Zombie flocking AI for a prototype I'm playing with. Amazing how simple rulesets can give such emergent behaviour!
Each zombie has a set of weights between 0-1:
- walk toward where nearby zombies are walking toward (average)
- turn left/right based on which area is more open (obstacle avoidance)
- keep walking in the direction you're walking
Toss in some random mutations to each zombie's weight on each value and you get surprisingly complex results! I usually see one or two big hordes that form, with smaller groups of 2-4, and a few lone wolves here and there. Collisions between groups results in either group fragmentation /w new groups being formed, or the smaller group sometimes get absorbed into an even bigger horde!