CSE 477 G. Farin
HW 4, due 11/16 , 11:59 pm

B-Spline Curves

Let a cubic B-spline curve have the knot sequence

0,0,0,0,1, 1.5, 2,2,2,2 (Mathematica end knot multiplicities)

Design 2D control points such that you have a  B-spline curve defined over this knot sequence. Display the contol polygon, control points, and curve.
Using Manipulate, 
let u trace out the domain. Plot the moving point x(u) on the curve. 

Extra credit: Repeat for 3D.