//  $Id$
// 
//  Windstille - A Jump'n Shoot Game
//  Copyright (C) 2005 Matthias Braun <matze@braunis.de>
//
//  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 __VECTOR3_HPP__
#define __VECTOR3_HPP__

#include "math/matrix.hpp"

/**
 * A 3-dimensional vector
 */
class Vector3
{
public:
  float x;
  float y;
  float z;

  Vector3()
    : x(0), y(0), z(0)
  {}

  Vector3(float x, float y, float z)
    : x(x), y(y), z(z)
  {}

  bool operator== (const Vector3& o) const
  {
    return x == o.x && y == o.y && z == o.z;
  }

  bool operator !=(const Vector3& o) const
  {
    return x != o.x || y != o.y || z != o.z;
  }

  Vector3 operator- () const
  {
    return Vector3(-x, -y, -z);
  }

  Vector3 operator+ (const Vector3& o) const
  {
    return Vector3( x+o.x, y+o.y, z+o.z );
  }

  Vector3 operator- (const Vector3& o) const
  {
    return Vector3( x-o.x, y-o.y, z-o.z );
  }

  Vector3 operator* (float s) const
  {
    return Vector3(x * s, y * s, z * s);
  }

  const Vector3& operator+= (const Vector3& o)
  {
    x += o.x;
    y += o.y;
    z += o.z;
    return *this;
  }

  const Vector3& operator-= (const Vector3& o)
  {
    x -= o.x;
    y -= o.y;
    z -= o.z;
    return *this;
  }

  const Vector3& operator*= (const Vector3& o)
  {
    x *= o.x;
    y *= o.y;
    z *= o.z;
    return *this;
  }

  Matrix to_matrix() const
  {
    Matrix result = Matrix::identity();
    result.matrix[12] = x;
    result.matrix[13] = y;
    result.matrix[14] = z;
    return result;
  }
};

#endif