Struct bevy::ecs::system::SystemChangeTick
[−]pub struct SystemChangeTick { /* private fields */ }
Expand description
A SystemParam
that reads the previous and current change ticks of the system.
A system’s change ticks are updated each time it runs:
last_change_tick
copies the previous value ofchange_tick
change_tick
copies the current value ofWorld::read_change_tick
Component change ticks that are more recent than last_change_tick
will be detected by the system.
Those can be read by calling last_changed
on a Mut<T>
or ResMut<T>
.
Implementations
impl SystemChangeTick
impl SystemChangeTick
pub fn change_tick(&self) -> u32
pub fn change_tick(&self) -> u32
Returns the current World
change tick seen by the system.
pub fn last_change_tick(&self) -> u32
pub fn last_change_tick(&self) -> u32
Returns the World
change tick seen by the system the previous time it ran.
Trait Implementations
impl Debug for SystemChangeTick
impl Debug for SystemChangeTick
impl SystemParam for SystemChangeTick
impl SystemParam for SystemChangeTick
type Fetch = SystemChangeTickState
Auto Trait Implementations
impl RefUnwindSafe for SystemChangeTick
impl Send for SystemChangeTick
impl Sync for SystemChangeTick
impl Unpin for SystemChangeTick
impl UnwindSafe for SystemChangeTick
Blanket Implementations
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