friction: 0.,

        friction: 0.1,

    let shape_ball = shapes::Circle {
        radius: 0.3 * rapier_config.scale,

    let shape_ball = shapes::Ellipse {
        radii: Vec2::new(0.35 * rapier_config.scale, 0.25 * rapier_config.scale),

    commands
        .spawn()
        .insert_bundle(GeometryBuilder::build_as(
            &shape_ball,
            ShapeColors::new(Color::RED),
            DrawMode::Fill(FillOptions::default()),
            Transform::default(),
        ))
        .insert_bundle(RigidBodyBundle {
            position: Vec2::new(0.5, 0.5).into(),
            ccd,
            ..Default::default()
        })
        .insert_bundle(ColliderBundle {
            shape: ColliderShape::ball(0.3),
            material: collider_material.clone(),
            ..Default::default()
        })
        .insert(RigidBodyPositionSync::Discrete);
}