#!/usr/bin/env python
import vtk
from vtk.util.misc import vtkGetDataRoot
VTK_DATA_ROOT = vtkGetDataRoot()

# Create the RenderWindow, Renderer and both Actors
#
ren1 = vtk.vtkRenderer()
renWin = vtk.vtkRenderWindow()
renWin.AddRenderer(ren1)
iren = vtk.vtkRenderWindowInteractor()
iren.SetRenderWindow(renWin)
sphere = vtk.vtkSphereSource()
sphereMapper = vtk.vtkPolyDataMapper()
sphereMapper.SetInputConnection(sphere.GetOutputPort())
sphereActor = vtk.vtkActor()
sphereActor.SetMapper(sphereMapper)
coneGlyph = vtk.vtkConeSource()
coneGlyph.SetResolution(6)
sphereGlyph = vtk.vtkSphereSource()
sphereGlyph.SetThetaResolution(12)
sphereGlyph.SetPhiResolution(6)
caption = vtk.vtkCaptionActor2D()
caption.SetCaption("This is the\nsouth pole")
caption.SetAttachmentPoint(0,0,-0.5)
caption.GetPositionCoordinate().SetCoordinateSystemToNormalizedViewport()
caption.GetPositionCoordinate().SetReferenceCoordinate(None)
caption.GetPositionCoordinate().SetValue(0.05,0.05)
caption.SetWidth(0.25)
caption.SetHeight(0.15)
caption.ThreeDimensionalLeaderOn()
caption.SetLeaderGlyphConnection(coneGlyph.GetOutputPort())
caption.SetMaximumLeaderGlyphSize(10)
caption.SetLeaderGlyphSize(0.025)
caption.GetProperty().SetColor(1,0,0)
tprop = caption.GetCaptionTextProperty()
tprop.SetColor(caption.GetProperty().GetColor())
caption2 = vtk.vtkCaptionActor2D()
caption2.SetCaption("Santa lives here")
caption2.GetProperty().SetColor(1,0,0)
caption2.SetAttachmentPoint(0,0,0.5)
caption2.SetHeight(0.05)
caption2.BorderOff()
caption2.SetPosition(25,10)
caption2.ThreeDimensionalLeaderOff()
caption2.SetLeaderGlyphConnection(coneGlyph.GetOutputPort())
caption2.SetWidth(0.35)
caption2.SetHeight(0.10)
caption2.SetMaximumLeaderGlyphSize(10)
caption2.SetLeaderGlyphSize(0.025)
tprop = caption2.GetCaptionTextProperty()
tprop.SetColor(caption2.GetProperty().GetColor())
ren1.AddActor2D(caption2)
ren1.AddActor2D(caption)
ren1.AddActor(sphereActor)
ren1.SetBackground(1,1,1)
ren1.GetActiveCamera().SetFocalPoint(0,0,0)
ren1.GetActiveCamera().SetPosition(1,0,0)
ren1.GetActiveCamera().SetViewUp(0,0,1)
ren1.ResetCamera()
renWin.SetSize(250,250)
# render the image
#
renWin.Render()
# prevent the tk window from showing up then start the event loop
# --- end of script --