devtools/eigen
1
0
Fork 0
mirror of https://gitlab.com/libeigen/eigen.git synced 2026-04-10 11:34:33 +08:00
Code Issues Packages Projects Releases Wiki Activity

simplifications in the ei_solve_impl system, factor out some boilerplate code

Browse Source
This commit is contained in:
Benoit Jacob
2009-11-08 16:51:41 -05:00
parent ba7bfe110c
commit e4e58e8337
16 changed files with 189 additions and 175 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
Eigen/src/SVD/SVD.h
View File

@@ -428,33 +428,31 @@ SVD<MatrixType>& SVD<MatrixType>::compute(const MatrixType& matrix)
return *this;
}
template<typename MatrixType, typename Rhs, typename Dest>
struct ei_solve_impl<SVD<MatrixType>, Rhs, Dest>
: ei_solve_return_value<SVD<MatrixType>, Rhs>
template<typename _MatrixType, typename Rhs>
struct ei_solve_impl<SVD<_MatrixType>, Rhs>
: ei_solve_return_value<SVD<_MatrixType>, Rhs>
{
void evalTo(Dest& dst) const
EIGEN_MAKE_SOLVE_HELPERS(SVD<_MatrixType>,Rhs)
template<typename Dest> void evalTo(Dest& dst) const
{
typedef typename MatrixType::Scalar Scalar;
typedef typename MatrixType::RealScalar RealScalar;
const int cols = this->cols();
const SVD<MatrixType>& svd = this->m_dec;
const Rhs& rhs = this->m_rhs;
ei_assert(rhs.rows() == svd.rows());
ei_assert(rhs().rows() == dec().rows());
for (int j=0; j<cols; ++j)
{
Matrix<Scalar,MatrixType::RowsAtCompileTime,1> aux = svd.matrixU().adjoint() * rhs.col(j);
Matrix<Scalar,MatrixType::RowsAtCompileTime,1> aux = dec().matrixU().adjoint() * rhs().col(j);
for (int i = 0; i <svd.rows(); ++i)
for (int i = 0; i <dec().rows(); ++i)
{
Scalar si = svd.singularValues().coeff(i);
Scalar si = dec().singularValues().coeff(i);
if(si == RealScalar(0))
aux.coeffRef(i) = Scalar(0);
else
aux.coeffRef(i) /= si;
}
dst.col(j) = svd.matrixV() * aux;
dst.col(j) = dec().matrixV() * aux;
}
}
};