Function move_n_meters_along_active 

fn move_n_meters_along_active(
    n_meters: f32,
    curr_idx: f32,
    curr_segment_entity: Entity,
    curr_dir: Dir,
    q_segments: &Query<'_, '_, (Entity, &TrackSegment, &Transform)>,
    q_nodes: &Query<'_, '_, (Entity, &TrackNode)>,
) -> Option<(Entity, f32, Dir)>

Function which tries to move n meters in global space along active connections.