sound example

// A sound file object

var dingdong;

​

// A doorbell object (that will trigger the sound)

var doorbell;

​

​

function preload() {

  // Load the sound file.

  // We have included both an MP3 and an OGG version.

  soundFormats('mp3', 'ogg');

  dingdong = loadSound('bell.mp3');

}

​

function setup() {

  createCanvas(200, 200);

​

  // Create a new doorbell

  doorbell = new Doorbell(width/2, height/2, 64);

}

​

function draw() {

  background(255);

  // Show the doorbell

  doorbell.display(mouseX, mouseY);

}

​

function mousePressed() {

  // If the user clicks on the doorbell, play the sound!

  if (doorbell.contains(mouseX, mouseY)) {

    dingdong.play();

  }

}

​

// A Class to describe a "doorbell" (really a button)

var Doorbell = function(x_, y_, r_) {

  // Location and size

  var x = x_;

  var y = y_;

  var r = r_;

​

  // Is a point inside the doorbell? (used for mouse rollover, etc.)

  this.contains = function(mx, my) {

    if (dist(mx, my, x, y) < r) {

      return true;

    } else {

      return false;

    }

  };

​

  // Show the doorbell 

  this.display = function(mx, my) {

    if (this.contains(mx, my)) {

      fill(100);

    } else {

      fill(175);

    }

    stroke(0);

    strokeWeight(4);

    ellipse(x, y, r, r);

  };

};