register Step
Registers a new trigger that runs in predictable intervals. (60 per second by default)
Passes through one argument:
Steps elapsed
Available modifications:
StepTrigger.setFps Sets the fps, i.e. how many times this trigger will fire per second
StepTrigger.setDelay Sets the delay in seconds, i.e. how many seconds it takes to fire. Overrides StepTrigger.setFps.
Trigger.setPriority Sets the priority
Return
The trigger for additional modification
Parameters
method
The method to call when the event is fired