def calc_geom_centroid(point1, point2, point3):
    """
    Compute centroid between three points

    Parameters
    ----------
    point1: array_like of number
        First point
    point2: array_like of number
        Second point
    point3: array_like of number
        Second point

    Returns
    -------
    centroid: np.array[x, y, z]
    """
    centroid = (point1 + point2 + point3)/3
    return centroid