M 10/2

1. Review and finish general 3D rotation: http://www.ecse.rpi.edu/Homepages/wrf/Research/Short_Notes/rotation.html
2. 4D rotations (enrichment only)
   http://www.ecse.rpi.edu/Homepages/wrf/Research/Short_Notes/rotation4d.html
3. rotate.c - simplest program to rotate the object a little more with every redisplay.
4. Slide set 13 - OpenGL Transformations
5. my paper on quaternions
6. Hamilton's 1847 paper (for enrichment only),
7. smoothcolor.c - show difference between flat coloring and smooth coloring of a polygon.
   When you set the color, it applies to all future vertices until you change it.

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