filtered_descartes_has_root.h

很多二维 三维几何计算算法 C++ 类库

// Copyright (c) 2005  Stanford University (USA).
// All rights reserved.
//
// This file is part of CGAL (www.cgal.org); 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; version 2.1 of the License.
// See the file LICENSE.LGPL distributed with CGAL.
//
// Licensees holding a valid commercial license may use this file in
// accordance with the commercial license agreement provided with the software.
//
// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
//
// $URL: svn+ssh://scm.gforge.inria.fr/svn/cgal/branches/CGAL-3.3-branch/Kinetic_data_structures/include/CGAL/Polynomial/internal/Filtered_kernel/Filtered_Descartes_has_root.h $
// $Id: Filtered_Descartes_has_root.h 28567 2006-02-16 14:30:13Z lsaboret $
// 
//
// Author(s)     : Daniel Russel <[e-mail]>

#ifndef CGAL_POLYNOMIAL_FILTERED_DESCARTES_HAS_ROOT_H
#define CGAL_POLYNOMIAL_FILTERED_DESCARTES_HAS_ROOT_H
#include <CGAL/Polynomial/basic.h>
#include <CGAL/Polynomial/Filtered_kernel/Filtered_Descartes_root_counter.h>

CGAL_POLYNOMIAL_BEGIN_INTERNAL_NAMESPACE;

template <class Kernel>
class Filtered_Descartes_has_root
{
    public:
        Filtered_Descartes_has_root(){}

        Filtered_Descartes_has_root(const typename Kernel::Function &fh, Kernel k= Kernel()): h_(fh), kernel_(k) {
        }

        ~Filtered_Descartes_has_root() {
        }

        typedef bool result_type;

        template <class NTT>
            result_type operator()(const NTT &begin, const NTT &end,
            POLYNOMIAL_NS::Sign=POLYNOMIAL_NS::ZERO,
            POLYNOMIAL_NS::Sign=POLYNOMIAL_NS::ZERO) const
        {
            return filtered_Descartes_root_counter(h_, begin, end, false, kernel_)!= 0;
        }

    protected:
        typename Kernel::Function h_;
        Kernel kernel_;
};

CGAL_POLYNOMIAL_END_INTERNAL_NAMESPACE;
#endif