envelope_base.h

很多二维 三维几何计算算法 C++ 类库

// Copyright (c) 2005  Tel-Aviv University (Israel).
// 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/Envelope_3/include/CGAL/Envelope_3/Envelope_base.h $
// $Id: Envelope_base.h 37895 2007-04-03 18:32:55Z efif $
//
// Author(s)     : Michal Meyerovitch     <[e-mail]>
//                 Baruch Zukerman        <[e-mail]>

#ifndef CGAL_ENVELOPE_BASE_H
#define CGAL_ENVELOPE_BASE_H

CGAL_BEGIN_NAMESPACE

// Envelope types:
typedef unsigned int   Envelope_type;

const Envelope_type      LOWER = 1;
const Envelope_type      UPPER = 2;

// Types of intersection curve between 2 xy-monotone surfaces:
typedef unsigned int   Intersection_type;

const Intersection_type  UNKNOWN = 0;
const Intersection_type  TRANSVERSAL = 1;
const Intersection_type  TANGENT = 2;

// Decision mark for DCEL features:
enum Dac_decision
{
  FIRST = -1,
  BOTH,
  SECOND,
  NOT_SET
};

CGAL_END_NAMESPACE

#endif // CGAL_ENVELOPE_BASE_3_H