def _orth(self, t):
    '\n        Return the orthogonal orientation\n        '
    if (t < (0.5 * np.pi)):
        return (t + (0.5 * np.pi))
    return (t - (0.5 * np.pi))
Return the orthogonal orientation
def _orth(self, t):
    '\n        \n        '
    if (t < (0.5 * np.pi)):
        return (t + (0.5 * np.pi))
    return (t - (0.5 * np.pi))