utils.py 文件源码

def sph2cart(r, az, elev):
    """ Convert spherical to cartesian coordinates.

    Attributes
    ----------
    r : float
        radius
    az : float
        aziumth (angle about z axis)
    elev : float
        elevation from xy plane

    Returns
    -------
    float
        x-coordinate
    float
        y-coordinate
    float
        z-coordinate
    """
    x = r * np.cos(az) * np.sin(elev)
    y = r * np.sin(az) * np.sin(elev)
    z = r * np.cos(elev)
    return x, y, z