A Trip Down The Graphics PipleLine, Chapter 02. What, Teapots Again?
A Trip Down The Graphics PipleLine, Jim Blinn’s Corner
The Teapot
- In the January 1987 issue of IEEE Computer Graphics and Applications, Frank Crow published an article that gave the history of Martin Newell’s teapot. He also included a database as an unstructured list of Bezier surfaces. There is some structure to the teapot though, and it allows a much more compact representation. Here it is.
The Body
- The body of the teapot is a surface of revolution with an outline consisting of three Bezier curves in the xy plane. The surface is generated by rotating this outline curve about the y axis. The control point coordinates are
| point nbr | x | y |
|---|---|---|
| 1 | 1.4000 | 2.25000 |
| 2 | 1.3375 | 2.38125 |
| 3 | 1.4375 | 2.38125 |
| 4 | 1.5000 | 2.25000 |
| 5 | 1.7500 | 1.72500 |
| 6 | 2.0000 | 1.20000 |
| 7 | 2.0000 | 0.75000 |
| 8 | 2.0000 | 0.30000 |
| 9 | 1.5000 | 0.07500 |
| 10 | 1.5000 | 0.00000 |
Figure 2.1 Outline of the body
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image
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The