def pltnp(point, v1, v2, v3):
    """
    Find the nearest point on a triangular plate to a given point. 
    
    https://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/cspice/pltnp_c.html
    
    :param point: A point in 3-dimensional space. 
    :type point: 3-Element Array of floats
    :param v1: Vertices of a triangular plate.
    :type v1: 3-Element Array of floats
    :param v2: Vertices of a triangular plate. 
    :type v2: 3-Element Array of floats
    :param v3: Vertices of a triangular plate. 
    :type v3: 3-Element Array of floats
    :return: the nearest point on a triangular plate to a given point and distance
    :rtype: tuple
    """
    point = stypes.toDoubleVector(point)
    v1 = stypes.toDoubleVector(v1)
    v2 = stypes.toDoubleVector(v2)
    v3 = stypes.toDoubleVector(v3)
    pnear = stypes.emptyDoubleVector(3)
    dist = ctypes.c_double()
    libspice.pltnp_c(point, v1, v2, v3, pnear, ctypes.byref(dist))
    return stypes.cVectorToPython(pnear), dist.value
Find the nearest point on a triangular plate to a given point. 
    
    https://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/cspice/pltnp_c.html
    
    :param point: A point in 3-dimensional space. 
    :type point: 3-Element Array of floats
    :param v1: Vertices of a triangular plate.
    :type v1: 3-Element Array of floats
    :param v2: Vertices of a triangular plate. 
    :type v2: 3-Element Array of floats
    :param v3: Vertices of a triangular plate. 
    :type v3: 3-Element Array of floats
    :return: the nearest point on a triangular plate to a given point and distance
    :rtype: tuple