Interactively computes a tie point file for transforming the given object
      onto the target object.
      When finished WlzBasisFnTiePoints prints the tie points to the
      standard output in a format suitable for input to
      WlzBasisFnTransformObj(1).
      Options:
      -g Use Gaussian basis function.
      -q Use multi-quadric basis function.
      -s Use thin plate spline basis function (default).
      -y Use polynomianl basis function with order = 3.
      Example:
      WlzBasisFnTiePoints test0.wlz test1.wlz >test.tie
      WlzBasisFnTransformObj -p test.tie test1.wlz >out.wlz
      This will compute a set of tie points and then use the ties points to
      apply a thin plate spline basis function transform to test1.wlz so that
      out.wlz matches test0.wlz.