Function libre_pvz_animation::transform::transform_propagate_system

pub fn transform_propagate_system(
    root_query: Query<'_, '_, (Option<&Children>, Ref<'_, Transform2D>, &mut GlobalTransform), Without<Parent>>,
    transform_query: Query<'_, '_, (&mut GlobalTransform, Ref<'_, Transform2D>), With<Parent>>,
    children_query: Query<'_, '_, Option<&Children>, (With<Parent>, With<GlobalTransform>)>
)

Update GlobalTransform component of entities based on entity hierarchy and Transform2D component.