docs: @Pure
  	@Override
  	public Point3d getCenter() {
  		return new Point3d(
  				(this.medial1.getX() + this.medial2.getX()) / 2.,
  				(this.medial1.getY() + this.medial2.getY()) / 2.,
  				(this.medial1.getZ() + this.medial2.getZ()) / 2.);
  	}