Trait bevy::render::extract_instances::ExtractInstance

pub trait ExtractInstance: Send + Sync + Sized + 'static {
    type Query: WorldQuery + ReadOnlyWorldQuery;
    type Filter: WorldQuery + ReadOnlyWorldQuery;

    // Required method
    fn extract(item: <Self::Query as WorldQuery>::Item<'_>) -> Option<Self>;
}

Describes how to extract data needed for rendering from a component or components.

Before rendering, any applicable components will be transferred from the main world to the render world in the ExtractSchedule step.

This is essentially the same as ExtractComponent, but higher-performance because it avoids the ECS overhead.

Required Associated Types

type Query: WorldQuery + ReadOnlyWorldQuery

ECS WorldQuery to fetch the components to extract.

type Filter: WorldQuery + ReadOnlyWorldQuery

Filters the entities with additional constraints.

Required Methods

fn extract(item: <Self::Query as WorldQuery>::Item<'_>) -> Option<Self>

Defines how the component is transferred into the “render world”.

Object Safety

This trait is not object safe.

Implementors

impl<A> ExtractInstance for AssetId<A>where A: Asset,

type Query = &'static Handle<A>

type Filter = ()