Struct TickPacer 

pub struct TickPacer { /* private fields */ }

Paces a fixed-rate tick loop against the wall clock, one pass at a time.

A frontend alternates between handling input and running the ticks that are due. Each pass reads the clock once and runs the ticks owed at that instant, however long they take to run; whatever falls due meanwhile waits for the next pass, after the frontend has handled the input that arrived in between — a key release, Esc, a resize. A pass that asked the clock again after every tick would keep finding another one due for as long as ticks run slower than real time (a heavy cart, an unoptimized build), and would never hand control back.

Implementations

impl TickPacer

pub fn new(now: Instant) -> Self

A pacer whose first tick is due at now.

pub fn tick_due(&mut self, now: Instant, frame: Duration) -> bool

Whether a tick is due by now, the instant the calling pass began, counting it as run if so.

A pass asks with the same now until the answer is false, running one tick per true. A pass still more than ten frames behind after its first tick drops the rest of the backlog rather than running it back to back: that tick is all it runs, and the next falls due a frame after now.

pub fn next_tick(&self) -> Instant

The instant the next tick falls due.