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92 lines
2.8 KiB
C++
92 lines
2.8 KiB
C++
// This file is part of Eigen, a lightweight C++ template library
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// for linear algebra. Eigen itself is part of the KDE project.
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//
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// Copyright (C) 2006-2007 Benoit Jacob <jacob@math.jussieu.fr>
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//
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// Eigen is free software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the Free Software
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// Foundation; either version 2 or (at your option) any later version.
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//
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// Eigen is distributed in the hope that it will be useful, but WITHOUT ANY
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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// FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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// details.
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//
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// You should have received a copy of the GNU General Public License along
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// with Eigen; if not, write to the Free Software Foundation, Inc., 51
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// Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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//
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// As a special exception, if other files instantiate templates or use macros
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// or functions from this file, or you compile this file and link it
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// with other works to produce a work based on this file, this file does not
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// by itself cause the resulting work to be covered by the GNU General Public
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// License. This exception does not invalidate any other reasons why a work
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// based on this file might be covered by the GNU General Public License.
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#ifndef EIGEN_FUZZY_H
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#define EIGEN_FUZZY_H
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template<typename Scalar, typename Derived>
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template<typename OtherDerived>
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bool MatrixBase<Scalar, Derived>::isApprox(
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const OtherDerived& other,
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const typename NumTraits<Scalar>::Real& prec
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) const
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{
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assert(rows() == other.rows() && cols() == other.cols());
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if(IsVector)
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{
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return((*this - other).norm2() <= std::min(norm2(), other.norm2()) * prec * prec);
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}
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else
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{
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for(int i = 0; i < cols(); i++)
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if((col(i) - other.col(i)).norm2()
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> std::min(col(i).norm2(), other.col(i).norm2()) * prec * prec)
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return false;
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return true;
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}
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}
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template<typename Scalar, typename Derived>
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bool MatrixBase<Scalar, Derived>::isMuchSmallerThan(
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const typename NumTraits<Scalar>::Real& other,
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const typename NumTraits<Scalar>::Real& prec
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) const
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{
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if(IsVector)
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{
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return(norm2() <= abs2(other * prec));
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}
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else
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{
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for(int i = 0; i < cols(); i++)
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if(col(i).norm2() > abs2(other * prec))
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return false;
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return true;
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}
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}
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template<typename Scalar, typename Derived>
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template<typename OtherDerived>
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bool MatrixBase<Scalar, Derived>::isMuchSmallerThan(
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const MatrixBase<Scalar, OtherDerived>& other,
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const typename NumTraits<Scalar>::Real& prec
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) const
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{
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assert(rows() == other.rows() && cols() == other.cols());
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if(IsVector)
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{
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return(norm2() <= other.norm2() * prec * prec);
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}
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else
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{
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for(int i = 0; i < cols(); i++)
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if(col(i).norm2() > other.col(i).norm2() * prec * prec)
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return false;
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return true;
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}
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}
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#endif // EIGEN_FUZZY_H
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