### Description
This demo displays the level of a vtkKdTree using a slider. A KdTree is an [k-d tree](https://en.wikipedia.org/wiki/K-d_tree). It is used in fast intersection tests, collision detection and point location.

Here's the embedded video:
<br>
<iframe width="256" src="https://www.youtube.com/embed/tfpb-2aBiyk" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>a

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