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Crabking Mobbrain

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

Overview​

This brain component defines the behavior tree for the Crab King mob, a boss-entity in DST. It orchestrates high-priority survival behaviors (panic triggers), tactical platform abandonment, active combat via ChaseAndAttack, and navigation back to a remembered home position using Wander. It inherits from the base Brain class and is attached to the mob entity via inst:AddComponent("brain"). The brain relies on two external components: health to determine when the Crab King's platform is too damaged to remain on, and knownlocations to store and retrieve the home position used for wander navigation.

Dependencies & Tags​

  • Components used:
    • health: Reads currenthealth to evaluate platform integrity.
    • knownlocations: Calls GetLocation("home") for wander target and RememberLocation("home", ...) during initialization.
  • Tags: None identified.

Properties​

No public instance properties are initialized in the constructor beyond the base Brain functionality. The component uses local constants and internal state (self.bt) which are not exposed as public properties.

Main Functions​

CrabkingMobBrain:OnStart()​

  • Description: Constructs and assigns the behavior tree root node. This method is called automatically when the brain begins running. It defines a priority node with five sub-nodes evaluated in order: panic triggers (for fire/electric fence), a platform-abandonment check, combat engagement, and wander movement.
  • Parameters: None.
  • Returns: None. Initializes self.bt with the constructed behavior tree.

CrabkingMobBrain:OnInitializationComplete()​

  • Description: Registers the mob's current position as its "home" location in the knownlocations component. This point becomes the target for wander behavior during later gameplay.
  • Parameters: None.
  • Returns: None.

Events & Listeners​

None. This component does not register or fire any events directly. It operates entirely through behavior tree evaluation and component API calls.