infinity_or_max.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/Kinetic/internal/infinity_or_max.h $
// $Id: infinity_or_max.h 33416 2006-08-18 21:03:47Z afabri $
// 
//
// Author(s)     : Daniel Russel <[e-mail]>

#ifndef CGAL_KINETIC_INFINITY_OR_MAX_H
#define CGAL_KINETIC_INFINITY_OR_MAX_H

#include <limits>

CGAL_KINETIC_BEGIN_INTERNAL_NAMESPACE
template <class T>
T infinity_or_max()
{
    if (std::numeric_limits<T>::has_infinity) return std::numeric_limits<T>::infinity();
    else return (std::numeric_limits<T>::max)();
}


template <class T>
T infinity_or_max(T)
{
    if (std::numeric_limits<T>::has_infinity) return std::numeric_limits<T>::infinity();
    else return (std::numeric_limits<T>::max)();
}


CGAL_KINETIC_END_INTERNAL_NAMESPACE
#endif