Struct ParamSet 

pub struct ParamSet<'w, 's, T>
where
    T: SystemParam,
{ /* private fields */ }

A collection of potentially conflicting SystemParams allowed by disjoint access.

Allows systems to safely access and interact with up to 8 mutually exclusive SystemParams, such as two queries that reference the same mutable data or an event reader and writer of the same type.

Each individual SystemParam can be accessed by using the functions p0(), p1(), …, p7(), according to the order they are defined in the ParamSet. This ensures that there’s either only one mutable reference to a parameter at a time or any number of immutable references.

Examples

The following system mutably accesses the same component two times, which is not allowed due to rust’s mutability rules.

// This will panic at runtime when the system gets initialized.
fn bad_system(
    mut enemies: Query<&mut Health, With<Enemy>>,
    mut allies: Query<&mut Health, With<Ally>>,
) {
    // ...
}

Conflicting SystemParams like these can be placed in a ParamSet, which leverages the borrow checker to ensure that only one of the contained parameters are accessed at a given time.

// Given the following system
fn fancy_system(
    mut set: ParamSet<(
        Query<&mut Health, With<Enemy>>,
        Query<&mut Health, With<Ally>>,
    )>
) {
    // This will access the first `SystemParam`.
    for mut health in set.p0().iter_mut() {
        // Do your fancy stuff here...
    }

    // The second `SystemParam`.
    // This would fail to compile if the previous parameter was still borrowed.
    for mut health in set.p1().iter_mut() {
        // Do even fancier stuff here...
    }
}

Of course, ParamSets can be used with any kind of SystemParam, not just queries.

fn message_system(
    mut set: ParamSet<(
        // PROBLEM: `MessageReader` and `MessageWriter` cannot be used together normally,
        // because they both need access to the same message queue.
        // SOLUTION: `ParamSet` allows these conflicting parameters to be used safely
        // by ensuring only one is accessed at a time.
        // Note that a better solution here is to use `MessageMutator`,
        // which both reads and writes messages with a single parameter.
        MessageReader<MyMessage>,
        MessageWriter<MyMessage>,
        // PROBLEM: `&World` needs read access to everything, which conflicts with
        // any mutable access in the same system.
        // SOLUTION: `ParamSet` ensures `&World` is only accessed when we're not
        // using the other mutable parameters.
        &World,
    )>,
) {
    for message in set.p0().read() {
        // ...
    }
    set.p1().write(MyMessage::new());

    let entities = set.p2().entities();
    // ...
}

Implementations

impl<'w, 's, P0> ParamSet<'w, 's, (P0,)>

where P0: SystemParam,

pub fn p0<'a>(&'a mut self) -> <P0 as SystemParam>::Item<'a, 'a>

Gets exclusive access to the parameter at index 0 in this ParamSet. No other parameters may be accessed while this one is active.

impl<'w, 's, P0, P1> ParamSet<'w, 's, (P0, P1)>

where P0: SystemParam, P1: SystemParam,

pub fn p0<'a>(&'a mut self) -> <P0 as SystemParam>::Item<'a, 'a>

Gets exclusive access to the parameter at index 0 in this ParamSet. No other parameters may be accessed while this one is active.

Examples found in repository

examples/showcase/alien_cake_addict.rs (line 304)

fn focus_camera(
    time: Res<Time>,
    mut game: ResMut<Game>,
    mut transforms: ParamSet<(Query<&mut Transform, With<Camera3d>>, Query<&Transform>)>,
) {
    const SPEED: f32 = 2.0;
    // if there is both a player and a bonus, target the mid-point of them
    if let (Some(player_entity), Some(bonus_entity)) = (game.player.entity, game.bonus.entity) {
        let transform_query = transforms.p1();
        if let (Ok(player_transform), Ok(bonus_transform)) = (
            transform_query.get(player_entity),
            transform_query.get(bonus_entity),
        ) {
            game.camera_should_focus = player_transform
                .translation
                .lerp(bonus_transform.translation, 0.5);
        }
        // otherwise, if there is only a player, target the player
    } else if let Some(player_entity) = game.player.entity {
        if let Ok(player_transform) = transforms.p1().get(player_entity) {
            game.camera_should_focus = player_transform.translation;
        }
        // otherwise, target the middle
    } else {
        game.camera_should_focus = Vec3::from(RESET_FOCUS);
    }
    // calculate the camera motion based on the difference between where the camera is looking
    // and where it should be looking; the greater the distance, the faster the motion;
    // smooth out the camera movement using the frame time
    let mut camera_motion = game.camera_should_focus - game.camera_is_focus;
    if camera_motion.length() > 0.2 {
        camera_motion *= SPEED * time.delta_secs();
        // set the new camera's actual focus
        game.camera_is_focus += camera_motion;
    }
    // look at that new camera's actual focus
    for mut transform in transforms.p0().iter_mut() {
        *transform = transform.looking_at(game.camera_is_focus, Vec3::Y);
    }
}

examples/ui/text/multiline_text_input.rs (line 167)

fn setup(mut commands: Commands, asset_server: Res<AssetServer>) {
    commands.spawn(Camera2d);

    commands
        .spawn(Node {
            width: percent(100.),
            height: percent(100.),
            justify_content: JustifyContent::Center,
            align_items: AlignItems::Center,
            ..default()
        })
        .with_children(|parent| {
            parent
                .spawn((
                    Node {
                        flex_direction: FlexDirection::Column,
                        align_items: AlignItems::End,
                        row_gap: px(10.),
                        ..default()
                    },
                    TabGroup::default(),
                ))
                .with_children(|parent| {
                    parent
                        .spawn((
                            Node {
                                width: px(450.),
                                border: px(2.).all(),
                                padding: px(8.).all(),
                                ..default()
                            },
                            EditableText {
                                visible_lines: Some(8.),
                                allow_newlines: true,
                                ..default()
                            },
                            TextLayout {
                                linebreak: LineBreak::WordOrCharacter,
                                ..default()
                            },
                            TextCursorStyle {
                                color: Color::WHITE,
                                selected_text_color: Some(Color::BLACK),
                                ..default()
                            },
                            TextFont {
                                font: asset_server.load("fonts/FiraMono-Medium.ttf").into(),
                                font_size: FontSize::Px(30.),
                                ..default()
                            },
                            BackgroundColor(DARK_SLATE_GRAY.into()),
                            BorderColor::all(SLATE_300),
                            MultilineInput,
                            TabIndex(0),
                            AutoFocus,
                        ))
                        .observe(
                            |on: On<FocusedInput<KeyboardInput>>,
                             keys: Res<ButtonInput<Key>>,
                             input_query: Query<&EditableText, With<MultilineInput>>| {
                                if !(on.input.state.is_pressed()
                                    && on.input.logical_key == Key::Enter
                                    && keys.pressed(Key::Control))
                                {
                                    return;
                                }
                                let Ok(input) = input_query.get(on.focused_entity) else {
                                    return;
                                };

                                let mut output = String::new();
                                output.reserve(input.value().into_iter().map(str::len).sum());
                                for sub_str in input.value() {
                                    output.push_str(sub_str);
                                }

                                info!("{output}"                                    );
                            },
                        );

                    parent
                        .spawn((
                            Node {
                                flex_direction: FlexDirection::Row,
                                column_gap: px(10.),
                                ..default()
                            },
                            children![
                                (
                                    Text::new("visible lines:"),
                                    TextFont {
                                        font: asset_server.load("fonts/FiraMono-Medium.ttf").into(),
                                        font_size: FontSize::Px(30.),
                                        ..default()
                                    },
                                ),
                                (
                                    Node {
                                        width: px(100.),
                                        border: px(2.).all(),
                                        ..default()
                                    },
                                    TextFont {
                                        font: asset_server.load("fonts/FiraMono-Medium.ttf").into(),
                                        font_size: FontSize::Px(30.),
                                        ..default()
                                    },
                                    TextLayout {
                                        justify: Justify::End,
                                        ..default()
                                    },
                                    BackgroundColor(DARK_SLATE_GRAY.into()),
                                    BorderColor::all(SLATE_300),
                                    EditableText::new("8"),
                                    EditableTextFilter::new(|c| c.is_ascii_digit() || c == '.'),
                                    TextCursorStyle {
                                        color: Color::WHITE,
                                        selected_text_color: Some(Color::BLACK),
                                        unfocused_selection_color: Color::NONE,
                                        ..default()
                                    },
                                    SelectAllOnFocus,
                                    VisibleLinesInput,
                                    TabIndex(1),
                                )
                            ],
                        ))
                        .observe(
                            |on: On<FocusedInput<KeyboardInput>>,
                             mut query_set: ParamSet<(
                                Query<&EditableText, With<VisibleLinesInput>>,
                                Query<&mut EditableText, With<MultilineInput>>,
                            )>| {
                                if !(on.input.state.is_pressed()
                                    && on.input.logical_key == Key::Enter)
                                {
                                    return;
                                }

                                let visible_lines_query = query_set.p0();
                                let Ok(input) = visible_lines_query.get(on.original_event_target())
                                else {
                                    return;
                                };

                                let mut output = String::new();
                                output.reserve(input.value().into_iter().map(str::len).sum());
                                for sub_str in input.value() {
                                    output.push_str(sub_str);
                                }

                                let Ok(lines) = output.parse::<f32>() else {
                                    return;
                                };

                                let mut multiline_query = query_set.p1();
                                let Ok(mut multiline_input) = multiline_query.single_mut() else {
                                    return;
                                };

                                multiline_input.visible_lines = Some(lines.clamp(1., 10.));
                            },
                        );

                    parent
                        .spawn((
                            Node {
                                flex_direction: FlexDirection::Row,
                                column_gap: px(10.),
                                ..default()
                            },
                            children![
                                (
                                    Text::new("font size:"),
                                    TextFont {
                                        font: asset_server.load("fonts/FiraMono-Medium.ttf").into(),
                                        font_size: FontSize::Px(30.),
                                        ..default()
                                    },
                                ),
                                (
                                    Node {
                                        width: px(100.),
                                        border: px(2.).all(),
                                        ..default()
                                    },
                                    TextFont {
                                        font: asset_server.load("fonts/FiraMono-Medium.ttf").into(),
                                        font_size: FontSize::Px(30.),
                                        ..default()
                                    },
                                    TextLayout {
                                        justify: Justify::End,
                                        ..default()
                                    },
                                    BackgroundColor(DARK_SLATE_GRAY.into()),
                                    BorderColor::all(SLATE_300),
                                    EditableText::new("30"),
                                    EditableTextFilter::new(|c| c.is_ascii_digit()),
                                    TextCursorStyle {
                                        color: Color::WHITE,
                                        selected_text_color: Some(Color::BLACK),
                                        unfocused_selection_color: Color::NONE,
                                        ..default()
                                    },
                                    SelectAllOnFocus,
                                    FontSizeInput,
                                    TabIndex(2),
                                )
                            ],
                        ))
                        .observe(
                            |on: On<FocusedInput<KeyboardInput>>,
                             font_size_input_query: Query<&EditableText, With<FontSizeInput>>,
                             mut multiline_input_font: Single<
                                &mut TextFont,
                                With<MultilineInput>,
                            >| {
                                if !(on.input.state.is_pressed()
                                    && on.input.logical_key == Key::Enter)
                                {
                                    return;
                                }

                                let Ok(input) =
                                    font_size_input_query.get(on.original_event_target())
                                else {
                                    return;
                                };

                                let mut output = String::new();
                                output.reserve(input.value().into_iter().map(str::len).sum());
                                for sub_str in input.value() {
                                    output.push_str(sub_str);
                                }

                                let Ok(font_size) = output.parse::<f32>() else {
                                    return;
                                };

                                multiline_input_font.font_size =
                                    FontSize::Px(font_size.clamp(5., 50.));
                            },
                        );
                });
        });
}

pub fn p1<'a>(&'a mut self) -> <P1 as SystemParam>::Item<'a, 'a>

Gets exclusive access to the parameter at index 1 in this ParamSet. No other parameters may be accessed while this one is active.

Examples found in repository

examples/showcase/alien_cake_addict.rs (line 276)

fn focus_camera(
    time: Res<Time>,
    mut game: ResMut<Game>,
    mut transforms: ParamSet<(Query<&mut Transform, With<Camera3d>>, Query<&Transform>)>,
) {
    const SPEED: f32 = 2.0;
    // if there is both a player and a bonus, target the mid-point of them
    if let (Some(player_entity), Some(bonus_entity)) = (game.player.entity, game.bonus.entity) {
        let transform_query = transforms.p1();
        if let (Ok(player_transform), Ok(bonus_transform)) = (
            transform_query.get(player_entity),
            transform_query.get(bonus_entity),
        ) {
            game.camera_should_focus = player_transform
                .translation
                .lerp(bonus_transform.translation, 0.5);
        }
        // otherwise, if there is only a player, target the player
    } else if let Some(player_entity) = game.player.entity {
        if let Ok(player_transform) = transforms.p1().get(player_entity) {
            game.camera_should_focus = player_transform.translation;
        }
        // otherwise, target the middle
    } else {
        game.camera_should_focus = Vec3::from(RESET_FOCUS);
    }
    // calculate the camera motion based on the difference between where the camera is looking
    // and where it should be looking; the greater the distance, the faster the motion;
    // smooth out the camera movement using the frame time
    let mut camera_motion = game.camera_should_focus - game.camera_is_focus;
    if camera_motion.length() > 0.2 {
        camera_motion *= SPEED * time.delta_secs();
        // set the new camera's actual focus
        game.camera_is_focus += camera_motion;
    }
    // look at that new camera's actual focus
    for mut transform in transforms.p0().iter_mut() {
        *transform = transform.looking_at(game.camera_is_focus, Vec3::Y);
    }
}

examples/ui/text/multiline_text_input.rs (line 183)

fn setup(mut commands: Commands, asset_server: Res<AssetServer>) {
    commands.spawn(Camera2d);

    commands
        .spawn(Node {
            width: percent(100.),
            height: percent(100.),
            justify_content: JustifyContent::Center,
            align_items: AlignItems::Center,
            ..default()
        })
        .with_children(|parent| {
            parent
                .spawn((
                    Node {
                        flex_direction: FlexDirection::Column,
                        align_items: AlignItems::End,
                        row_gap: px(10.),
                        ..default()
                    },
                    TabGroup::default(),
                ))
                .with_children(|parent| {
                    parent
                        .spawn((
                            Node {
                                width: px(450.),
                                border: px(2.).all(),
                                padding: px(8.).all(),
                                ..default()
                            },
                            EditableText {
                                visible_lines: Some(8.),
                                allow_newlines: true,
                                ..default()
                            },
                            TextLayout {
                                linebreak: LineBreak::WordOrCharacter,
                                ..default()
                            },
                            TextCursorStyle {
                                color: Color::WHITE,
                                selected_text_color: Some(Color::BLACK),
                                ..default()
                            },
                            TextFont {
                                font: asset_server.load("fonts/FiraMono-Medium.ttf").into(),
                                font_size: FontSize::Px(30.),
                                ..default()
                            },
                            BackgroundColor(DARK_SLATE_GRAY.into()),
                            BorderColor::all(SLATE_300),
                            MultilineInput,
                            TabIndex(0),
                            AutoFocus,
                        ))
                        .observe(
                            |on: On<FocusedInput<KeyboardInput>>,
                             keys: Res<ButtonInput<Key>>,
                             input_query: Query<&EditableText, With<MultilineInput>>| {
                                if !(on.input.state.is_pressed()
                                    && on.input.logical_key == Key::Enter
                                    && keys.pressed(Key::Control))
                                {
                                    return;
                                }
                                let Ok(input) = input_query.get(on.focused_entity) else {
                                    return;
                                };

                                let mut output = String::new();
                                output.reserve(input.value().into_iter().map(str::len).sum());
                                for sub_str in input.value() {
                                    output.push_str(sub_str);
                                }

                                info!("{output}"                                    );
                            },
                        );

                    parent
                        .spawn((
                            Node {
                                flex_direction: FlexDirection::Row,
                                column_gap: px(10.),
                                ..default()
                            },
                            children![
                                (
                                    Text::new("visible lines:"),
                                    TextFont {
                                        font: asset_server.load("fonts/FiraMono-Medium.ttf").into(),
                                        font_size: FontSize::Px(30.),
                                        ..default()
                                    },
                                ),
                                (
                                    Node {
                                        width: px(100.),
                                        border: px(2.).all(),
                                        ..default()
                                    },
                                    TextFont {
                                        font: asset_server.load("fonts/FiraMono-Medium.ttf").into(),
                                        font_size: FontSize::Px(30.),
                                        ..default()
                                    },
                                    TextLayout {
                                        justify: Justify::End,
                                        ..default()
                                    },
                                    BackgroundColor(DARK_SLATE_GRAY.into()),
                                    BorderColor::all(SLATE_300),
                                    EditableText::new("8"),
                                    EditableTextFilter::new(|c| c.is_ascii_digit() || c == '.'),
                                    TextCursorStyle {
                                        color: Color::WHITE,
                                        selected_text_color: Some(Color::BLACK),
                                        unfocused_selection_color: Color::NONE,
                                        ..default()
                                    },
                                    SelectAllOnFocus,
                                    VisibleLinesInput,
                                    TabIndex(1),
                                )
                            ],
                        ))
                        .observe(
                            |on: On<FocusedInput<KeyboardInput>>,
                             mut query_set: ParamSet<(
                                Query<&EditableText, With<VisibleLinesInput>>,
                                Query<&mut EditableText, With<MultilineInput>>,
                            )>| {
                                if !(on.input.state.is_pressed()
                                    && on.input.logical_key == Key::Enter)
                                {
                                    return;
                                }

                                let visible_lines_query = query_set.p0();
                                let Ok(input) = visible_lines_query.get(on.original_event_target())
                                else {
                                    return;
                                };

                                let mut output = String::new();
                                output.reserve(input.value().into_iter().map(str::len).sum());
                                for sub_str in input.value() {
                                    output.push_str(sub_str);
                                }

                                let Ok(lines) = output.parse::<f32>() else {
                                    return;
                                };

                                let mut multiline_query = query_set.p1();
                                let Ok(mut multiline_input) = multiline_query.single_mut() else {
                                    return;
                                };

                                multiline_input.visible_lines = Some(lines.clamp(1., 10.));
                            },
                        );

                    parent
                        .spawn((
                            Node {
                                flex_direction: FlexDirection::Row,
                                column_gap: px(10.),
                                ..default()
                            },
                            children![
                                (
                                    Text::new("font size:"),
                                    TextFont {
                                        font: asset_server.load("fonts/FiraMono-Medium.ttf").into(),
                                        font_size: FontSize::Px(30.),
                                        ..default()
                                    },
                                ),
                                (
                                    Node {
                                        width: px(100.),
                                        border: px(2.).all(),
                                        ..default()
                                    },
                                    TextFont {
                                        font: asset_server.load("fonts/FiraMono-Medium.ttf").into(),
                                        font_size: FontSize::Px(30.),
                                        ..default()
                                    },
                                    TextLayout {
                                        justify: Justify::End,
                                        ..default()
                                    },
                                    BackgroundColor(DARK_SLATE_GRAY.into()),
                                    BorderColor::all(SLATE_300),
                                    EditableText::new("30"),
                                    EditableTextFilter::new(|c| c.is_ascii_digit()),
                                    TextCursorStyle {
                                        color: Color::WHITE,
                                        selected_text_color: Some(Color::BLACK),
                                        unfocused_selection_color: Color::NONE,
                                        ..default()
                                    },
                                    SelectAllOnFocus,
                                    FontSizeInput,
                                    TabIndex(2),
                                )
                            ],
                        ))
                        .observe(
                            |on: On<FocusedInput<KeyboardInput>>,
                             font_size_input_query: Query<&EditableText, With<FontSizeInput>>,
                             mut multiline_input_font: Single<
                                &mut TextFont,
                                With<MultilineInput>,
                            >| {
                                if !(on.input.state.is_pressed()
                                    && on.input.logical_key == Key::Enter)
                                {
                                    return;
                                }

                                let Ok(input) =
                                    font_size_input_query.get(on.original_event_target())
                                else {
                                    return;
                                };

                                let mut output = String::new();
                                output.reserve(input.value().into_iter().map(str::len).sum());
                                for sub_str in input.value() {
                                    output.push_str(sub_str);
                                }

                                let Ok(font_size) = output.parse::<f32>() else {
                                    return;
                                };

                                multiline_input_font.font_size =
                                    FontSize::Px(font_size.clamp(5., 50.));
                            },
                        );
                });
        });
}

impl<'w, 's, P0, P1, P2> ParamSet<'w, 's, (P0, P1, P2)>

where P0: SystemParam, P1: SystemParam, P2: SystemParam,

pub fn p0<'a>(&'a mut self) -> <P0 as SystemParam>::Item<'a, 'a>

Gets exclusive access to the parameter at index 0 in this ParamSet. No other parameters may be accessed while this one is active.

pub fn p1<'a>(&'a mut self) -> <P1 as SystemParam>::Item<'a, 'a>

Gets exclusive access to the parameter at index 1 in this ParamSet. No other parameters may be accessed while this one is active.

pub fn p2<'a>(&'a mut self) -> <P2 as SystemParam>::Item<'a, 'a>

Gets exclusive access to the parameter at index 2 in this ParamSet. No other parameters may be accessed while this one is active.

impl<'w, 's, P0, P1, P2, P3> ParamSet<'w, 's, (P0, P1, P2, P3)>

where P0: SystemParam, P1: SystemParam, P2: SystemParam, P3: SystemParam,

pub fn p0<'a>(&'a mut self) -> <P0 as SystemParam>::Item<'a, 'a>

Gets exclusive access to the parameter at index 0 in this ParamSet. No other parameters may be accessed while this one is active.

Examples found in repository

examples/3d/shadow_caster_receiver.rs (line 144)

fn toggle_shadows(
    mut commands: Commands,
    input: Res<ButtonInput<KeyCode>>,
    mut queries: ParamSet<(
        Query<Entity, (With<Mesh3d>, With<NotShadowCaster>)>,
        Query<Entity, (With<Mesh3d>, With<NotShadowReceiver>)>,
        Query<Entity, (With<Mesh3d>, Without<NotShadowCaster>)>,
        Query<Entity, (With<Mesh3d>, Without<NotShadowReceiver>)>,
    )>,
) {
    if input.just_pressed(KeyCode::KeyC) {
        println!("Toggling casters");
        for entity in queries.p0().iter() {
            commands.entity(entity).remove::<NotShadowCaster>();
        }
        for entity in queries.p2().iter() {
            commands.entity(entity).insert(NotShadowCaster);
        }
    }
    if input.just_pressed(KeyCode::KeyR) {
        println!("Toggling receivers");
        for entity in queries.p1().iter() {
            commands.entity(entity).remove::<NotShadowReceiver>();
        }
        for entity in queries.p3().iter() {
            commands.entity(entity).insert(NotShadowReceiver);
        }
    }
}

pub fn p1<'a>(&'a mut self) -> <P1 as SystemParam>::Item<'a, 'a>

Gets exclusive access to the parameter at index 1 in this ParamSet. No other parameters may be accessed while this one is active.

Examples found in repository

examples/3d/shadow_caster_receiver.rs (line 153)

fn toggle_shadows(
    mut commands: Commands,
    input: Res<ButtonInput<KeyCode>>,
    mut queries: ParamSet<(
        Query<Entity, (With<Mesh3d>, With<NotShadowCaster>)>,
        Query<Entity, (With<Mesh3d>, With<NotShadowReceiver>)>,
        Query<Entity, (With<Mesh3d>, Without<NotShadowCaster>)>,
        Query<Entity, (With<Mesh3d>, Without<NotShadowReceiver>)>,
    )>,
) {
    if input.just_pressed(KeyCode::KeyC) {
        println!("Toggling casters");
        for entity in queries.p0().iter() {
            commands.entity(entity).remove::<NotShadowCaster>();
        }
        for entity in queries.p2().iter() {
            commands.entity(entity).insert(NotShadowCaster);
        }
    }
    if input.just_pressed(KeyCode::KeyR) {
        println!("Toggling receivers");
        for entity in queries.p1().iter() {
            commands.entity(entity).remove::<NotShadowReceiver>();
        }
        for entity in queries.p3().iter() {
            commands.entity(entity).insert(NotShadowReceiver);
        }
    }
}

pub fn p2<'a>(&'a mut self) -> <P2 as SystemParam>::Item<'a, 'a>

Gets exclusive access to the parameter at index 2 in this ParamSet. No other parameters may be accessed while this one is active.

Examples found in repository

examples/3d/shadow_caster_receiver.rs (line 147)

fn toggle_shadows(
    mut commands: Commands,
    input: Res<ButtonInput<KeyCode>>,
    mut queries: ParamSet<(
        Query<Entity, (With<Mesh3d>, With<NotShadowCaster>)>,
        Query<Entity, (With<Mesh3d>, With<NotShadowReceiver>)>,
        Query<Entity, (With<Mesh3d>, Without<NotShadowCaster>)>,
        Query<Entity, (With<Mesh3d>, Without<NotShadowReceiver>)>,
    )>,
) {
    if input.just_pressed(KeyCode::KeyC) {
        println!("Toggling casters");
        for entity in queries.p0().iter() {
            commands.entity(entity).remove::<NotShadowCaster>();
        }
        for entity in queries.p2().iter() {
            commands.entity(entity).insert(NotShadowCaster);
        }
    }
    if input.just_pressed(KeyCode::KeyR) {
        println!("Toggling receivers");
        for entity in queries.p1().iter() {
            commands.entity(entity).remove::<NotShadowReceiver>();
        }
        for entity in queries.p3().iter() {
            commands.entity(entity).insert(NotShadowReceiver);
        }
    }
}

pub fn p3<'a>(&'a mut self) -> <P3 as SystemParam>::Item<'a, 'a>

Gets exclusive access to the parameter at index 3 in this ParamSet. No other parameters may be accessed while this one is active.

Examples found in repository

examples/3d/shadow_caster_receiver.rs (line 156)

fn toggle_shadows(
    mut commands: Commands,
    input: Res<ButtonInput<KeyCode>>,
    mut queries: ParamSet<(
        Query<Entity, (With<Mesh3d>, With<NotShadowCaster>)>,
        Query<Entity, (With<Mesh3d>, With<NotShadowReceiver>)>,
        Query<Entity, (With<Mesh3d>, Without<NotShadowCaster>)>,
        Query<Entity, (With<Mesh3d>, Without<NotShadowReceiver>)>,
    )>,
) {
    if input.just_pressed(KeyCode::KeyC) {
        println!("Toggling casters");
        for entity in queries.p0().iter() {
            commands.entity(entity).remove::<NotShadowCaster>();
        }
        for entity in queries.p2().iter() {
            commands.entity(entity).insert(NotShadowCaster);
        }
    }
    if input.just_pressed(KeyCode::KeyR) {
        println!("Toggling receivers");
        for entity in queries.p1().iter() {
            commands.entity(entity).remove::<NotShadowReceiver>();
        }
        for entity in queries.p3().iter() {
            commands.entity(entity).insert(NotShadowReceiver);
        }
    }
}

impl<'w, 's, P0, P1, P2, P3, P4> ParamSet<'w, 's, (P0, P1, P2, P3, P4)>

where P0: SystemParam, P1: SystemParam, P2: SystemParam, P3: SystemParam, P4: SystemParam,

pub fn p0<'a>(&'a mut self) -> <P0 as SystemParam>::Item<'a, 'a>

Gets exclusive access to the parameter at index 0 in this ParamSet. No other parameters may be accessed while this one is active.

pub fn p1<'a>(&'a mut self) -> <P1 as SystemParam>::Item<'a, 'a>

Gets exclusive access to the parameter at index 1 in this ParamSet. No other parameters may be accessed while this one is active.

pub fn p2<'a>(&'a mut self) -> <P2 as SystemParam>::Item<'a, 'a>

Gets exclusive access to the parameter at index 2 in this ParamSet. No other parameters may be accessed while this one is active.

pub fn p3<'a>(&'a mut self) -> <P3 as SystemParam>::Item<'a, 'a>

Gets exclusive access to the parameter at index 3 in this ParamSet. No other parameters may be accessed while this one is active.

pub fn p4<'a>(&'a mut self) -> <P4 as SystemParam>::Item<'a, 'a>

Gets exclusive access to the parameter at index 4 in this ParamSet. No other parameters may be accessed while this one is active.

impl<'w, 's, P0, P1, P2, P3, P4, P5> ParamSet<'w, 's, (P0, P1, P2, P3, P4, P5)>

where P0: SystemParam, P1: SystemParam, P2: SystemParam, P3: SystemParam, P4: SystemParam, P5: SystemParam,

pub fn p0<'a>(&'a mut self) -> <P0 as SystemParam>::Item<'a, 'a>

Gets exclusive access to the parameter at index 0 in this ParamSet. No other parameters may be accessed while this one is active.

pub fn p1<'a>(&'a mut self) -> <P1 as SystemParam>::Item<'a, 'a>

Gets exclusive access to the parameter at index 1 in this ParamSet. No other parameters may be accessed while this one is active.

pub fn p2<'a>(&'a mut self) -> <P2 as SystemParam>::Item<'a, 'a>

Gets exclusive access to the parameter at index 2 in this ParamSet. No other parameters may be accessed while this one is active.

pub fn p3<'a>(&'a mut self) -> <P3 as SystemParam>::Item<'a, 'a>

Gets exclusive access to the parameter at index 3 in this ParamSet. No other parameters may be accessed while this one is active.

pub fn p4<'a>(&'a mut self) -> <P4 as SystemParam>::Item<'a, 'a>

Gets exclusive access to the parameter at index 4 in this ParamSet. No other parameters may be accessed while this one is active.

pub fn p5<'a>(&'a mut self) -> <P5 as SystemParam>::Item<'a, 'a>

Gets exclusive access to the parameter at index 5 in this ParamSet. No other parameters may be accessed while this one is active.

impl<'w, 's, P0, P1, P2, P3, P4, P5, P6> ParamSet<'w, 's, (P0, P1, P2, P3, P4, P5, P6)>

where P0: SystemParam, P1: SystemParam, P2: SystemParam, P3: SystemParam, P4: SystemParam, P5: SystemParam, P6: SystemParam,

pub fn p0<'a>(&'a mut self) -> <P0 as SystemParam>::Item<'a, 'a>

Gets exclusive access to the parameter at index 0 in this ParamSet. No other parameters may be accessed while this one is active.

pub fn p1<'a>(&'a mut self) -> <P1 as SystemParam>::Item<'a, 'a>

Gets exclusive access to the parameter at index 1 in this ParamSet. No other parameters may be accessed while this one is active.

pub fn p2<'a>(&'a mut self) -> <P2 as SystemParam>::Item<'a, 'a>

Gets exclusive access to the parameter at index 2 in this ParamSet. No other parameters may be accessed while this one is active.

pub fn p3<'a>(&'a mut self) -> <P3 as SystemParam>::Item<'a, 'a>

Gets exclusive access to the parameter at index 3 in this ParamSet. No other parameters may be accessed while this one is active.

pub fn p4<'a>(&'a mut self) -> <P4 as SystemParam>::Item<'a, 'a>

Gets exclusive access to the parameter at index 4 in this ParamSet. No other parameters may be accessed while this one is active.

pub fn p5<'a>(&'a mut self) -> <P5 as SystemParam>::Item<'a, 'a>

Gets exclusive access to the parameter at index 5 in this ParamSet. No other parameters may be accessed while this one is active.

pub fn p6<'a>(&'a mut self) -> <P6 as SystemParam>::Item<'a, 'a>

Gets exclusive access to the parameter at index 6 in this ParamSet. No other parameters may be accessed while this one is active.

impl<'w, 's, P0, P1, P2, P3, P4, P5, P6, P7> ParamSet<'w, 's, (P0, P1, P2, P3, P4, P5, P6, P7)>

where P0: SystemParam, P1: SystemParam, P2: SystemParam, P3: SystemParam, P4: SystemParam, P5: SystemParam, P6: SystemParam, P7: SystemParam,

pub fn p0<'a>(&'a mut self) -> <P0 as SystemParam>::Item<'a, 'a>

Gets exclusive access to the parameter at index 0 in this ParamSet. No other parameters may be accessed while this one is active.

pub fn p1<'a>(&'a mut self) -> <P1 as SystemParam>::Item<'a, 'a>

Gets exclusive access to the parameter at index 1 in this ParamSet. No other parameters may be accessed while this one is active.

pub fn p2<'a>(&'a mut self) -> <P2 as SystemParam>::Item<'a, 'a>

Gets exclusive access to the parameter at index 2 in this ParamSet. No other parameters may be accessed while this one is active.

pub fn p3<'a>(&'a mut self) -> <P3 as SystemParam>::Item<'a, 'a>

Gets exclusive access to the parameter at index 3 in this ParamSet. No other parameters may be accessed while this one is active.

pub fn p4<'a>(&'a mut self) -> <P4 as SystemParam>::Item<'a, 'a>

Gets exclusive access to the parameter at index 4 in this ParamSet. No other parameters may be accessed while this one is active.

pub fn p5<'a>(&'a mut self) -> <P5 as SystemParam>::Item<'a, 'a>

Gets exclusive access to the parameter at index 5 in this ParamSet. No other parameters may be accessed while this one is active.

pub fn p6<'a>(&'a mut self) -> <P6 as SystemParam>::Item<'a, 'a>

Gets exclusive access to the parameter at index 6 in this ParamSet. No other parameters may be accessed while this one is active.

pub fn p7<'a>(&'a mut self) -> <P7 as SystemParam>::Item<'a, 'a>

Gets exclusive access to the parameter at index 7 in this ParamSet. No other parameters may be accessed while this one is active.

impl<T> ParamSet<'_, '_, Vec<T>>

where T: SystemParam,

pub fn get_mut(&mut self, index: usize) -> <T as SystemParam>::Item<'_, '_>

Accesses the parameter at the given index. No other parameters may be accessed while this one is active.

pub fn for_each(&mut self, f: impl FnMut(<T as SystemParam>::Item<'_, '_>))

Calls a closure for each parameter in the set.

Trait Implementations

impl<'w, 's, P0> ReadOnlySystemParam for ParamSet<'w, 's, (P0,)>

where P0: ReadOnlySystemParam,

impl<'w, 's, P0, P1> ReadOnlySystemParam for ParamSet<'w, 's, (P0, P1)>

where P0: ReadOnlySystemParam, P1: ReadOnlySystemParam,

impl<'w, 's, P0, P1, P2> ReadOnlySystemParam for ParamSet<'w, 's, (P0, P1, P2)>

where P0: ReadOnlySystemParam, P1: ReadOnlySystemParam, P2: ReadOnlySystemParam,

impl<'w, 's, P0, P1, P2, P3> ReadOnlySystemParam for ParamSet<'w, 's, (P0, P1, P2, P3)>

where P0: ReadOnlySystemParam, P1: ReadOnlySystemParam, P2: ReadOnlySystemParam, P3: ReadOnlySystemParam,

impl<'w, 's, P0, P1, P2, P3, P4> ReadOnlySystemParam for ParamSet<'w, 's, (P0, P1, P2, P3, P4)>

where P0: ReadOnlySystemParam, P1: ReadOnlySystemParam, P2: ReadOnlySystemParam, P3: ReadOnlySystemParam, P4: ReadOnlySystemParam,

impl<'w, 's, P0, P1, P2, P3, P4, P5> ReadOnlySystemParam for ParamSet<'w, 's, (P0, P1, P2, P3, P4, P5)>

where P0: ReadOnlySystemParam, P1: ReadOnlySystemParam, P2: ReadOnlySystemParam, P3: ReadOnlySystemParam, P4: ReadOnlySystemParam, P5: ReadOnlySystemParam,

impl<'w, 's, P0, P1, P2, P3, P4, P5, P6> ReadOnlySystemParam for ParamSet<'w, 's, (P0, P1, P2, P3, P4, P5, P6)>

where P0: ReadOnlySystemParam, P1: ReadOnlySystemParam, P2: ReadOnlySystemParam, P3: ReadOnlySystemParam, P4: ReadOnlySystemParam, P5: ReadOnlySystemParam, P6: ReadOnlySystemParam,

impl<'w, 's, P0, P1, P2, P3, P4, P5, P6, P7> ReadOnlySystemParam for ParamSet<'w, 's, (P0, P1, P2, P3, P4, P5, P6, P7)>

where P0: ReadOnlySystemParam, P1: ReadOnlySystemParam, P2: ReadOnlySystemParam, P3: ReadOnlySystemParam, P4: ReadOnlySystemParam, P5: ReadOnlySystemParam, P6: ReadOnlySystemParam, P7: ReadOnlySystemParam,

impl<'_w, '_s, P0> SystemParam for ParamSet<'_w, '_s, (P0,)>

where P0: SystemParam,

type State = (<P0 as SystemParam>::State,)

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

type Item<'w, 's> = ParamSet<'w, 's, (P0,)>

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, ) -> <ParamSet<'_w, '_s, (P0,)> as SystemParam>::State

Creates a new instance of this param’s State.

fn init_access( state: &<ParamSet<'_w, '_s, (P0,)> as SystemParam>::State, system_meta: &mut SystemMeta, component_access_set: &mut FilteredAccessSet, world: &mut World, )

Registers any World access used by this SystemParam.

fn apply( state: &mut <ParamSet<'_w, '_s, (P0,)> as SystemParam>::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 <ParamSet<'_w, '_s, (P0,)> as SystemParam>::State, system_meta: &SystemMeta, world: DeferredWorld<'_>, )

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

unsafe fn get_param<'w, 's>( state: &'s mut <ParamSet<'_w, '_s, (P0,)> as SystemParam>::State, system_meta: &SystemMeta, world: UnsafeWorldCell<'w>, change_tick: Tick, ) -> Result<<ParamSet<'_w, '_s, (P0,)> as SystemParam>::Item<'w, 's>, SystemParamValidationError>

Creates a parameter to be passed into a SystemParamFunction.

impl<'_w, '_s, P0, P1> SystemParam for ParamSet<'_w, '_s, (P0, P1)>

where P0: SystemParam, P1: SystemParam,

type State = (<P0 as SystemParam>::State, <P1 as SystemParam>::State)

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

type Item<'w, 's> = ParamSet<'w, 's, (P0, P1)>

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, ) -> <ParamSet<'_w, '_s, (P0, P1)> as SystemParam>::State

Creates a new instance of this param’s State.

fn init_access( state: &<ParamSet<'_w, '_s, (P0, P1)> as SystemParam>::State, system_meta: &mut SystemMeta, component_access_set: &mut FilteredAccessSet, world: &mut World, )

Registers any World access used by this SystemParam.

fn apply( state: &mut <ParamSet<'_w, '_s, (P0, P1)> as SystemParam>::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 <ParamSet<'_w, '_s, (P0, P1)> as SystemParam>::State, system_meta: &SystemMeta, world: DeferredWorld<'_>, )

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

unsafe fn get_param<'w, 's>( state: &'s mut <ParamSet<'_w, '_s, (P0, P1)> as SystemParam>::State, system_meta: &SystemMeta, world: UnsafeWorldCell<'w>, change_tick: Tick, ) -> Result<<ParamSet<'_w, '_s, (P0, P1)> as SystemParam>::Item<'w, 's>, SystemParamValidationError>

Creates a parameter to be passed into a SystemParamFunction.

impl<'_w, '_s, P0, P1, P2> SystemParam for ParamSet<'_w, '_s, (P0, P1, P2)>

where P0: SystemParam, P1: SystemParam, P2: SystemParam,

type State = (<P0 as SystemParam>::State, <P1 as SystemParam>::State, <P2 as SystemParam>::State)

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

type Item<'w, 's> = ParamSet<'w, 's, (P0, P1, P2)>

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, ) -> <ParamSet<'_w, '_s, (P0, P1, P2)> as SystemParam>::State

Creates a new instance of this param’s State.

fn init_access( state: &<ParamSet<'_w, '_s, (P0, P1, P2)> as SystemParam>::State, system_meta: &mut SystemMeta, component_access_set: &mut FilteredAccessSet, world: &mut World, )

Registers any World access used by this SystemParam.

fn apply( state: &mut <ParamSet<'_w, '_s, (P0, P1, P2)> as SystemParam>::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 <ParamSet<'_w, '_s, (P0, P1, P2)> as SystemParam>::State, system_meta: &SystemMeta, world: DeferredWorld<'_>, )

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

unsafe fn get_param<'w, 's>( state: &'s mut <ParamSet<'_w, '_s, (P0, P1, P2)> as SystemParam>::State, system_meta: &SystemMeta, world: UnsafeWorldCell<'w>, change_tick: Tick, ) -> Result<<ParamSet<'_w, '_s, (P0, P1, P2)> as SystemParam>::Item<'w, 's>, SystemParamValidationError>

Creates a parameter to be passed into a SystemParamFunction.

impl<'_w, '_s, P0, P1, P2, P3> SystemParam for ParamSet<'_w, '_s, (P0, P1, P2, P3)>

where P0: SystemParam, P1: SystemParam, P2: SystemParam, P3: SystemParam,

type State = (<P0 as SystemParam>::State, <P1 as SystemParam>::State, <P2 as SystemParam>::State, <P3 as SystemParam>::State)

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

type Item<'w, 's> = ParamSet<'w, 's, (P0, P1, P2, P3)>

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, ) -> <ParamSet<'_w, '_s, (P0, P1, P2, P3)> as SystemParam>::State

Creates a new instance of this param’s State.

fn init_access( state: &<ParamSet<'_w, '_s, (P0, P1, P2, P3)> as SystemParam>::State, system_meta: &mut SystemMeta, component_access_set: &mut FilteredAccessSet, world: &mut World, )

Registers any World access used by this SystemParam.

fn apply( state: &mut <ParamSet<'_w, '_s, (P0, P1, P2, P3)> as SystemParam>::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 <ParamSet<'_w, '_s, (P0, P1, P2, P3)> as SystemParam>::State, system_meta: &SystemMeta, world: DeferredWorld<'_>, )

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

unsafe fn get_param<'w, 's>( state: &'s mut <ParamSet<'_w, '_s, (P0, P1, P2, P3)> as SystemParam>::State, system_meta: &SystemMeta, world: UnsafeWorldCell<'w>, change_tick: Tick, ) -> Result<<ParamSet<'_w, '_s, (P0, P1, P2, P3)> as SystemParam>::Item<'w, 's>, SystemParamValidationError>

Creates a parameter to be passed into a SystemParamFunction.

impl<'_w, '_s, P0, P1, P2, P3, P4> SystemParam for ParamSet<'_w, '_s, (P0, P1, P2, P3, P4)>

where P0: SystemParam, P1: SystemParam, P2: SystemParam, P3: SystemParam, P4: SystemParam,

type State = (<P0 as SystemParam>::State, <P1 as SystemParam>::State, <P2 as SystemParam>::State, <P3 as SystemParam>::State, <P4 as SystemParam>::State)

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

type Item<'w, 's> = ParamSet<'w, 's, (P0, P1, P2, P3, P4)>

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, ) -> <ParamSet<'_w, '_s, (P0, P1, P2, P3, P4)> as SystemParam>::State

Creates a new instance of this param’s State.

fn init_access( state: &<ParamSet<'_w, '_s, (P0, P1, P2, P3, P4)> as SystemParam>::State, system_meta: &mut SystemMeta, component_access_set: &mut FilteredAccessSet, world: &mut World, )

Registers any World access used by this SystemParam.

fn apply( state: &mut <ParamSet<'_w, '_s, (P0, P1, P2, P3, P4)> as SystemParam>::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 <ParamSet<'_w, '_s, (P0, P1, P2, P3, P4)> as SystemParam>::State, system_meta: &SystemMeta, world: DeferredWorld<'_>, )

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

unsafe fn get_param<'w, 's>( state: &'s mut <ParamSet<'_w, '_s, (P0, P1, P2, P3, P4)> as SystemParam>::State, system_meta: &SystemMeta, world: UnsafeWorldCell<'w>, change_tick: Tick, ) -> Result<<ParamSet<'_w, '_s, (P0, P1, P2, P3, P4)> as SystemParam>::Item<'w, 's>, SystemParamValidationError>

Creates a parameter to be passed into a SystemParamFunction.

impl<'_w, '_s, P0, P1, P2, P3, P4, P5> SystemParam for ParamSet<'_w, '_s, (P0, P1, P2, P3, P4, P5)>

where P0: SystemParam, P1: SystemParam, P2: SystemParam, P3: SystemParam, P4: SystemParam, P5: SystemParam,

type State = (<P0 as SystemParam>::State, <P1 as SystemParam>::State, <P2 as SystemParam>::State, <P3 as SystemParam>::State, <P4 as SystemParam>::State, <P5 as SystemParam>::State)

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

type Item<'w, 's> = ParamSet<'w, 's, (P0, P1, P2, P3, P4, P5)>

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, ) -> <ParamSet<'_w, '_s, (P0, P1, P2, P3, P4, P5)> as SystemParam>::State

Creates a new instance of this param’s State.

fn init_access( state: &<ParamSet<'_w, '_s, (P0, P1, P2, P3, P4, P5)> as SystemParam>::State, system_meta: &mut SystemMeta, component_access_set: &mut FilteredAccessSet, world: &mut World, )

Registers any World access used by this SystemParam.

fn apply( state: &mut <ParamSet<'_w, '_s, (P0, P1, P2, P3, P4, P5)> as SystemParam>::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 <ParamSet<'_w, '_s, (P0, P1, P2, P3, P4, P5)> as SystemParam>::State, system_meta: &SystemMeta, world: DeferredWorld<'_>, )

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

unsafe fn get_param<'w, 's>( state: &'s mut <ParamSet<'_w, '_s, (P0, P1, P2, P3, P4, P5)> as SystemParam>::State, system_meta: &SystemMeta, world: UnsafeWorldCell<'w>, change_tick: Tick, ) -> Result<<ParamSet<'_w, '_s, (P0, P1, P2, P3, P4, P5)> as SystemParam>::Item<'w, 's>, SystemParamValidationError>

Creates a parameter to be passed into a SystemParamFunction.

impl<'_w, '_s, P0, P1, P2, P3, P4, P5, P6> SystemParam for ParamSet<'_w, '_s, (P0, P1, P2, P3, P4, P5, P6)>

where P0: SystemParam, P1: SystemParam, P2: SystemParam, P3: SystemParam, P4: SystemParam, P5: SystemParam, P6: SystemParam,

type State = (<P0 as SystemParam>::State, <P1 as SystemParam>::State, <P2 as SystemParam>::State, <P3 as SystemParam>::State, <P4 as SystemParam>::State, <P5 as SystemParam>::State, <P6 as SystemParam>::State)

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

type Item<'w, 's> = ParamSet<'w, 's, (P0, P1, P2, P3, P4, P5, P6)>

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, ) -> <ParamSet<'_w, '_s, (P0, P1, P2, P3, P4, P5, P6)> as SystemParam>::State

Creates a new instance of this param’s State.

fn init_access( state: &<ParamSet<'_w, '_s, (P0, P1, P2, P3, P4, P5, P6)> as SystemParam>::State, system_meta: &mut SystemMeta, component_access_set: &mut FilteredAccessSet, world: &mut World, )

Registers any World access used by this SystemParam.

fn apply( state: &mut <ParamSet<'_w, '_s, (P0, P1, P2, P3, P4, P5, P6)> as SystemParam>::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 <ParamSet<'_w, '_s, (P0, P1, P2, P3, P4, P5, P6)> as SystemParam>::State, system_meta: &SystemMeta, world: DeferredWorld<'_>, )

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

unsafe fn get_param<'w, 's>( state: &'s mut <ParamSet<'_w, '_s, (P0, P1, P2, P3, P4, P5, P6)> as SystemParam>::State, system_meta: &SystemMeta, world: UnsafeWorldCell<'w>, change_tick: Tick, ) -> Result<<ParamSet<'_w, '_s, (P0, P1, P2, P3, P4, P5, P6)> as SystemParam>::Item<'w, 's>, SystemParamValidationError>

Creates a parameter to be passed into a SystemParamFunction.

impl<'_w, '_s, P0, P1, P2, P3, P4, P5, P6, P7> SystemParam for ParamSet<'_w, '_s, (P0, P1, P2, P3, P4, P5, P6, P7)>

where P0: SystemParam, P1: SystemParam, P2: SystemParam, P3: SystemParam, P4: SystemParam, P5: SystemParam, P6: SystemParam, P7: SystemParam,

type State = (<P0 as SystemParam>::State, <P1 as SystemParam>::State, <P2 as SystemParam>::State, <P3 as SystemParam>::State, <P4 as SystemParam>::State, <P5 as SystemParam>::State, <P6 as SystemParam>::State, <P7 as SystemParam>::State)

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

type Item<'w, 's> = ParamSet<'w, 's, (P0, P1, P2, P3, P4, P5, P6, P7)>

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, ) -> <ParamSet<'_w, '_s, (P0, P1, P2, P3, P4, P5, P6, P7)> as SystemParam>::State

Creates a new instance of this param’s State.

fn init_access( state: &<ParamSet<'_w, '_s, (P0, P1, P2, P3, P4, P5, P6, P7)> as SystemParam>::State, system_meta: &mut SystemMeta, component_access_set: &mut FilteredAccessSet, world: &mut World, )

Registers any World access used by this SystemParam.

fn apply( state: &mut <ParamSet<'_w, '_s, (P0, P1, P2, P3, P4, P5, P6, P7)> as SystemParam>::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 <ParamSet<'_w, '_s, (P0, P1, P2, P3, P4, P5, P6, P7)> as SystemParam>::State, system_meta: &SystemMeta, world: DeferredWorld<'_>, )

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

unsafe fn get_param<'w, 's>( state: &'s mut <ParamSet<'_w, '_s, (P0, P1, P2, P3, P4, P5, P6, P7)> as SystemParam>::State, system_meta: &SystemMeta, world: UnsafeWorldCell<'w>, change_tick: Tick, ) -> Result<<ParamSet<'_w, '_s, (P0, P1, P2, P3, P4, P5, P6, P7)> as SystemParam>::Item<'w, 's>, SystemParamValidationError>

Creates a parameter to be passed into a SystemParamFunction.

impl<T> SystemParam for ParamSet<'_, '_, Vec<T>>

where T: SystemParam,

type State = Vec<<T as SystemParam>::State>

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

type Item<'world, 'state> = ParamSet<'world, 'state, Vec<T>>

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, ) -> <ParamSet<'_, '_, Vec<T>> as SystemParam>::State

Creates a new instance of this param’s State.

fn init_access( state: &<ParamSet<'_, '_, Vec<T>> as SystemParam>::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<'world, 'state>( state: &'state mut <ParamSet<'_, '_, Vec<T>> as SystemParam>::State, system_meta: &SystemMeta, world: UnsafeWorldCell<'world>, change_tick: Tick, ) -> Result<<ParamSet<'_, '_, Vec<T>> as SystemParam>::Item<'world, 'state>, SystemParamValidationError>

Creates a parameter to be passed into a SystemParamFunction.

fn apply( state: &mut <ParamSet<'_, '_, Vec<T>> as SystemParam>::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 <ParamSet<'_, '_, Vec<T>> as SystemParam>::State, system_meta: &SystemMeta, world: DeferredWorld<'_>, )

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

impl<'w, 's, P0, P1, B0, B1> SystemParamBuilder<ParamSet<'w, 's, (P0, P1)>> for ParamSetBuilder<(B0, B1)>

where P0: SystemParam, P1: SystemParam, B0: SystemParamBuilder<P0>, B1: SystemParamBuilder<P1>,

fn build(self, world: &mut World) -> <(P0, P1) as SystemParam>::State

Registers any World access used by this SystemParam and creates a new instance of this param’s State.

fn build_state(self, world: &mut World) -> SystemState<P>

Create a SystemState from a SystemParamBuilder. To create a system, call SystemState::build_system on the result.

fn build_system<Marker, In, Out, Func>( self, func: Func, ) -> IntoBuilderSystem<Marker, In, Out, Func, Self>

where Self: 'static, Func: SystemParamFunction<Marker, Param = P>,

Create a System from a SystemParamBuilder directly.

impl<'w, 's, P0, P1, P2, B0, B1, B2> SystemParamBuilder<ParamSet<'w, 's, (P0, P1, P2)>> for ParamSetBuilder<(B0, B1, B2)>

where P0: SystemParam, P1: SystemParam, P2: SystemParam, B0: SystemParamBuilder<P0>, B1: SystemParamBuilder<P1>, B2: SystemParamBuilder<P2>,

fn build(self, world: &mut World) -> <(P0, P1, P2) as SystemParam>::State

Registers any World access used by this SystemParam and creates a new instance of this param’s State.

fn build_state(self, world: &mut World) -> SystemState<P>

Create a SystemState from a SystemParamBuilder. To create a system, call SystemState::build_system on the result.

fn build_system<Marker, In, Out, Func>( self, func: Func, ) -> IntoBuilderSystem<Marker, In, Out, Func, Self>

where Self: 'static, Func: SystemParamFunction<Marker, Param = P>,

Create a System from a SystemParamBuilder directly.

impl<'w, 's, P0, P1, P2, P3, B0, B1, B2, B3> SystemParamBuilder<ParamSet<'w, 's, (P0, P1, P2, P3)>> for ParamSetBuilder<(B0, B1, B2, B3)>

where P0: SystemParam, P1: SystemParam, P2: SystemParam, P3: SystemParam, B0: SystemParamBuilder<P0>, B1: SystemParamBuilder<P1>, B2: SystemParamBuilder<P2>, B3: SystemParamBuilder<P3>,

fn build(self, world: &mut World) -> <(P0, P1, P2, P3) as SystemParam>::State

Registers any World access used by this SystemParam and creates a new instance of this param’s State.

fn build_state(self, world: &mut World) -> SystemState<P>

Create a SystemState from a SystemParamBuilder. To create a system, call SystemState::build_system on the result.

fn build_system<Marker, In, Out, Func>( self, func: Func, ) -> IntoBuilderSystem<Marker, In, Out, Func, Self>

where Self: 'static, Func: SystemParamFunction<Marker, Param = P>,

Create a System from a SystemParamBuilder directly.

impl<'w, 's, P0, P1, P2, P3, P4, B0, B1, B2, B3, B4> SystemParamBuilder<ParamSet<'w, 's, (P0, P1, P2, P3, P4)>> for ParamSetBuilder<(B0, B1, B2, B3, B4)>

where P0: SystemParam, P1: SystemParam, P2: SystemParam, P3: SystemParam, P4: SystemParam, B0: SystemParamBuilder<P0>, B1: SystemParamBuilder<P1>, B2: SystemParamBuilder<P2>, B3: SystemParamBuilder<P3>, B4: SystemParamBuilder<P4>,

fn build( self, world: &mut World, ) -> <(P0, P1, P2, P3, P4) as SystemParam>::State

Registers any World access used by this SystemParam and creates a new instance of this param’s State.

fn build_state(self, world: &mut World) -> SystemState<P>

Create a SystemState from a SystemParamBuilder. To create a system, call SystemState::build_system on the result.

fn build_system<Marker, In, Out, Func>( self, func: Func, ) -> IntoBuilderSystem<Marker, In, Out, Func, Self>

where Self: 'static, Func: SystemParamFunction<Marker, Param = P>,

Create a System from a SystemParamBuilder directly.

impl<'w, 's, P0, P1, P2, P3, P4, P5, B0, B1, B2, B3, B4, B5> SystemParamBuilder<ParamSet<'w, 's, (P0, P1, P2, P3, P4, P5)>> for ParamSetBuilder<(B0, B1, B2, B3, B4, B5)>

where P0: SystemParam, P1: SystemParam, P2: SystemParam, P3: SystemParam, P4: SystemParam, P5: SystemParam, B0: SystemParamBuilder<P0>, B1: SystemParamBuilder<P1>, B2: SystemParamBuilder<P2>, B3: SystemParamBuilder<P3>, B4: SystemParamBuilder<P4>, B5: SystemParamBuilder<P5>,

fn build( self, world: &mut World, ) -> <(P0, P1, P2, P3, P4, P5) as SystemParam>::State

Registers any World access used by this SystemParam and creates a new instance of this param’s State.

fn build_state(self, world: &mut World) -> SystemState<P>

Create a SystemState from a SystemParamBuilder. To create a system, call SystemState::build_system on the result.

fn build_system<Marker, In, Out, Func>( self, func: Func, ) -> IntoBuilderSystem<Marker, In, Out, Func, Self>

where Self: 'static, Func: SystemParamFunction<Marker, Param = P>,

Create a System from a SystemParamBuilder directly.

impl<'w, 's, P0, P1, P2, P3, P4, P5, P6, B0, B1, B2, B3, B4, B5, B6> SystemParamBuilder<ParamSet<'w, 's, (P0, P1, P2, P3, P4, P5, P6)>> for ParamSetBuilder<(B0, B1, B2, B3, B4, B5, B6)>

where P0: SystemParam, P1: SystemParam, P2: SystemParam, P3: SystemParam, P4: SystemParam, P5: SystemParam, P6: SystemParam, B0: SystemParamBuilder<P0>, B1: SystemParamBuilder<P1>, B2: SystemParamBuilder<P2>, B3: SystemParamBuilder<P3>, B4: SystemParamBuilder<P4>, B5: SystemParamBuilder<P5>, B6: SystemParamBuilder<P6>,

fn build( self, world: &mut World, ) -> <(P0, P1, P2, P3, P4, P5, P6) as SystemParam>::State

Registers any World access used by this SystemParam and creates a new instance of this param’s State.

fn build_state(self, world: &mut World) -> SystemState<P>

Create a SystemState from a SystemParamBuilder. To create a system, call SystemState::build_system on the result.

fn build_system<Marker, In, Out, Func>( self, func: Func, ) -> IntoBuilderSystem<Marker, In, Out, Func, Self>

where Self: 'static, Func: SystemParamFunction<Marker, Param = P>,

Create a System from a SystemParamBuilder directly.

impl<'w, 's, P0, P1, P2, P3, P4, P5, P6, P7, B0, B1, B2, B3, B4, B5, B6, B7> SystemParamBuilder<ParamSet<'w, 's, (P0, P1, P2, P3, P4, P5, P6, P7)>> for ParamSetBuilder<(B0, B1, B2, B3, B4, B5, B6, B7)>

where P0: SystemParam, P1: SystemParam, P2: SystemParam, P3: SystemParam, P4: SystemParam, P5: SystemParam, P6: SystemParam, P7: SystemParam, B0: SystemParamBuilder<P0>, B1: SystemParamBuilder<P1>, B2: SystemParamBuilder<P2>, B3: SystemParamBuilder<P3>, B4: SystemParamBuilder<P4>, B5: SystemParamBuilder<P5>, B6: SystemParamBuilder<P6>, B7: SystemParamBuilder<P7>,

fn build( self, world: &mut World, ) -> <(P0, P1, P2, P3, P4, P5, P6, P7) as SystemParam>::State

Registers any World access used by this SystemParam and creates a new instance of this param’s State.

fn build_state(self, world: &mut World) -> SystemState<P>

Create a SystemState from a SystemParamBuilder. To create a system, call SystemState::build_system on the result.

fn build_system<Marker, In, Out, Func>( self, func: Func, ) -> IntoBuilderSystem<Marker, In, Out, Func, Self>

where Self: 'static, Func: SystemParamFunction<Marker, Param = P>,

Create a System from a SystemParamBuilder directly.

impl<'w, 's, P0, B0> SystemParamBuilder<ParamSet<'w, 's, (P0,)>> for ParamSetBuilder<(B0,)>

where P0: SystemParam, B0: SystemParamBuilder<P0>,

fn build(self, world: &mut World) -> <(P0,) as SystemParam>::State

Registers any World access used by this SystemParam and creates a new instance of this param’s State.

fn build_state(self, world: &mut World) -> SystemState<P>

Create a SystemState from a SystemParamBuilder. To create a system, call SystemState::build_system on the result.

fn build_system<Marker, In, Out, Func>( self, func: Func, ) -> IntoBuilderSystem<Marker, In, Out, Func, Self>

where Self: 'static, Func: SystemParamFunction<Marker, Param = P>,

Create a System from a SystemParamBuilder directly.

impl<'w, 's, P, B> SystemParamBuilder<ParamSet<'w, 's, Vec<P>>> for ParamSetBuilder<Vec<B>>

where P: SystemParam, B: SystemParamBuilder<P>,

fn build(self, world: &mut World) -> <Vec<P> as SystemParam>::State

Registers any World access used by this SystemParam and creates a new instance of this param’s State.

fn build_state(self, world: &mut World) -> SystemState<P>

Create a SystemState from a SystemParamBuilder. To create a system, call SystemState::build_system on the result.

fn build_system<Marker, In, Out, Func>( self, func: Func, ) -> IntoBuilderSystem<Marker, In, Out, Func, Self>

where Self: 'static, Func: SystemParamFunction<Marker, Param = P>,

Create a System from a SystemParamBuilder directly.