Eigen/src/Geometry/Homogeneous.h - eigen/fuchsia - Git at Google

 // This file is part of Eigen, a lightweight C++ template library
 // for linear algebra.
 //
 // Copyright (C) 2009-2010 Gael Guennebaud <gael.guennebaud@inria.fr>
 //
 // 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 EIGEN_HOMOGENEOUS_H
 #define EIGEN_HOMOGENEOUS_H

 namespace Eigen {

 /** \geometry_module \ingroup Geometry_Module
   *
   * \class Homogeneous
   *
   * \brief Expression of one (or a set of) homogeneous vector(s)
   *
   * \param MatrixType the type of the object in which we are making homogeneous
   *
   * This class represents an expression of one (or a set of) homogeneous vector(s).
   * It is the return type of MatrixBase::homogeneous() and most of the time
   * this is the only way it is used.
   *
   * \sa MatrixBase::homogeneous()
   */

 namespace internal {

 template<typename MatrixType,int Direction>
 struct traits<Homogeneous<MatrixType,Direction> >
  : traits<MatrixType>
 {
   typedef typename traits<MatrixType>::StorageKind StorageKind;
   typedef typename nested<MatrixType>::type MatrixTypeNested;
   typedef typename remove_reference<MatrixTypeNested>::type _MatrixTypeNested;
   enum {
     RowsPlusOne = (MatrixType::RowsAtCompileTime != Dynamic) ?
                   int(MatrixType::RowsAtCompileTime) + 1 : Dynamic,
     ColsPlusOne = (MatrixType::ColsAtCompileTime != Dynamic) ?
                   int(MatrixType::ColsAtCompileTime) + 1 : Dynamic,
     RowsAtCompileTime = Direction==Vertical  ?  RowsPlusOne : MatrixType::RowsAtCompileTime,
     ColsAtCompileTime = Direction==Horizontal ? ColsPlusOne : MatrixType::ColsAtCompileTime,
     MaxRowsAtCompileTime = RowsAtCompileTime,
     MaxColsAtCompileTime = ColsAtCompileTime,
     TmpFlags = _MatrixTypeNested::Flags & HereditaryBits,
     Flags = ColsAtCompileTime==1 ? (TmpFlags & ~RowMajorBit)
           : RowsAtCompileTime==1 ? (TmpFlags | RowMajorBit)
           : TmpFlags,
     CoeffReadCost = _MatrixTypeNested::CoeffReadCost
   };
 };

 template<typename MatrixType,typename Lhs> struct homogeneous_left_product_impl;
 template<typename MatrixType,typename Rhs> struct homogeneous_right_product_impl;

 } // end namespace internal

 template<typename MatrixType,int _Direction> class Homogeneous
   : internal::no_assignment_operator, public MatrixBase<Homogeneous<MatrixType,_Direction> >
 {
   public:

     enum { Direction = _Direction };

     typedef MatrixBase<Homogeneous> Base;
     EIGEN_DENSE_PUBLIC_INTERFACE(Homogeneous)

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

     inline Index rows() const { return m_matrix.rows() + (int(Direction)==Vertical   ? 1 : 0); }
     inline Index cols() const { return m_matrix.cols() + (int(Direction)==Horizontal ? 1 : 0); }

     inline Scalar coeff(Index row, Index col) const
     {
       if(  (int(Direction)==Vertical   && row==m_matrix.rows())
         || (int(Direction)==Horizontal && col==m_matrix.cols()))
         return 1;
       return m_matrix.coeff(row, col);
     }

     template<typename Rhs>
     inline const internal::homogeneous_right_product_impl<Homogeneous,Rhs>
     operator* (const MatrixBase<Rhs>& rhs) const
     {
       eigen_assert(int(Direction)==Horizontal);
       return internal::homogeneous_right_product_impl<Homogeneous,Rhs>(m_matrix,rhs.derived());
     }

     template<typename Lhs> friend
     inline const internal::homogeneous_left_product_impl<Homogeneous,Lhs>
     operator* (const MatrixBase<Lhs>& lhs, const Homogeneous& rhs)
     {
       eigen_assert(int(Direction)==Vertical);
       return internal::homogeneous_left_product_impl<Homogeneous,Lhs>(lhs.derived(),rhs.m_matrix);
     }

     template<typename Scalar, int Dim, int Mode, int Options> friend
     inline const internal::homogeneous_left_product_impl<Homogeneous,Transform<Scalar,Dim,Mode,Options> >
     operator* (const Transform<Scalar,Dim,Mode,Options>& lhs, const Homogeneous& rhs)
     {
       eigen_assert(int(Direction)==Vertical);
       return internal::homogeneous_left_product_impl<Homogeneous,Transform<Scalar,Dim,Mode,Options> >(lhs,rhs.m_matrix);
     }

   protected:
     typename MatrixType::Nested m_matrix;
 };

 /** \geometry_module
   *
   * \return an expression of the equivalent homogeneous vector
   *
   * \only_for_vectors
   *
   * Example: \include MatrixBase_homogeneous.cpp
   * Output: \verbinclude MatrixBase_homogeneous.out
   *
   * \sa class Homogeneous
   */
 template<typename Derived>
 inline typename MatrixBase<Derived>::HomogeneousReturnType
 MatrixBase<Derived>::homogeneous() const
 {
   EIGEN_STATIC_ASSERT_VECTOR_ONLY(Derived);
   return derived();
 }

 /** \geometry_module
   *
   * \returns a matrix expression of homogeneous column (or row) vectors
   *
   * Example: \include VectorwiseOp_homogeneous.cpp
   * Output: \verbinclude VectorwiseOp_homogeneous.out
   *
   * \sa MatrixBase::homogeneous() */
 template<typename ExpressionType, int Direction>
 inline Homogeneous<ExpressionType,Direction>
 VectorwiseOp<ExpressionType,Direction>::homogeneous() const
 {
   return _expression();
 }

 /** \geometry_module
   *
   * \returns an expression of the homogeneous normalized vector of \c *this
   *
   * Example: \include MatrixBase_hnormalized.cpp
   * Output: \verbinclude MatrixBase_hnormalized.out
   *
   * \sa VectorwiseOp::hnormalized() */
 template<typename Derived>
 inline const typename MatrixBase<Derived>::HNormalizedReturnType
 MatrixBase<Derived>::hnormalized() const
 {
   EIGEN_STATIC_ASSERT_VECTOR_ONLY(Derived);
   return ConstStartMinusOne(derived(),0,0,
     ColsAtCompileTime==1?size()-1:1,
     ColsAtCompileTime==1?1:size()-1) / coeff(size()-1);
 }

 /** \geometry_module
   *
   * \returns an expression of the homogeneous normalized vector of \c *this
   *
   * Example: \include DirectionWise_hnormalized.cpp
   * Output: \verbinclude DirectionWise_hnormalized.out
   *
   * \sa MatrixBase::hnormalized() */
 template<typename ExpressionType, int Direction>
 inline const typename VectorwiseOp<ExpressionType,Direction>::HNormalizedReturnType
 VectorwiseOp<ExpressionType,Direction>::hnormalized() const
 {
   return HNormalized_Block(_expression(),0,0,
       Direction==Vertical   ? _expression().rows()-1 : _expression().rows(),
       Direction==Horizontal ? _expression().cols()-1 : _expression().cols()).cwiseQuotient(
       Replicate<HNormalized_Factors,
                 Direction==Vertical   ? HNormalized_SizeMinusOne : 1,
                 Direction==Horizontal ? HNormalized_SizeMinusOne : 1>
         (HNormalized_Factors(_expression(),
           Direction==Vertical    ? _expression().rows()-1:0,
           Direction==Horizontal  ? _expression().cols()-1:0,
           Direction==Vertical    ? 1 : _expression().rows(),
           Direction==Horizontal  ? 1 : _expression().cols()),
          Direction==Vertical   ? _expression().rows()-1 : 1,
          Direction==Horizontal ? _expression().cols()-1 : 1));
 }

 namespace internal {

 template<typename MatrixOrTransformType>
 struct take_matrix_for_product
 {
   typedef MatrixOrTransformType type;
   static const type& run(const type &x) { return x; }
 };

 template<typename Scalar, int Dim, int Mode,int Options>
 struct take_matrix_for_product<Transform<Scalar, Dim, Mode, Options> >
 {
   typedef Transform<Scalar, Dim, Mode, Options> TransformType;
   typedef typename internal::add_const<typename TransformType::ConstAffinePart>::type type;
   static type run (const TransformType& x) { return x.affine(); }
 };

 template<typename Scalar, int Dim, int Options>
 struct take_matrix_for_product<Transform<Scalar, Dim, Projective, Options> >
 {
   typedef Transform<Scalar, Dim, Projective, Options> TransformType;
   typedef typename TransformType::MatrixType type;
   static const type& run (const TransformType& x) { return x.matrix(); }
 };

 template<typename MatrixType,typename Lhs>
 struct traits<homogeneous_left_product_impl<Homogeneous<MatrixType,Vertical>,Lhs> >
 {
   typedef typename take_matrix_for_product<Lhs>::type LhsMatrixType;
   typedef typename remove_all<MatrixType>::type MatrixTypeCleaned;
   typedef typename remove_all<LhsMatrixType>::type LhsMatrixTypeCleaned;
   typedef typename make_proper_matrix_type<
                  typename traits<MatrixTypeCleaned>::Scalar,
                  LhsMatrixTypeCleaned::RowsAtCompileTime,
                  MatrixTypeCleaned::ColsAtCompileTime,
                  MatrixTypeCleaned::PlainObject::Options,
                  LhsMatrixTypeCleaned::MaxRowsAtCompileTime,
                  MatrixTypeCleaned::MaxColsAtCompileTime>::type ReturnType;
 };

 template<typename MatrixType,typename Lhs>
 struct homogeneous_left_product_impl<Homogeneous<MatrixType,Vertical>,Lhs>
   : public ReturnByValue<homogeneous_left_product_impl<Homogeneous<MatrixType,Vertical>,Lhs> >
 {
   typedef typename traits<homogeneous_left_product_impl>::LhsMatrixType LhsMatrixType;
   typedef typename remove_all<LhsMatrixType>::type LhsMatrixTypeCleaned;
   typedef typename remove_all<typename LhsMatrixTypeCleaned::Nested>::type LhsMatrixTypeNested;
   typedef typename MatrixType::Index Index;
   homogeneous_left_product_impl(const Lhs& lhs, const MatrixType& rhs)
     : m_lhs(take_matrix_for_product<Lhs>::run(lhs)),
       m_rhs(rhs)
   {}

   inline Index rows() const { return m_lhs.rows(); }
   inline Index cols() const { return m_rhs.cols(); }

   template<typename Dest> void evalTo(Dest& dst) const
   {
     // FIXME investigate how to allow lazy evaluation of this product when possible
     dst = Block<const LhsMatrixTypeNested,
               LhsMatrixTypeNested::RowsAtCompileTime,
               LhsMatrixTypeNested::ColsAtCompileTime==Dynamic?Dynamic:LhsMatrixTypeNested::ColsAtCompileTime-1>
             (m_lhs,0,0,m_lhs.rows(),m_lhs.cols()-1) * m_rhs;
     dst += m_lhs.col(m_lhs.cols()-1).rowwise()
             .template replicate<MatrixType::ColsAtCompileTime>(m_rhs.cols());
   }

   typename LhsMatrixTypeCleaned::Nested m_lhs;
   typename MatrixType::Nested m_rhs;
 };

 template<typename MatrixType,typename Rhs>
 struct traits<homogeneous_right_product_impl<Homogeneous<MatrixType,Horizontal>,Rhs> >
 {
   typedef typename make_proper_matrix_type<typename traits<MatrixType>::Scalar,
                  MatrixType::RowsAtCompileTime,
                  Rhs::ColsAtCompileTime,
                  MatrixType::PlainObject::Options,
                  MatrixType::MaxRowsAtCompileTime,
                  Rhs::MaxColsAtCompileTime>::type ReturnType;
 };

 template<typename MatrixType,typename Rhs>
 struct homogeneous_right_product_impl<Homogeneous<MatrixType,Horizontal>,Rhs>
   : public ReturnByValue<homogeneous_right_product_impl<Homogeneous<MatrixType,Horizontal>,Rhs> >
 {
   typedef typename remove_all<typename Rhs::Nested>::type RhsNested;
   typedef typename MatrixType::Index Index;
   homogeneous_right_product_impl(const MatrixType& lhs, const Rhs& rhs)
     : m_lhs(lhs), m_rhs(rhs)
   {}

   inline Index rows() const { return m_lhs.rows(); }
   inline Index cols() const { return m_rhs.cols(); }

   template<typename Dest> void evalTo(Dest& dst) const
   {
     // FIXME investigate how to allow lazy evaluation of this product when possible
     dst = m_lhs * Block<const RhsNested,
                         RhsNested::RowsAtCompileTime==Dynamic?Dynamic:RhsNested::RowsAtCompileTime-1,
                         RhsNested::ColsAtCompileTime>
             (m_rhs,0,0,m_rhs.rows()-1,m_rhs.cols());
     dst += m_rhs.row(m_rhs.rows()-1).colwise()
             .template replicate<MatrixType::RowsAtCompileTime>(m_lhs.rows());
   }

   typename MatrixType::Nested m_lhs;
   typename Rhs::Nested m_rhs;
 };

 } // end namespace internal

 } // end namespace Eigen

 #endif // EIGEN_HOMOGENEOUS_H
	// This file is part of Eigen, a lightweight C++ template library
	// for linear algebra.
	//
	// Copyright (C) 2009-2010 Gael Guennebaud <gael.guennebaud@inria.fr>
	//
	// 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 EIGEN_HOMOGENEOUS_H
	#define EIGEN_HOMOGENEOUS_H

	namespace Eigen {

	/** \geometry_module \ingroup Geometry_Module
	*
	* \class Homogeneous
	*
	* \brief Expression of one (or a set of) homogeneous vector(s)
	*
	* \param MatrixType the type of the object in which we are making homogeneous
	*
	* This class represents an expression of one (or a set of) homogeneous vector(s).
	* It is the return type of MatrixBase::homogeneous() and most of the time
	* this is the only way it is used.
	*
	* \sa MatrixBase::homogeneous()
	*/

	namespace internal {

	template<typename MatrixType,int Direction>
	struct traits<Homogeneous<MatrixType,Direction> >
	: traits<MatrixType>
	{
	typedef typename traits<MatrixType>::StorageKind StorageKind;
	typedef typename nested<MatrixType>::type MatrixTypeNested;
	typedef typename remove_reference<MatrixTypeNested>::type _MatrixTypeNested;
	enum {
	RowsPlusOne = (MatrixType::RowsAtCompileTime != Dynamic) ?
	int(MatrixType::RowsAtCompileTime) + 1 : Dynamic,
	ColsPlusOne = (MatrixType::ColsAtCompileTime != Dynamic) ?
	int(MatrixType::ColsAtCompileTime) + 1 : Dynamic,
	RowsAtCompileTime = Direction==Vertical ? RowsPlusOne : MatrixType::RowsAtCompileTime,
	ColsAtCompileTime = Direction==Horizontal ? ColsPlusOne : MatrixType::ColsAtCompileTime,
	MaxRowsAtCompileTime = RowsAtCompileTime,
	MaxColsAtCompileTime = ColsAtCompileTime,
	TmpFlags = _MatrixTypeNested::Flags & HereditaryBits,
	Flags = ColsAtCompileTime==1 ? (TmpFlags & ~RowMajorBit)
	: RowsAtCompileTime==1 ? (TmpFlags \| RowMajorBit)
	: TmpFlags,
	CoeffReadCost = _MatrixTypeNested::CoeffReadCost
	};
	};

	template<typename MatrixType,typename Lhs> struct homogeneous_left_product_impl;
	template<typename MatrixType,typename Rhs> struct homogeneous_right_product_impl;

	} // end namespace internal

	template<typename MatrixType,int _Direction> class Homogeneous
	: internal::no_assignment_operator, public MatrixBase<Homogeneous<MatrixType,_Direction> >
	{
	public:

	enum { Direction = _Direction };

	typedef MatrixBase<Homogeneous> Base;
	EIGEN_DENSE_PUBLIC_INTERFACE(Homogeneous)

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

	inline Index rows() const { return m_matrix.rows() + (int(Direction)==Vertical ? 1 : 0); }
	inline Index cols() const { return m_matrix.cols() + (int(Direction)==Horizontal ? 1 : 0); }

	inline Scalar coeff(Index row, Index col) const
	{
	if( (int(Direction)==Vertical && row==m_matrix.rows())
	\|\| (int(Direction)==Horizontal && col==m_matrix.cols()))
	return 1;
	return m_matrix.coeff(row, col);
	}

	template<typename Rhs>
	inline const internal::homogeneous_right_product_impl<Homogeneous,Rhs>
	operator* (const MatrixBase<Rhs>& rhs) const
	{
	eigen_assert(int(Direction)==Horizontal);
	return internal::homogeneous_right_product_impl<Homogeneous,Rhs>(m_matrix,rhs.derived());
	}

	template<typename Lhs> friend
	inline const internal::homogeneous_left_product_impl<Homogeneous,Lhs>
	operator* (const MatrixBase<Lhs>& lhs, const Homogeneous& rhs)
	{
	eigen_assert(int(Direction)==Vertical);
	return internal::homogeneous_left_product_impl<Homogeneous,Lhs>(lhs.derived(),rhs.m_matrix);
	}

	template<typename Scalar, int Dim, int Mode, int Options> friend
	inline const internal::homogeneous_left_product_impl<Homogeneous,Transform<Scalar,Dim,Mode,Options> >
	operator* (const Transform<Scalar,Dim,Mode,Options>& lhs, const Homogeneous& rhs)
	{
	eigen_assert(int(Direction)==Vertical);
	return internal::homogeneous_left_product_impl<Homogeneous,Transform<Scalar,Dim,Mode,Options> >(lhs,rhs.m_matrix);
	}

	protected:
	typename MatrixType::Nested m_matrix;
	};

	/** \geometry_module
	*
	* \return an expression of the equivalent homogeneous vector
	*
	* \only_for_vectors
	*
	* Example: \include MatrixBase_homogeneous.cpp
	* Output: \verbinclude MatrixBase_homogeneous.out
	*
	* \sa class Homogeneous
	*/
	template<typename Derived>
	inline typename MatrixBase<Derived>::HomogeneousReturnType
	MatrixBase<Derived>::homogeneous() const
	{
	EIGEN_STATIC_ASSERT_VECTOR_ONLY(Derived);
	return derived();
	}

	/** \geometry_module
	*
	* \returns a matrix expression of homogeneous column (or row) vectors
	*
	* Example: \include VectorwiseOp_homogeneous.cpp
	* Output: \verbinclude VectorwiseOp_homogeneous.out
	*
	* \sa MatrixBase::homogeneous() */
	template<typename ExpressionType, int Direction>
	inline Homogeneous<ExpressionType,Direction>
	VectorwiseOp<ExpressionType,Direction>::homogeneous() const
	{
	return _expression();
	}

	/** \geometry_module
	*
	* \returns an expression of the homogeneous normalized vector of \c *this
	*
	* Example: \include MatrixBase_hnormalized.cpp
	* Output: \verbinclude MatrixBase_hnormalized.out
	*
	* \sa VectorwiseOp::hnormalized() */
	template<typename Derived>
	inline const typename MatrixBase<Derived>::HNormalizedReturnType
	MatrixBase<Derived>::hnormalized() const
	{
	EIGEN_STATIC_ASSERT_VECTOR_ONLY(Derived);
	return ConstStartMinusOne(derived(),0,0,
	ColsAtCompileTime==1?size()-1:1,
	ColsAtCompileTime==1?1:size()-1) / coeff(size()-1);
	}

	/** \geometry_module
	*
	* \returns an expression of the homogeneous normalized vector of \c *this
	*
	* Example: \include DirectionWise_hnormalized.cpp
	* Output: \verbinclude DirectionWise_hnormalized.out
	*
	* \sa MatrixBase::hnormalized() */
	template<typename ExpressionType, int Direction>
	inline const typename VectorwiseOp<ExpressionType,Direction>::HNormalizedReturnType
	VectorwiseOp<ExpressionType,Direction>::hnormalized() const
	{
	return HNormalized_Block(_expression(),0,0,
	Direction==Vertical ? _expression().rows()-1 : _expression().rows(),
	Direction==Horizontal ? _expression().cols()-1 : _expression().cols()).cwiseQuotient(
	Replicate<HNormalized_Factors,
	Direction==Vertical ? HNormalized_SizeMinusOne : 1,
	Direction==Horizontal ? HNormalized_SizeMinusOne : 1>
	(HNormalized_Factors(_expression(),
	Direction==Vertical ? _expression().rows()-1:0,
	Direction==Horizontal ? _expression().cols()-1:0,
	Direction==Vertical ? 1 : _expression().rows(),
	Direction==Horizontal ? 1 : _expression().cols()),
	Direction==Vertical ? _expression().rows()-1 : 1,
	Direction==Horizontal ? _expression().cols()-1 : 1));
	}

	namespace internal {

	template<typename MatrixOrTransformType>
	struct take_matrix_for_product
	{
	typedef MatrixOrTransformType type;
	static const type& run(const type &x) { return x; }
	};

	template<typename Scalar, int Dim, int Mode,int Options>
	struct take_matrix_for_product<Transform<Scalar, Dim, Mode, Options> >
	{
	typedef Transform<Scalar, Dim, Mode, Options> TransformType;
	typedef typename internal::add_const<typename TransformType::ConstAffinePart>::type type;
	static type run (const TransformType& x) { return x.affine(); }
	};

	template<typename Scalar, int Dim, int Options>
	struct take_matrix_for_product<Transform<Scalar, Dim, Projective, Options> >
	{
	typedef Transform<Scalar, Dim, Projective, Options> TransformType;
	typedef typename TransformType::MatrixType type;
	static const type& run (const TransformType& x) { return x.matrix(); }
	};

	template<typename MatrixType,typename Lhs>
	struct traits<homogeneous_left_product_impl<Homogeneous<MatrixType,Vertical>,Lhs> >
	{
	typedef typename take_matrix_for_product<Lhs>::type LhsMatrixType;
	typedef typename remove_all<MatrixType>::type MatrixTypeCleaned;
	typedef typename remove_all<LhsMatrixType>::type LhsMatrixTypeCleaned;
	typedef typename make_proper_matrix_type<
	typename traits<MatrixTypeCleaned>::Scalar,
	LhsMatrixTypeCleaned::RowsAtCompileTime,
	MatrixTypeCleaned::ColsAtCompileTime,
	MatrixTypeCleaned::PlainObject::Options,
	LhsMatrixTypeCleaned::MaxRowsAtCompileTime,
	MatrixTypeCleaned::MaxColsAtCompileTime>::type ReturnType;
	};

	template<typename MatrixType,typename Lhs>
	struct homogeneous_left_product_impl<Homogeneous<MatrixType,Vertical>,Lhs>
	: public ReturnByValue<homogeneous_left_product_impl<Homogeneous<MatrixType,Vertical>,Lhs> >
	{
	typedef typename traits<homogeneous_left_product_impl>::LhsMatrixType LhsMatrixType;
	typedef typename remove_all<LhsMatrixType>::type LhsMatrixTypeCleaned;
	typedef typename remove_all<typename LhsMatrixTypeCleaned::Nested>::type LhsMatrixTypeNested;
	typedef typename MatrixType::Index Index;
	homogeneous_left_product_impl(const Lhs& lhs, const MatrixType& rhs)
	: m_lhs(take_matrix_for_product<Lhs>::run(lhs)),
	m_rhs(rhs)
	{}

	inline Index rows() const { return m_lhs.rows(); }
	inline Index cols() const { return m_rhs.cols(); }

	template<typename Dest> void evalTo(Dest& dst) const
	{
	// FIXME investigate how to allow lazy evaluation of this product when possible
	dst = Block<const LhsMatrixTypeNested,
	LhsMatrixTypeNested::RowsAtCompileTime,
	LhsMatrixTypeNested::ColsAtCompileTime==Dynamic?Dynamic:LhsMatrixTypeNested::ColsAtCompileTime-1>
	(m_lhs,0,0,m_lhs.rows(),m_lhs.cols()-1) * m_rhs;
	dst += m_lhs.col(m_lhs.cols()-1).rowwise()
	.template replicate<MatrixType::ColsAtCompileTime>(m_rhs.cols());
	}

	typename LhsMatrixTypeCleaned::Nested m_lhs;
	typename MatrixType::Nested m_rhs;
	};

	template<typename MatrixType,typename Rhs>
	struct traits<homogeneous_right_product_impl<Homogeneous<MatrixType,Horizontal>,Rhs> >
	{
	typedef typename make_proper_matrix_type<typename traits<MatrixType>::Scalar,
	MatrixType::RowsAtCompileTime,
	Rhs::ColsAtCompileTime,
	MatrixType::PlainObject::Options,
	MatrixType::MaxRowsAtCompileTime,
	Rhs::MaxColsAtCompileTime>::type ReturnType;
	};

	template<typename MatrixType,typename Rhs>
	struct homogeneous_right_product_impl<Homogeneous<MatrixType,Horizontal>,Rhs>
	: public ReturnByValue<homogeneous_right_product_impl<Homogeneous<MatrixType,Horizontal>,Rhs> >
	{
	typedef typename remove_all<typename Rhs::Nested>::type RhsNested;
	typedef typename MatrixType::Index Index;
	homogeneous_right_product_impl(const MatrixType& lhs, const Rhs& rhs)
	: m_lhs(lhs), m_rhs(rhs)
	{}

	inline Index rows() const { return m_lhs.rows(); }
	inline Index cols() const { return m_rhs.cols(); }

	template<typename Dest> void evalTo(Dest& dst) const
	{
	// FIXME investigate how to allow lazy evaluation of this product when possible
	dst = m_lhs * Block<const RhsNested,
	RhsNested::RowsAtCompileTime==Dynamic?Dynamic:RhsNested::RowsAtCompileTime-1,
	RhsNested::ColsAtCompileTime>
	(m_rhs,0,0,m_rhs.rows()-1,m_rhs.cols());
	dst += m_rhs.row(m_rhs.rows()-1).colwise()
	.template replicate<MatrixType::RowsAtCompileTime>(m_lhs.rows());
	}

	typename MatrixType::Nested m_lhs;
	typename Rhs::Nested m_rhs;
	};

	} // end namespace internal

	} // end namespace Eigen

	#endif // EIGEN_HOMOGENEOUS_H