Usage
Select the Degree of the NURBS Curve. To add a new Point, click on
the Add Point button; this adds a Point at the end of the table.
Edit it by clicking on the Edit button. To delete a point, click on
the Delete button corresponding to that Point. Rotate the Camera by
using the Camera Angle slider. Modify the moving parameter point by
using the u value slider. You can also view the Knot Vector.