/* 
 * 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 NyARToolkitCS is C# 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>
 * 
 */
using System;
using jp.nyatla.nyartoolkit.cs.utils;

namespace jp.nyatla.nyartoolkit.cs.sandbox.x2
{

    /**
     * ARMat構造体に対応するクラス typedef struct { double *m; int row; int clm; }ARMat;
     * 
     */
    public class NyARFixedFloat16Mat
    {
        /**
         * 配列サイズと行列サイズは必ずしも一致しないことに注意 返された配列のサイズを行列の大きさとして使わないこと！
         * 
         */
        protected long[][] m;
        private int clm, row;

        /**
         * デフォルトコンストラクタは機能しません。
         * 
         * @throws NyARException
         */
        protected NyARFixedFloat16Mat()
        {
            throw new NyARException();
        }

        public NyARFixedFloat16Mat(int i_row, int i_clm)
        {
            this.m = ArrayUtils.newLong2dArray(i_row, i_clm);
            clm = i_clm;
            row = i_row;
            return;
        }
        public int getClm()
        {
            return clm;
        }
        public int getRow()
        {
            return row;
        }
        /**
         * 行列をゼロクリアする。
         */
        public void zeroClear()
        {
            int i, i2;
            // For順変更OK
            for (i = row - 1; i >= 0; i--)
            {
                for (i2 = clm - 1; i2 >= 0; i2--)
                {
                    m[i][i2] = 0;
                }
            }
        }
        public long[][] getArray()
        {
            return this.m;
        }
        // public void getRowVec(int i_row,NyARVec o_vec)
        // {
        // o_vec.set(this.m[i_row],this.clm);
        // }
        /**
         * aとbの積を自分自身に格納する。arMatrixMul()の代替品
         * 
         * @param a
         * @param b
         * @throws NyARException
         */
        public void matrixMul(NyARFixedFloat16Mat a, NyARFixedFloat16Mat b)
        {
            if (a.clm != b.row || this.row != a.row || this.clm != b.clm)
            {
                throw new NyARException();
            }
            long w;
            int r, c, i;
            long[][] am = a.m, bm = b.m, dm = this.m;
            // For順変更禁止
            for (r = 0; r < this.row; r++)
            {
                for (c = 0; c < this.clm; c++)
                {
                    w = 0L;// dest.setARELEM0(r, c,0.0);
                    for (i = 0; i < a.clm; i++)
                    {
                        w += (am[r][i] * bm[i][c]) >> 16;// ARELEM0(dest, r, c) +=ARELEM0(a, r, i) * ARELEM0(b,i, c);
                    }
                    dm[r][c] = w;
                }
            }
        }
    }
}