/*
 * Pixel Dungeon
 * Copyright (C) 2012-2015 Oleg Dolya
 *
 * Shattered Pixel Dungeon
 * Copyright (C) 2014-2026 Evan Debenham
 *
 * 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/>
 */

package com.watabou.noosa.tweeners;

import com.watabou.noosa.Visual;

public class AlphaTweener extends Tweener {

	public Visual image;
	
	public float start;
	public float delta;
	
	public AlphaTweener( Visual image, float alpha, float time ) {
		super( image, time );
		
		this.image = image;
		start = image.alpha();
		delta = alpha - start;
	}

	@Override
	protected void updateValues( float progress ) {
		image.alpha( start + delta * progress );
	}
}
