CSC151 2010S, Class 32: Randomized (Unpredictable) Drawing

Overview:
* Final questions on the exam.
* Random art.
* The random procedure.
* Using randomness in making images.
* Simulation.

Admin:
* Reading for Monday (after break): Numeric Recursion.
* No surprises today.  Sorry.
* Have a great break.!
* CS Table Today: The Art of Computer Programming.

Questions on the Exam:
* Yes, I know that there's a lot more errata on the exam.  I'm behind in incorporating it.
* Close hues with wraparound
  * See whiteboard
* For the turtle one:
  * Assume the pen is down at the beginning and
    make sure that it's down at the end
  * But lift it up when you're moving and don't
    want to draw

Sam's claim: The history of art shows artists
experimenting with "randomness" - things beyond
their control
* Dada - An art movement near WWI reacting to the destructive capability of humanity
  * Make no sense, since the world does not make sense
  * Humans do things badly, so remove as much as possible of the human from the process of making art
* Note: You can get some interesting (and even artistic) stuff out of random processes

We're going to try to do the same thing in GIMP

We need a technique for randomness:
* (random N) - gives you an "unpredictable" number between 0 and N-1, inclusive