Controller::Activate

Called when a controller is activated by some kind of trigger.

virtual void Activate(Node *trigger, Node *activator = nullptr);

trigger	A pointer to the node that caused the controller to be activated. This can be nullptr.
activator	The node that activated the trigger. This can be nullptr.

The Activate function is called when some kind of trigger in the world causes a controller to be activated. This function can be called because a Trigger node was activated, or it can be called by a script. A controller subclass may perform whatever action is appropriate in response to the activation.

The default implementation performs no action, so any override of the Activate function does not need to call the base class counterpart. Controller::Deactivate

World::ActivateTriggers

Trigger