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Chesterbrain

Based on game build 714014 | Last updated: 2026-02-27

Overview​

The ChesterBrain component implements the behavior tree for Chester, a boss entity in Don't Starve Together. It coordinates high-level movement and decision-making logic through a priority-based behavior tree. The component inherits from the base Brain class and initializes a set of hierarchical behaviors—including following the player (via Follow), wandering near the "home" location (via Wander), facing the leader (FaceEntity), and triggering panic responses to electric fences or environmental danger (PanicTrigger, ElectricFencePanicTrigger). It relies on the follower and knownlocations components to resolve dynamic targets and locations at runtime.

Dependencies & Tags​

  • Components used:
    • follower — used to retrieve the current leader via GetLeader().
    • knownlocations — used to fetch the stored "home" location for wandering behavior.
  • Tags: None identified.

Properties​

PropertyTypeDefault ValueDescription
instEntitynil (inherited from Brain)The entity instance this brain controls. Passed via constructor.
btBTnil (initialized in OnStart)The behavior tree instance used to execute decision logic. Set during OnStart.

Main Functions​

ChesterBrain:OnStart()​

  • Description: Initializes the behavior tree root node with a prioritized sequence of behaviors. This method is called automatically when the brain becomes active.
  • Parameters: None.
  • Returns: nil.

Behavior Tree Nodes (Internally Used)​

The OnStart method constructs a PriorityNode root containing the following behaviors in order:

  • BrainCommon.PanicTrigger(self.inst) — triggers panic if health is critically low.
  • BrainCommon.ElectricFencePanicTrigger(self.inst) — triggers panic when near an active electric fence.
  • Follow(...) — moves toward the leader (retrieved via GetLeader) within specified distance bounds.
  • FaceEntity(...) — rotates the entity to face the current leader.
  • Wander(...) — moves randomly within a radius around the "home" location if no higher-priority behavior is active.

Events & Listeners​

None identified.