// Copyright (c) 2005  Tel-Aviv University (Israel).
// All rights reserved.
//
// This file is part of CGAL (www.cgal.org).
//
// $URL: https://github.com/CGAL/cgal/blob/v5.1/Envelope_3/include/CGAL/Envelope_3/Envelope_base.h $
// $Id: Envelope_base.h 254d60f 2019-10-19T15:23:19+02:00 Sébastien Loriot
// SPDX-License-Identifier: GPL-3.0-or-later OR LicenseRef-Commercial
//
// Author(s)     : Michal Meyerovitch     <gorgymic@post.tau.ac.il>
//                 Baruch Zukerman        <baruchzu@post.tau.ac.il>
//                 Efi Fogel              <efif@post.tau.ac.il>

#ifndef CGAL_ENVELOPE_BASE_H
#define CGAL_ENVELOPE_BASE_H

#include <CGAL/license/Envelope_3.h>


namespace CGAL {

// Envelope types:
enum Envelope_type {
  ENVELOPE_LOWER = 1,
  ENVELOPE_UPPER = 2
};

// Types of intersection curve between 2 xy-monotone surfaces:
enum Intersection_type {
  INTERSECTION_UNKNOWN = 0,
  INTERSECTION_TRANSVERSAL = 1,
  INTERSECTION_TANGENT = 2
};

// Decision mark for DCEL features:
enum Dac_decision
{
  DAC_DECISION_FIRST = -1,
  DAC_DECISION_BOTH,
  DAC_DECISION_SECOND,
  DAC_DECISION_NOT_SET
};

} //namespace CGAL

#endif // CGAL_ENVELOPE_BASE_3_H