import java.awt.Color;
import java.awt.Graphics;

import javax.swing.JFrame;
import javax.swing.JMenuBar;
import javax.swing.JPanel;


public class RecursiveLinesExample extends JPanel {
	public final static int WIDTH = 640;
	public final static int HEIGHT = 480;
	public final static int FAN_OUT = 10;
	public final static int MAX_LENGTH = 100;
	public final static int LENGTH_DECREMENT = 20;
	public final static int TOTAL_DEGREES = 360;

	public static void main(String[] args) {
		JFrame frame = new JFrame("Recursive Lines Example");
		FileChooserExample panel = new FileChooserExample();
		frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
		frame.setSize(WIDTH, HEIGHT);
		frame.setLocationRelativeTo(null);
		
		frame.setContentPane(new RecursiveLinesExample());
		
		frame.setVisible(true);
		frame.repaint();
	}
	
	public void paint(Graphics g) {
		super.paint(g);
		drawLines(g, WIDTH / 2, HEIGHT / 2, MAX_LENGTH);
	}
	
	public void drawLines(Graphics g, int x, int y, int length) {
		if (length == 0) {
			return;
		}
		for (int angle = 0; angle <= TOTAL_DEGREES; angle += TOTAL_DEGREES / FAN_OUT) {
			int x2 = (int)(x + length * Math.cos(Math.toRadians(angle)));
			int y2 = (int)(y + length * Math.sin(Math.toRadians(angle)));
			g.setColor(new Color((float)Math.random(), (float)Math.random(), (float)Math.random()));
			g.drawLine(x, y, x2, y2);
			drawLines(g, x2, y2, length - LENGTH_DECREMENT);
		}
	}
}