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

Stores the RemovedComponents event buffers for all types of component in a given World.

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impl RemovedComponentEvents

pub fn new() -> RemovedComponentEvents

Creates an empty storage buffer for component removal events.

pub fn update(&mut self)

For each type of component, swaps the event buffers and clears the oldest event buffer. In general, this should be called once per frame/update.

pub fn get( &self, component_id: impl Into<ComponentId> ) -> Option<&Events<RemovedComponentEntity>>

Gets the event storage for a given component.

pub fn send(&mut self, component_id: impl Into<ComponentId>, entity: Entity)

Sends a removal event for the specified component.

Trait Implementations§

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impl Debug for RemovedComponentEvents

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fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
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impl Default for RemovedComponentEvents

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fn default() -> RemovedComponentEvents

Returns the “default value” for a type. Read more
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impl<'a> SystemParam for &'a RemovedComponentEvents

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type State = ()

Used to store data which persists across invocations of a system.
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type Item<'w, 's> = &'w RemovedComponentEvents

The item type returned when constructing this system param. The value of this associated type should be Self, instantiated with new lifetimes. Read more
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fn init_state( _world: &mut World, _system_meta: &mut SystemMeta ) -> <&'a RemovedComponentEvents as SystemParam>::State

Registers any World access used by this SystemParam and creates a new instance of this param’s State.
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unsafe fn get_param<'w, 's>( _state: &'s mut <&'a RemovedComponentEvents as SystemParam>::State, _system_meta: &SystemMeta, world: UnsafeWorldCell<'w>, _change_tick: Tick ) -> <&'a RemovedComponentEvents as SystemParam>::Item<'w, 's>

Creates a parameter to be passed into a SystemParamFunction. Read more
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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).
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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.
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impl<'a> ReadOnlySystemParam for &'a RemovedComponentEvents

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Creates Self using data from the given World.
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