Trait Resource 

pub trait Resource:
    Send
    + Sync
    + 'static { }

A type that can be inserted into a World as a singleton.

You can access resource data in systems using the Res and ResMut system parameters

Only one resource of each type can be stored in a World at any given time.

Examples

#[derive(Resource)]
struct MyResource { value: u32 }

world.insert_resource(MyResource { value: 42 });

fn read_resource_system(resource: Res<MyResource>) {
    assert_eq!(resource.value, 42);
}

fn write_resource_system(mut resource: ResMut<MyResource>) {
    assert_eq!(resource.value, 42);
    resource.value = 0;
    assert_eq!(resource.value, 0);
}

Implementations on Foreign Types

impl Resource for TimeUpdateStrategy

where TimeUpdateStrategy: Send + Sync + 'static,

impl Resource for ScheduleRunnerSettings

where ScheduleRunnerSettings: Send + Sync + 'static,

impl Resource for FrameCount

where FrameCount: Send + Sync + 'static,

impl Resource for Diagnostics

where Diagnostics: Send + Sync + 'static,

impl Resource for GamepadSettings

where GamepadSettings: Send + Sync + 'static,

impl Resource for FixedTimesteps

where FixedTimesteps: Send + Sync + 'static,

impl Resource for TimeReceiver

where TimeReceiver: Send + Sync + 'static,

impl Resource for TimeSender

where TimeSender: Send + Sync + 'static,

impl<T> Resource for ReportHierarchyIssue<T>

where ReportHierarchyIssue<T>: Send + Sync + 'static,

Implementors

impl Resource for UpdateStatus

where Self: Send + Sync + 'static,

impl Resource for ReportExecutionOrderAmbiguities

where ReportExecutionOrderAmbiguities: Send + Sync + 'static,

impl Resource for AppTypeRegistry

where AppTypeRegistry: Send + Sync + 'static,

impl Resource for Gamepads

where Gamepads: Send + Sync + 'static,

impl Resource for TaskPoolOptions

where TaskPoolOptions: Send + Sync + 'static,

impl Resource for Time

where Time: Send + Sync + 'static,

impl Resource for Touches

where Touches: Send + Sync + 'static,

impl Resource for Windows

where Windows: Send + Sync + 'static,

impl<E> Resource for Events<E>

where E: Event, Events<E>: Send + Sync + 'static,

impl<T> Resource for Axis<T>

where Axis<T>: Send + Sync + 'static,

impl<T> Resource for Input<T>

where T: Copy + Eq + Hash + Send + Sync + 'static, Input<T>: Send + Sync + 'static,

impl<T> Resource for State<T>

where T: StateData, State<T>: Send + Sync + 'static,