Struct ComponentTicks 

pub struct ComponentTicks {
    pub added: Tick,
    pub changed: Tick,
}

Records when a component or resource was added and when it was last mutably dereferenced (or added).

Fields

added: Tick

Tick recording the time this component or resource was added.

changed: Tick

Tick recording the time this component or resource was most recently changed.

Implementations

impl ComponentTicks

pub fn is_added(&self, last_run: Tick, this_run: Tick) -> bool

Returns true if the component or resource was added after the system last ran (or the system is running for the first time).

pub fn is_changed(&self, last_run: Tick, this_run: Tick) -> bool

Returns true if the component or resource was added or mutably dereferenced after the system last ran (or the system is running for the first time).

pub fn new(change_tick: Tick) -> Self

Creates a new instance with the same change tick for added and changed.

pub fn set_changed(&mut self, change_tick: Tick)

Manually sets the change tick.

This is normally done automatically via the DerefMut implementation on Mut<T>, ResMut<T>, etc. However, components and resources that make use of interior mutability might require manual updates.

Example

let world: World = unimplemented!();
let component_ticks: ComponentTicks = unimplemented!();

component_ticks.set_changed(world.read_change_tick());

Trait Implementations

impl Clone for ComponentTicks

fn clone(&self) -> ComponentTicks

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ComponentTicks

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

Formats the value using the given formatter.

impl Copy for ComponentTicks