Part of Lesson Plan: Splines and NURBS
Activity Overview / Details
Spline: A collection of points (vertices) that define the lines (linear,cury) between them. (They are 2 dimensional and do not render.) (Hold shift key to break handles.)
Use the power point presentation or the notes below to define NURBS and show the class examples.
NURBS: Non-Uniform Rational B-Spline. They are object generators; they allow you to create a 3D object from one or more splines.
Extrude NURBS: Pulling/stretching out a spline to create a 3D object...like cutting cookie dough with a cookie cutter.
Lathe NURBS: Takes a spline profile built on the Y-axis and rotates it around the axis...like a wood or metal lathe.
Loft NURBS: Lofting or skinning is like stretching a skin over two or more 2D profiles... like the ribs of a boat or airplane wing.
Sweep NURBS: Sweeping or path extrusion takes the cross section of an object and extrudes it along the path of another spline.
Materials / Resource
- NURBS [ Download ] Powerpoint presentation defining four types of NURBS with a short quiz at the end.