Struct bevy::ecs::query::ChangeTrackersFetch

pub struct ChangeTrackersFetch<T> { /* fields omitted */ }

The Fetch of ChangeTrackers.

Trait Implementations

impl<T> Clone for ChangeTrackersFetch<T>

pub fn clone(&self) -> ChangeTrackersFetch<T>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'w, 's, T> Fetch<'w, 's> for ChangeTrackersFetch<T> where
    T: Component, 

type Item = ChangeTrackers<T>

type State = ChangeTrackersState<T>

pub const IS_DENSE: bool

Returns true if (and only if) every table of every archetype matched by this Fetch contains all of the matched components. This is used to select a more efficient “table iterator” for “dense” queries. If this returns true, Fetch::set_table and Fetch::table_fetch will be called for iterators. If this returns false, Fetch::set_archetype and Fetch::archetype_fetch will be called for iterators.

pub unsafe fn init(
    world: &World,
    state: &<ChangeTrackersFetch<T> as Fetch<'w, 's>>::State,
    last_change_tick: u32,
    change_tick: u32
) -> ChangeTrackersFetch<T>

Creates a new instance of this fetch.

pub unsafe fn set_archetype(
    &mut self,
    state: &<ChangeTrackersFetch<T> as Fetch<'w, 's>>::State,
    archetype: &Archetype,
    tables: &Tables
)

Adjusts internal state to account for the next Archetype. This will always be called on archetypes that match this Fetch.

pub unsafe fn set_table(
    &mut self,
    state: &<ChangeTrackersFetch<T> as Fetch<'w, 's>>::State,
    table: &Table
)

Adjusts internal state to account for the next Table. This will always be called on tables that match this Fetch.

pub unsafe fn archetype_fetch(
    &mut self,
    archetype_index: usize
) -> <ChangeTrackersFetch<T> as Fetch<'w, 's>>::Item

Fetch Self::Item for the given archetype_index in the current Archetype. This must always be called after Fetch::set_archetype with an archetype_index in the range of the current Archetype

pub unsafe fn table_fetch(
    &mut self,
    table_row: usize
) -> <ChangeTrackersFetch<T> as Fetch<'w, 's>>::Item

Fetch Self::Item for the given table_row in the current Table. This must always be called after Fetch::set_table with a table_row in the range of the current Table

impl<T> ReadOnlyFetch for ChangeTrackersFetch<T>

SAFETY: access is read only