Few things in nature is as impressive as how some animals seems to be able to organize themselves into larger groups so effortlessly. By learning more about this fascinating be- haviour we might be able to apply this knowledge to find new solutions to our own problems.
One of the first stepping stones to get to an under- standing of flocking behaviour is to be able to simulate it. The first flocking-behavior simulation was done on a com- puter by Craig Reynolds in 1986 he called his simulation program: "Boids". It's still to this day to most used model for simulating flocking behaviour.
This thesis attempts to compare two different defini- tions of the neighbourhood of the boids. The definition of the neighbourhood has great effect of how the boids act.