Struct ViewQuery 

pub struct ViewQuery<'w, 's, D: QueryData, F: QueryFilter = ()> { /* private fields */ }

A query that fetches components for the entity corresponding to the current view being rendered, as defined by the CurrentView resource, equivalent to query.get(current_view.entity()).

Implementations

impl<'w, 's, D: QueryData, F: QueryFilter> ViewQuery<'w, 's, D, F>

pub fn entity(&self) -> Entity

pub fn into_inner(self) -> D::Item<'w, 's>

Trait Implementations

impl<'a, D: QueryData + 'static, F: QueryFilter + 'static> SystemParam for ViewQuery<'a, '_, D, F>

type State = ViewQueryState<D, F>

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

type Item<'w, 's> = ViewQuery<'w, 's, D, F>

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) -> Self::State

Creates a new instance of this param’s State.

fn init_access( state: &Self::State, system_meta: &mut SystemMeta, component_access_set: &mut FilteredAccessSet, world: &mut World, )

Registers any World access used by this SystemParam.

unsafe fn get_param<'w, 's>( state: &'s mut Self::State, _system_meta: &SystemMeta, world: UnsafeWorldCell<'w>, _change_tick: Tick, ) -> Result<Self::Item<'w, 's>, SystemParamValidationError>

Creates a parameter to be passed into a SystemParamFunction.

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 ApplyDeferred.

fn queue( state: &mut Self::State, system_meta: &SystemMeta, world: DeferredWorld<'_>, )

Queues any deferred mutations to be applied at the next ApplyDeferred.

impl<'w, 's, D: ReadOnlyQueryData + 'static, F: QueryFilter + 'static> ReadOnlySystemParam for ViewQuery<'w, 's, D, F>