polygon_2d.h

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// -*-c++-*-

 
/*
 *Copyright:
 
 Copyright (C) Hiroki Shimora, Hidehisa Akiyama
 
 This code is free software; you can redistribute it and/or
 modify it under the terms of the GNU Lesser General Public
 License as published by the Free Software Foundation; either
 version 3 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
 Lesser General Public License for more details.
 
 You should have received a copy of the GNU Lesser General Public
 License along with this library; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
 *EndCopyright:
 */
 
#ifndef RCSC_GEOM_POLYGON2D_H
#define RCSC_GEOM_POLYGON2D_H
 
#include <geom/region_2d.h>
 
#include <vector>
 
namespace rcsc {
 
class Vector2D;
class Rect2D;

class Polygon2D
    : public Region2D {
private:
    std::vector< Vector2D > M_vertices;
 
public:
    Polygon2D();

    Polygon2D( const std::vector< Vector2D > & v );

    void clear();

    const Polygon2D & assign( const std::vector< Vector2D > & v );

    void addVertex( const Vector2D & p )
      {
          M_vertices.push_back( p );
      }

    const std::vector< Vector2D > & vertices() const
      {
          return M_vertices;
      }

    virtual
    bool contains( const Vector2D & p ) const
      {
          return contains( p, true );
      }

    bool contains( const Vector2D & p,
                   const bool allow_on_segment ) const;

    Rect2D getBoundingBox() const;

    Vector2D xyCenter() const;

    double dist( const Vector2D & p,
                 const bool check_as_plane = true ) const;

    virtual
    double area() const;

    double doubleSignedArea() const;

    bool isCounterclockwise() const;

    bool isClockwise() const;

    Polygon2D getScissoredConnectedPolygon( const Rect2D & r ) const;
};
 
}
 
#endif