libigl_Martin/include/igl/repmat.h

// This file is part of libigl, a simple c++ geometry processing library.
// 
// Copyright (C) 2013 Alec Jacobson <alecjacobson@gmail.com>
// 
// This Source Code Form is subject to the terms of the Mozilla Public License 
// v. 2.0. If a copy of the MPL was not distributed with this file, You can 
// obtain one at http://mozilla.org/MPL/2.0/.
#ifndef IGL_REPMAT_H
#define IGL_REPMAT_H
#include "igl_inline.h"

#define EIGEN_YES_I_KNOW_SPARSE_MODULE_IS_NOT_STABLE_YET
#include <Eigen/Dense>
#include <Eigen/Sparse>

namespace igl
{
  // At least for Dense matrices this is replaced by `replicate` e.g., dst = src.replicate(n,m);
  // http://forum.kde.org/viewtopic.php?f=74&t=90876#p173517

  // Ideally this is a super overloaded function that behaves just like
  // matlab's repmat

  // Replicate and tile a matrix
  //
  // Templates:
  //   T  should be a eigen matrix primitive type like int or double
  // Inputs:
  //   A  m by n input matrix
  //   r  number of row-direction copies
  //   c  number of col-direction copies
  // Outputs:
  //   B  r*m by c*n output matrix
  //
  template <typename DerivedA,typename DerivedB>
  IGL_INLINE void repmat(
    const Eigen::PlainObjectBase<DerivedA> & A,
    const int r,
    const int c,
    Eigen::PlainObjectBase<DerivedB> & B);
  template <typename T>
  IGL_INLINE void repmat(
    const Eigen::SparseMatrix<T> & A,
    const int r,
    const int c,
    Eigen::SparseMatrix<T> & B);
}

#ifndef IGL_STATIC_LIBRARY
#  include "repmat.cpp"
#endif

#endif