Struct FpsCounter

pub struct FpsCounter { /* private fields */ }

An accurate FPS counter, that remembers samples frame times in order to calculate the current FPS as accurratly as possible.

The frame sampler has a limited size, when it grows to big, the oldest frames are dropped. Frames that become outdated (frames that have been timed more than 5 seconds ago) are also dropped.

To count frames, the tick() method must be called repeatedly, to sample a frame.

Implementations

impl FpsCounter

pub fn new() -> FpsCounter

Create a new FPS counter.

pub fn tick(&mut self)

Tick/count a new frame, and report the FPS.

pub fn calculate_fps(&mut self) -> Option<f64>

Calculate the FPS based on the known frame times.

If we are unable to calculate the FPS, None is returned.

pub fn report_periodically(&mut self)

Report the FPS to the console periodically. By default this happens each second.

If this method is invoked but the FPS has been reported too recently, nothing happens.

pub fn report(&mut self)

Report the current FPS to the console.