Struct bevy::time::prelude::Timer

pub struct Timer { /* private fields */ }

Tracks elapsed time. Enters the finished state once duration is reached.

Non repeating timers will stop tracking and stay in the finished state until reset. Repeating timers will only be in the finished state on each tick duration is reached or exceeded, and can still be reset at any given point.

Paused timers will not have elapsed time increased.

Implementations

impl Timer

pub fn new(duration: Duration, mode: TimerMode) -> Timer

Creates a new timer with a given duration.

See also Timer::from_seconds.

pub fn from_seconds(duration: f32, mode: TimerMode) -> Timer

Creates a new timer with a given duration in seconds.

Example

let mut timer = Timer::from_seconds(1.0, TimerMode::Once);

pub fn finished(&self) -> bool

Returns true if the timer has reached its duration at least once. See also Timer::just_finished.

Examples

use std::time::Duration;
let mut timer = Timer::from_seconds(1.0, TimerMode::Once);
timer.tick(Duration::from_secs_f32(1.5));
assert!(timer.finished());
timer.tick(Duration::from_secs_f32(0.5));
assert!(timer.finished());

pub fn just_finished(&self) -> bool

Returns true only on the tick the timer reached its duration.

Examples

use std::time::Duration;
let mut timer = Timer::from_seconds(1.0, TimerMode::Once);
timer.tick(Duration::from_secs_f32(1.5));
assert!(timer.just_finished());
timer.tick(Duration::from_secs_f32(0.5));
assert!(!timer.just_finished());

pub fn elapsed(&self) -> Duration

Returns the time elapsed on the timer. Guaranteed to be between 0.0 and duration. Will only equal duration when the timer is finished and non repeating.

See also Stopwatch::elapsed.

Examples

use std::time::Duration;
let mut timer = Timer::from_seconds(1.0, TimerMode::Once);
timer.tick(Duration::from_secs_f32(0.5));
assert_eq!(timer.elapsed(), Duration::from_secs_f32(0.5));

pub fn elapsed_secs(&self) -> f32

Returns the time elapsed on the timer as an f32. See also Timer::elapsed.

pub fn set_elapsed(&mut self, time: Duration)

Sets the elapsed time of the timer without any other considerations.

See also Stopwatch::set.

use std::time::Duration;
let mut timer = Timer::from_seconds(1.0, TimerMode::Once);
timer.set_elapsed(Duration::from_secs(2));
assert_eq!(timer.elapsed(), Duration::from_secs(2));
// the timer is not finished even if the elapsed time is greater than the duration.
assert!(!timer.finished());

pub fn duration(&self) -> Duration

Returns the duration of the timer.

Examples

use std::time::Duration;
let timer = Timer::new(Duration::from_secs(1), TimerMode::Once);
assert_eq!(timer.duration(), Duration::from_secs(1));

pub fn set_duration(&mut self, duration: Duration)

Sets the duration of the timer.

Examples

use std::time::Duration;
let mut timer = Timer::from_seconds(1.5, TimerMode::Once);
timer.set_duration(Duration::from_secs(1));
assert_eq!(timer.duration(), Duration::from_secs(1));

pub fn mode(&self) -> TimerMode

Returns true if the timer is repeating.

Examples

let mut timer = Timer::from_seconds(1.0, TimerMode::Repeating);
assert_eq!(timer.mode(), TimerMode::Repeating);

pub fn set_mode(&mut self, mode: TimerMode)

Sets whether the timer is repeating or not.

Examples

let mut timer = Timer::from_seconds(1.0, TimerMode::Repeating);
timer.set_mode(TimerMode::Once);
assert_eq!(timer.mode(), TimerMode::Once);

pub fn tick(&mut self, delta: Duration) -> &Timer

Advance the timer by delta seconds. Non repeating timer will clamp at duration. Repeating timer will wrap around. Will not affect paused timers.

See also Stopwatch::tick.

Examples

use std::time::Duration;
let mut timer = Timer::from_seconds(1.0, TimerMode::Once);
let mut repeating = Timer::from_seconds(1.0, TimerMode::Repeating);
timer.tick(Duration::from_secs_f32(1.5));
repeating.tick(Duration::from_secs_f32(1.5));
assert_eq!(timer.elapsed_secs(), 1.0);
assert_eq!(repeating.elapsed_secs(), 0.5);

pub fn pause(&mut self)

Pauses the Timer. Disables the ticking of the timer.

See also Stopwatch::pause.

Examples

use std::time::Duration;
let mut timer = Timer::from_seconds(1.0, TimerMode::Once);
timer.pause();
timer.tick(Duration::from_secs_f32(0.5));
assert_eq!(timer.elapsed_secs(), 0.0);

pub fn unpause(&mut self)

Unpauses the Timer. Resumes the ticking of the timer.

See also Stopwatch::unpause().

Examples

use std::time::Duration;
let mut timer = Timer::from_seconds(1.0, TimerMode::Once);
timer.pause();
timer.tick(Duration::from_secs_f32(0.5));
timer.unpause();
timer.tick(Duration::from_secs_f32(0.5));
assert_eq!(timer.elapsed_secs(), 0.5);

pub fn paused(&self) -> bool

Returns true if the timer is paused.

See also Stopwatch::paused.

Examples

let mut timer = Timer::from_seconds(1.0, TimerMode::Once);
assert!(!timer.paused());
timer.pause();
assert!(timer.paused());
timer.unpause();
assert!(!timer.paused());

pub fn reset(&mut self)

Resets the timer. The reset doesn’t affect the paused state of the timer.

See also Stopwatch::reset.

Examples

use std::time::Duration;
let mut timer = Timer::from_seconds(1.0, TimerMode::Once);
timer.tick(Duration::from_secs_f32(1.5));
timer.reset();
assert!(!timer.finished());
assert!(!timer.just_finished());
assert_eq!(timer.elapsed_secs(), 0.0);

pub fn percent(&self) -> f32

Returns the percentage of the timer elapsed time (goes from 0.0 to 1.0).

Examples

use std::time::Duration;
let mut timer = Timer::from_seconds(2.0, TimerMode::Once);
timer.tick(Duration::from_secs_f32(0.5));
assert_eq!(timer.percent(), 0.25);

pub fn percent_left(&self) -> f32

Returns the percentage of the timer remaining time (goes from 1.0 to 0.0).

Examples

use std::time::Duration;
let mut timer = Timer::from_seconds(2.0, TimerMode::Once);
timer.tick(Duration::from_secs_f32(0.5));
assert_eq!(timer.percent_left(), 0.75);

pub fn remaining_secs(&self) -> f32

Returns the remaining time in seconds

Examples

use std::cmp::Ordering;
use std::time::Duration;
let mut timer = Timer::from_seconds(2.0, TimerMode::Once);
timer.tick(Duration::from_secs_f32(0.5));
let result = timer.remaining_secs().total_cmp(&1.5);
assert_eq!(Ordering::Equal, result);

pub fn remaining(&self) -> Duration

Returns the remaining time using Duration

Examples

use std::time::Duration;
let mut timer = Timer::from_seconds(2.0, TimerMode::Once);
timer.tick(Duration::from_secs_f32(0.5));
assert_eq!(timer.remaining(), Duration::from_secs_f32(1.5));

pub fn times_finished_this_tick(&self) -> u32

Returns the number of times a repeating timer finished during the last tick call.

For non repeating-timers, this method will only ever return 0 or 1.

Examples

use std::time::Duration;
let mut timer = Timer::from_seconds(1.0, TimerMode::Repeating);
timer.tick(Duration::from_secs_f32(6.0));
assert_eq!(timer.times_finished_this_tick(), 6);
timer.tick(Duration::from_secs_f32(2.0));
assert_eq!(timer.times_finished_this_tick(), 2);
timer.tick(Duration::from_secs_f32(0.5));
assert_eq!(timer.times_finished_this_tick(), 0);

Trait Implementations

impl Clone for Timer

fn clone(&self) -> Timer

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Timer

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

Formats the value using the given formatter.

impl Default for Timer

fn default() -> Timer

Returns the “default value” for a type.

impl FromReflect for Timerwhere
    Stopwatch: FromReflect,
    Duration: FromReflect,
    TimerMode: FromReflect,
    bool: FromReflect,
    u32: FromReflect,

fn from_reflect(reflect: &(dyn Reflect + 'static)) -> Option<Timer>

Constructs a concrete instance of Self from a reflected value.

impl GetTypeRegistration for Timer

fn get_type_registration() -> TypeRegistration

impl Reflect for Timer

fn type_name(&self) -> &str

Returns the type name of the underlying type.

fn get_type_info(&self) -> &'static TypeInfo

Returns the TypeInfo of the underlying type.

fn into_any(self: Box<Timer, Global>) -> Box<dyn Any + 'static, Global>

Returns the value as a Box<dyn Any>.

fn as_any(&self) -> &(dyn Any + 'static)

Returns the value as a &dyn Any.

fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Returns the value as a &mut dyn Any.

fn into_reflect(self: Box<Timer, Global>) -> Box<dyn Reflect + 'static, Global>

Casts this type to a boxed reflected value.

fn as_reflect(&self) -> &(dyn Reflect + 'static)

Casts this type to a reflected value.

fn as_reflect_mut(&mut self) -> &mut (dyn Reflect + 'static)

Casts this type to a mutable reflected value.

fn clone_value(&self) -> Box<dyn Reflect + 'static, Global>

Clones the value as a Reflect trait object.

fn set(
    &mut self,
    value: Box<dyn Reflect + 'static, Global>
) -> Result<(), Box<dyn Reflect + 'static, Global>>

Performs a type-checked assignment of a reflected value to this value.

fn apply(&mut self, value: &(dyn Reflect + 'static))

Applies a reflected value to this value.

fn reflect_ref(&self) -> ReflectRef<'_>

Returns an enumeration of “kinds” of type.

fn reflect_mut(&mut self) -> ReflectMut<'_>

Returns a mutable enumeration of “kinds” of type.

fn reflect_owned(self: Box<Timer, Global>) -> ReflectOwned

Returns an owned enumeration of “kinds” of type.

fn reflect_partial_eq(&self, value: &(dyn Reflect + 'static)) -> Option<bool>

Returns a “partial equality” comparison result.

fn reflect_hash(&self) -> Option<u64>

Returns a hash of the value (which includes the type).

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

Debug formatter for the value.

fn serializable(&self) -> Option<Serializable<'_>>

Returns a serializable version of the value.

impl Struct for Timer

fn field(&self, name: &str) -> Option<&(dyn Reflect + 'static)>

Returns a reference to the value of the field named name as a &dyn Reflect.

fn field_mut(&mut self, name: &str) -> Option<&mut (dyn Reflect + 'static)>

Returns a mutable reference to the value of the field named name as a &mut dyn Reflect.

fn field_at(&self, index: usize) -> Option<&(dyn Reflect + 'static)>

Returns a reference to the value of the field with index index as a &dyn Reflect.

fn field_at_mut(&mut self, index: usize) -> Option<&mut (dyn Reflect + 'static)>

Returns a mutable reference to the value of the field with index index as a &mut dyn Reflect.

fn name_at(&self, index: usize) -> Option<&str>

Returns the name of the field with index index.

fn field_len(&self) -> usize

Returns the number of fields in the struct.

fn iter_fields(&self) -> FieldIter<'_>

Returns an iterator over the values of the reflectable fields for this struct.

fn clone_dynamic(&self) -> DynamicStruct

Clones the struct into a DynamicStruct.

impl Typed for Timer

fn type_info() -> &'static TypeInfo

Returns the compile-time info for the underlying type.