package tools;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.geom.GeneralPath;
import java.awt.image.BufferedImage;
import java.util.Random;

/*
 * FlowerTutorial - A random cartoon rock/treetop generator
 * Copyright (c) 2007 Alexander Hristov. See http://www.ahristov.com/tutorial for more tutorials
 * 
 * This application is free software; you can redistribute it and/or modify it under the terms 
 * of the GNU Lesser General Public License as published by the Free Software Foundation; 
 * version 2.1 of the License.
 * 
 * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; 
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 
 * See the GNU Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License along with this library; 
 * if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, 
 * MA 02111-1307 USA 
 */


public class RockTutorial extends Frame {
	public static final double MIN_X = -1024/2.0;
	public static final double MAX_X = 1024/2.0;
	
		
	public static void main(String[] x) {
		new RockTutorial();
	}
	
	
	public RockTutorial() {
		setBounds(0,0,1024,768);
		setVisible(true);
		addWindowListener(
				new WindowAdapter() {
					public void windowClosing(WindowEvent e) {
						System.exit(0);
					}
				}
				);
	}
	
	public void paint(Graphics gg) {
		Graphics2D g = (Graphics2D)gg;
		
		
		GeneralPath rockPath = new GeneralPath();
		
		// Starting color of the rock. Subsequent layers
		// become darker and darker
		float rockHue = 0;
		float rockSaturation = 14/255f;
		float rockBrightness = 100/255f;
		
		//	 Number of vertices
		int numPoints = 20;  
		
		//	 Width of the rock in pixels
		int rockSize = 200;	 
		
		
		// Intensity of the deformation. The closer to 1 - the more jagged is the
		// resulting rock
		double intensity = 0.3;
		
		BufferedImage rockImage = new BufferedImage(rockSize,rockSize,BufferedImage.TYPE_INT_ARGB);

		// Create tha basic polygon
		Graphics2D gRock = rockImage.createGraphics();
		for (int point = 0; point < numPoints; point++) {
			
			// Calcuate a random perturbation along the axis of the nth point
			double pertx = Math.random()*(rockSize/2.5*intensity)-rockSize/2.5*(intensity/2);
			double perty = Math.random()*(rockSize/2.5*intensity)-rockSize/2.5*(intensity/2);
			double angle = Math.PI/10*point;
			int x = rockSize/2+(int)(rockSize/2.5*Math.cos(angle) + pertx*Math.cos(angle));
			int y = rockSize/2-(int)(rockSize/2.5*Math.sin(angle) + perty*Math.sin(angle));
			if (point == 0)
				rockPath.moveTo((int)x,y);
			else
				rockPath.lineTo((int)x,y);
		}
		rockPath.closePath();
		gRock.setColor(Color.getHSBColor(rockHue,rockSaturation,rockBrightness));
		gRock.fill(rockPath);
		gRock.setClip(rockPath);
		
		
		//	 Number of layers
		int numLayers = 3;	 
		
		Random rnd = new Random();
		for (int layer = 1; layer < numLayers; layer++) {
			int tx = (int)(rockSize/2.5/numLayers*layer);
			int ty = (int)(rockSize/2.5/numLayers*layer);
			double sx = 0.05/(rnd.nextDouble()+0.1);
			double sy = 0.05/(rnd.nextDouble()+0.1);
			gRock.translate(tx,ty);
			gRock.shear(sx,sy);

			gRock.setColor(Color.getHSBColor(rockHue,rockSaturation,rockBrightness*(1-layer/(float)(numLayers+10))));
			gRock.fill(rockPath);
			gRock.setColor(Color.black);
			gRock.draw(rockPath);
		}
		gRock = rockImage.createGraphics();
		gRock.setStroke(new BasicStroke(2));
		gRock.setColor(Color.black);
		gRock.draw(rockPath);
		
		
		// Draw the rock
		for (int i = 0; i < 5; i++) {
			g.drawImage(rockImage,(rockSize+50)*i,100,null);
		}

	}
}