scummvm/graphics/matrix3.h

/* Residual - Virtual machine to run LucasArts' 3D adventure games
 *
 * Residual is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the AUTHORS
 * file distributed with this source distribution.
 *
 * This library 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
 *
 * $URL$
 * $Id$
 *
 */

#ifndef ENGINE_MATRIX3_H
#define ENGINE_MATRIX3_H

#include "graphics/vector3d.h"

namespace Graphics {

// matrix 3 is a rotation matrix
class Matrix3 {
public:
	Vector3d _right;
	Vector3d _up;
	Vector3d _at;

	void buildFromPitchYawRoll(float pitch, float yaw, float roll);
	void setAsIdentity();

	void constructAroundPitch(float pitch);
	void constructAroundYaw(float pitch);
	void constructAroundRoll(float pitch);

	void getPitchYawRoll(float* pPitch, float* pYaw, float* pRoll);

	float getPitch();
	float getYaw();
	float getRoll();

	void transform(Vector3d* v);

	// operators
	Matrix3& operator *=(const Matrix3& s) {
		float x, y, z;

		x = _right.dotProduct(s._right.x(), s._up.x(), s._at.x());
		y = _right.dotProduct(s._right.y(), s._up.y(), s._at.y());
		z = _right.dotProduct(s._right.z(), s._up.z(), s._at.z());

		_right.set(x, y, z);

		x = _up.dotProduct(s._right.x(), s._up.x(), s._at.x());
		y = _up.dotProduct(s._right.y(), s._up.y(), s._at.y());
		z = _up.dotProduct(s._right.z(), s._up.z(), s._at.z());

		_up.set( x, y, z );

		x = _at.dotProduct(s._right.x(), s._up.x(), s._at.x());
		y = _at.dotProduct(s._right.y(), s._up.y(), s._at.y());
		z = _at.dotProduct(s._right.z(), s._up.z(), s._at.z());

		_at.set(x, y, z);

		return *this;
	}
	Matrix3& operator =(const Matrix3& s) {
		_right = s._right;
		_up = s._up;
		_at = s._at;

		return *this;
	}

private:
};

} // end of namespace Graphics

#endif