Pong Game Example

//variables

float xPos, xSpeed; // horizontal motion

float yPos, ySpeed; // vertical motion

int score; //score

int red, green, blue; //colours

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//setup

void setup () {

  red = 255;

  green = 255;

  blue = 0;

  xPos = 250;

  yPos = 250;

  xSpeed = 3;

  ySpeed = 5;

  score = 0;

  size (500, 500);

  background(0, 255, 255);

}

​

// forever loop

void draw () {

  noStroke();

  fill(0, 25);

  rect (0, 0, width, height);

  // ball

  fill (red, green, blue);

  ellipse (xPos, yPos, 30, 30);

  xPos = xPos + xSpeed;

  yPos = yPos + ySpeed;

  if (xPos < 15) {

    xSpeed = xSpeed * - 1;

  }

  if (xPos > 500) {

    xSpeed = 0;

    ySpeed = 0;

    textSize(45);

    textAlign (CENTER);

    text("Game Over\nTry Again", 250, height - 150);

  }

  if (yPos > 485 || yPos < 15) {

    ySpeed = ySpeed * - 1;

  }

  if (xSpeed > 0 && xPos > 455 && yPos > mouseY && yPos < mouseY+120){

    xSpeed = xSpeed * -1.1;

    score = score + 1;

    red = random(100, 255);

    green = random (100, 255);

    blue = random (100, 255);

  }

  // paddle

  rect (width-30, mouseY, 50, 120, score*2);

  textAlign(CENTER);

  textSize (50);

  text ("SCORE: " + score, width/2, height/2);

}

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