ReadMassProperties always return a mass of 0

[miyoku157]

I've run a simple code spawning entities in batch like this :

fn setup_benchmark_scene
    (mut commands: Commands,
    mut meshes: ResMut<Assets<Mesh>>,
    mut materials: ResMut<Assets<StandardMaterial>>,
) {
    let mut vaisseau= Vec::new();
    let mut rng = thread_rng();
    for _ in 0..2000{
        vaisseau.push(
            (
                meshes.add(Mesh::from(shape::Icosphere {
                    radius: 1.0,
                    subdivisions: 2,
                })),
                materials.add(Color::rgb(rng.gen(), rng.gen(), rng.gen()).into()),
                Transform::from_xyz(rng.gen_range(-100.0..100.0), rng.gen_range(-100.0..100.0), rng.gen_range(-100.0..100.0)),
                GlobalTransform::default(),
                Visibility::default(),
                ComputedVisibility::default(),
                 RigidBody::Dynamic,
                 ActiveCollisionTypes::default(),
                 Collider::ball(1.0),
                 AdditionalMassProperties::Mass(rng.gen_range(50.0..200.0)),
                 ExternalForce{
                    force: Vec3::new(0.0, 0.0, 0.0),
                    torque: Vec3::new(0.0, 0.0, 0.0),
                 },
             )
        );
    }
    commands.spawn_batch(vaisseau);
}

And running this system (which is very close to the example here: https://bevyengine.org/examples/ecs/iter-combinations/)

fn interact_bodies(mut query: Query<(&ReadMassProperties, &GlobalTransform, &mut ExternalForce)>,
                    cont: Res<RapierContext>) {
    let mut iter = query.iter_combinations_mut();
    while let Some([(m1, transform1, mut acc1), (m2, transform2, mut acc2)]) =
        iter.fetch_next()
    {
        let delta = transform2.translation() - transform1.translation();
        let distance_sq: f32 = delta.length_squared();
        

        let f = GRAVITY_CONSTANT / distance_sq;
        
        let force_unit_mass = delta * f;
        acc1.force += force_unit_mass * m1.0.mass;
        acc2.force -= force_unit_mass * m2.0.mass;
        
    }
}

But when i do the mass of m1 and m2 are always equals to 0. To retrieve the mass, i currently use a workaround using rapierContext resources and RigidbodyHandle:
cont.bodies[m1.0].mass()

[rdelfin]

I'm experiencing the same issue. @miyoku157 were you able to resolve?

[miyoku157]

Currently i'm on the last version of the library, but i didn't find any solution except the workaround.

[Aceeri]

I believe this should be fixed in the next release, previously it wasn't being updated when the changed.

[Vrixyz]

I believe that's fixed, please open a new issue (and link there) if need be.