### Description
This demo displays level of a vtkOBBTree using a slider. An OBBTree is an [Oriented Bounding Box Tree](https://en.wikipedia.org/wiki/Bounding_volume). It is used in fast intersection tests, collision detection.

Here's he embeded video:
<br>
<iframe width="256" src="https://www.youtube.com/embed/dHt6v1MjMhE" frameborder="0" allow="accelerometer; loop; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

!!! seealso
    [VisualizeKDTree](../VisualizeKDTree) and [VisualizeModifiedBSPTree](../VisualizeModifiedBSPTree).
