stereonet_math.py 文件源码

def azimuth2rake(strike, dip, azimuth):
    """
    Projects an azimuth of a linear feature onto a plane as a rake angle.

    Parameters
    ----------
    strike, dip : numbers
        The strike and dip of the plane in degrees following the
        right-hand-rule.
    azimuth : numbers
        The azimuth of the linear feature in degrees clockwise from north (i.e.
        a 0-360 azimuth).

    Returns
    -------
    rake : number
        A rake angle in degrees measured downwards from horizontal.  Negative
        values correspond to the opposite end of the strike.
    """
    plunge, bearing = plane_intersection(strike, dip, azimuth, 90)
    rake = project_onto_plane(strike, dip, plunge, bearing)
    return rake