| Copyright 2001, softSurfer (www.softsurfer.com) | |
| This code may be freely used and modified for any purpose | |
| providing that this copyright notice is included with it. | |
| SoftSurfer makes no warranty for this code, and cannot be held | |
| liable for any real or imagined damage resulting from its use. | |
| Users of this code must verify correctness for their application. |