title: Scrollmagic duration
body: <p>Is there a way to set the scrollmagic duration on a scene as long as the height of the scene? I want to use the class toggles functionality and certain scenes are heigher than the viewport height.</p>
  
  <pre><code>&lt;section id="sec1"&gt;I'm 400px in height&lt;/section&gt;
  &lt;section id="sec1"&gt;I'm 100% in height (1 viewport)&lt;/section&gt;
  &lt;section id="sec1"&gt;I'm 2500px in height (2,2 viewports)&lt;/section&gt;
  </code></pre>
  
  <p>Duration in px: {duration: 400}</p>
  
  <p>Duration in vh: {duration: '100%'}</p>
  
  <p>Duration in element height: ???</p>
  
  <p>Thanks for helping!</p>