def _generateSpecial_Volume3DOpts_clipPlane(overlayList, displayCtx, source,
    longArg):
    """Generates arguemnts for the ``Volume3DOpts.clipPlane`` option. """
    args = []
    for i in range(source.numClipPlanes):
        args += [longArg, '{:0.3f}'.format(source.clipPosition[i]),
            '{:0.3f}'.format(source.clipAzimuth[i]), '{:0.3f}'.format(
            source.clipInclination[i])]
    return args
