API reference

InteractivityInputSystem Class

Extends SystemBase

Modifiers: final

System that bridges ECS input events to KHR_interactivity behavior graphs.

For each entity with an InteractivityInput component, this system attaches an InputListener to the entity's SceneObject. When click events arrive, it calls SceneObject.fireInteractivityEvent with the appropriate event key and glTF node index from the hit info.

Signature

class InteractivityInputSystem : SystemBase

Constructors

InteractivityInputSystem ()

Signature

constructor()

Returns

InteractivityInputSystem

Properties

executeCount : Long

[Get]

The number of times this system's SystemBase.execute method has been called by the system manager. Incremented automatically before each execution cycle. Useful for performance monitoring.

@Volatile guarantees atomic 64-bit reads + happens-before semantics so the introspection reader (which runs on the dump caller's thread) observes a consistent value. Only SystemBase.incrementExecuteCount writes this field, so the non-atomic read-modify-write is safe.

associateSystemManager ( systemManager )	Associates this system with a SystemManager. Called during registration. Throws RuntimeException if the system is already associated — each system instance can only belong to one manager. Signature fun associateSystemManager(systemManager: SystemManager) Parameters `systemManager: SystemManager` The system manager that will own and execute this system.
delete ( entity )	Called when an entity is removed from the scene. Override to clean up any per-entity state this system maintains, such as cached components, tracking maps, or native resource handles. Signature open override fun delete(entity: Entity) Parameters `entity: Entity`
destroy ()	Called during system shutdown to release all resources held by this system. Override to dispose of native handles, close streams, and clear any global state accumulated during the session. Subclasses must call `super.destroy()` so the framework can clean up auto-registered introspection nodes. Signature open fun destroy()
execute ()	Called each frame by the SystemManager to perform this system's per-tick logic. Override to query entities with relevant components and apply updates. Signature open override fun execute()
getDependencies ()	Returns the execution ordering dependencies for this system. Override to declare which other systems must run before or after this one using SystemDependencies. Signature open fun getDependencies(): SystemDependencies? Returns `SystemDependencies?` The dependency configuration, or null if this system has no ordering constraints.
getScene ()	Returns the Scene that this system operates within. Delegates to the associated SystemManager to retrieve the active scene instance. Signature fun getScene(): Scene Returns `Scene` The scene containing the entities and rendering state for this system.

InteractivityInputSystem Class

Signature

Constructors

Properties

Methods