Struct bevy::ecs::archetype::Archetypes

pub struct Archetypes { /* private fields */ }

The backing store of all Archetypes within a World.

For more information, see the module level documentation.

Implementations

impl Archetypes

pub fn generation(&self) -> ArchetypeGeneration

Returns the current archetype generation. This is an ID indicating the current set of archetypes that are registered with the world.

pub fn len(&self) -> usize

Fetches the total number of Archetypes within the world.

pub fn empty(&self) -> &Archetype

Fetches an immutable reference to the archetype without any components.

Shorthand for archetypes.get(ArchetypeId::EMPTY).unwrap()

pub fn get(&self, id: ArchetypeId) -> Option<&Archetype>

Fetches an immutable reference to an Archetype using its ID. Returns None if no corresponding archetype exists.

pub fn iter(&self) -> impl Iterator<Item = &Archetype>

Returns a read-only iterator over all archetypes.

pub fn archetype_components_len(&self) -> usize

Returns the number of components that are stored in archetypes. Note that if some component T is stored in more than one archetype, it will be counted once for each archetype it’s present in.

Trait Implementations

impl Index<ArchetypeId> for Archetypes

type Output = Archetype

The returned type after indexing.

fn index( &self, index: ArchetypeId ) -> &<Archetypes as Index<ArchetypeId>>::Output

Performs the indexing (container[index]) operation.

impl IndexMut<ArchetypeId> for Archetypes

fn index_mut( &mut self, index: ArchetypeId ) -> &mut <Archetypes as Index<ArchetypeId>>::Output

Performs the mutable indexing (container[index]) operation.

impl<'a> SystemParam for &'a Archetypes

type State = ()

Used to store data which persists across invocations of a system.

type Item<'w, 's> = &'w Archetypes

The item type returned when constructing this system param. The value of this associated type should be Self, instantiated with new lifetimes.

fn init_state( _world: &mut World, _system_meta: &mut SystemMeta ) -> <&'a Archetypes as SystemParam>::State

Registers any World access used by this SystemParam and creates a new instance of this param’s State.

unsafe fn get_param<'w, 's>( _state: &'s mut <&'a Archetypes as SystemParam>::State, _system_meta: &SystemMeta, world: UnsafeWorldCell<'w>, _change_tick: Tick ) -> <&'a Archetypes as SystemParam>::Item<'w, 's>

Creates a parameter to be passed into a SystemParamFunction.

fn new_archetype( _state: &mut Self::State, _archetype: &Archetype, _system_meta: &mut SystemMeta )

For the specified Archetype, registers the components accessed by this SystemParam (if applicable).

fn apply(state: &mut Self::State, system_meta: &SystemMeta, world: &mut World)

Applies any deferred mutations stored in this SystemParam’s state. This is used to apply Commands during apply_deferred.

impl<'a> ReadOnlySystemParam for &'a Archetypes