Apple Game Frameworks and Technologies

Use Multiple Goals

The thing about AI and autonomy is that once you give an object a little freedom, it’s no longer subject to your direct commands. Instead, it’s designed to think and act on its own. Sure, you may give it a goal, and it will attempt to meet that goal, but you’re no longer the one in charge.

Earlier, you “asked” the monsters to wander around by giving them a goal. So far, so good. The next goal you have for them is to chase Val, but only if she has a set of keys.

Still inside the AgentComponent.swift file, locate the following line:

agent.behavior = GKBehavior(goal: wanderGoal, weight: 100)

and replace it with this one:

agent.behavior = GKBehavior(goals: [wanderGoal, interceptGoal],
                            andWeights: [100, 0])

Now, instead ...