positionparticle.java

一个基于PlaceLab的室内和室外的智能导航系统

package org.placelab.particlefilter.beacon;

import org.placelab.core.TwoDCoordinate;
import org.placelab.particlefilter.Particle;



/**
 * 
 *
 */
public class PositionParticle extends Particle {
	private TwoDCoordinate position;
	
	public PositionParticle(PositionParticle p) {
		super(p);
		position = new TwoDCoordinate(p.position);
	}
	public PositionParticle(TwoDCoordinate pos) {
		super();
		if (pos==TwoDCoordinate.NULL) pos = new TwoDCoordinate(pos);
		position = pos;
	}
	
	public boolean equals(Object o) {
		if (!(o instanceof PositionParticle)) {
			return super.equals(o);
		}
		PositionParticle other = (PositionParticle)o;
		return position.equals(other.position);
	}
	
	public Particle createClone() {
		return new PositionParticle(this);
	}
	
//
//	public static int countOccupancy(double gridSize, ParticleList pList) {
//		Hashtable support=new Hashtable();
//		Object UNUSED=new Object();
//		
//		for (int i=0; i<pList.size();++i) {
//			TwoDimParticle p=(TwoDimParticle)pList.get(i);
//			double gridCellX=p.x/gridSize;
//			double gridCellY=p.y/gridSize;
//			double xTrunc=Math.floor(gridCellX);
//			double yTrunc=Math.floor(gridCellY);
//			String gridCell=""+xTrunc+","+yTrunc;
//			support.put(gridCell,UNUSED);
//		}
//		return support.size();
//	}
//
//	public int countSupport(double gridSize, ParticleList pList) {
//		//I do this to emphasize that this is JUST to get the types
//		//to work out, we don't depend on the state of this object
//		return countOccupancy(gridSize,pList);
//	}	
	/**
	 * @return Returns the position.
	 */
	public TwoDCoordinate getPosition() {
		return position;
	}
	/**
	 * @param position The position to set.
	 */
	public void setPosition(TwoDCoordinate position) {
		this.position = position;
	}
	
	public void moveBy(double x, double y) {
		position.moveBy(x, y);
	}
}