### 7.13.2 shapes_old.inc

`Ellipsoid, Sphere`
  Unit-radius sphere at the origin.
`Cylinder_X, Cylinder_Y, Cylinder_Z`
  Infinite cylinders.
`QCone_X, QCone_Y, QCone_Z`
  Infinite cones.
`Cone_X, Cone_Y, Cone_Z`
  Closed capped cones: unit-radius at -1 and 0 radius at +1 along each axis.
`Plane_YZ, Plane_XZ, Plane_XY`
  Infinite planes passing through the origin.
`Paraboloid_X, Paraboloid_Y, Paraboloid_Z`
  y^2 + z^2 - x = 0
`Hyperboloid, Hyperboloid_Y`
  y - x^2 + z^2 = 0
`UnitBox, Cube`
  A cube 2 units on each side, centered on the origin.
`Disk_X, Disk_Y, Disk_Z`
  "Capped" cylinders, with a radius of 1 unit and a length of 2 units, centered on the origin.