/* 
 *  plane.h -- ePiX::Plane class
 *
 * This file is part of ePiX, a C++ library for creating high-quality 
 * figures in LaTeX 
 *
 * Version 1.1.17
 * Last Change: September 13, 2007
 */

/* 
 * Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007
 * Andrew D. Hwang <rot 13 nujnat at zngupf dot ubylpebff dot rqh>
 * Department of Mathematics and Computer Science
 * College of the Holy Cross
 * Worcester, MA, 01610-2395, USA
 */

/*
 * ePiX is free software; 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 2 of the License, or
 * (at your option) any later version.
 *
 * ePiX is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
 * License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with ePiX; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#ifndef EPIX_PLANE
#define EPIX_PLANE

#include "triples.h"

namespace ePiX {

  class Circle;
  class Plane;
  class Segment;
  class Sphere;

  class Plane {
  public:
    Plane(const P& pt=P(0,0,0), const P& perp=E_3);
    Plane(const P&, const P&, const P&);

    P pt() const;
    P perp() const;
    bool malformed() const;

    // affine operations
    Plane& shift(const P&);
    Plane& move_to(const P&);

    void draw() const;

  private:
    P m_pt;
    P m_perp; // unit normal

    bool m_malformed;
  }; // end of Plane class

  void plane(const P& pt=P(0,0,0), const P& perp=E_3);
  void plane(const P&, const P&, const P&);

} // end of namespace

#endif /* EPIX_PLANE */
