Morning: Computer graphics. More about texturing and texture interpolation and mapping.
Afternoon: Algorithms II. A little bit about spae efficient cuckoo hashing again and then external algorithms, which I found very interesting because it turns out you can use the same algorithms you usually use for doing things with data sets that do not fit in RAM so you have to have parts on the hard disk, to write algorithms that use the cache a lot better, and actually get measurable improvements even though you are using a pretty complex data structure!