/*
 * File: ftk_interpolator_decelerate.h    
 * Author:  Li XianJing <xianjimli@hotmail.com>
 * Brief:   decelerate interpolator for animation.
 *
 * Copyright (c) 2009 - 2011  Li XianJing <xianjimli@hotmail.com>
 *
 * Licensed under the Academic Free License version 2.1
 *
 * 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 2 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

/*
 * History:
 * ================================================================
 * 2011-03-20 Li XianJing <xianjimli@hotmail.com> created
 *
 */

#include "ftk_interpolator.h"

static float ftk_interpolator_decelerate_get(FtkInterpolator* thiz, float percent)
{
	return (float)(1.0f - (1.0f - percent) * (1.0f - percent));
}

const static FtkInterpolator s_interpolator_decelerate = 
{
	ftk_interpolator_decelerate_get,
	NULL
};

FtkInterpolator* ftk_interpolator_decelerate_create(void)
{
	return (FtkInterpolator*)&s_interpolator_decelerate;
}