/*

Copyright_License {

  XCSoar Glide Computer - http://www.xcsoar.org/
  Copyright (C) 2000-2013 The XCSoar Project
  A detailed list of copyright holders can be found in the file "AUTHORS".

  This program 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.

  This program 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 this program; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
}
*/

#ifndef TOPOGRAPHY_XSHAPE_POINT_HPP
#define TOPOGRAPHY_XSHAPE_POINT_HPP

#include "Screen/Point.hpp"

typedef int32_t ShapeScalar;
struct ShapePoint {
  /**
   * Type to be used by vector math, where a range of
   * max(ShapeScalar)*max(ShapeScalar) is needed.
   */
  typedef float SquareType;
  ShapeScalar x, y;

  bool operator==(const ShapePoint &other) const {
    return x == other.x && y == other.y;
  }

  bool operator!=(const ShapePoint &other) const {
    return !(*this == other);
  }
};

static inline unsigned
manhattan_distance(ShapePoint a, ShapePoint b)
{
  return abs(a.x - b.x) + abs(a.y - b.y);
}

#endif
