title: Create Quadrilateral frustum out of 8 points in 3D
body: <p>I've the following question:
  Given a set of 8 unique points in 3D I need to create a quadrilateral frustrum
  (<a href="https://en.wikipedia.org/wiki/Hexahedron#/media/File:Usech_kvadrat_piramid.png" rel="nofollow noreferrer">https://en.wikipedia.org/wiki/Hexahedron#/media/File:Usech_kvadrat_piramid.png</a>).
  By this I mean I need calculate the faces of the quadrilateral frustrum.</p>
  
  <p>My first idea was to calculate the convex hull of the point set, this should
  give me the faces which I need. I think this should work, but probably there is
  a much better way to do this.</p>
  
  <p><a href="https://i.stack.imgur.com/9K0n7.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/9K0n7.png" alt="8 points, need to find the quadrilateral faces"></a></p>
  
  <p>Thanks for your time.</p>
  
  <p>Best,
  S.</p>