1. Simple Techniques for Coordinated Behavior
Presentation by Jonathan Martin
Based on Chapter 3.2 of AI Game Programming Wisdom 2, by Jeff Orkin

2. Tactical Espionage Action
Let’s continue the example from the last section
Our agents use a simple pathfinding scheme (most likely A*)
We do not have enough resources for a group behavior layer

3. Let’s see what happens 1 1
To avoid this, we can let agents “reserve” a path node
When a node is reserved, set its cost to something very high, so other agents will have to find another way 1 1 1

4. Let’s see what happens
Now we have the illusion of group behavior without a separate layer! 1 1 1
RESERVED 50 1 1

5. Get Out of My Way!
Now that we’ve surrounded the player, we want to shoot him without shooting each other
This can be done very simply
on (fire) {
if we have line of sight, fire!
else if obstructing object is an ally, ask him to move!
if ally is busy, or obstruction is not an ally, move! }
Adding audio cues adds to realism