1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206
#[cfg(feature = "bevy_reflect")]
use bevy_reflect::{prelude::*, Reflect};
use bevy_utils::Duration;
/// A Stopwatch is a struct that track elapsed time when started.
///
/// Note that in order to advance the stopwatch [`tick`](Stopwatch::tick) **MUST** be called.
/// # Examples
///
/// ```
/// # use bevy_time::*;
/// use std::time::Duration;
/// let mut stopwatch = Stopwatch::new();
/// assert_eq!(stopwatch.elapsed_secs(), 0.0);
///
/// stopwatch.tick(Duration::from_secs_f32(1.0)); // tick one second
/// assert_eq!(stopwatch.elapsed_secs(), 1.0);
///
/// stopwatch.pause();
/// stopwatch.tick(Duration::from_secs_f32(1.0)); // paused stopwatches don't tick
/// assert_eq!(stopwatch.elapsed_secs(), 1.0);
///
/// stopwatch.reset(); // reset the stopwatch
/// assert!(stopwatch.paused());
/// assert_eq!(stopwatch.elapsed_secs(), 0.0);
/// ```
#[derive(Clone, Debug, Default, PartialEq, Eq)]
#[cfg_attr(feature = "serialize", derive(serde::Deserialize, serde::Serialize))]
#[cfg_attr(feature = "bevy_reflect", derive(Reflect), reflect(Default))]
pub struct Stopwatch {
elapsed: Duration,
paused: bool,
}
impl Stopwatch {
/// Create a new unpaused `Stopwatch` with no elapsed time.
///
/// # Examples
/// ```
/// # use bevy_time::*;
/// let stopwatch = Stopwatch::new();
/// assert_eq!(stopwatch.elapsed_secs(), 0.0);
/// assert_eq!(stopwatch.paused(), false);
/// ```
pub fn new() -> Self {
Default::default()
}
/// Returns the elapsed time since the last [`reset`](Stopwatch::reset)
/// of the stopwatch.
///
/// # Examples
/// ```
/// # use bevy_time::*;
/// use std::time::Duration;
/// let mut stopwatch = Stopwatch::new();
/// stopwatch.tick(Duration::from_secs(1));
/// assert_eq!(stopwatch.elapsed(), Duration::from_secs(1));
/// ```
///
/// # See Also
///
/// [`elapsed_secs`](Stopwatch::elapsed_secs) - if an `f32` value is desirable instead.
/// [`elapsed_secs_f64`](Stopwatch::elapsed_secs_f64) - if an `f64` is desirable instead.
#[inline]
pub fn elapsed(&self) -> Duration {
self.elapsed
}
/// Returns the elapsed time since the last [`reset`](Stopwatch::reset)
/// of the stopwatch, in seconds.
///
/// # Examples
/// ```
/// # use bevy_time::*;
/// use std::time::Duration;
/// let mut stopwatch = Stopwatch::new();
/// stopwatch.tick(Duration::from_secs(1));
/// assert_eq!(stopwatch.elapsed_secs(), 1.0);
/// ```
///
/// # See Also
///
/// [`elapsed`](Stopwatch::elapsed) - if a `Duration` is desirable instead.
/// [`elapsed_secs_f64`](Stopwatch::elapsed_secs_f64) - if an `f64` is desirable instead.
#[inline]
pub fn elapsed_secs(&self) -> f32 {
self.elapsed().as_secs_f32()
}
/// Returns the elapsed time since the last [`reset`](Stopwatch::reset)
/// of the stopwatch, in seconds, as f64.
///
/// # See Also
///
/// [`elapsed`](Stopwatch::elapsed) - if a `Duration` is desirable instead.
/// [`elapsed_secs`](Stopwatch::elapsed_secs) - if an `f32` is desirable instead.
#[inline]
pub fn elapsed_secs_f64(&self) -> f64 {
self.elapsed().as_secs_f64()
}
/// Sets the elapsed time of the stopwatch.
///
/// # Examples
/// ```
/// # use bevy_time::*;
/// use std::time::Duration;
/// let mut stopwatch = Stopwatch::new();
/// stopwatch.set_elapsed(Duration::from_secs_f32(1.0));
/// assert_eq!(stopwatch.elapsed_secs(), 1.0);
/// ```
#[inline]
pub fn set_elapsed(&mut self, time: Duration) {
self.elapsed = time;
}
/// Advance the stopwatch by `delta` seconds.
/// If the stopwatch is paused, ticking will not have any effect
/// on elapsed time.
///
/// # Examples
/// ```
/// # use bevy_time::*;
/// use std::time::Duration;
/// let mut stopwatch = Stopwatch::new();
/// stopwatch.tick(Duration::from_secs_f32(1.5));
/// assert_eq!(stopwatch.elapsed_secs(), 1.5);
/// ```
pub fn tick(&mut self, delta: Duration) -> &Self {
if !self.paused() {
self.elapsed += delta;
}
self
}
/// Pauses the stopwatch. Any call to [`tick`](Stopwatch::tick) while
/// paused will not have any effect on the elapsed time.
///
/// # Examples
/// ```
/// # use bevy_time::*;
/// use std::time::Duration;
/// let mut stopwatch = Stopwatch::new();
/// stopwatch.pause();
/// stopwatch.tick(Duration::from_secs_f32(1.5));
/// assert!(stopwatch.paused());
/// assert_eq!(stopwatch.elapsed_secs(), 0.0);
/// ```
#[inline]
pub fn pause(&mut self) {
self.paused = true;
}
/// Unpauses the stopwatch. Resume the effect of ticking on elapsed time.
///
/// # Examples
/// ```
/// # use bevy_time::*;
/// use std::time::Duration;
/// let mut stopwatch = Stopwatch::new();
/// stopwatch.pause();
/// stopwatch.tick(Duration::from_secs_f32(1.0));
/// stopwatch.unpause();
/// stopwatch.tick(Duration::from_secs_f32(1.0));
/// assert!(!stopwatch.paused());
/// assert_eq!(stopwatch.elapsed_secs(), 1.0);
/// ```
#[inline]
pub fn unpause(&mut self) {
self.paused = false;
}
/// Returns `true` if the stopwatch is paused.
///
/// # Examples
/// ```
/// # use bevy_time::*;
/// let mut stopwatch = Stopwatch::new();
/// assert!(!stopwatch.paused());
/// stopwatch.pause();
/// assert!(stopwatch.paused());
/// stopwatch.unpause();
/// assert!(!stopwatch.paused());
/// ```
#[inline]
pub fn paused(&self) -> bool {
self.paused
}
/// Resets the stopwatch. The reset doesn't affect the paused state of the stopwatch.
///
/// # Examples
/// ```
/// # use bevy_time::*;
/// use std::time::Duration;
/// let mut stopwatch = Stopwatch::new();
/// stopwatch.tick(Duration::from_secs_f32(1.5));
/// stopwatch.reset();
/// assert_eq!(stopwatch.elapsed_secs(), 0.0);
/// ```
#[inline]
pub fn reset(&mut self) {
self.elapsed = Default::default();
}
}