Ball

/**
 * Source code untuk class Ball.
 *
 * @author Ahmad Lamaul Farid
 * @version 16 Desember 2020
 */

 package pong;
 import java.awt.Color;
 import java.awt.Graphics;
 import java.util.Random;
 public class Ball
 {
      public int x, y, width = 25, height = 25;
      public int motionX, motionY;
      public Random random;
      private Pong pong;
      public int amountOfHits;
      public Ball(Pong pong)
      {
           this.pong = pong;
           this.random = new Random();
           spawn();
      }
      public void update(Paddle paddle1, Paddle paddle2)
      {
           int speed = 5;
           this.x += motionX * speed;
           this.y += motionY * speed;
           if (this.y + height - motionY > pong.height || this.y + motionY < 0)
           {
                if (this.motionY < 0)
                {
                     this.y = 0;
                     this.motionY = random.nextInt(4);
                     if (motionY == 0)
                     {
                          motionY = 1;
                     }
                }
                else
                {
                     this.motionY = -random.nextInt(4);
                     this.y = pong.height - height;
                     if (motionY == 0)
                     {
                          motionY = -1;
                     }
                }
           }
           if (checkCollision(paddle1) == 1)
           {
                this.motionX = 1 + (amountOfHits / 5);
                this.motionY = -2 + random.nextInt(4);
                if (motionY == 0)
                {
                     motionY = 1;
                }
                amountOfHits++;
           }
           else if (checkCollision(paddle2) == 1)
           {
                this.motionX = -1 - (amountOfHits / 5);
                this.motionY = -2 + random.nextInt(4);
                if (motionY == 0)
                {
                     motionY = 1;
                }
                amountOfHits++;
           }
           if (checkCollision(paddle1) == 2)
           {
                paddle2.score++;
                spawn();
           }
           else if (checkCollision(paddle2) == 2)
           {
                paddle1.score++;
                spawn();
           }
      }
      public void spawn()
      {
           this.amountOfHits = 0;
           this.x = pong.width / 2 - this.width / 2;
           this.y = pong.height / 2 - this.height / 2;
           this.motionY = -2 + random.nextInt(4);
           if (motionY == 0)
           {
                motionY = 1;
           }
           if (random.nextBoolean())
           {
                motionX = 1;
           }
           else
           {
                motionX = -1;
           }
      }
      public int checkCollision(Paddle paddle)
      {
           if (this.x < paddle.x + paddle.width && this.x + width > paddle.x && this.y < paddle.y + paddle.height && this.y + height > paddle.y)
           {
                return 1; //bounce
           }
           else if ((paddle.x > x && paddle.paddleNumber == 1) || (paddle.x < x - width && paddle.paddleNumber == 2))
           {
                return 2; //score
           }
           return 0; //nothing
      }
      public void render(Graphics g)
      {
           g.setColor(Color.WHITE);
           g.fillOval(x, y, width, height);
      }
 }