plot.py 文件源码

def genSphCoords():
    """ Generates cartesian (x,y,z) and spherical (theta, phi) coordinates of a sphere
    Returns
    -------
    coords : named tuple
        holds cartesian (x,y,z) and spherical (theta, phi) coordinates
    """
    coords = namedtuple('coords', ['x', 'y', 'z', 'az', 'el'])
    az = _np.linspace(0, 2 * _np.pi, 360)
    el = _np.linspace(0, _np.pi, 181)
    coords.x = _np.outer(_np.cos(az), _np.sin(el))
    coords.y = _np.outer(_np.sin(az), _np.sin(el))
    coords.z = _np.outer(_np.ones(360), _np.cos(el))

    coords.el, coords.az = _np.meshgrid(_np.linspace(0, _np.pi, 181),
                                        _np.linspace(0, 2 * _np.pi, 360))
    return coords