    glyph_filter = vtkVertexGlyphFilter()
    glyph_filter.SetInputData(polydata)

    point_mapper = vtkPolyDataMapper()
    point_mapper.SetInputConnection(glyph_filter.GetOutputPort())

--
    glyphFilter = vtkVertexGlyphFilter()
    glyphFilter.SetInputData(polydata)
    glyphFilter.Update()

    # Create a mapper and actor
    pointsMapper = vtkPolyDataMapper()
--
    vertexGlyphFilter = vtkVertexGlyphFilter()
    vertexGlyphFilter.AddInputData(polydata)
    vertexGlyphFilter.Update()

    # Create a mapper and actor
    mapper = vtkPolyDataMapper()
--
    glyphFilter = vtkVertexGlyphFilter()
    glyphFilter.SetInputData(polydata)
    glyphFilter.Update()

    mapper = vtkPolyDataMapper2D()
    mapper.SetInputConnection(glyphFilter.GetOutputPort())
--
    vertexGlyphFilter = vtkVertexGlyphFilter()
    vertexGlyphFilter.SetInputData(polyData)
    vertexGlyphFilter.Update()

    signedDistanceMapper = vtkPolyDataMapper()
    signedDistanceMapper.SetInputConnection(vertexGlyphFilter.GetOutputPort())
