//Shape3D.java
//demo of inheritance and polymorphism

import java.awt.*;

//
public abstract class Shape3D {

    private Point3D center;
    private Color color;
    private String id;

    public Shape3D() {
	center = new Point3D();
		center.x = (int)(Math.random()*400);
	        center.y = center.z = (int)(Math.random()*400);
	//	color = new Color( Color.WHITE );
	color =  Color.WHITE;

    }

    public Shape3D( Point3D p, Color c ) {
	center = p;   //fix
	color = c;    //fix
    }

    public Point3D getCenter() {
	return center;
    }


    public void setID( String newID ) {
	id = newID;
    }

    public String getID() {
	return id;
    }

    public int getX() {
	return center.x;
    }

    public int getY() {
	return center.y;
    }

    public int getZ() {
	return center.z;
    }

    public void setColor( Color newColor ) {
	color = newColor;
    }

    public Color getColor() {
	return color;
    }

    public void move( int dx, int dy, int dz ) {
	center.x += dx;
	center.y += dy;
	center.z += dz;
    }

    public void moveTo( Point3D newCenter ) {
	center.x = newCenter.x;
	center.y = newCenter.y;
	center.z = newCenter.z;
    }

    //abstract methods must be implmented in every (non-abstract) subclass
    public abstract double getArea();

    public abstract double getVolume();

    public abstract void draw( Graphics g );
}


class Point3D extends Point {
    public int z;

    public Point3D() {
	super(0,0);
	z = 0;
    }

    public Point3D( Point3D p ) {
	super( p.x, p.y );
	z = p.y;
    }
}


class Cone extends Shape3D {
    private double radius;
    private double height;

    public Cone() {
	radius = 1;
	height = 1;
	setID( "cone " + (int)(Math.random()*1000) );
    }

    public Cone( double r, double h ) {
	radius = r;
	height = h;
    }
    //others...

    public double getArea() {
	return Math.PI * radius * Math.sqrt(radius * radius + height * height) + 
	    Math.PI * radius * radius;
    }

    public double getVolume() {
	return 1.0/3.0 * Math.PI * radius * radius * height;
    }

    public void draw( Graphics g ){
	g.drawString( getID(), getX(), getY());
    }
}

class Sphere extends Shape3D {
    private double radius;

    public Sphere() {
	radius = 1;
	setID( "sphere " + (int)(Math.random()*1000) );
    }

    public Sphere( double r ) {
	radius = r;
    }
    //others...

    public double getArea() {
	return 4 * Math.PI * radius * radius;
    }

    public double getVolume() {
	return 4.0/3.0 * Math.PI * radius * radius * radius;
    }

    public void draw( Graphics g ){
	g.drawString( getID(), getX(), getY());
    }
}




/*

    //calculate the area of a cylinder
    cylarea = 2 * PI * radius * height + 2 * PI * radius * radius;
    //calculate the area of a sphere
    spharea = 
    //calculate the area of a cone
    //calculate the area of a cube
    cubarea = 6 * height * height;
    //calculate the volume of sphere
    sphvol = 
    //calculate the volume of a cylinder
    cylvol = PI * radius * radius * height;
    //calculate the volume of a cone
    //calculate the volume of cube
    cubvol = height * height * height;
*/