geometry.h

#ifndef _GEOMETRY_H
#define _GEOMETRY_H


/*

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.

    This library 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
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public License
    along with this library; see the file COPYING.LIB.  If not, write to
    the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.

    file    : geometry.h
 
*/


#include <math.h>


class Vertex;



namespace geometry
{

  typedef struct {
    double x;
    double y;
  } point;
      


  typedef struct {
    point p1;
    point p2;
  } line;
  


  double distance(const point& p1, const point& p2);




  double distance(const line& l, const point& p);




  double area(Vertex* p1, Vertex* p2, Vertex* p3);




  bool intersect(const line& l1, const line& l2);

 

};


#endif

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