code: def vprjpi(vin, projpl, invpl):
      
      vin = stypes.toDoubleVector(vin)
      vout = stypes.emptyDoubleVector(3)
      found = ctypes.c_int()
      libspice.vprjpi_c(vin, ctypes.byref(projpl), ctypes.byref(invpl), vout,
                        ctypes.byref(found))
      return stypes.cVectorToPython(vout), bool(found.value)
docs: Find the vector in a specified plane that maps to a specified
      vector in another plane under orthogonal projection.
  
      http://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/cspice/vprjpi_c.html
  
      :param vin: The projected vector. 
      :type vin: 3-Element Array of floats
      :param projpl: Plane containing vin. 
      :type projpl: spiceypy.utils.support_types.Plane
      :param invpl: Plane containing inverse image of vin. 
      :type invpl: spiceypy.utils.support_types.Plane
      :return: Inverse projection of vin.
      :rtype: list