pub struct ReflectMapEntities { /* private fields */ }
Expand description

For a specific type of component, this maps any fields with values of type Entity to a new world. Since a given Entity ID is only valid for the world it came from, when performing deserialization any stored IDs need to be re-allocated in the destination world.

See SceneEntityMapper and MapEntities for more information.

Implementations§

source§

impl ReflectMapEntities

source

pub fn map_all_entities( &self, world: &mut World, entity_map: &mut HashMap<Entity, Entity, EntityHash> )

A general method for applying MapEntities behavior to all elements in an EntityHashMap<Entity>.

Be mindful in its usage: Works best in situations where the entities in the EntityHashMap<Entity> are newly created, before systems have a chance to add new components. If some of the entities referred to by the EntityHashMap<Entity> might already contain valid entity references, you should use map_entities.

An example of this: A scene can be loaded with Parent components, but then a Parent component can be added to these entities after they have been loaded. If you reload the scene using map_all_entities, those Parent components with already valid entity references could be updated to point at something else entirely.

source

pub fn map_entities( &self, world: &mut World, entity_map: &mut HashMap<Entity, Entity, EntityHash>, entities: &[Entity] )

A general method for applying MapEntities behavior to elements in an EntityHashMap<Entity>. Unlike map_all_entities, this is applied to specific entities, not all values in the EntityHashMap<Entity>.

This is useful mostly for when you need to be careful not to update components that already contain valid entity values. See map_all_entities for more details.

Trait Implementations§

source§

impl Clone for ReflectMapEntities

source§

fn clone(&self) -> ReflectMapEntities

Returns a copy of the value. Read more
1.0.0 · source§

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

Performs copy-assignment from source. Read more
source§

impl<C> FromType<C> for ReflectMapEntities

Auto Trait Implementations§

Blanket Implementations§

source§

impl<T> Any for T
where T: 'static + ?Sized,

source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
source§

impl<T, U> AsBindGroupShaderType<U> for T
where U: ShaderType, &'a T: for<'a> Into<U>,

source§

fn as_bind_group_shader_type(&self, _images: &RenderAssets<Image>) -> U

Return the T ShaderType for self. When used in AsBindGroup derives, it is safe to assume that all images in self exist.
source§

impl<T> Borrow<T> for T
where T: ?Sized,

source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
source§

impl<T> BorrowMut<T> for T
where T: ?Sized,

source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
source§

impl<T> Downcast<T> for T

source§

fn downcast(&self) -> &T

source§

impl<T> Downcast for T
where T: Any,

source§

fn into_any(self: Box<T>) -> Box<dyn Any>

Convert Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>. Box<dyn Any> can then be further downcast into Box<ConcreteType> where ConcreteType implements Trait.
source§

fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>

Convert Rc<Trait> (where Trait: Downcast) to Rc<Any>. Rc<Any> can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait.
source§

fn as_any(&self) -> &(dyn Any + 'static)

Convert &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s.
source§

fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Convert &mut Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &mut Any’s vtable from &mut Trait’s.
source§

impl<T> DowncastSync for T
where T: Any + Send + Sync,

source§

fn into_any_arc(self: Arc<T>) -> Arc<dyn Any + Send + Sync>

Convert Arc<Trait> (where Trait: Downcast) to Arc<Any>. Arc<Any> can then be further downcast into Arc<ConcreteType> where ConcreteType implements Trait.
source§

impl<T> From<T> for T

source§

fn from(t: T) -> T

Returns the argument unchanged.

source§

impl<S> FromSample<S> for S

source§

fn from_sample_(s: S) -> S

source§

impl<T> Instrument for T

source§

fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
source§

fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
source§

impl<T, U> Into<U> for T
where U: From<T>,

source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

source§

impl<T> ToOwned for T
where T: Clone,

§

type Owned = T

The resulting type after obtaining ownership.
source§

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
source§

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
source§

impl<T, U> ToSample<U> for T
where U: FromSample<T>,

source§

fn to_sample_(self) -> U

source§

impl<T, U> TryFrom<U> for T
where U: Into<T>,

§

type Error = Infallible

The type returned in the event of a conversion error.
source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
source§

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

§

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
source§

impl<T> TypeData for T
where T: 'static + Send + Sync + Clone,

source§

impl<T> Upcast<T> for T

source§

fn upcast(&self) -> Option<&T>

source§

impl<T> WithSubscriber for T

source§

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
source§

fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
source§

impl<S, T> Duplex<S> for T
where T: FromSample<S> + ToSample<S>,

source§

impl<T> Settings for T
where T: 'static + Send + Sync,

source§

impl<T> WasmNotSend for T
where T: Send,

source§

impl<T> WasmNotSendSync for T

source§

impl<T> WasmNotSync for T
where T: Sync,