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Fruitflybrain

Based on game build 714014 | Last updated: 2026-03-03

Overview​

Fruitflybrain implements the AI behavior tree for fruit fly entities in DST. It determines how the entity moves, identifies and targets plants, sows weeds on suitable soil, and — for lord fruit flies — summons minions and evades while attacking. It relies heavily on the combat, follower, leader, and knownlocations components to coordinate actions.

Usage example​

local inst = CreateEntity()
inst:AddComponent("combat")
inst:AddComponent("follower")
inst:AddComponent("knownlocations")
inst:AddTag("fruitfly") -- or "lordfruitfly"
inst.components.fruitflybrain = FruitflyBrain(inst)
inst:PushEvent("brainstart")

Dependencies & tags​

Components used: combat, follower, leader, knownlocations Tags: Checks for fruitfly or lordfruitfly to branch behavior; no tags added/removed by this brain itself.

Properties​

No public properties.

Main functions​

OnStart()​

  • Description: Initializes and starts the behavior tree. Constructs different branches based on whether the entity has the lordfruitfly tag, ordering high-priority logic (panic, home return, farming, wandering).
  • Parameters: None.
  • Returns: Nothing.
  • Error states: Assumes required components (combat, follower, leader, knownlocations) are present; failure to meet this will cause runtime errors.

Events & listeners​

  • Listens to: None. This is a behavior tree brain and does not register event listeners directly.
  • Pushes: None directly. Behavior tree actions may trigger events via ActionNode (e.g., self.inst.sg:GoToState("buzz")), but these are state graph transitions, not component-level events.