diff options
Diffstat (limited to 'Eigen/src/Core/Fuzzy.h')
-rw-r--r-- | Eigen/src/Core/Fuzzy.h | 100 |
1 files changed, 63 insertions, 37 deletions
diff --git a/Eigen/src/Core/Fuzzy.h b/Eigen/src/Core/Fuzzy.h index 8438193d8..22e267c8e 100644 --- a/Eigen/src/Core/Fuzzy.h +++ b/Eigen/src/Core/Fuzzy.h @@ -2,15 +2,16 @@ // for linear algebra. Eigen itself is part of the KDE project. // // Copyright (C) 2006-2008 Benoit Jacob <jacob@math.jussieu.fr> +// Copyright (C) 2008 Gael Guennebaud <g.gael@free.fr> // // 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 +// 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 +// 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 @@ -18,13 +19,16 @@ // 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 +// 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_FUZZY_H #define EIGEN_FUZZY_H +template<typename Derived, typename OtherDerived=Derived, bool IsVector=Derived::IsVectorAtCompileTime> +struct ei_fuzzy_selector; + /** \returns \c true if \c *this is approximately equal to \a other, within the precision * determined by \a prec. * @@ -48,21 +52,7 @@ bool MatrixBase<Derived>::isApprox( typename NumTraits<Scalar>::Real prec ) const { - ei_assert(rows() == other.rows() && cols() == other.cols()); - if(IsVectorAtCompileTime) - { - return((*this - other).norm2() <= std::min(norm2(), other.norm2()) * prec * prec); - } - else - { - typename Derived::Nested nested(derived()); - typename OtherDerived::Nested otherNested(other.derived()); - for(int i = 0; i < cols(); i++) - if((nested.col(i) - otherNested.col(i)).norm2() - > std::min(nested.col(i).norm2(), otherNested.col(i).norm2()) * prec * prec) - return false; - return true; - } + return ei_fuzzy_selector<Derived,OtherDerived>::isApprox(derived(), other.derived(), prec); } /** \returns \c true if the norm of \c *this is much smaller than \a other, @@ -81,18 +71,7 @@ bool MatrixBase<Derived>::isMuchSmallerThan( typename NumTraits<Scalar>::Real prec ) const { - if(IsVectorAtCompileTime) - { - return(norm2() <= ei_abs2(other * prec)); - } - else - { - typename Derived::Nested nested(*this); - for(int i = 0; i < cols(); i++) - if(nested.col(i).norm2() > ei_abs2(other * prec)) - return false; - return true; - } + return ei_fuzzy_selector<Derived>::isMuchSmallerThan(derived(), other, prec); } /** \returns \c true if the norm of \c *this is much smaller than the norm of \a other, @@ -112,20 +91,67 @@ bool MatrixBase<Derived>::isMuchSmallerThan( typename NumTraits<Scalar>::Real prec ) const { - ei_assert(rows() == other.rows() && cols() == other.cols()); - if(IsVectorAtCompileTime) + return ei_fuzzy_selector<Derived,OtherDerived>::isMuchSmallerThan(derived(), other.derived(), prec); +} + + +template<typename Derived, typename OtherDerived> +struct ei_fuzzy_selector<Derived,OtherDerived,true> +{ + typedef typename Derived::RealScalar RealScalar; + static bool isApprox(const Derived& self, const OtherDerived& other, RealScalar prec) { - return(norm2() <= other.norm2() * prec * prec); + EIGEN_STATIC_ASSERT_SAME_VECTOR_SIZE(Derived,OtherDerived); + ei_assert(self.size() == other.size()); + return((self - other).norm2() <= std::min(self.norm2(), other.norm2()) * prec * prec); } - else + static bool isMuchSmallerThan(const Derived& self, const RealScalar& other, RealScalar prec) { - typename Derived::Nested nested(*this); + return(self.norm2() <= ei_abs2(other * prec)); + } + static bool isMuchSmallerThan(const Derived& self, const OtherDerived& other, RealScalar prec) + { + EIGEN_STATIC_ASSERT_SAME_VECTOR_SIZE(Derived,OtherDerived); + ei_assert(self.size() == other.size()); + return(self.norm2() <= other.norm2() * prec * prec); + } +}; + +template<typename Derived, typename OtherDerived> +struct ei_fuzzy_selector<Derived,OtherDerived,false> +{ + typedef typename Derived::RealScalar RealScalar; + static bool isApprox(const Derived& self, const OtherDerived& other, RealScalar prec) + { + EIGEN_STATIC_ASSERT_SAME_MATRIX_SIZE(Derived,OtherDerived); + ei_assert(self.rows() == other.rows() && self.cols() == other.cols()); + typename Derived::Nested nested(self); + typename OtherDerived::Nested otherNested(other); + for(int i = 0; i < self.cols(); i++) + if((nested.col(i) - otherNested.col(i)).norm2() + > std::min(nested.col(i).norm2(), otherNested.col(i).norm2()) * prec * prec) + return false; + return true; + } + static bool isMuchSmallerThan(const Derived& self, const RealScalar& other, RealScalar prec) + { + typename Derived::Nested nested(self); + for(int i = 0; i < self.cols(); i++) + if(nested.col(i).norm2() > ei_abs2(other * prec)) + return false; + return true; + } + static bool isMuchSmallerThan(const Derived& self, const OtherDerived& other, RealScalar prec) + { + EIGEN_STATIC_ASSERT_SAME_MATRIX_SIZE(Derived,OtherDerived); + ei_assert(self.rows() == other.rows() && self.cols() == other.cols()); + typename Derived::Nested nested(self); typename OtherDerived::Nested otherNested(other); - for(int i = 0; i < cols(); i++) + for(int i = 0; i < self.cols(); i++) if(nested.col(i).norm2() > otherNested.col(i).norm2() * prec * prec) return false; return true; } -} +}; #endif // EIGEN_FUZZY_H |