/*
 *  mUnit.c
 *  ARToolKit5
 *
 *  This file is part of ARToolKit.
 *
 *  ARToolKit 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 3 of the License, or
 *  (at your option) any later version.
 *
 *  ARToolKit 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 ARToolKit.  If not, see <http://www.gnu.org/licenses/>.
 *
 *  As a special exception, the copyright holders of this library give you
 *  permission to link this library with independent modules to produce an
 *  executable, regardless of the license terms of these independent modules, and to
 *  copy and distribute the resulting executable under terms of your choice,
 *  provided that you also meet, for each linked independent module, the terms and
 *  conditions of the license of that module. An independent module is a module
 *  which is neither derived from nor based on this library. If you modify this
 *  library, you may extend this exception to your version of the library, but you
 *  are not obligated to do so. If you do not wish to do so, delete this exception
 *  statement from your version.
 *
 *  Copyright 2015 Daqri, LLC.
 *  Copyright 2002-2015 ARToolworks, Inc.
 *
 *  Author(s): Shinsaku Hiura, Hirokazu Kato
 *
 */
/*******************************************************
 *
 * Author: Shinsaku Hiura, Hirokazu Kato
 *
 *         shinsaku@sys.es.osaka-u.ac.jp
 *         kato@sys.im.hiroshima-cu.ac.jp
 *
 * Revision: 2.1
 * Date: 99/07/16
 *
 *******************************************************/

#include <stdio.h>
#include <math.h>
#include <AR/ar.h>

int arMatrixUnit(ARMat *unit)
{
	int r, c;

	if(unit->row != unit->clm) return -1;

	for(r = 0; r < unit->row; r++) {
		for(c = 0; c < unit->clm; c++) {
			if(r == c) {
				ARELEM0(unit, r, c) = 1.0;
			}
			else {
				ARELEM0(unit, r, c) = 0.0;
			}
		}
	}

	return 0;
}
