API reference

GrabbableSystem Class

Extends SystemBase

Modifiers: final

DeprecatedThis system is deprecated and has been replaced by IsdkSystem. To use this system instead, change the inputSystemType argument on VrFeature.

GrabbableSystem is a System that allows for grabbing of objects in the scene. It is responsible for detecting when an object is grabbed and then updating the object's position and rotation to match the grabber's position and rotation. It also handles the release of the object when the grabber releases it.

This System comes default with Meta Spatial SDK and operates on entities with Grabbable components. It interacts with Controller components to detect grab inputs and can affect Followable components by disabling them during grabs.

active : Boolean [Get][Set]	Signature var active: Boolean
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. Signature var executeCount: Long
grabButtons : Int [Get][Set]	The default is just grabbing with the grip buttons. You can change the grab buttons by accessing the grabButtons variable of the GrabbableSystem: Example: systemManager.findSystem<GrabbableSystem>().grabButtons = (ButtonBits.ButtonSqueezeR or ButtonBits.ButtonSqueezeL or ButtonBits.ButtonX) Signature var grabButtons: Int
systemManager : SystemManager [Get][Set]	The SystemManager that this system is registered with. Provides access to other systems and the scene. Initialized during system registration. Signature lateinit var systemManager: SystemManager

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.

GrabbableSystem Class

Signature

Constructors

Properties

Methods