The Scene Systems Pre Update Event.
This event is dispatched by a Scene during the main game loop step.
The event flow for a single step of a Scene is as follows:
Listen to it from a Scene using
A Scene will only run its step if it is active.
A reference to the Scene Systems class of the Scene that emitted this event.
The current time. Either a High Resolution Timer value if it comes from Request Animation Frame, or Date.now if using SetTimeout.
The delta time in ms since the last frame. This is a smoothed and capped value based on the FPS rate.