Creating a simulated physics world

Our first task is to create a simulated physics world and put two objects inside it.

Prepare for lift off

In the index.html file, the core part is the game section. We have two canvas elements in this game. The debug-canvas element is for the Box2D engine and canvas is for the CreateJS library:

<section id="game" class="row">
    <canvas id="debug-canvas" width="480" height="360"></canvas>
    <canvas id="canvas" width="480" height="360"></canvas>
  </section>

We prepare a dedicated file for all the physics-related logic. We prepare the physics.js file with the following code:

;(function(game, cjs, b2d){
  // code here later
}).call(this, game, createjs, Box2D);

Engage thrusters

The following steps create the physics world as the foundation of the game:

1. The Box2D classes are put in different modules. We will need to reference some common classes as we go along. We use the following code to create an alias for these Box2D classes...