729 lines
27 KiB
Rust
729 lines
27 KiB
Rust
use bevy_ecs::{reflect::ReflectResource, system::Resource};
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use bevy_reflect::{FromReflect, Reflect};
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use bevy_utils::{Duration, Instant};
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/// A clock that tracks how much it has advanced (and how much real time has elapsed) since
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/// its previous update and since its creation.
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#[derive(Resource, Reflect, FromReflect, Debug, Clone)]
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#[reflect(Resource)]
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pub struct Time {
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startup: Instant,
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first_update: Option<Instant>,
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last_update: Option<Instant>,
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// pausing
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paused: bool,
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// scaling
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relative_speed: f64, // using `f64` instead of `f32` to minimize drift from rounding errors
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delta: Duration,
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delta_seconds: f32,
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delta_seconds_f64: f64,
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elapsed: Duration,
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elapsed_seconds: f32,
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elapsed_seconds_f64: f64,
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raw_delta: Duration,
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raw_delta_seconds: f32,
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raw_delta_seconds_f64: f64,
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raw_elapsed: Duration,
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raw_elapsed_seconds: f32,
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raw_elapsed_seconds_f64: f64,
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// wrapping
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wrap_period: Duration,
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elapsed_wrapped: Duration,
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elapsed_seconds_wrapped: f32,
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elapsed_seconds_wrapped_f64: f64,
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raw_elapsed_wrapped: Duration,
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raw_elapsed_seconds_wrapped: f32,
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raw_elapsed_seconds_wrapped_f64: f64,
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}
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impl Default for Time {
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fn default() -> Self {
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Self {
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startup: Instant::now(),
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first_update: None,
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last_update: None,
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paused: false,
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relative_speed: 1.0,
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delta: Duration::ZERO,
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delta_seconds: 0.0,
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delta_seconds_f64: 0.0,
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elapsed: Duration::ZERO,
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elapsed_seconds: 0.0,
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elapsed_seconds_f64: 0.0,
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raw_delta: Duration::ZERO,
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raw_delta_seconds: 0.0,
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raw_delta_seconds_f64: 0.0,
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raw_elapsed: Duration::ZERO,
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raw_elapsed_seconds: 0.0,
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raw_elapsed_seconds_f64: 0.0,
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wrap_period: Duration::from_secs(3600), // 1 hour
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elapsed_wrapped: Duration::ZERO,
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elapsed_seconds_wrapped: 0.0,
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elapsed_seconds_wrapped_f64: 0.0,
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raw_elapsed_wrapped: Duration::ZERO,
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raw_elapsed_seconds_wrapped: 0.0,
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raw_elapsed_seconds_wrapped_f64: 0.0,
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}
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}
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}
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impl Time {
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/// Constructs a new `Time` instance with a specific startup `Instant`.
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pub fn new(startup: Instant) -> Self {
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Self {
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startup,
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..Default::default()
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}
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}
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/// Updates the internal time measurements.
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///
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/// Calling this method as part of your app will most likely result in inaccurate timekeeping,
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/// as the `Time` resource is ordinarily managed by the [`TimePlugin`](crate::TimePlugin).
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pub fn update(&mut self) {
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let now = Instant::now();
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self.update_with_instant(now);
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}
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/// Updates time with a specified [`Instant`].
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///
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/// This method is provided for use in tests. Calling this method as part of your app will most
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/// likely result in inaccurate timekeeping, as the `Time` resource is ordinarily managed by the
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/// [`TimePlugin`](crate::TimePlugin).
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///
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/// # Examples
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///
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/// ```
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/// # use bevy_time::prelude::*;
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/// # use bevy_ecs::prelude::*;
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/// # use bevy_utils::Duration;
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/// # fn main () {
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/// # test_health_system();
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/// # }
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/// #[derive(Resource)]
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/// struct Health {
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/// // Health value between 0.0 and 1.0
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/// health_value: f32,
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/// }
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///
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/// fn health_system(time: Res<Time>, mut health: ResMut<Health>) {
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/// // Increase health value by 0.1 per second, independent of frame rate,
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/// // but not beyond 1.0
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/// health.health_value = (health.health_value + 0.1 * time.delta_seconds()).min(1.0);
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/// }
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///
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/// // Mock time in tests
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/// fn test_health_system() {
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/// let mut world = World::default();
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/// let mut time = Time::default();
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/// time.update();
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/// world.insert_resource(time);
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/// world.insert_resource(Health { health_value: 0.2 });
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///
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/// let mut update_stage = SystemStage::single_threaded();
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/// update_stage.add_system(health_system);
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///
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/// // Simulate that 30 ms have passed
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/// let mut time = world.resource_mut::<Time>();
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/// let last_update = time.last_update().unwrap();
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/// time.update_with_instant(last_update + Duration::from_millis(30));
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///
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/// // Run system
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/// update_stage.run(&mut world);
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///
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/// // Check that 0.003 has been added to the health value
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/// let expected_health_value = 0.2 + 0.1 * 0.03;
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/// let actual_health_value = world.resource::<Health>().health_value;
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/// assert_eq!(expected_health_value, actual_health_value);
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/// }
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/// ```
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pub fn update_with_instant(&mut self, instant: Instant) {
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let raw_delta = instant - self.last_update.unwrap_or(self.startup);
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let delta = if self.paused {
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Duration::ZERO
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} else if self.relative_speed != 1.0 {
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raw_delta.mul_f64(self.relative_speed)
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} else {
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// avoid rounding when at normal speed
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raw_delta
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};
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if self.last_update.is_some() {
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self.delta = delta;
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self.delta_seconds = self.delta.as_secs_f32();
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self.delta_seconds_f64 = self.delta.as_secs_f64();
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self.raw_delta = raw_delta;
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self.raw_delta_seconds = self.raw_delta.as_secs_f32();
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self.raw_delta_seconds_f64 = self.raw_delta.as_secs_f64();
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} else {
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self.first_update = Some(instant);
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}
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self.elapsed += delta;
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self.elapsed_seconds = self.elapsed.as_secs_f32();
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self.elapsed_seconds_f64 = self.elapsed.as_secs_f64();
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self.raw_elapsed += raw_delta;
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self.raw_elapsed_seconds = self.raw_elapsed.as_secs_f32();
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self.raw_elapsed_seconds_f64 = self.raw_elapsed.as_secs_f64();
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self.elapsed_wrapped = duration_div_rem(self.elapsed, self.wrap_period).1;
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self.elapsed_seconds_wrapped = self.elapsed_wrapped.as_secs_f32();
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self.elapsed_seconds_wrapped_f64 = self.elapsed_wrapped.as_secs_f64();
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self.raw_elapsed_wrapped = duration_div_rem(self.raw_elapsed, self.wrap_period).1;
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self.raw_elapsed_seconds_wrapped = self.raw_elapsed_wrapped.as_secs_f32();
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self.raw_elapsed_seconds_wrapped_f64 = self.raw_elapsed_wrapped.as_secs_f64();
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self.last_update = Some(instant);
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}
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/// Returns the [`Instant`] the clock was created.
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///
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/// This usually represents when the app was started.
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#[inline]
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pub fn startup(&self) -> Instant {
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self.startup
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}
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/// Returns the [`Instant`] when [`update`](#method.update) was first called, if it exists.
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///
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/// This usually represents when the first app update started.
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#[inline]
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pub fn first_update(&self) -> Option<Instant> {
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self.first_update
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}
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/// Returns the [`Instant`] when [`update`](#method.update) was last called, if it exists.
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///
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/// This usually represents when the current app update started.
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#[inline]
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pub fn last_update(&self) -> Option<Instant> {
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self.last_update
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}
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/// Returns how much time has advanced since the last [`update`](#method.update), as a [`Duration`].
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#[inline]
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pub fn delta(&self) -> Duration {
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self.delta
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}
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/// Returns how much time has advanced since the last [`update`](#method.update), as [`f32`] seconds.
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#[inline]
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pub fn delta_seconds(&self) -> f32 {
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self.delta_seconds
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}
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/// Returns how much time has advanced since the last [`update`](#method.update), as [`f64`] seconds.
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#[inline]
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pub fn delta_seconds_f64(&self) -> f64 {
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self.delta_seconds_f64
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}
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/// Returns how much time has advanced since [`startup`](#method.startup), as [`Duration`].
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#[inline]
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pub fn elapsed(&self) -> Duration {
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self.elapsed
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}
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/// Returns how much time has advanced since [`startup`](#method.startup), as [`f32`] seconds.
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///
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/// **Note:** This is a monotonically increasing value. It's precision will degrade over time.
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/// If you need an `f32` but that precision loss is unacceptable,
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/// use [`elapsed_seconds_wrapped`](#method.elapsed_seconds_wrapped).
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#[inline]
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pub fn elapsed_seconds(&self) -> f32 {
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self.elapsed_seconds
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}
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/// Returns how much time has advanced since [`startup`](#method.startup), as [`f64`] seconds.
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#[inline]
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pub fn elapsed_seconds_f64(&self) -> f64 {
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self.elapsed_seconds_f64
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}
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/// Returns how much time has advanced since [`startup`](#method.startup) modulo
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/// the [`wrap_period`](#method.wrap_period), as [`Duration`].
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#[inline]
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pub fn elapsed_wrapped(&self) -> Duration {
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self.elapsed_wrapped
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}
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/// Returns how much time has advanced since [`startup`](#method.startup) modulo
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/// the [`wrap_period`](#method.wrap_period), as [`f32`] seconds.
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///
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/// This method is intended for applications (e.g. shaders) that require an [`f32`] value but
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/// suffer from the gradual precision loss of [`elapsed_seconds`](#method.elapsed_seconds).
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#[inline]
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pub fn elapsed_seconds_wrapped(&self) -> f32 {
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self.elapsed_seconds_wrapped
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}
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/// Returns how much time has advanced since [`startup`](#method.startup) modulo
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/// the [`wrap_period`](#method.wrap_period), as [`f64`] seconds.
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#[inline]
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pub fn elapsed_seconds_wrapped_f64(&self) -> f64 {
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self.elapsed_seconds_wrapped_f64
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}
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/// Returns how much real time has elapsed since the last [`update`](#method.update), as a [`Duration`].
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#[inline]
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pub fn raw_delta(&self) -> Duration {
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self.raw_delta
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}
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/// Returns how much real time has elapsed since the last [`update`](#method.update), as [`f32`] seconds.
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#[inline]
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pub fn raw_delta_seconds(&self) -> f32 {
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self.raw_delta_seconds
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}
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/// Returns how much real time has elapsed since the last [`update`](#method.update), as [`f64`] seconds.
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#[inline]
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pub fn raw_delta_seconds_f64(&self) -> f64 {
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self.raw_delta_seconds_f64
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}
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/// Returns how much real time has elapsed since [`startup`](#method.startup), as [`Duration`].
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#[inline]
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pub fn raw_elapsed(&self) -> Duration {
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self.raw_elapsed
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}
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/// Returns how much real time has elapsed since [`startup`](#method.startup), as [`f32`] seconds.
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///
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/// **Note:** This is a monotonically increasing value. It's precision will degrade over time.
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/// If you need an `f32` but that precision loss is unacceptable,
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/// use [`raw_elapsed_seconds_wrapped`](#method.raw_elapsed_seconds_wrapped).
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#[inline]
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pub fn raw_elapsed_seconds(&self) -> f32 {
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self.raw_elapsed_seconds
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}
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/// Returns how much real time has elapsed since [`startup`](#method.startup), as [`f64`] seconds.
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#[inline]
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pub fn raw_elapsed_seconds_f64(&self) -> f64 {
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self.raw_elapsed_seconds_f64
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}
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/// Returns how much real time has elapsed since [`startup`](#method.startup) modulo
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/// the [`wrap_period`](#method.wrap_period), as [`Duration`].
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#[inline]
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pub fn raw_elapsed_wrapped(&self) -> Duration {
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self.raw_elapsed_wrapped
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}
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/// Returns how much real time has elapsed since [`startup`](#method.startup) modulo
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/// the [`wrap_period`](#method.wrap_period), as [`f32`] seconds.
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///
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/// This method is intended for applications (e.g. shaders) that require an [`f32`] value but
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/// suffer from the gradual precision loss of [`raw_elapsed_seconds`](#method.raw_elapsed_seconds).
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#[inline]
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pub fn raw_elapsed_seconds_wrapped(&self) -> f32 {
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self.raw_elapsed_seconds_wrapped
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}
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/// Returns how much real time has elapsed since [`startup`](#method.startup) modulo
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/// the [`wrap_period`](#method.wrap_period), as [`f64`] seconds.
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#[inline]
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pub fn raw_elapsed_seconds_wrapped_f64(&self) -> f64 {
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self.raw_elapsed_seconds_wrapped_f64
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}
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/// Returns the modulus used to calculate [`elapsed_wrapped`](#method.elapsed_wrapped) and
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/// [`raw_elapsed_wrapped`](#method.raw_elapsed_wrapped).
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///
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/// **Note:** The default modulus is one hour.
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#[inline]
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pub fn wrap_period(&self) -> Duration {
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self.wrap_period
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}
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/// Sets the modulus used to calculate [`elapsed_wrapped`](#method.elapsed_wrapped) and
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/// [`raw_elapsed_wrapped`](#method.raw_elapsed_wrapped).
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///
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/// **Note:** This will not take effect until the next update.
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///
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/// # Panics
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///
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/// Panics if `wrap_period` is a zero-length duration.
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#[inline]
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pub fn set_wrap_period(&mut self, wrap_period: Duration) {
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assert!(!wrap_period.is_zero(), "division by zero");
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self.wrap_period = wrap_period;
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}
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/// Returns the speed the clock advances relative to your system clock, as [`f32`].
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/// This is known as "time scaling" or "time dilation" in other engines.
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///
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/// **Note:** This function will return zero when time is paused.
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#[inline]
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pub fn relative_speed(&self) -> f32 {
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self.relative_speed_f64() as f32
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}
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/// Returns the speed the clock advances relative to your system clock, as [`f64`].
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/// This is known as "time scaling" or "time dilation" in other engines.
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///
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/// **Note:** This function will return zero when time is paused.
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#[inline]
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pub fn relative_speed_f64(&self) -> f64 {
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if self.paused {
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0.0
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} else {
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self.relative_speed
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}
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}
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/// Sets the speed the clock advances relative to your system clock, given as an [`f32`].
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///
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/// For example, setting this to `2.0` will make the clock advance twice as fast as your system clock.
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///
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/// **Note:** This does not affect the `raw_*` measurements.
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///
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/// # Panics
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///
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/// Panics if `ratio` is negative or not finite.
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#[inline]
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pub fn set_relative_speed(&mut self, ratio: f32) {
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self.set_relative_speed_f64(ratio as f64);
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}
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/// Sets the speed the clock advances relative to your system clock, given as an [`f64`].
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///
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/// For example, setting this to `2.0` will make the clock advance twice as fast as your system clock.
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///
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/// **Note:** This does not affect the `raw_*` measurements.
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///
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/// # Panics
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///
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/// Panics if `ratio` is negative or not finite.
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#[inline]
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pub fn set_relative_speed_f64(&mut self, ratio: f64) {
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assert!(ratio.is_finite(), "tried to go infinitely fast");
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assert!(ratio.is_sign_positive(), "tried to go back in time");
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self.relative_speed = ratio;
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}
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/// Stops the clock, preventing it from advancing until resumed.
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///
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/// **Note:** This does affect the `raw_*` measurements.
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#[inline]
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pub fn pause(&mut self) {
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self.paused = true;
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}
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/// Resumes the clock if paused.
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#[inline]
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pub fn unpause(&mut self) {
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self.paused = false;
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}
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/// Returns `true` if the clock is currently paused.
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#[inline]
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pub fn is_paused(&self) -> bool {
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self.paused
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}
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}
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fn duration_div_rem(dividend: Duration, divisor: Duration) -> (u32, Duration) {
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// `Duration` does not have a built-in modulo operation
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let quotient = (dividend.as_nanos() / divisor.as_nanos()) as u32;
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let remainder = dividend - (quotient * divisor);
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(quotient, remainder)
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}
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#[cfg(test)]
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#[allow(clippy::float_cmp)]
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mod tests {
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use super::Time;
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use bevy_utils::{Duration, Instant};
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fn assert_float_eq(a: f32, b: f32) {
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assert!((a - b).abs() <= f32::EPSILON, "{a} != {b}");
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}
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#[test]
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fn update_test() {
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let start_instant = Instant::now();
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let mut time = Time::new(start_instant);
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// Ensure `time` was constructed correctly.
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assert_eq!(time.startup(), start_instant);
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assert_eq!(time.first_update(), None);
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assert_eq!(time.last_update(), None);
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assert_eq!(time.relative_speed(), 1.0);
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assert_eq!(time.delta(), Duration::ZERO);
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assert_eq!(time.delta_seconds(), 0.0);
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assert_eq!(time.delta_seconds_f64(), 0.0);
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assert_eq!(time.raw_delta(), Duration::ZERO);
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assert_eq!(time.raw_delta_seconds(), 0.0);
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assert_eq!(time.raw_delta_seconds_f64(), 0.0);
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assert_eq!(time.elapsed(), Duration::ZERO);
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assert_eq!(time.elapsed_seconds(), 0.0);
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assert_eq!(time.elapsed_seconds_f64(), 0.0);
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assert_eq!(time.raw_elapsed(), Duration::ZERO);
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assert_eq!(time.raw_elapsed_seconds(), 0.0);
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assert_eq!(time.raw_elapsed_seconds_f64(), 0.0);
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// Update `time` and check results.
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// The first update to `time` normally happens before other systems have run,
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// so the first delta doesn't appear until the second update.
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let first_update_instant = Instant::now();
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time.update_with_instant(first_update_instant);
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assert_eq!(time.startup(), start_instant);
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assert_eq!(time.first_update(), Some(first_update_instant));
|
|
assert_eq!(time.last_update(), Some(first_update_instant));
|
|
assert_eq!(time.relative_speed(), 1.0);
|
|
assert_eq!(time.delta(), Duration::ZERO);
|
|
assert_eq!(time.delta_seconds(), 0.0);
|
|
assert_eq!(time.delta_seconds_f64(), 0.0);
|
|
assert_eq!(time.raw_delta(), Duration::ZERO);
|
|
assert_eq!(time.raw_delta_seconds(), 0.0);
|
|
assert_eq!(time.raw_delta_seconds_f64(), 0.0);
|
|
assert_eq!(time.elapsed(), first_update_instant - start_instant,);
|
|
assert_eq!(
|
|
time.elapsed_seconds(),
|
|
(first_update_instant - start_instant).as_secs_f32(),
|
|
);
|
|
assert_eq!(
|
|
time.elapsed_seconds_f64(),
|
|
(first_update_instant - start_instant).as_secs_f64(),
|
|
);
|
|
assert_eq!(time.raw_elapsed(), first_update_instant - start_instant,);
|
|
assert_eq!(
|
|
time.raw_elapsed_seconds(),
|
|
(first_update_instant - start_instant).as_secs_f32(),
|
|
);
|
|
assert_eq!(
|
|
time.raw_elapsed_seconds_f64(),
|
|
(first_update_instant - start_instant).as_secs_f64(),
|
|
);
|
|
|
|
// Update `time` again and check results.
|
|
// At this point its safe to use time.delta().
|
|
let second_update_instant = Instant::now();
|
|
time.update_with_instant(second_update_instant);
|
|
assert_eq!(time.startup(), start_instant);
|
|
assert_eq!(time.first_update(), Some(first_update_instant));
|
|
assert_eq!(time.last_update(), Some(second_update_instant));
|
|
assert_eq!(time.relative_speed(), 1.0);
|
|
assert_eq!(time.delta(), second_update_instant - first_update_instant);
|
|
assert_eq!(
|
|
time.delta_seconds(),
|
|
(second_update_instant - first_update_instant).as_secs_f32(),
|
|
);
|
|
assert_eq!(
|
|
time.delta_seconds_f64(),
|
|
(second_update_instant - first_update_instant).as_secs_f64(),
|
|
);
|
|
assert_eq!(
|
|
time.raw_delta(),
|
|
second_update_instant - first_update_instant,
|
|
);
|
|
assert_eq!(
|
|
time.raw_delta_seconds(),
|
|
(second_update_instant - first_update_instant).as_secs_f32(),
|
|
);
|
|
assert_eq!(
|
|
time.raw_delta_seconds_f64(),
|
|
(second_update_instant - first_update_instant).as_secs_f64(),
|
|
);
|
|
assert_eq!(time.elapsed(), second_update_instant - start_instant,);
|
|
assert_eq!(
|
|
time.elapsed_seconds(),
|
|
(second_update_instant - start_instant).as_secs_f32(),
|
|
);
|
|
assert_eq!(
|
|
time.elapsed_seconds_f64(),
|
|
(second_update_instant - start_instant).as_secs_f64(),
|
|
);
|
|
assert_eq!(time.raw_elapsed(), second_update_instant - start_instant,);
|
|
assert_eq!(
|
|
time.raw_elapsed_seconds(),
|
|
(second_update_instant - start_instant).as_secs_f32(),
|
|
);
|
|
assert_eq!(
|
|
time.raw_elapsed_seconds_f64(),
|
|
(second_update_instant - start_instant).as_secs_f64(),
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn wrapping_test() {
|
|
let start_instant = Instant::now();
|
|
|
|
let mut time = Time {
|
|
startup: start_instant,
|
|
wrap_period: Duration::from_secs(3),
|
|
..Default::default()
|
|
};
|
|
|
|
assert_eq!(time.elapsed_seconds_wrapped(), 0.0);
|
|
|
|
time.update_with_instant(start_instant + Duration::from_secs(1));
|
|
assert_float_eq(time.elapsed_seconds_wrapped(), 1.0);
|
|
|
|
time.update_with_instant(start_instant + Duration::from_secs(2));
|
|
assert_float_eq(time.elapsed_seconds_wrapped(), 2.0);
|
|
|
|
time.update_with_instant(start_instant + Duration::from_secs(3));
|
|
assert_float_eq(time.elapsed_seconds_wrapped(), 0.0);
|
|
|
|
time.update_with_instant(start_instant + Duration::from_secs(4));
|
|
assert_float_eq(time.elapsed_seconds_wrapped(), 1.0);
|
|
}
|
|
|
|
#[test]
|
|
fn relative_speed_test() {
|
|
let start_instant = Instant::now();
|
|
let mut time = Time::new(start_instant);
|
|
|
|
let first_update_instant = Instant::now();
|
|
time.update_with_instant(first_update_instant);
|
|
|
|
// Update `time` again and check results.
|
|
// At this point its safe to use time.delta().
|
|
let second_update_instant = Instant::now();
|
|
time.update_with_instant(second_update_instant);
|
|
assert_eq!(time.startup(), start_instant);
|
|
assert_eq!(time.first_update(), Some(first_update_instant));
|
|
assert_eq!(time.last_update(), Some(second_update_instant));
|
|
assert_eq!(time.relative_speed(), 1.0);
|
|
assert_eq!(time.delta(), second_update_instant - first_update_instant);
|
|
assert_eq!(
|
|
time.delta_seconds(),
|
|
(second_update_instant - first_update_instant).as_secs_f32(),
|
|
);
|
|
assert_eq!(
|
|
time.delta_seconds_f64(),
|
|
(second_update_instant - first_update_instant).as_secs_f64(),
|
|
);
|
|
assert_eq!(
|
|
time.raw_delta(),
|
|
second_update_instant - first_update_instant,
|
|
);
|
|
assert_eq!(
|
|
time.raw_delta_seconds(),
|
|
(second_update_instant - first_update_instant).as_secs_f32(),
|
|
);
|
|
assert_eq!(
|
|
time.raw_delta_seconds_f64(),
|
|
(second_update_instant - first_update_instant).as_secs_f64(),
|
|
);
|
|
assert_eq!(time.elapsed(), second_update_instant - start_instant,);
|
|
assert_eq!(
|
|
time.elapsed_seconds(),
|
|
(second_update_instant - start_instant).as_secs_f32(),
|
|
);
|
|
assert_eq!(
|
|
time.elapsed_seconds_f64(),
|
|
(second_update_instant - start_instant).as_secs_f64(),
|
|
);
|
|
assert_eq!(time.raw_elapsed(), second_update_instant - start_instant,);
|
|
assert_eq!(
|
|
time.raw_elapsed_seconds(),
|
|
(second_update_instant - start_instant).as_secs_f32(),
|
|
);
|
|
assert_eq!(
|
|
time.raw_elapsed_seconds_f64(),
|
|
(second_update_instant - start_instant).as_secs_f64(),
|
|
);
|
|
|
|
// Make app time advance at 2x the rate of your system clock.
|
|
time.set_relative_speed(2.0);
|
|
|
|
// Update `time` again 1 second later.
|
|
let elapsed = Duration::from_secs(1);
|
|
let third_update_instant = second_update_instant + elapsed;
|
|
time.update_with_instant(third_update_instant);
|
|
|
|
// Since app is advancing 2x your system clock, expect time
|
|
// to have advanced by twice the amount of real time elapsed.
|
|
assert_eq!(time.startup(), start_instant);
|
|
assert_eq!(time.first_update(), Some(first_update_instant));
|
|
assert_eq!(time.last_update(), Some(third_update_instant));
|
|
assert_eq!(time.relative_speed(), 2.0);
|
|
assert_eq!(time.delta(), elapsed.mul_f32(2.0));
|
|
assert_eq!(time.delta_seconds(), elapsed.mul_f32(2.0).as_secs_f32());
|
|
assert_eq!(time.delta_seconds_f64(), elapsed.mul_f32(2.0).as_secs_f64());
|
|
assert_eq!(time.raw_delta(), elapsed);
|
|
assert_eq!(time.raw_delta_seconds(), elapsed.as_secs_f32());
|
|
assert_eq!(time.raw_delta_seconds_f64(), elapsed.as_secs_f64());
|
|
assert_eq!(
|
|
time.elapsed(),
|
|
second_update_instant - start_instant + elapsed.mul_f32(2.0),
|
|
);
|
|
assert_eq!(
|
|
time.elapsed_seconds(),
|
|
(second_update_instant - start_instant + elapsed.mul_f32(2.0)).as_secs_f32(),
|
|
);
|
|
assert_eq!(
|
|
time.elapsed_seconds_f64(),
|
|
(second_update_instant - start_instant + elapsed.mul_f32(2.0)).as_secs_f64(),
|
|
);
|
|
assert_eq!(
|
|
time.raw_elapsed(),
|
|
second_update_instant - start_instant + elapsed,
|
|
);
|
|
assert_eq!(
|
|
time.raw_elapsed_seconds(),
|
|
(second_update_instant - start_instant + elapsed).as_secs_f32(),
|
|
);
|
|
assert_eq!(
|
|
time.raw_elapsed_seconds_f64(),
|
|
(second_update_instant - start_instant + elapsed).as_secs_f64(),
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn pause_test() {
|
|
let start_instant = Instant::now();
|
|
let mut time = Time::new(start_instant);
|
|
|
|
let first_update_instant = Instant::now();
|
|
time.update_with_instant(first_update_instant);
|
|
|
|
assert!(!time.is_paused());
|
|
assert_eq!(time.relative_speed(), 1.0);
|
|
|
|
time.pause();
|
|
|
|
assert!(time.is_paused());
|
|
assert_eq!(time.relative_speed(), 0.0);
|
|
|
|
let second_update_instant = Instant::now();
|
|
time.update_with_instant(second_update_instant);
|
|
assert_eq!(time.startup(), start_instant);
|
|
assert_eq!(time.first_update(), Some(first_update_instant));
|
|
assert_eq!(time.last_update(), Some(second_update_instant));
|
|
assert_eq!(time.delta(), Duration::ZERO);
|
|
assert_eq!(
|
|
time.raw_delta(),
|
|
second_update_instant - first_update_instant,
|
|
);
|
|
assert_eq!(time.elapsed(), first_update_instant - start_instant);
|
|
assert_eq!(time.raw_elapsed(), second_update_instant - start_instant);
|
|
|
|
time.unpause();
|
|
|
|
assert!(!time.is_paused());
|
|
assert_eq!(time.relative_speed(), 1.0);
|
|
|
|
let third_update_instant = Instant::now();
|
|
time.update_with_instant(third_update_instant);
|
|
assert_eq!(time.startup(), start_instant);
|
|
assert_eq!(time.first_update(), Some(first_update_instant));
|
|
assert_eq!(time.last_update(), Some(third_update_instant));
|
|
assert_eq!(time.delta(), third_update_instant - second_update_instant);
|
|
assert_eq!(
|
|
time.raw_delta(),
|
|
third_update_instant - second_update_instant,
|
|
);
|
|
assert_eq!(
|
|
time.elapsed(),
|
|
(third_update_instant - second_update_instant) + (first_update_instant - start_instant),
|
|
);
|
|
assert_eq!(time.raw_elapsed(), third_update_instant - start_instant);
|
|
}
|
|
}
|