Function bevy::ecs::schedule::apply_state_transition

pub fn apply_state_transition<S>(world: &mut World)
where
    S: States,

If a new state is queued in NextState<S>, this system:

• Takes the new state value from NextState<S> and updates State<S>.
• Sends a relevant StateTransitionEvent
• Runs the [OnExit(exited_state)] schedule, if it exists.
• Runs the OnTransition { from: exited_state, to: entered_state }, if it exists.
• Runs the [OnEnter(entered_state)] schedule, if it exists.