:   }
max@0: 
max@0: 
max@0: 
max@0: //! \brief
max@0: //! apply Kronecker product for two objects with same element type
max@0: template<typename T1, typename T2>
max@0: inline
max@0: void
max@0: glue_kron::apply(Mat<typename T1::elem_type>& out, const Glue<T1,T2,glue_kron>& X)
max@0:   {
max@0:   arma_extra_debug_sigprint();
max@0:   
max@0:   typedef typename T1::elem_type eT;
max@0:   
max@0:   const unwrap_check<T1> A_tmp(X.A, out);
max@0:   const unwrap_check<T2> B_tmp(X.B, out);
max@0:   
max@0:   const Mat<eT>& A = A_tmp.M;
max@0:   const Mat<eT>& B = B_tmp.M;
max@0:   
max@0:   glue_kron::direct_kron(out, A, B); 
max@0:   }
max@0: 
max@0: 
max@0: 
max@0: //! @}