Function bevy_picking_xpbd::update_hits

pub fn update_hits(
    picking_cameras: Query<'_, '_, (&Camera, Option<&XpbdPickable>, Option<&RenderLayers>)>,
    ray_map: Res<'_, RayMap>,
    pickables: Query<'_, '_, &Pickable>,
    marked_targets: Query<'_, '_, &XpbdPickable>,
    layers: Query<'_, '_, &RenderLayers>,
    backend_settings: Res<'_, XpbdBackendSettings>,
    spatial_query: Option<Res<'_, SpatialQueryPipeline>>,
    output_events: EventWriter<'_, PointerHits>
)

Raycasts into the scene using XpbdBackendSettings and PointerLocations, then outputs PointerHits.