vector steerlib_arrive(entity this, vector point, float maximal_distance);
vector steerlib_attract2(entity this, vector point, float min_influense, float max_distance, float max_influense);
vector steerlib_arrive(entity this, vector point, float maximal_distance);
vector steerlib_attract2(entity this, vector point, float min_influense, float max_distance, float max_influense);