def tmAvgMidpoint(ref_point_1, ref_point_2):
    """
    Simplest version of a midpoint calculation. Simply the average of two positions

    Args:
        ref_point_1 (tm): position 1
        ref_point_2 (tm): position 2
    Returns:
        tm: midpoint average of positions 1 and 2
    """
    return (ref_point_1 + ref_point_2)/2