Struct bevy_ecs::query::Changed [−][src]
Filter that retrieves components of type T that have been changed since the last
execution of this system
This filter is useful for synchronizing components, and as a performance optimization as it means that the query contains fewer items for a system to iterate over.
Because the ordering of systems can change and this filter is only effective on changes before the query executes you need to use explicit dependency ordering or ordered stages to avoid frame delays.
Example:
fn print_moving_objects_system(query: Query<&Name, Changed<Transform>>) { for name in query.iter() { println!("Entity Moved: {:?}", name); } }
Trait Implementations
impl<T: Component> WorldQuery for Changed<T>[src]
type Fetch = ChangedFetch<T>
type State = ChangedState<T>
Auto Trait Implementations
impl<T> RefUnwindSafe for Changed<T> where
T: RefUnwindSafe,
T: RefUnwindSafe,
impl<T> Send for Changed<T> where
T: Send,
T: Send,
impl<T> Sync for Changed<T> where
T: Sync,
T: Sync,
impl<T> Unpin for Changed<T> where
T: Unpin,
T: Unpin,
impl<T> UnwindSafe for Changed<T> where
T: UnwindSafe,
T: UnwindSafe,
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized, [src]
T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized, [src]
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized, [src]
T: ?Sized,
pub fn borrow_mut(&mut self) -> &mut T[src]
impl<T> Component for T where
T: 'static + Send + Sync, [src]
T: 'static + Send + Sync,
impl<T> Downcast for T where
T: Any, [src]
T: Any,
pub fn into_any(self: Box<T, Global>) -> Box<dyn Any + 'static, Global>[src]
pub fn into_any_rc(self: Rc<T>) -> Rc<dyn Any + 'static>[src]
pub fn as_any(&self) -> &(dyn Any + 'static)[src]
pub fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)[src]
impl<T> DowncastSync for T where
T: Any + Send + Sync, [src]
T: Any + Send + Sync,
impl<T> From<T> for T[src]
impl<T> Instrument for T[src]
pub fn instrument(self, span: Span) -> Instrumented<Self>[src]
pub fn in_current_span(self) -> Instrumented<Self>[src]
impl<T, U> Into<U> for T where
U: From<T>, [src]
U: From<T>,
impl<T, U> TryFrom<U> for T where
U: Into<T>, [src]
U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>[src]
impl<T, U> TryInto<U> for T where
U: TryFrom<T>, [src]
U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>[src]
impl<V, T> VZip<V> for T where
V: MultiLane<T>,
V: MultiLane<T>,