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​​Lab 7: Game

​​Bard College – Computer Science – Object-Oriented Programming

​​

​​In this lab you will build upon a small game, refactoring it into classes and adding a score keeping system.

​​Warm-Up

​​Go through the draw function with a partner and add comments to describe what it is doing.

​​Refactoring Pong (or Breakout)

​​Make the following changes to the provided sketch:

​​

1. ​​reorganize the sketch using classes (e.g. Ball​, Paddle​);

1. ​​create methods for moving, displaying, bouncing, etc.

2. ​​make a change in terms of the appearance of the game;

3. ​​a point tally should be displayed (you decide how points are awarded or deducted);

4. ​​create a third object: consider creating a second paddle, another ball and score.

​​

​​All your methods should have a comment at the top describing what they do.

​​

​​float paddle_x;

​​float paddle_step;

​​float paddle_h = 16;

​​float paddle_w = 5 * paddle_h;

​​float ball_x, ball_y;

​​float ball_x_step, ball_y_step;

​​float ball_r = 13;

​​


​​void setup() {

​​  size(600, 300);

​​  paddle_x = width/2;

​​  paddle_step = 0;

​​  reset();

​​}

​​


​​void reset() {

​​  ball_x = random(ball_r, width - ball_r);

​​  ball_y = random(ball_r, height/2 );

​​  ball_x_step = random(-3, 3);

​​  ball_y_step = random(1, 3);

​​}

​​


​​void keyPressed() {

​​  if (key == CODED && keyCode == LEFT) {

​​    paddle_step = -3;

​​  } else if (key == CODED && keyCode == RIGHT) {

​​    paddle_step = 3;

​​  } else if (key == ' ') {

​​    reset();

​​  }

​​}

​​


​​void keyReleased() {