bevy get cursor position

Code Eater answered on January 18, 2024 Popularity 3/10 Helpfulness 1/10

answer bevy get cursor position

bevy get cursor position

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use bevy::window::PrimaryWindow;

/// We will store the world position of the mouse cursor here.
#[derive(Resource, Default)]
struct MyWorldCoords(Vec2);

/// Used to help identify our main camera
#[derive(Component)]
struct MainCamera;

fn setup(mut commands: Commands) {
    // Make sure to add the marker component when you set up your camera
    commands.spawn((Camera2dBundle::default(), MainCamera));
}

fn my_cursor_system(
    mut mycoords: ResMut<MyWorldCoords>,
    // query to get the window (so we can read the current cursor position)
    q_window: Query<&Window, With<PrimaryWindow>>,
    // query to get camera transform
    q_camera: Query<(&Camera, &GlobalTransform), With<MainCamera>>,
) {
    // get the camera info and transform
    // assuming there is exactly one main camera entity, so Query::single() is OK
    let (camera, camera_transform) = q_camera.single();

    // There is only one primary window, so we can similarly get it from the query:
    let window = q_window.single();

    // check if the cursor is inside the window and get its position
    // then, ask bevy to convert into world coordinates, and truncate to discard Z
    if let Some(world_position) = window.cursor_position()
        .and_then(|cursor| camera.viewport_to_world(camera_transform, cursor))
        .map(|ray| ray.origin.truncate())
    {
        mycoords.0 = world_position;
        eprintln!("World coords: {}/{}", world_position.x, world_position.y);
    }
}

Popularity 3/10 Helpfulness 1/10 Language whatever

Source: bevy-cheatbook.github.io

Tags: bevy cursor-position get whatever

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Contributed on Jan 18 2024

Code Eater

0 Answers Avg Quality 2/10

bevy get cursor position

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