/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 */

#ifndef TITANIC_DVECTOR_H
#define TITANIC_DVECTOR_H

#include "titanic/star_control/fvector.h"

namespace Titanic {

class DMatrix;

/**
 * Double based vector class.
 * @remarks		TODO: See if it can be merged with FVector
 */
class DVector {
public:
	double _x, _y, _z;
public:
	DVector() : _x(0), _y(0), _z(0) {}
	DVector(double x, double y, double z) : _x(x), _y(y), _z(z) {}
	DVector(const FVector &v) : _x(v._x), _y(v._y), _z(v._z) {}

	double normalize();

	/**
	 * Returns the distance between this vector and the passed one
	 */
	double getDistance(const DVector &src);

	DVector *fn1(DVector &dest, const DMatrix &m);
	void fn2(double val);
	DVector fn3() const;
	void fn4(const DVector &v, DMatrix &m);
	DMatrix fn5() const;

	/**
	 * Returns true if the passed vector equals this one
	 */
	bool operator==(const DVector &src) const {
		return _x == src._x && _y == src._y && _z == src._z;
	}

	/**
	 * Returns true if the passed vector does not equal this one
	 */
	bool operator!=(const DVector &src) const {
		return _x != src._x || _y != src._y || _z != src._z;
	}

	DVector operator+(const DVector &delta) const {
		return DVector(_x + delta._x, _y + delta._y, _z + delta._z);
	}

	DVector operator-(const DVector &delta) const {
		return DVector(_x - delta._x, _y - delta._y, _z - delta._z);
	}

	void operator+=(const DVector &delta) {
		_x += delta._x;
		_y += delta._y;
		_z += delta._z;
	}

	void operator-=(const DVector &delta) {
		_x -= delta._x;
		_y -= delta._y;
		_z -= delta._z;
	}
};

} // End of namespace Titanic

#endif /* TITANIC_DVECTOR_H */