text: // Copyright (c) 1997-2007  ETH Zurich (Switzerland).
  // 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
  // General Public License as published by the Free Software Foundation,
  // either version 3 of the License, or (at your option) any later version.
  //
  // 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.
  //
  // $URL$
  // $Id$
  // 
  //
  // Author(s)     : Sven Schoenherr
  //                 Bernd Gaertner <gaertner@inf.ethz.ch>
  //                 Franz Wessendorp
  //                 Kaspar Fischer
  
  #ifndef CGAL_QP_SOLVER_UNBOUNDED_DIRECTION_H
  #define CGAL_QP_SOLVER_UNBOUNDED_DIRECTION_H
  
  namespace CGAL {
  template < typename Q, typename ET, typename Tags >
  ET QP_solver<Q, ET, Tags>::unbounded_direction_value(int i) const
  {
   if (is_basic(i)) {                  // basic variable?
     return direction == 1 ? -q_x_O[in_B[i]] : q_x_O[in_B[i]];
   } else {                            // non-basic variable?
     if (i == j)                       // most recent entering variable?
       return direction == 1 ? d : -d;
     return et0;
   }
  }
  } //namespace CGAL
  
  #endif // CGAL_QP_SOLVER_UNBOUNDED_DIRECTION_H
  
  // ===== EOF ==================================================================
  