//CarLight.java
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Color;
import java.awt.MediaTracker;

public class CarLight extends EinsteinObject
{
	Einstein EIN;
	Image im = null;
	boolean good = true;
	int LightInterval = 60;
	double u = .3;
	
	
	public CarLight(double v, Einstein e)
	{
		super(v,e);
		EIN = e;
	}
	
	public void draw(boolean whichFrame, Graphics g)
	{
		Reality displayReality;
		double position;
		double theTime;
		double gamma;
		double velocity;
		if (whichFrame == Reality.OBJECT_FRAME)
		{
			displayReality = getReality();
			position = displayReality.myX;
			theTime = displayReality.myTime;
			gamma = 1;
			velocity = 0;
		}
		else
		{
			displayReality = EIN.getReality();
			velocity = displayReality.getV();
			position = displayReality.theirX;
			theTime = displayReality.theirTime;
			gamma = displayReality.gamma;
		}
		
		g.drawImage(im,EIN.space.mapX(position)-im.getWidth(EIN),EIN.space.mapY(0)-(int)(im.getHeight(EIN)*.5),EIN);
		double theta = Math.PI/5;
		int[] xP = {EIN.space.mapX(position),EIN.space.mapX(theTime),EIN.space.mapX(theTime)};
		int[] yP = {EIN.space.mapY(0),EIN.space.mapY(theTime * Math.tan(theta)),EIN.space.mapY(-theTime*Math.tan(theta))};
		g.setColor(Color.yellow);
		g.fillPolygon(xP,yP,3);
		if (!good) EIN.showStatus("Not good");
		if (im== null) EIN.showStatus("nutz");
	}
	
	public void setCar(Image i)
	{
		if (i == null) good = false;
		MediaTracker mt = new MediaTracker(EIN);
		im = i;
		mt.addImage(im,0);
		try 
		{
			mt.waitForAll();
		}
		catch (InterruptedException ie) {}
	}
	
	public void timeDraw(boolean whichFrame,Graphics g)
	{
		Color color1=null,color2=null;
		Reality real = EIN.getReality();
		boolean object = false;
		if (EIN.frame == Reality.OBJECT_FRAME)
		{
			real = EIN.mover.getReality();	
			color1 = Color.blue;
			color2 = Color.red;
			object = true;
		}
		else
		{
			color1 = Color.red;
			color2 = Color.blue;
		}
		EIN.offscr2.setColor(color1);
		EIN.time.drawPoint(real.myX,real.myTime,g);
		EIN.time.drawLine(0,0,real.myX,real.myTime,g);
		EIN.offscr2.setColor(color2);
		EIN.time.drawPoint(real.theirX,real.myTime,g);
		EIN.time.drawLine(0,0,real.theirX,real.myTime,g);
		g.setColor(Color.yellow); 
		double dist = Math.sqrt(real.myX*real.myX + real.myTime*real.myTime);
		double numLights = (int) Math.floor(dist / LightInterval);
		
		for (int loop=0;loop <= numLights;loop++)
		{
			if ((real.getV() == 0) || object)
			{
				g.setColor(Color.yellow);
				EIN.time.drawPoint(real.myTime-LightInterval*loop,real.myTime,g);
				EIN.time.drawLine(0,LightInterval*loop,real.myTime-LightInterval*loop,real.myTime,g);
				//g.setColor(Color.cyan);
				//EIN.time.drawPoint(real.myTime-LightInterval*loop,real.myTime,g);
				//EIN.time.drawLine(0,LightInterval*loop,real.myTime-LightInterval*loop,real.myTime,g);
			}
			else
			{
				g.setColor(Color.yellow);
				double theta = Math.atan(1/real.getV());
				double LenDiff = real.myTime - LightInterval*loop*Math.sin(theta);
				//if (loop == numLights) EIN.showStatus("LenDiff= "+LenDiff);
				EIN.time.drawPoint(LightInterval*loop*Math.cos(theta)+LenDiff,LightInterval*loop*Math.sin(theta)+LenDiff,g);
				EIN.time.drawLine(LightInterval*loop*Math.cos(theta),LightInterval*loop*Math.sin(theta),LightInterval*loop*Math.cos(theta)+LenDiff,LightInterval*loop*Math.sin(theta)+LenDiff,g);
				/*g.setColor(Color.cyan);
				double v_combo = (real.getV()- .3)/(1 - (.3*real.getV()));
				double theta2 = Math.atan(1/v_combo);
				double LenDifft = real.myTime - LightInterval*(loop+.5)*Math.sin(theta);
				double LenDiffx = v_combo*LenDifft+LightInterval*(loop+.5)*Math.cos(theta);
				//if (loop == numLights) EIN.showStatus("LenDiff= "+LenDiff);
				EIN.time.drawPoint(LightInterval*(loop+.5)*Math.cos(theta)+theta2*LenDiffx,LightInterval*(loop+.5)*Math.sin(theta)+LenDifft,g);
				EIN.time.drawLine(0,0,LightInterval*loop*Math.cos(theta)+LenDiffx,LightInterval*loop*Math.sin(theta)+LenDifft,g);
				*/
			}	
		}
	}
}