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/***************************************************************************
* Copyright (C) 2005-2008 by the FIFE team *
* http://www.fifengine.de *
* This file is part of FIFE. *
* *
* FIFE 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 2.1 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., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA *
***************************************************************************/
#ifndef FIFE_ANGLES_H
#define FIFE_ANGLES_H
// Standard C++ library includes
#include <map>
// 3rd party library includes
// FIFE includes
// These includes are split up in two parts, separated by one empty line
// First block: files included from the FIFE root src directory
// Second block: files included from the same folder
#include "model/structures/location.h"
namespace FIFE {
typedef std::map<uint32_t, int32_t> type_angle2id;
/** Returns id for given angle from angle2id map
* in case there are no elements in the map, negative value is returned
*/
int32_t getIndexByAngle(int32_t angle, const type_angle2id& angle2id, int32_t& closestMatchingAngle);
/** Gets angle of vector defined by given locations
* @return angle in polar coordinates between the line
* defined by the two locations and the horizontal axis (East <-> West)
*/
inline int32_t getAngleBetween(const Location& loc1, const Location& loc2) {
ExactModelCoordinate c1 = loc1.getMapCoordinates();
ExactModelCoordinate c2 = loc2.getMapCoordinates();
double dy = (c2.y - c1.y);
double dx = (c2.x - c1.x);
int32_t angle = static_cast<int32_t>(Mathd::ATan2(-dy,dx)*(180.0/Mathd::pi()));
return angle;
}
}
#endif
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