title: Creating a scene graph / hierarchy using an entity component system
body: <p>I do not seem to find any good resources on how to organize entities from an ecs into a scene graph / hierarchical structure e.g. for a 3D editor.</p>
  <p>Im talking about something like:</p>
  <pre><code>-root
    -player
      -left-arm
      -right-arm
    -tree
      -branch
  </code></pre>
  <p>Could you give me a design example or maybe link some resource that explains how I could achieve this?</p>