PrimitiveAnimator.java

import java.util.ArrayList;
import java.util.Map;
import java.util.TreeMap;

public class PrimitiveAnimator implements PrimitiveModifier, JSONSerializable{

	PrimitiveAnimator(){}
	PrimitiveAnimator(ScenePrimitive sp){
		setPrimitive(sp);
	}

	public void setPrimitive(ScenePrimitive sp){
		if (!(sp instanceof ZSprite))
			throw new IllegalArgumentException("no zsprite");
		prim=(ZSprite)sp;
	}

	public PrimitiveModifier clone(ScenePrimitive sp){
		PrimitiveAnimator pa = new PrimitiveAnimator(sp);
		pa.velocity = velocity;
		for (Integer i: roiPos)
			pa.roiPos.add(i.intValue());
		for (Integer i: roiSize)
			pa.roiSize.add(i.intValue());
		return pa;
	}

	public float velocity;
	public ArrayList<Integer> roiPos=new ArrayList<Integer>();
	public ArrayList<Integer> roiSize=new ArrayList<Integer>();
	public ZSprite prim;
	public float time;
	public void calculate(double timeStep){
		time += timeStep*velocity/1000.0f;
		while (time>=roiPos.size()/2) time-=roiPos.size()/2;
		while (time<0) time+=roiPos.size()/2;
		int curRoi = (int)Math.floor(time);
		int roiX = roiPos.get(curRoi*2);
		int roiY = roiPos.get(curRoi*2+1);
		int roiW = prim.w;
		int roiH = prim.h;
		if (2*curRoi+1<roiSize.size()){
			roiW = roiSize.get(curRoi*2);
			roiH = roiSize.get(curRoi*2+1);
		} else {
			roiW = roiSize.get(0);
			roiH = roiSize.get(1);
		}
		prim.setROI(roiX, roiY, roiW, roiH);
	}

	public Map<String, Object> jsonSerialize() {
		TreeMap<String,Object> tm = new TreeMap<String,Object>();
		tm.put("type", "PrimitiveAnimator");
		tm.put("roipos", roiPos);
		tm.put("roisize", roiSize);
		tm.put("velocity", velocity);
		return tm;
	}

	public void jsonDeserialize(Object obj) {
		Map<String, Object> map=(Map<String, Object>) obj;
		ArrayList<Number> newa = (ArrayList<Number>)map.get("roipos");
		roiPos.clear();
		for (Number n: newa) roiPos.add(n.intValue());
		newa = (ArrayList<Number>)map.get("roisize");
		roiSize.clear();
		for (Number n: newa) roiSize.add(n.intValue());
		velocity=((Number) map.get("velocity")).floatValue();

	}

}