Loaded

Struct Loaded 

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pub struct Loaded(/* private fields */);
Expand description

A Resource available during SaveStage::PostLoad which contains a mapping of previously saved entities to new loaded entities.

§Usage

When a world is loaded, there can be no guarantee that the index of loaded entities match their saved values. This is because there may already be entities spawned with those indices that do not interact with the save system. This can cause issues with any loaded components which reference entities, since all saved references are invalidated upon load.

To solve this, the Loaded resource may be used to update any entity references during SaveStage::PostLoad. This resource is added to world during this stage and it contains the previously saved index of the loaded entities. Any type which references entities can update its references using this resource.

This can be done more conveniently by implementing the FromLoaded trait for components which reference entities.

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impl Loaded

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pub fn entity(&self, entity: Entity) -> Option<Entity>

Trait Implementations§

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impl Resource for Loaded
where Self: Send + Sync + 'static,

Auto Trait Implementations§

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impl Freeze for Loaded

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impl RefUnwindSafe for Loaded

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impl Send for Loaded

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impl Sync for Loaded

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impl Unpin for Loaded

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impl UnwindSafe for Loaded

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T, U> AsBindGroupShaderType<U> for T
where U: ShaderType, &'a T: for<'a> Into<U>,

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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.
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impl<T> Borrow<T> for T
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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
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fn borrow_mut(&mut self) -> &mut T

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

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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.
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Convert Rc<Trait> (where Trait: Downcast) to Rc<Any>. Rc<Any> can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait.
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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.
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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.
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Convert Arc<Trait> (where Trait: Downcast) to Arc<Any>. Arc<Any> can then be further downcast into Arc<ConcreteType> where ConcreteType implements Trait.
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const WITNESS: W = W::MAKE

A constant of the type witness
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const TYPE_EQ: TypeEq<T, <T as Identity>::Type> = TypeEq::NEW

Proof that Self is the same type as Self::Type, provides methods for casting between Self and Self::Type.
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type Type = T

The same type as Self, used to emulate type equality bounds (T == U) with associated type equality constraints (T: Identity<Type = U>).
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Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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Calls U::from(self).

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type Error = Infallible

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

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