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

#
# Demonstrate the use of implicit selection loop as well as closest point
# connectivity
#
# create pipeline
#
sphere = vtk.vtkSphereSource()
sphere.SetRadius(1)
sphere.SetPhiResolution(100)
sphere.SetThetaResolution(100)
selectionPoints = vtk.vtkPoints()
selectionPoints.InsertPoint(0,0.07325,0.8417,0.5612)
selectionPoints.InsertPoint(1,0.07244,0.6568,0.7450)
selectionPoints.InsertPoint(2,0.1727,0.4597,0.8850)
selectionPoints.InsertPoint(3,0.3265,0.6054,0.7309)
selectionPoints.InsertPoint(4,0.5722,0.5848,0.5927)
selectionPoints.InsertPoint(5,0.4305,0.8138,0.4189)
loop = vtk.vtkImplicitSelectionLoop()
loop.SetLoop(selectionPoints)
extract = vtk.vtkExtractGeometry()
extract.SetInputConnection(sphere.GetOutputPort())
extract.SetImplicitFunction(loop)
connect = vtk.vtkConnectivityFilter()
connect.SetInputConnection(extract.GetOutputPort())
connect.SetExtractionModeToClosestPointRegion()
connect.SetClosestPoint(selectionPoints.GetPoint(0))
clipMapper = vtk.vtkDataSetMapper()
clipMapper.SetInputConnection(connect.GetOutputPort())
backProp = vtk.vtkProperty()
backProp.SetDiffuseColor(tomato)
clipActor = vtk.vtkActor()
clipActor.SetMapper(clipMapper)
clipActor.GetProperty().SetColor(peacock)
clipActor.SetBackfaceProperty(backProp)
# Create graphics stuff
#
ren1 = vtk.vtkRenderer()
renWin = vtk.vtkRenderWindow()
renWin.AddRenderer(ren1)
iren = vtk.vtkRenderWindowInteractor()
iren.SetRenderWindow(renWin)
# Add the actors to the renderer, set the background and size
#
ren1.AddActor(clipActor)
ren1.SetBackground(1,1,1)
ren1.ResetCamera()
ren1.GetActiveCamera().Azimuth(30)
ren1.GetActiveCamera().Elevation(30)
ren1.GetActiveCamera().Dolly(1.2)
ren1.ResetCameraClippingRange()
renWin.SetSize(400,400)
renWin.Render()
# render the image
#
# prevent the tk window from showing up then start the event loop
# --- end of script --
