Struct EntityRefExcept 

pub struct EntityRefExcept<'w, 's, B>
where
    B: Bundle,
{ /* private fields */ }

Provides read-only access to a single entity and all its components, save for an explicitly-enumerated set.

Implementations

impl<'w, 's, B> EntityRefExcept<'w, 's, B>

where B: Bundle,

pub fn into_filtered(self) -> FilteredEntityRef<'w, 's>

Consumes self and returns a FilteredEntityRef, which provides read-only access to all of the entity’s components, except for the ones in B.

pub fn id(&self) -> Entity

Returns the ID of the current entity.

pub fn get<C>(&self) -> Option<&'w C>

where C: Component,

Gets access to the component of type C for the current entity. Returns None if the component doesn’t have a component of that type or if the type is one of the excluded components.

pub fn get_ref<C>(&self) -> Option<Ref<'w, C>>

where C: Component,

Gets access to the component of type C for the current entity, including change detection information. Returns None if the component doesn’t have a component of that type or if the type is one of the excluded components.

pub fn spawned_by(&self) -> MaybeLocation

Returns the source code location from which this entity has been spawned.

pub fn spawn_tick(&self) -> Tick

Returns the Tick at which this entity has been spawned.

pub fn get_by_id(&self, component_id: ComponentId) -> Option<Ptr<'w>>

Gets the component of the given ComponentId from the entity.

You should prefer to use the typed API Self::get where possible and only use this in cases where the actual component types are not known at compile time.

Unlike EntityRefExcept::get, this returns a raw pointer to the component, which is only valid while the EntityRefExcept is alive.

pub fn contains<T>(&self) -> bool

where T: Component,

Returns true if the current entity has a component of type T. Otherwise, this returns false.

Notes

If you do not know the concrete type of a component, consider using Self::contains_id or Self::contains_type_id.

pub fn contains_id(&self, component_id: ComponentId) -> bool

Returns true if the current entity has a component identified by component_id. Otherwise, this returns false.

Notes

• If you know the concrete type of the component, you should prefer Self::contains.
• If you know the component’s TypeId but not its ComponentId, consider using Self::contains_type_id.

pub fn contains_type_id(&self, type_id: TypeId) -> bool

Returns true if the current entity has a component with the type identified by type_id. Otherwise, this returns false.

Notes

• If you know the concrete type of the component, you should prefer Self::contains.
• If you have a ComponentId instead of a TypeId, consider using Self::contains_id.

pub fn get_change_ticks<T>(&self) -> Option<ComponentTicks>

where T: Component,

Retrieves the change ticks for the given component. This can be useful for implementing change detection in custom runtimes.

pub fn get_change_ticks_by_id( &self, component_id: ComponentId, ) -> Option<ComponentTicks>

Retrieves the change ticks for the given ComponentId. This can be useful for implementing change detection in custom runtimes.

You should prefer to use the typed API Self::get_change_ticks where possible and only use this in cases where the actual component types are not known at compile time.

Trait Implementations

impl<B> Clone for EntityRefExcept<'_, '_, B>

where B: Bundle,

fn clone(&self) -> EntityRefExcept<'_, '_, B>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<B> ContainsEntity for EntityRefExcept<'_, '_, B>

where B: Bundle,

fn entity(&self) -> Entity

Returns the contained entity.

impl<'w, 's, B> From<&'w EntityMutExcept<'_, 's, B>> for EntityRefExcept<'w, 's, B>

where B: Bundle,

fn from(entity: &'w EntityMutExcept<'_, 's, B>) -> EntityRefExcept<'w, 's, B>

Converts to this type from the input type.

impl<'w, 's, B> From<&EntityRefExcept<'w, 's, B>> for FilteredEntityRef<'w, 's>

where B: Bundle,

fn from(entity: &EntityRefExcept<'w, 's, B>) -> FilteredEntityRef<'w, 's>

Converts to this type from the input type.

impl<'w, 's, B> From<EntityMutExcept<'w, 's, B>> for EntityRefExcept<'w, 's, B>

where B: Bundle,

fn from(entity: EntityMutExcept<'w, 's, B>) -> EntityRefExcept<'w, 's, B>

Converts to this type from the input type.

impl<'w, 's, B> From<EntityRefExcept<'w, 's, B>> for FilteredEntityRef<'w, 's>

where B: Bundle,

fn from(entity: EntityRefExcept<'w, 's, B>) -> FilteredEntityRef<'w, 's>

Converts to this type from the input type.

impl<B> Hash for EntityRefExcept<'_, '_, B>

where B: Bundle,

fn hash<H>(&self, state: &mut H)

where H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<B> Ord for EntityRefExcept<'_, '_, B>

where B: Bundle,

fn cmp(&self, other: &EntityRefExcept<'_, '_, B>) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl<B> PartialEq for EntityRefExcept<'_, '_, B>

where B: Bundle,

fn eq(&self, other: &EntityRefExcept<'_, '_, B>) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<B> PartialOrd for EntityRefExcept<'_, '_, B>

where B: Bundle,

fn partial_cmp(&self, other: &EntityRefExcept<'_, '_, B>) -> Option<Ordering>

EntityRefExcept’s comparison trait implementations match the underlying Entity, and cannot discern between different worlds.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl<'a, 'b, B> QueryData for EntityRefExcept<'a, 'b, B>

where B: Bundle,

const IS_READ_ONLY: bool = true

True if this query is read-only and may not perform mutable access.

const IS_ARCHETYPAL: bool = true

Returns true if (and only if) this query data relies strictly on archetypes to limit which entities are accessed by the Query.

type ReadOnly = EntityRefExcept<'a, 'b, B>

The read-only variant of this QueryData, which satisfies the ReadOnlyQueryData trait.

type Item<'w, 's> = EntityRefExcept<'w, 's, B>

The item returned by this WorldQuery This will be the data retrieved by the query, and is visible to the end user when calling e.g. Query<Self>::get.

fn shrink<'wlong, 'wshort, 's>( item: <EntityRefExcept<'a, 'b, B> as QueryData>::Item<'wlong, 's>, ) -> <EntityRefExcept<'a, 'b, B> as QueryData>::Item<'wshort, 's>

where 'wlong: 'wshort,

This function manually implements subtyping for the query items.

unsafe fn fetch<'w, 's>( access: &'s <EntityRefExcept<'a, 'b, B> as WorldQuery>::State, fetch: &mut <EntityRefExcept<'a, 'b, B> as WorldQuery>::Fetch<'w>, entity: Entity, _: TableRow, ) -> Option<<EntityRefExcept<'a, 'b, B> as QueryData>::Item<'w, 's>>

Fetch Self::Item for either the given entity in the current Table, or for the given entity in the current Archetype. This must always be called after WorldQuery::set_table with a table_row in the range of the current Table or after WorldQuery::set_archetype with an entity in the current archetype. Accesses components registered in WorldQuery::update_component_access.

fn iter_access( state: &<EntityRefExcept<'a, 'b, B> as WorldQuery>::State, ) -> impl Iterator<Item = EcsAccessType<'_>>

Returns an iterator over the access needed by QueryData::fetch. Access conflicts are usually checked in WorldQuery::update_component_access, but in certain cases this method can be useful to implement a way of checking for access conflicts in a non-allocating way.

fn provide_extra_access( _state: &mut Self::State, _access: &mut Access, _available_access: &Access, )

Offers additional access above what we requested in update_component_access. Implementations may add additional access that is a subset of available_access and does not conflict with anything in access, and must update access to include that access.

impl<'a, 'b, B> WorldQuery for EntityRefExcept<'a, 'b, B>

where B: Bundle,

const IS_DENSE: bool = true

Returns true if (and only if) every table of every archetype matched by this fetch contains all of the matched components.

type Fetch<'w> = EntityFetch<'w>

Per archetype/table state retrieved by this WorldQuery to compute Self::Item for each entity.

type State = Access

State used to construct a Self::Fetch. This will be cached inside QueryState, so it is best to move as much data / computation here as possible to reduce the cost of constructing Self::Fetch.

fn shrink_fetch<'wlong, 'wshort>( fetch: <EntityRefExcept<'a, 'b, B> as WorldQuery>::Fetch<'wlong>, ) -> <EntityRefExcept<'a, 'b, B> as WorldQuery>::Fetch<'wshort>

where 'wlong: 'wshort,

This function manually implements subtyping for the query fetches.

unsafe fn init_fetch<'w, 's>( world: UnsafeWorldCell<'w>, _: &'s <EntityRefExcept<'a, 'b, B> as WorldQuery>::State, last_run: Tick, this_run: Tick, ) -> <EntityRefExcept<'a, 'b, B> as WorldQuery>::Fetch<'w>

Creates a new instance of Self::Fetch, by combining data from the World with the cached Self::State. Readonly accesses resources registered in WorldQuery::update_component_access.

unsafe fn set_archetype<'w, 's>( _: &mut <EntityRefExcept<'a, 'b, B> as WorldQuery>::Fetch<'w>, _: &'s <EntityRefExcept<'a, 'b, B> as WorldQuery>::State, _: &'w Archetype, _: &'w Table, )

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

unsafe fn set_table<'w, 's>( _: &mut <EntityRefExcept<'a, 'b, B> as WorldQuery>::Fetch<'w>, _: &'s <EntityRefExcept<'a, 'b, B> as WorldQuery>::State, _: &'w Table, )

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

fn update_component_access( state: &<EntityRefExcept<'a, 'b, B> as WorldQuery>::State, filtered_access: &mut FilteredAccess, )

Adds any component accesses to the current entity used by this WorldQuery to access.

fn init_state( world: &mut World, ) -> <EntityRefExcept<'a, 'b, B> as WorldQuery>::State

Creates and initializes a State for this WorldQuery type.

fn get_state( components: &Components, ) -> Option<<EntityRefExcept<'a, 'b, B> as WorldQuery>::State>

Attempts to initialize a State for this WorldQuery type using read-only access to Components.

fn matches_component_set( _: &<EntityRefExcept<'a, 'b, B> as WorldQuery>::State, _: &impl Fn(ComponentId) -> bool, ) -> bool

Returns true if this query matches a set of components. Otherwise, returns false.

fn init_nested_access( _state: &Self::State, _system_name: Option<&str>, _component_access_set: &mut FilteredAccessSet, _world: UnsafeWorldCell<'_>, )

Adds any component accesses to other entities used by this WorldQuery.

fn update_archetypes(_state: &mut Self::State, _world: UnsafeWorldCell<'_>)

Called when the query state is updating its archetype cache. This can be used by nested queries to update their internal archetype caches.

impl<B> ArchetypeQueryData for EntityRefExcept<'_, '_, B>

where B: Bundle,

impl<B> Copy for EntityRefExcept<'_, '_, B>

where B: Bundle,

impl<B> EntityEquivalent for EntityRefExcept<'_, '_, B>

where B: Bundle,

impl<B> Eq for EntityRefExcept<'_, '_, B>

where B: Bundle,

impl<B> IterQueryData for EntityRefExcept<'_, '_, B>

where B: Bundle,

impl<B> ReadOnlyQueryData for EntityRefExcept<'_, '_, B>

where B: Bundle,

impl<B> SingleEntityQueryData for EntityRefExcept<'_, '_, B>

where B: Bundle,