...In this chapter, we'll populate it with NPCs and Props. We'll introduce some new AI types to handle friendly or neutral NPCs...

...Very simple, and hopefully optimizes into quite a fast function! Now we go into ai/adjacent_ai_system.rs
. We'll modify the system to also...

...A future chapter is planned that will make NPC AI a lot smarter in general (and introduce more tactical options), so we'll save...