Direction.h

/*
 * Gamedev Framework (gf)
 * Copyright (C) 2016-2017 Julien Bernard
 *
 * This software is provided 'as-is', without any express or implied
 * warranty.  In no event will the authors be held liable for any damages
 * arising from the use of this software.
 *
 * Permission is granted to anyone to use this software for any purpose,
 * including commercial applications, and to alter it and redistribute it
 * freely, subject to the following restrictions:
 *
 * 1. The origin of this software must not be misrepresented; you must not
 *    claim that you wrote the original software. If you use this software
 *    in a product, an acknowledgment in the product documentation would be
 *    appreciated but is not required.
 * 2. Altered source versions must be plainly marked as such, and must not be
 *    misrepresented as being the original software.
 * 3. This notice may not be removed or altered from any source distribution.
 */
#ifndef GF_DIRECTION_H
#define GF_DIRECTION_H

#include "Portability.h"
#include "Vector.h"

namespace gf {
#ifndef DOXYGEN_SHOULD_SKIP_THIS
inline namespace v1 {
#endif

  enum class Direction : int {
    Center  = -1, 
    Up      =  0, 
    Right   =  1, 
    Down    =  2, 
    Left    =  3, 
  };

  GF_API Vector2f unit(Direction direction);

  GF_API Vector2i displacement(Direction direction);

  GF_API float angle(Direction direction);

  GF_API Direction opposite(Direction direction);

  GF_API Direction orthogonalCW(Direction direction);

  GF_API Direction orthogonalCCW(Direction direction);

  GF_API Direction nextCW(Direction direction);

  GF_API Direction nextCCW(Direction direction);

#ifndef DOXYGEN_SHOULD_SKIP_THIS
}
#endif
}

#endif // GF_DIRECTION_H