    quad = vtkQuad()
    quad.GetPoints().SetPoint(0, 0, 0, 0)
    quad.GetPoints().SetPoint(1, 1, 0, 0)
    quad.GetPoints().SetPoint(2, 1, 1, 0)
    quad.GetPoints().SetPoint(3, 0, 1, 0)

--
    quad = vtkQuad()
    quad.GetPointIds().SetId(0, 0)
    quad.GetPointIds().SetId(1, 1)
    quad.GetPointIds().SetId(2, 2)
    quad.GetPointIds().SetId(3, 3)

