turn_reverser.h

很多二维 三维几何计算算法 C++ 类库

// Copyright (c) 2000  Max-Planck-Institute Saarbruecken (Germany).
// All rights reserved.
//
// This file is part of CGAL (www.cgal.org); you may redistribute it under
// the terms of the Q Public License version 1.0.
// See the file LICENSE.QPL 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/Partition_2/include/CGAL/Partition_2/Turn_reverser.h $
// $Id: Turn_reverser.h 31311 2006-05-29 08:30:22Z wein $
// 
//
// Author(s)     : Susan Hert <[e-mail]>

#ifndef   CGAL_TURN_REVERSER_H
#define   CGAL_TURN_REVERSER_H

namespace CGAL {

template <class Point_2, class TurnPredicate>
class Turn_reverser 
{
public:
   Turn_reverser() {}
   Turn_reverser( const TurnPredicate& t ): turn(t) {}

   bool operator() (const Point_2& p1, 
                    const Point_2& p2, 
                    const Point_2& p3) const
   {   return turn(p2, p1, p3); }

private:
   TurnPredicate turn;
};


}

#endif // CGAL_TURN_REVERSER_H