Lib.rs

此crate提供了一种简单易用的方式来创建仅对单个实体操作的系统。

#[derive(Component)]
struct MyMarkerComponent;

fn my_entity_system(data: Data<&mut Transform, With<MyMarkerComponent>>, mut commands: Commands) {
    *data.item += 10;
    commands.spawn(Transform::from_translation(data.item.translation));
}

fn my_entity_system_with_input(input: In<Vec2>, data: Data<&mut Transform>) {
    *data.item += input;
}

app.add_systems(Update, (
    my_entity_system.into_system(), 
    my_entity_system_with_input.into_system()
));

lib.rs:

此crate提供了一种简单易用的方式来创建仅对单个实体操作的系统。

#[derive(Component)]
struct Count(i32);

#[derive(Component)]
struct MyMarkerComponent;

fn my_entity_system(
    mut data: Data<&mut Count, With<MyMarkerComponent>>,
    mut commands: Commands
) {
    data.item.0 += 1;
    commands.spawn(Count(10));
}

fn my_entity_system_with_input(input: In<i32>, mut data: Data<&mut Count>) {
    data.item.0 += *input;
}

bevy_ecs::system::assert_is_system(my_entity_system.into_system());
bevy_ecs::system::assert_is_system(my_entity_system_with_input.into_system());