/*
 * Moonlight|3D
 * Copyright (C) 2006 The Moonlight|3D team
 * 
 * This library 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 2.1 of the License, or (at your option) any later version.
 * 
 * This library 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 this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Created on May 2, 2006
 */
package ml.backend.anim;

import java.util.ArrayList;

import ml.backend.anim.KeyframeAnimationTrack.KeyValuePair;
import ml.core.helper.Value;
import ml.core.helper.Value.Type;

public class ConstantValueInterpolator implements KeyframeInterpolator {

	public boolean isAppliciable(Type valueType) {
		return true; // this interpolator can handle all types
	}

	public Value interpolate(KeyframeAnimationTrack track, double time) {
		ArrayList<KeyValuePair> keys=track.getKeyList();
		
		if(keys.size()==0) {
			return track.getDefaultValue();
		}
		if(keys.get(0).time>time) {
			return keys.get(0).value;
		}
		if(time>keys.get(keys.size()-1).time) {
			return keys.get(keys.size()-1).value;
		}
		for(int i=0;i<keys.size();i++) {
			if(time>keys.get(i).time) {
				return keys.get(i).value;
			}
		}
		
		return null; // this line should never actually be reached
	}

	public String getType() {
		return "ConstantValueInterpolator";
	}

}