diff options
author | Benoit Jacob <jacob.benoit.1@gmail.com> | 2007-12-28 16:00:55 +0000 |
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committer | Benoit Jacob <jacob.benoit.1@gmail.com> | 2007-12-28 16:00:55 +0000 |
commit | dfdad129a3c6d5437eb001f5fe6d37de3fc07238 (patch) | |
tree | afbde1562e62b3952c8ce7a6b9c3cdd95fdb69c0 /Eigen/src/Core/Fuzzy.h | |
parent | e7bdbe2e6a7d3d3e3f498e1ba9159b0ec1a8ccae (diff) |
move Core/ to a src/ subdir, in preparation for following changes
Diffstat (limited to 'Eigen/src/Core/Fuzzy.h')
-rw-r--r-- | Eigen/src/Core/Fuzzy.h | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/Eigen/src/Core/Fuzzy.h b/Eigen/src/Core/Fuzzy.h new file mode 100644 index 000000000..bd3219568 --- /dev/null +++ b/Eigen/src/Core/Fuzzy.h @@ -0,0 +1,91 @@ +// This file is part of Eigen, a lightweight C++ template library +// for linear algebra. Eigen itself is part of the KDE project. +// +// Copyright (C) 2006-2007 Benoit Jacob <jacob@math.jussieu.fr> +// +// Eigen is free software; 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 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 General Public License for more +// details. +// +// You should have received a copy of the GNU General Public License along +// with Eigen; if not, write to the Free Software Foundation, Inc., 51 +// Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. +// +// As a special exception, if other files instantiate templates or use macros +// or functions from this file, or you compile this file and link it +// with other works to produce a work based on this file, this file does not +// by itself cause the resulting work to be covered by the GNU General Public +// License. This exception does not invalidate any other reasons why a work +// based on this file might be covered by the GNU General Public License. + +#ifndef EIGEN_FUZZY_H +#define EIGEN_FUZZY_H + +template<typename Scalar, typename Derived> +template<typename OtherDerived> +bool MatrixBase<Scalar, Derived>::isApprox( + const OtherDerived& other, + const typename NumTraits<Scalar>::Real& prec +) const +{ + assert(rows() == other.rows() && cols() == other.cols()); + if(IsVectorAtCompileTime) + { + return((*this - other).norm2() <= std::min(norm2(), other.norm2()) * prec * prec); + } + else + { + for(int i = 0; i < cols(); i++) + if((col(i) - other.col(i)).norm2() + > std::min(col(i).norm2(), other.col(i).norm2()) * prec * prec) + return false; + return true; + } +} + +template<typename Scalar, typename Derived> +bool MatrixBase<Scalar, Derived>::isMuchSmallerThan( + const typename NumTraits<Scalar>::Real& other, + const typename NumTraits<Scalar>::Real& prec +) const +{ + if(IsVectorAtCompileTime) + { + return(norm2() <= abs2(other * prec)); + } + else + { + for(int i = 0; i < cols(); i++) + if(col(i).norm2() > abs2(other * prec)) + return false; + return true; + } +} + +template<typename Scalar, typename Derived> +template<typename OtherDerived> +bool MatrixBase<Scalar, Derived>::isMuchSmallerThan( + const MatrixBase<Scalar, OtherDerived>& other, + const typename NumTraits<Scalar>::Real& prec +) const +{ + assert(rows() == other.rows() && cols() == other.cols()); + if(IsVectorAtCompileTime) + { + return(norm2() <= other.norm2() * prec * prec); + } + else + { + for(int i = 0; i < cols(); i++) + if(col(i).norm2() > other.col(i).norm2() * prec * prec) + return false; + return true; + } +} + +#endif // EIGEN_FUZZY_H |