code: @Override
  	public Point3d[] getVertices() {
  		Point3d[] octahedron = new Point3d[6];
  	    octahedron[0] = new Point3d(-cirumscribedRadius, 0, 0);
  	    octahedron[1] = new Point3d( cirumscribedRadius, 0, 0);
  	    octahedron[2] = new Point3d(0, -cirumscribedRadius, 0);
  	    octahedron[3] = new Point3d(0,  cirumscribedRadius, 0);
  	    octahedron[4] = new Point3d(0, 0, -cirumscribedRadius);
  	    octahedron[5] = new Point3d(0, 0,  cirumscribedRadius);
  
  		return octahedron;
  	}
docs: Returns the vertices of an n-fold polygon of given radius and center
  @param n
  @param radius
  @param center
  @return