Function calculate_bounds 

pub fn calculate_bounds(
    commands: Commands<'_, '_>,
    meshes: Res<'_, Assets<Mesh>>,
    new_aabb: Query<'_, '_, (Entity, &Mesh3d), (Without<Aabb>, Without<NoFrustumCulling>, Without<NoAutoAabb>)>,
    update_aabb: Query<'_, '_, (&Mesh3d, &mut Aabb), (Or<(AssetChanged<Mesh3d>, Changed<Mesh3d>)>, Without<NoFrustumCulling>, Without<NoAutoAabb>)>,
)

Computes and adds an Aabb component to entities with a Mesh3d component and without a NoFrustumCulling component.

This system is used in system set VisibilitySystems::CalculateBounds.