import java.awt.geom.*;
import java.awt.*;
import java.util.ArrayList;

public class Plus implements FractalObject
{
	private Point2D.Double center;
	private double armLength;
	private static double armFraction = 2.1;

	public Plus(Point2D.Double center_, double armLength_)
	{
		center = center_;
		armLength = armLength_;
	}

	public void draw(Graphics2D g2)
	{
		g2.draw(new Line2D.Double(center.getX() - armLength, center.getY(), center.getX() + armLength, center.getY()));
		g2.draw(new Line2D.Double(center.getX(), center.getY() - armLength, center.getX(), center.getY() + armLength));	
	}
	
	public ArrayList addChildren(ArrayList cur)
	{
	    cur.add(new Plus(new Point2D.Double((center.getX() + (center.getX() + armLength)) / 2.0, center.getY()), armLength / armFraction));
	    cur.add(new Plus(new Point2D.Double((center.getX() + (center.getX() - armLength)) / 2.0, center.getY()), armLength / armFraction));
	    cur.add(new Plus(new Point2D.Double(center.getX(), (center.getY() + (center.getY() + armLength)) / 2.0), armLength / armFraction));
	    cur.add(new Plus(new Point2D.Double(center.getX(), (center.getY() + (center.getY() - armLength)) / 2.0), armLength / armFraction));
	    return cur;
	}
	
	public void setParameter(double armFraction_)
	{
	    armFraction = armFraction_;
	}
}