Pong

1. Start a new sketch with draw and setup methods.

2. Set your canvas size and background color in the setup method

size(width, height)
background(red, green, blue)

3. In your draw method, draw a ball on the screen.

fill(red, green, blue);
stroke(red, green, blue);
ellipse(x, y, width, height);

4. Make the ball move across the screen (left to right).
      Hint: make a variable for the ball's X position and change it in the draw method.

5. Change the speed of the ball.
     Hint: make a variable for the speed of the ball in the X direction (from left to right).
     Changing this variable should change the speed of your ball.

6. Bounce the ball off the side walls.
     Hint: Use the value width that Processing provides.

7. Do the same for the top and bottom
     Hint: Use the value height that Processing provides.

8. Make a sound when the ball falls on the ground. You will need to drop a sound file (pong.wav) on your sketch. Then add the following code. Note: You may need to import the Minim library into your sketch. Ask your teacher how to do this.

At the top of the sketch:

import ddf.minim.*;
Minim minim;
AudioSample sound;

In the setup() method:

minim = new Minim (this);
sound = minim.loadSample("pong.wav", 128);

In the draw() method (when the ball hits the bottom):

sound.trigger();

9. Add a background image for your game. First drop the image file on your sketch.

At the top of the sketch:

PImage backgroundImage;

In the setup() method:

backgroundImage = loadImage("image.jpg");

In the draw() method:

image(backgroundImage, 0, 0);
image(backgroundImage, 0, 0, width, height);

10. Draw a paddle at the bottom of the screen

rect(x, y, width, height);

11. Make the paddle move over and back with the mouse.
      Hint: Use mouseX

12. Make the ball change Y direction when it hits the paddle. Figure it out by yourself, or use this method:

boolean intersects(int ballX, int ballY, int paddleX, int paddleY, int paddleLength) {
     if (ballY > paddleY && ballX > paddleX && ballX < paddleX + paddleLength)
          return true;
     else
          return false;
}