/* 
 * 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.NyARPerspectiveProjectionMatrix;
import jp.nyatla.nyartoolkit.core.transmat.NyARTransMatResult;
import jp.nyatla.nyartoolkit.core.types.*;
import jp.nyatla.nyartoolkit.core.types.matrix.NyARDoubleMatrix33;
/**
 * 回転行列計算用の、3x3行列
 *
 */
public class NyARRotMatrix extends NyARDoubleMatrix33
{
	/**
	 * インスタンスを準備します。
	 * 
	 * @param i_param
	 */
	public NyARRotMatrix(NyARPerspectiveProjectionMatrix i_matrix) throws NyARException
	{
		this.__initRot_vec1=new NyARRotVector(i_matrix);
		this.__initRot_vec2=new NyARRotVector(i_matrix);
		return;
	}
	final private NyARRotVector __initRot_vec1;
	final private NyARRotVector __initRot_vec2;
	/**
	 * NyARTransMatResultの内容からNyARRotMatrixを復元します。
	 * @param i_prev_result
	 */
	public final void initRotByPrevResult(NyARTransMatResult i_prev_result)
	{

		this.m00=i_prev_result.m00;
		this.m01=i_prev_result.m01;
		this.m02=i_prev_result.m02;

		this.m10=i_prev_result.m10;
		this.m11=i_prev_result.m11;
		this.m12=i_prev_result.m12;

		this.m20=i_prev_result.m20;
		this.m21=i_prev_result.m21;
		this.m22=i_prev_result.m22;
		return;
	}	
	/**
	 * 
	 * @param i_linear
	 * @param i_sqvertex
	 * @throws NyARException
	 */
	public void initRotBySquare(final NyARLinear[] i_linear,final NyARDoublePoint2d[] i_sqvertex) throws NyARException
	{
		final NyARRotVector vec1=this.__initRot_vec1;
		final NyARRotVector vec2=this.__initRot_vec2;

		//向かい合った辺から、２本のベクトルを計算
		
		//軸１
		vec1.exteriorProductFromLinear(i_linear[0], i_linear[2]);
		vec1.checkVectorByVertex(i_sqvertex[0], i_sqvertex[1]);

		//軸２
		vec2.exteriorProductFromLinear(i_linear[1], i_linear[3]);
		vec2.checkVectorByVertex(i_sqvertex[3], i_sqvertex[0]);

		//回転の最適化？
		NyARRotVector.checkRotation(vec1,vec2);

		this.m00 =vec1.v1;
		this.m10 =vec1.v2;
		this.m20 =vec1.v3;
		this.m01 =vec2.v1;
		this.m11 =vec2.v2;
		this.m21 =vec2.v3;
		
		//最後の軸を計算
		final double w02 = vec1.v2 * vec2.v3 - vec1.v3 * vec2.v2;
		final double w12 = vec1.v3 * vec2.v1 - vec1.v1 * vec2.v3;
		final double w22 = vec1.v1 * vec2.v2 - vec1.v2 * vec2.v1;
		final double w = Math.sqrt(w02 * w02 + w12 * w12 + w22 * w22);
		this.m02 = w02/w;
		this.m12 = w12/w;
		this.m22 = w22/w;
		return;
	}
	/**
	 * i_in_pointを変換行列で座標変換する。
	 * @param i_in_point
	 * @param i_out_point
	 */
	public final void getPoint3d(final NyARDoublePoint3d i_in_point,final NyARDoublePoint3d i_out_point)
	{
		final double x=i_in_point.x;
		final double y=i_in_point.y;
		final double z=i_in_point.z;
		i_out_point.x=this.m00 * x + this.m01 * y + this.m02 * z;
		i_out_point.y=this.m10 * x + this.m11 * y + this.m12 * z;
		i_out_point.z=this.m20 * x + this.m21 * y + this.m22 * z;
		return;
	}
	/**
	 * 複数の頂点を一括して変換する
	 * @param i_in_point
	 * @param i_out_point
	 * @param i_number_of_vertex
	 */
	public final void getPoint3dBatch(final NyARDoublePoint3d[] i_in_point,NyARDoublePoint3d[] i_out_point,int i_number_of_vertex)
	{
		for(int i=i_number_of_vertex-1;i>=0;i--){
			final NyARDoublePoint3d out_ptr=i_out_point[i];
			final NyARDoublePoint3d in_ptr=i_in_point[i];
			final double x=in_ptr.x;
			final double y=in_ptr.y;
			final double z=in_ptr.z;
			out_ptr.x=this.m00 * x + this.m01 * y + this.m02 * z;
			out_ptr.y=this.m10 * x + this.m11 * y + this.m12 * z;
			out_ptr.z=this.m20 * x + this.m21 * y + this.m22 * z;
		}
		return;
	}
}
