demo.js

function SimpleAnimation() {
  pix.Component.apply(this);
  this.t = 0;
};
SimpleAnimation.prototype = new pix.Component();
SimpleAnimation.prototype.update = function(dt) {
  this.t += dt;
  if (this.t >= Math.PI * 2) {
    this.t = 0;
  }
  this.owner.rotation += dt;
  
  var s = Math.abs(Math.sin(this.t * 4)) + 4.0;
  this.owner.scale = [s, s];
};

/// Create a new Stage
var stage = new pix.Stage();

// Create a simple entity
var ent = stage.createEntity(-1);
ent.origin = [0.5, 0.5];
ent.scale = [4.0, 4.0];
ent.rotation = 0.0;

// Create the game and register a state
var game = new pix.Game();
game.registerState("main", stage);

// Queue some assets for loading
pix.engine.assets.queueAsset("pix.png", "image");

// Setup our entity(es)
pix.engine.onload = function(assets) {
  ent.addComponent(new pix.Sprite(assets.get("pix.png")));
  ent.addComponent(new SimpleAnimation());
};

// Start the game
pix.engine.start(game);