s</span>.width / <span class="number">2</span>
        y: <span class="property">@dimensions</span>.height / <span class="number">2</span>
      startRadius: <span class="number">3</span>
      radiusFactor: <span class="number">1.5</span>
      steps: <span class="number">3</span>
      radius: <span class="literal">null</span>

    opts = Util.extend defaults, opts

    <span class="keyword">if</span> <span class="keyword">not</span> opts.radius
      opts.radius = <span class="keyword">if</span> <span cl