/*
 * Ball.java
 *
 * Created on July 9, 2004, 11:38 AM
 */

/**
 *
 * @author  levenick
 */
import java.awt.*;
public class Ball extends FilledCircle {
    public static int GRAVITY=1;
    
    private int vx, vy;
    //private int nuX=100, nuY=100;
    
    /** Creates a new instance of Ball */
    public Ball() {
    }
    
    public Ball(int x, int y, int r, Color c) {
        super(x,y,r,c);
    }
    
    public Ball(int x, int y, int r, Color c, int vx, int vy) {
        this(x,y,r,c);
        this.vx = vx;
        this.vy = vy;
    }
    
    public void badstep() {
        x += vx;
        y += vy;
        vy += GRAVITY;
        if (y+radius > BallFrame.HT) { // if it hit the wall
            vy = -vy;       // reverse direction
            System.out.println("vy=" + vy + " y=" + y);
        }
    }

    public void betterstep() {
        x += vx;
        y += vy;
        
        if (y+radius > BallFrame.HT) { // if it hit the wall
            vy = -vy*9/10;       // reverse direction
            System.out.println("vy=" + vy + " y=" + y);
        }
        else vy += GRAVITY;
    }

    public void step() {
        x += vx;
        
        int bottomY = BallFrame.HT-(radius+y);
        if (vy >= bottomY) {
            //System.out.println("vy=" + vy + " y=" + y);
            int bounceHt = vy - bottomY;    // how high it bounces this step
            y = BallFrame.HT - (radius + bounceHt);  // the y-coord after this step
            vy = -(vy-1)*9/10;
        }
        else {
            y += vy;
            vy += GRAVITY;
        }
    }
     /*public void unpaint(Graphics g) {
        Color oldColor = getColor();
        setColor(Color.WHITE);
        paint(g);
        setColor(oldColor);
    }*/
    
    /*public void update() {
        x = nuX;
        y = nuY;
    }*/
    
   /*public void step() {
        nuX += vx;
        nuY += vy;
        vy += GRAVITY;
        if (nuY>300-radius) {
            vy = -vy;
            nuY = 300-radius;
        }
        if (nuY-radius <0) {
            vy = -vy;
            nuY = radius;
        }
    }*/
}