John Christensen

I was able to make it work by converting to a vrep using the `doubledescription` function: ```julia using Polyhedra, QHull cube = HalfSpace([0,0,1],1)∩HalfSpace([0,0,-1],0)∩HalfSpace([0,1,0],1)∩HalfSpace([0,-1,0],0)∩HalfSpace([1,0,0],1)∩HalfSpace([-1,0,0],0) vcube = doubledescription(cube) p = polyhedron(vcube,QHull.Library()) Polyhedra.volume(p)...

When I do this: ``` setobject!(vis[:box1], HyperRectangle(Vec(0., 0, 0), Vec(2, 0.1, 1))) setobject!(vis[:box2], HyperRectangle(Vec(0., 0, 0), Vec(0.1, 2, 1))) setvisible!(vis[:box1],false) setvisible!(vis[:box2],false) anim = Animation() atframe(anim, vis, 0) do frame setvisible!(vis[:box2],false)...