/* 
 * PROJECT: NyARToolkit
 * --------------------------------------------------------------------------------
 * This work is based on the original ARToolKit developed by
 *   Hirokazu Kato
 *   Mark Billinghurst
 *   HITLab, University of Washington, Seattle
 * http://www.hitl.washington.edu/artoolkit/
 *
 * The NyARToolkit is Java edition ARToolKit class library.
 * Copyright (C)2008-2009 Ryo Iizuka
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 * 
 * For further information please contact.
 *	http://nyatla.jp/nyatoolkit/
 *	<airmail(at)ebony.plala.or.jp> or <nyatla(at)nyatla.jp>
 * 
 */
package jp.nyatla.nyartoolkit.core.transmat.rotmatrix;

import jp.nyatla.nyartoolkit.NyARException;
import jp.nyatla.nyartoolkit.core.param.*;
/**
 * 回転行列計算用の、3x3行列
 * 計算方法はARToolKitと同じだが、ARToolKitにある不要な行列から角度を逆算する
 * 処理を省略しているため、下位12桁目の計算値が異なる。
 *
 */
public class NyARRotMatrix_ARToolKit_O2 extends NyARRotMatrix_ARToolKit
{	
	/**
	 * インスタンスを準備します。
	 * 
	 * @param i_param
	 */
	public NyARRotMatrix_ARToolKit_O2(NyARPerspectiveProjectionMatrix i_matrix) throws NyARException
	{
		super(i_matrix);
		return;
	}
	public final void setAngle(final double i_x, final double i_y, final double i_z)
	{
		final double sina = Math.sin(i_x);
		final double cosa = Math.cos(i_x);
		final double sinb = Math.sin(i_y);
		final double cosb = Math.cos(i_y);
		final double sinc = Math.sin(i_z);
		final double cosc = Math.cos(i_z);
		// Optimize
		final double CACA = cosa * cosa;
		final double SASA = sina * sina;
		final double SACA = sina * cosa;
		final double SASB = sina * sinb;
		final double CASB = cosa * sinb;
		final double SACACB = SACA * cosb;

		this.m00 = CACA * cosb * cosc + SASA * cosc + SACACB * sinc - SACA * sinc;
		this.m01 = -CACA * cosb * sinc - SASA * sinc + SACACB * cosc - SACA * cosc;
		this.m02 = CASB;
		this.m10 = SACACB * cosc - SACA * cosc + SASA * cosb * sinc + CACA * sinc;
		this.m11 = -SACACB * sinc + SACA * sinc + SASA * cosb * cosc + CACA * cosc;
		this.m12 = SASB;
		this.m20 = -CASB * cosc - SASB * sinc;
		this.m21 = CASB * sinc - SASB * cosc;
		this.m22 = cosb;
		//angleを逆計算せずに直接代入
		this._angle.x=i_x;
		this._angle.y=i_y;
		this._angle.z=i_z;
		return;
	}
	
}
