// RANDOM POINT IN A CUBE. Return a Vector3
 public Vector3 PointInACube(Normalization n, float t)
 {
     return(RandomCube.Volume(ref _rand, n, t));
 }
 // RANDOM POINT IN A CUBE. Return a Vector3
 public Vector3 PointInACube()
 {
     return(RandomCube.Volume(ref _rand));
 }