Struct bevy_time::Stopwatch

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pub struct Stopwatch { /* private fields */ }
Expand description

A Stopwatch is a struct that track elapsed time when started.

Note that in order to advance the stopwatch tick MUST be called.

§Examples

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);

Implementations§

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impl Stopwatch

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pub fn new() -> Self

Create a new unpaused Stopwatch with no elapsed time.

§Examples
let stopwatch = Stopwatch::new();
assert_eq!(stopwatch.elapsed_secs(), 0.0);
assert_eq!(stopwatch.paused(), false);
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pub fn elapsed(&self) -> Duration

Returns the elapsed time since the last reset of the stopwatch.

§Examples
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 - if an f32 value is desirable instead. elapsed_secs_f64 - if an f64 is desirable instead.

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pub fn elapsed_secs(&self) -> f32

Returns the elapsed time since the last reset of the stopwatch, in seconds.

§Examples
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 - if a Duration is desirable instead. elapsed_secs_f64 - if an f64 is desirable instead.

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pub fn elapsed_secs_f64(&self) -> f64

Returns the elapsed time since the last reset of the stopwatch, in seconds, as f64.

§See Also

elapsed - if a Duration is desirable instead. elapsed_secs - if an f32 is desirable instead.

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

Sets the elapsed time of the stopwatch.

§Examples
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);
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pub fn tick(&mut self, delta: Duration) -> &Self

Advance the stopwatch by delta seconds. If the stopwatch is paused, ticking will not have any effect on elapsed time.

§Examples
use std::time::Duration;
let mut stopwatch = Stopwatch::new();
stopwatch.tick(Duration::from_secs_f32(1.5));
assert_eq!(stopwatch.elapsed_secs(), 1.5);
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pub fn pause(&mut self)

Pauses the stopwatch. Any call to tick while paused will not have any effect on the elapsed time.

§Examples
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);
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pub fn unpause(&mut self)

Unpauses the stopwatch. Resume the effect of ticking on elapsed time.

§Examples
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);
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pub fn paused(&self) -> bool

Returns true if the stopwatch is paused.

§Examples
let mut stopwatch = Stopwatch::new();
assert!(!stopwatch.paused());
stopwatch.pause();
assert!(stopwatch.paused());
stopwatch.unpause();
assert!(!stopwatch.paused());
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pub fn reset(&mut self)

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

§Examples
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);

Trait Implementations§

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impl Clone for Stopwatch

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fn clone(&self) -> Stopwatch

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Stopwatch

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

Formats the value using the given formatter. Read more
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impl Default for Stopwatch

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fn default() -> Stopwatch

Returns the “default value” for a type. Read more
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impl FromReflect for Stopwatch
where Self: Any + Send + Sync, Duration: FromReflect + TypePath + RegisterForReflection, bool: FromReflect + TypePath + RegisterForReflection,

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fn from_reflect(reflect: &dyn Reflect) -> Option<Self>

Constructs a concrete instance of Self from a reflected value.
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fn take_from_reflect( reflect: Box<dyn Reflect> ) -> Result<Self, Box<dyn Reflect>>

Attempts to downcast the given value to Self using, constructing the value using from_reflect if that fails. Read more
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impl GetTypeRegistration for Stopwatch
where Self: Any + Send + Sync, Duration: FromReflect + TypePath + RegisterForReflection, bool: FromReflect + TypePath + RegisterForReflection,

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fn get_type_registration() -> TypeRegistration

Returns the default TypeRegistration for this type.
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fn register_type_dependencies(registry: &mut TypeRegistry)

Registers other types needed by this type. Read more
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impl PartialEq for Stopwatch

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fn eq(&self, other: &Stopwatch) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Reflect for Stopwatch
where Self: Any + Send + Sync, Duration: FromReflect + TypePath + RegisterForReflection, bool: FromReflect + TypePath + RegisterForReflection,

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fn get_represented_type_info(&self) -> Option<&'static TypeInfo>

Returns the TypeInfo of the type represented by this value. Read more
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fn into_any(self: Box<Self>) -> Box<dyn Any>

Returns the value as a Box<dyn Any>.
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fn as_any(&self) -> &dyn Any

Returns the value as a &dyn Any.
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fn as_any_mut(&mut self) -> &mut dyn Any

Returns the value as a &mut dyn Any.
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fn into_reflect(self: Box<Self>) -> Box<dyn Reflect>

Casts this type to a boxed reflected value.
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fn as_reflect(&self) -> &dyn Reflect

Casts this type to a reflected value.
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fn as_reflect_mut(&mut self) -> &mut dyn Reflect

Casts this type to a mutable reflected value.
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fn clone_value(&self) -> Box<dyn Reflect>

Clones the value as a Reflect trait object. Read more
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fn set(&mut self, value: Box<dyn Reflect>) -> Result<(), Box<dyn Reflect>>

Performs a type-checked assignment of a reflected value to this value. Read more
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fn try_apply(&mut self, value: &dyn Reflect) -> Result<(), ApplyError>

Tries to apply a reflected value to this value. Read more
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fn reflect_kind(&self) -> ReflectKind

Returns a zero-sized enumeration of “kinds” of type. Read more
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fn reflect_ref(&self) -> ReflectRef<'_>

Returns an immutable enumeration of “kinds” of type. Read more
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fn reflect_mut(&mut self) -> ReflectMut<'_>

Returns a mutable enumeration of “kinds” of type. Read more
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fn reflect_owned(self: Box<Self>) -> ReflectOwned

Returns an owned enumeration of “kinds” of type. Read more
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fn reflect_partial_eq(&self, value: &dyn Reflect) -> Option<bool>

Returns a “partial equality” comparison result. Read more
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fn apply(&mut self, value: &(dyn Reflect + 'static))

Applies a reflected value to this value. Read more
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fn reflect_hash(&self) -> Option<u64>

Returns a hash of the value (which includes the type). Read more
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fn debug(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Debug formatter for the value. Read more
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fn serializable(&self) -> Option<Serializable<'_>>

Returns a serializable version of the value. Read more
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fn is_dynamic(&self) -> bool

Indicates whether or not this type is a dynamic type. Read more
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impl Struct for Stopwatch
where Self: Any + Send + Sync, Duration: FromReflect + TypePath + RegisterForReflection, bool: FromReflect + TypePath + RegisterForReflection,

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

Returns a reference to the value of the field named name as a &dyn Reflect.
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fn field_mut(&mut self, name: &str) -> Option<&mut dyn Reflect>

Returns a mutable reference to the value of the field named name as a &mut dyn Reflect.
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fn field_at(&self, index: usize) -> Option<&dyn Reflect>

Returns a reference to the value of the field with index index as a &dyn Reflect.
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fn field_at_mut(&mut self, index: usize) -> Option<&mut dyn Reflect>

Returns a mutable reference to the value of the field with index index as a &mut dyn Reflect.
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fn name_at(&self, index: usize) -> Option<&str>

Returns the name of the field with index index.
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fn field_len(&self) -> usize

Returns the number of fields in the struct.
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fn iter_fields(&self) -> FieldIter<'_>

Returns an iterator over the values of the reflectable fields for this struct.
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fn clone_dynamic(&self) -> DynamicStruct

Clones the struct into a DynamicStruct.
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impl TypePath for Stopwatch
where Self: Any + Send + Sync,

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fn type_path() -> &'static str

Returns the fully qualified path of the underlying type. Read more
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fn short_type_path() -> &'static str

Returns a short, pretty-print enabled path to the type. Read more
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fn type_ident() -> Option<&'static str>

Returns the name of the type, or None if it is anonymous. Read more
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fn crate_name() -> Option<&'static str>

Returns the name of the crate the type is in, or None if it is anonymous. Read more
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fn module_path() -> Option<&'static str>

Returns the path to the module the type is in, or None if it is anonymous. Read more
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impl Typed for Stopwatch
where Self: Any + Send + Sync, Duration: FromReflect + TypePath + RegisterForReflection, bool: FromReflect + TypePath + RegisterForReflection,

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fn type_info() -> &'static TypeInfo

Returns the compile-time info for the underlying type.
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impl Eq for Stopwatch

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impl StructuralPartialEq for Stopwatch

Auto Trait Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> Downcast for T
where T: Any,

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Convert Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>. Box<dyn Any> can then be further downcast into Box<ConcreteType> where ConcreteType implements Trait.
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Convert Rc<Trait> (where Trait: Downcast) to Rc<Any>. Rc<Any> can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait.
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fn as_any(&self) -> &(dyn Any + 'static)

Convert &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s.
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fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Convert &mut Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &mut Any’s vtable from &mut Trait’s.
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impl<T> DowncastSync for T
where T: Any + Send + Sync,

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fn into_any_arc(self: Arc<T>) -> Arc<dyn Any + Sync + Send>

Convert Arc<Trait> (where Trait: Downcast) to Arc<Any>. Arc<Any> can then be further downcast into Arc<ConcreteType> where ConcreteType implements Trait.
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impl<T> DynEq for T
where T: Any + Eq,

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

Casts the type to dyn Any.
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fn dyn_eq(&self, other: &(dyn DynEq + 'static)) -> bool

This method tests for self and other values to be equal. Read more
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impl<T> DynamicTypePath for T
where T: TypePath,

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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
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Returns the argument unchanged.

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where T: Default,

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Creates Self using data from the given World.
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where S: Struct,

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fn get_field<T>(&self, name: &str) -> Option<&T>
where T: Reflect,

Returns a reference to the value of the field named name, downcast to T.
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fn get_field_mut<T>(&mut self, name: &str) -> Option<&mut T>
where T: Reflect,

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fn reflect_path<'p>( &self, path: impl ReflectPath<'p> ) -> Result<&(dyn Reflect + 'static), ReflectPathError<'p>>

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Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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