Very nice. Linear algebra really is the bread & butter of game programming. Showing the theory alongside examples of how it's actually used to make games 'do

Very nice. Linear algebra really is the bread & butter of game programming. Showing the theory alongside examples of how it's actually used to make games 'do stuff' should be very helpful to those getting started. I could have really used a simple set of examples like this when I was first getting a sprite to flit about the screen. Keep them coming :)