L-Systems Tree Fractal in Java

Tree Fractal example code.

I

	import java.awt.Color;
	import java.awt.Graphics;
	import javax.swing.JFrame;
	import javax.swing.JPanel;
	import javax.swing.SwingUtilities;
	/**
	* @author psychocoder
	*/
	public class L_Systems_Tree extends JPanel {
	private static final long serialVersionUID = 1L;
	public L_Systems_Tree() {
	}
	private void drawTree(Graphics g, int x1, int y1, double angle, int depth) {
	if (depth == 0)
	return;
	int x2 = x1 + (int) (Math.cos(Math.toRadians(angle)) * depth * 12.0);
	int y2 = y1 + (int) (Math.sin(Math.toRadians(angle)) * depth * 12.0);
	g.drawLine(x1, y1, x2, y2);
	drawTree(g, x2, y2, angle - 20, depth - 1);
	drawTree(g, x2, y2, angle + 20, depth - 1);
	}
	@Override
	public void paintComponent(Graphics g) {
	g.setColor(Color.DARK_GRAY);
	drawTree(g, getWidth() / 2, getHeight(), -90, 10);
	}
	public static void main(String... args) {
	final JFrame frame = new JFrame("L Systems - Tree Fractal");
	SwingUtilities.invokeLater(new Runnable() {
	@Override
	public void run() {
	frame.setContentPane(new L_Systems_Tree());
	frame.setSize(1000, 700);
	frame.setLocationRelativeTo(null);
	frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
	frame.setResizable(true);
	frame.setVisible(true);
	}
	});
	}
	}

view raw L_Systems_Tree.java hosted with ❤ by GitHub

I made it a bit more shiny. I modified the above code a bit and got the following. [Code for modified fractal given below]

	import java.awt.BasicStroke;
	import java.awt.Color;
	import java.awt.GradientPaint;
	import java.awt.Graphics;
	import java.awt.Graphics2D;
	import java.awt.Paint;
	import java.awt.RenderingHints;
	import javax.swing.JFrame;
	import javax.swing.JPanel;
	import javax.swing.SwingUtilities;
	/**
	* @author psychocoder
	*/
	public class L_Systems_Tree extends JPanel {
	private static final long serialVersionUID = 1L;
	private void drawTree(Graphics2D g, int x1, int y1, double angle, int depth) {
	if (depth == 0) {
	return;
	}
	int x2 = x1 + (int) (Math.cos(Math.toRadians(angle)) * depth * 12.0);
	int y2 = y1 + (int) (Math.sin(Math.toRadians(angle)) * depth * 12.0);
	g.setStroke(new BasicStroke(2.0f, BasicStroke.JOIN_ROUND, BasicStroke.JOIN_MITER, 5.0f, new float[]{6.0f, 2.0f}, 1.0f));
	g.drawLine(x1, y1, x2, y2);
	g.setColor(Color.green);
	drawTree(g, x2, y2, angle - 25, depth - 1);
	g.setColor(Color.red);
	drawTree(g, x2, y2, angle - 15, depth - 1);
	g.setColor(Color.WHITE);
	drawTree(g, x2, y2, angle + 25, depth - 1);
	}
	@Override
	public void paintComponent(Graphics g) {
	Graphics2D g2 = (Graphics2D) g;
	g2.setRenderingHint(RenderingHints.KEY_ALPHA_INTERPOLATION, RenderingHints.VALUE_ALPHA_INTERPOLATION_QUALITY);
	g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
	g2.setRenderingHint(RenderingHints.KEY_COLOR_RENDERING, RenderingHints.VALUE_COLOR_RENDER_QUALITY);
	g2.setRenderingHint(RenderingHints.KEY_DITHERING, RenderingHints.VALUE_DITHER_ENABLE);
	g2.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);
	g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
	g2.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
	g2.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE);
	g2.setColor(new Color(25, 25, 25));
	Paint p = new GradientPaint(0, 110, Color.black, 10, getHeight(), new Color(25, 25, 25));
	g2.setPaint(p);
	g2.fillRect(0, 0, getWidth(), getHeight());
	g2.setColor(Color.red);
	for (int i = 1; i < 10; i++) {
	drawTree(g2, getWidth() / 2, getHeight()+10, -100, i);
	}
	}
	public static void main(String... args) {
	final JFrame frame = new JFrame("L Systems - Tree Fractal");
	SwingUtilities.invokeLater(new Runnable() {
	@Override
	public void run() {
	frame.setContentPane(new L_Systems_Tree());
	frame.setSize(1000, 700);
	frame.setLocationRelativeTo(null);
	frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
	frame.setResizable(true);
	frame.setVisible(true);
	}
	});
	}

view raw L_Systems_Tree.java hosted with ❤ by GitHub

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