Why i can not Query a Light ?(How make light follow cammera?)

[zzhgithub]

bevy 0.10.1

fn light_follow_camera_system(
    cam_q: Query<&Transform, With<FlyCam>>,
    mut light_q: Query<&mut Transform, With<PointLight>>,
) {
    
    let camera_position = if let Some(tfm) = cam_q.iter().next() {
        tfm.translation
    } else {
        return;
    };
    if let Some(mut tfm) = light_q.iter_mut().next() {
        tfm.translation = camera_position;
    }
}

and find that :

thread 'main' panicked at 'error[B0001]: Query<&mut bevy_transform::components::transform::Transform, bevy_ecs::query::filter::With<bevy_pbr::light::PointLight>> in system project_H::light_follow_camera_system accesses component(s) bevy_transform::components::transform::Transform in a way that conflicts with a previous system parameter. Consider using `Without<T>` to create disjoint Queries or merging conflicting Queries into a `ParamSet`.', /Users/zhouzihao/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bevy_ecs-0.10.1/src/system/system_param.rs:265:5

[nicopap]

You need to add a Without filter to the cam_q query. This allows bevy to tell cam_q and light_q do not overlap, and therefore can run safely without violating rust's borrowing rules:

    cam_q: Query<&Transform, (With<FlyCam>, Without<PointLight>)>,

[zzhgithub]

Fixed! Thanks!