#!/usr/bin/env python
############################################################
from vtk import *
############################################################

# Create sources
line1 = vtkLineSource()
line1.SetPoint1(1, 0, 0)
line1.SetPoint2(-1, 0, 0)
line1.SetResolution(32)

points = vtkPoints()
points.InsertNextPoint(1, 0, 0)
points.InsertNextPoint(-0.5, 1, 0)
points.InsertNextPoint(0, 1, 2)
points.InsertNextPoint(2, 1, -1)
points.InsertNextPoint(-1, 0, 0)
line2 = vtkLineSource()
line2.SetPoints(points)
line2.SetResolution(16)

# Create mappers
mapper1 = vtkPolyDataMapper()
mapper1.SetInputConnection(line1.GetOutputPort())

mapper2 = vtkPolyDataMapper()
mapper2.SetInputConnection(line2.GetOutputPort())

# Create actors
actor1 = vtkActor()
actor1.SetMapper(mapper1)
actor1.GetProperty().SetColor(1., 0., 0.)
actor2 = vtkActor()
actor2.SetMapper(mapper2)
actor2.GetProperty().SetColor(0., 0., 1.)
actor2.GetProperty().SetLineWidth(2.5)

# Create renderer
renderer = vtkRenderer()
renderer.AddViewProp(actor1)
renderer.AddViewProp(actor2)
renderer.SetBackground(.3, .4, .5)

# Create render window
window = vtkRenderWindow()
window.AddRenderer(renderer)
window.SetSize(500, 500)

# Create interactor
interactor = vtkRenderWindowInteractor()
interactor.SetRenderWindow(window)

# Start interaction
window.Render()
interactor.Start()