import java.awt.*;
import java.applet.Applet;
import java.util.*;

public class AutumnLeaves extends PictureWorld {

    Color brown = new Color(200,100,50); // (red, green, blue) 


    public void initializePictureChoices() {
	// Define your pictures here and in auxiliary methods.
	// Add your pictures to the menu via "addPictureChoice(String name, Picture pic);"
	
	addPictureChoice("autumnLeaves", autumnLeaves());
	addPictureChoice("autumnLeaves2", autumnLeaves2());
	addPictureChoice("branch4()", branch4());
	addPictureChoice("branch3()", branch3());
	addPictureChoice("branch2()", branch2());
	addPictureChoice("twoLeaves(Color.red)", twoLeaves(Color.green));
	addPictureChoice("twoLeaves(Color.orange)", twoLeaves(Color.orange));
	addPictureChoice("twoLeaves(Color.yellow)", twoLeaves(Color.yellow));
	addPictureChoice("twoLeaves(brown)", twoLeaves(brown));
    }
    
    public Picture autumnLeaves () {
	return rotations(branch4());
    } 	

    public Picture autumnLeaves2 () {
	return rotations(URNest(twoLeaves(Color.red), 
				URNest(twoLeaves(brown), 
				       URNest(twoLeaves(Color.orange), 
					      twoLeaves(Color.yellow)))));
    } 	

    public Picture branch4 () {
	return URNest(twoLeaves(Color.red), branch3());
    } 	


    public Picture branch3 () {
	return URNest(twoLeaves(brown), branch2());
    } 	

    public Picture branch2 () {
	return URNest(twoLeaves(Color.orange), twoLeaves(Color.yellow));
    } 	
 	
 	
    // Auxiliary methods 
    public Picture fourPics (Picture p1, Picture p2, Picture p3, Picture p4) {
	return above(beside(p1,p2),beside(p3,p4));
    }
 	
    public Picture fourSame (Picture p) {
	return fourPics(p,p,p,p);
    }
 	
    public Picture rotations (Picture p) {
	return fourPics(clockwise270(p),p,clockwise180(p),clockwise90(p));
    }

    public Picture URNest (Picture whole, Picture upperRight) {
	return overlay(fourPics(empty(), upperRight, empty(), empty()), 
		       whole); 
    }
 	
    public Picture twoLeaves (Color c) {
	Line branch = new Line(0.0, 0.0, 0.5, 0.5, c);
	Poly leaf1 = new Poly(c, true);
	// Add points in counterclockwise fashion. 
	// Two consecutive points will be connected by a line. 
	leaf1.addPoint(0.0, 0.0);
	leaf1.addPoint(0.5, 0.0);
	leaf1.addPoint(1.0, 0.25);
	leaf1.addPoint(0.5, 0.25);
	Poly leaf2 = new Poly(c, true);
	// Add points in counterclockwise fashion. 
	// Two consecutive points will be connected by a line. 
	leaf2.addPoint(0.25, 0.25);
	leaf2.addPoint(0.5, 0.625);
	leaf2.addPoint(0.5, 1.0);
	leaf2.addPoint(0.25, 0.625);
	// Challenge: instead of defining leaf1 and leaf2 from scratch, 
	// it is possible to define them both in terms of a single leaf picture.
	// Can you figure out how?
	return overlay(leaf1, overlay(leaf2, branch));
    }
 	
}