DiagonalCoeffs.h

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// This file is part of Eigen, a lightweight C++ template library
// for linear algebra. Eigen itself is part of the KDE project.
//
// Copyright (C) 2006-2008 Benoit Jacob <jacob.benoit.1@gmail.com>
//
// Eigen 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.
//
// Alternatively, 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 2 of
// the License, or (at your option) any later version.
//
// Eigen 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 or the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License and a copy of the GNU General Public License along with
// Eigen. If not, see <http://www.gnu.org/licenses/>.

#ifndef EIGEN_DIAGONALCOEFFS_H
#define EIGEN_DIAGONALCOEFFS_H

template<typename MatrixType>
struct ei_traits<DiagonalCoeffs<MatrixType> >
{
  typedef typename MatrixType::Scalar Scalar;
  typedef typename ei_nested<MatrixType>::type MatrixTypeNested;
  typedef typename ei_unref<MatrixTypeNested>::type _MatrixTypeNested;
  enum {
    RowsAtCompileTime = int(MatrixType::SizeAtCompileTime) == Dynamic ? Dynamic
                      : EIGEN_SIZE_MIN(MatrixType::RowsAtCompileTime,
                                       MatrixType::ColsAtCompileTime),
    ColsAtCompileTime = 1,
    MaxRowsAtCompileTime = int(MatrixType::MaxSizeAtCompileTime) == Dynamic ? Dynamic
                            : EIGEN_SIZE_MIN(MatrixType::MaxRowsAtCompileTime,
                                             MatrixType::MaxColsAtCompileTime),
    MaxColsAtCompileTime = 1,
    Flags = (unsigned int)_MatrixTypeNested::Flags & (HereditaryBits | LinearAccessBit),
    CoeffReadCost = _MatrixTypeNested::CoeffReadCost
  };
};

template<typename MatrixType> class DiagonalCoeffs
   : public MatrixBase<DiagonalCoeffs<MatrixType> >
{
  public:

    EIGEN_GENERIC_PUBLIC_INTERFACE(DiagonalCoeffs)

    inline DiagonalCoeffs(const MatrixType& matrix) : m_matrix(matrix) {}

    EIGEN_INHERIT_ASSIGNMENT_OPERATORS(DiagonalCoeffs)

    inline int rows() const { return std::min(m_matrix.rows(), m_matrix.cols()); }
    inline int cols() const { return 1; }

    inline Scalar& coeffRef(int row, int)
    {
      return m_matrix.const_cast_derived().coeffRef(row, row);
    }

    inline const Scalar coeff(int row, int) const
    {
      return m_matrix.coeff(row, row);
    }

    inline Scalar& coeffRef(int index)
    {
      return m_matrix.const_cast_derived().coeffRef(index, index);
    }

    inline const Scalar coeff(int index) const
    {
      return m_matrix.coeff(index, index);
    }

  protected:

    const typename MatrixType::Nested m_matrix;
};

template<typename Derived>
inline DiagonalCoeffs<Derived>
MatrixBase<Derived>::diagonal()
{
  return DiagonalCoeffs<Derived>(derived());
}

template<typename Derived>
inline const DiagonalCoeffs<Derived>
MatrixBase<Derived>::diagonal() const
{
  return DiagonalCoeffs<Derived>(derived());
}

#endif // EIGEN_DIAGONALCOEFFS_H

---

vcglib
Author(s): Christian Bersch
autogenerated on Fri Jan 11 09:17:02 2013