Struct FrameTimer 

pub struct FrameTimer { /* private fields */ }

Frame time tracker for computing frame statistics.

Implementations

impl FrameTimer

pub const fn new() -> Self

Creates a new frame timer with default settings.

pub const fn with_fixed_dt(fixed_dt: f64) -> Self

Creates a frame timer with custom fixed timestep.

pub fn set_max_dt(&mut self, max_dt: f64)

Sets the maximum allowed delta time.

pub fn set_fixed_dt(&mut self, fixed_dt: f64)

Sets the fixed timestep interval.

pub fn update(&mut self, timestamp_ms: f64) -> f64

Updates the timer with a new frame timestamp.

Arguments

• timestamp_ms - Current timestamp from requestAnimationFrame in milliseconds

Returns

The clamped delta time in seconds

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

Consumes accumulated time in fixed timestep chunks.

Call this in a loop to run physics updates at fixed intervals:

while let Some(fixed_dt) = timer.consume_fixed_step() {
    physics.step(fixed_dt);
}

Returns

Some(fixed_dt) if enough time has accumulated, None otherwise

pub fn interpolation_alpha(&self) -> f64

Returns the interpolation alpha for rendering between physics steps.

This value (0.0 to 1.0) indicates how far between the last and next physics step we are, useful for interpolating visual positions.

pub const fn total_time(&self) -> f64

Returns the total elapsed time since the timer was created.

pub const fn frame_count(&self) -> u64

Returns the total number of frames processed.

pub fn average_fps(&self) -> f64

Returns the average frames per second.

pub const fn accumulator(&self) -> f64

Returns the remaining accumulator time.

pub const fn fixed_dt(&self) -> f64

Returns the fixed timestep interval.

pub fn reset(&mut self)

Resets the timer to its initial state.

Trait Implementations

impl Clone for FrameTimer

fn clone(&self) -> FrameTimer

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for FrameTimer

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for FrameTimer

fn default() -> Self

Returns the “default value” for a type.