Problem
1. Determine the blending functions for uniform, periodic B-spline curves for d = 6.
2. Write a program using forward differences to calculate points along a two-dimensional, uniform, periodic, cubic B-spline curve, given an input set of control points.
3. Write a routine to display any specified conic in the xy plane using a rational Bezier spline representation.
4. Write a routine to display any specified conic in the xy plane using a rational B-spline representation.