AI Game Behavior Tree's

gistfile1.cs

public static class Behavior
{
    //Branch
    public static Action Selector(Func<bool> cond, Action ifTrue, Action ifFalse) {
        return () => { if (cond()) { ifTrue(); } else { ifFalse(); } };
        }
    public static Action Sequencer(Action a, Action b) {
          return () => { a(); b(); }
        }

    //Example trees
    public static Func<bool> ifPlayerIsInSight = () => { return true; /*...true iff WorldState shows guard can see player...*/};

    public static Action shootAtPlayer = () => { /*...aim guard's weapon at player and fire...*/ };

    public static Func<bool> ifUnderFire = () => { return true; /*...true iff WorldState shows guard hears player gunfire...*/};

    public static Action takeCover = () => { /*...guard runs for nearest shelter... */};

    public static Action walkBackAndForthGuardingDoorway = () => { /*...default guard patrol behaviour...*/ };

    public static Action patrollingGuardBehaviour =
      Selector(Behavior.ifPlayerIsInSight, Behavior.shootAtPlayer,
        Selector(Behavior.ifUnderFire, Behavior.takeCover,
          Behavior.walkBackAndForthGuardingDoorway));
}