ow the bottom of <code>b2</code>.</li>
</ol>

            </div>
            
            <div class="content"><div class='highlight'><pre>  <span class="hljs-keyword">var</span> colliding = <span class="hljs-function"><span class="hljs-keyword">function</span><span class="hljs-params">(b1, b2)</span> </span>{
    <span class="hljs-keyword">return</span> !(
      b1 === b2 ||
        b1.center.x + b1.size.x / <span class="hljs-number">2</span> &lt; b2.center.x - b2.size.x / <span class="hljs-number">2</span