#!/usr/bin/env python
from vtkmodules.vtkIOLegacy import vtkSimplePointsReader
from vtkmodules.vtkRenderingCore import (
    vtkActor,
    vtkPolyDataMapper,
    vtkRenderWindow,
    vtkRenderWindowInteractor,
    vtkRenderer,
)
import vtkmodules.vtkInteractionStyle
import vtkmodules.vtkRenderingFreeType
import vtkmodules.vtkRenderingOpenGL2
from vtkmodules.util.misc import vtkGetDataRoot
VTK_DATA_ROOT = vtkGetDataRoot()

reader = vtkSimplePointsReader()
reader.SetFileName(VTK_DATA_ROOT + "/Data/points.txt")

mapper = vtkPolyDataMapper()
mapper.SetInputConnection(reader.GetOutputPort())

actor = vtkActor()
actor.SetMapper(mapper)
actor.GetProperty().SetPointSize(5)

ren1 = vtkRenderer()
renWin = vtkRenderWindow()
renWin.AddRenderer(ren1)
iren = vtkRenderWindowInteractor()
iren.SetRenderWindow(renWin)

ren1.AddActor(actor)

renWin.SetSize(300, 300)

iren.Initialize()

renWin.Render()

#iren.Start()