Adding IOPLY python tests

Change-Id: I40f1c2985891a923e116aea1fe07dfee3695082a

IO/PLY/Testing/Python/CMakeLists.txt

+add_test_python(TestPLYReadWrite.py IO)

IO/PLY/Testing/Python/TestPLYReadWrite.py

+#!/usr/bin/env python
+import vtk
+from vtk.test import Testing
+from vtk.util.misc import vtkGetDataRoot
+VTK_DATA_ROOT = vtkGetDataRoot()
+
+ss = vtk.vtkSphereSource()
+ss.SetPhiResolution(10)
+ss.SetThetaResolution(20)
+ele = vtk.vtkSimpleElevationFilter()
+ele.SetInputConnection(ss.GetOutputPort())
+pd2cd = vtk.vtkPointDataToCellData()
+pd2cd.SetInputConnection(ele.GetOutputPort())
+# First way or writing
+w = vtk.vtkPLYWriter()
+w.SetInputConnection(pd2cd.GetOutputPort())
+w.SetFileName("plyWriter.ply")
+w.SetFileTypeToBinary()
+w.SetDataByteOrderToLittleEndian()
+w.SetColorModeToUniformCellColor()
+w.SetColor(255,0,0)
+w.Write()
+r = vtk.vtkPLYReader()
+r.SetFileName("plyWriter.ply")
+r.Update()
+file.delete("-force", "plyWriter.ply")
+plyMapper = vtk.vtkPolyDataMapper()
+plyMapper.SetInputConnection(r.GetOutputPort())
+plyActor = vtk.vtkActor()
+plyActor.SetMapper(plyMapper)
+# Second way or writing - it will map through a lookup table
+lut = vtk.vtkLookupTable()
+lut.Build()
+w2 = vtk.vtkPLYWriter()
+w2.SetInputConnection(pd2cd.GetOutputPort())
+w2.SetFileName("plyWriter.ply")
+w2.SetFileTypeToBinary()
+w2.SetDataByteOrderToLittleEndian()
+w2.SetColorModeToDefault()
+w2.SetLookupTable(lut)
+w2.SetArrayName("Elevation")
+w2.SetComponent(0)
+w2.Write()
+r2 = vtk.vtkPLYReader()
+r2.SetFileName("plyWriter.ply")
+r2.Update()
+plyMapper2 = vtk.vtkPolyDataMapper()
+plyMapper2.SetInputConnection(r2.GetOutputPort())
+plyActor2 = vtk.vtkActor()
+plyActor2.SetMapper(plyMapper2)
+plyActor2.AddPosition(1,0,0)
+# Third way or writing - it will read the previous file with rgb cell color
+r3 = vtk.vtkPLYReader()
+r3.SetFileName("plyWriter.ply")
+r3.Update()
+w3 = vtk.vtkPLYWriter()
+w3.SetInputConnection(r3.GetOutputPort())
+w3.SetFileName("plyWriter.ply")
+w3.SetFileTypeToBinary()
+w3.SetDataByteOrderToLittleEndian()
+w3.SetColorModeToDefault()
+w3.SetArrayName("RGB")
+w3.SetComponent(0)
+w3.Write()
+r4 = vtk.vtkPLYReader()
+r4.SetFileName("plyWriter.ply")
+r4.Update()
+plyMapper3 = vtk.vtkPolyDataMapper()
+plyMapper3.SetInputConnection(r4.GetOutputPort())
+plyActor3 = vtk.vtkActor()
+plyActor3.SetMapper(plyMapper3)
+plyActor3.AddPosition(2,0,0)
+file.delete("-force", "plyWriter.ply")
+# Create the RenderWindow, Renderer and both Actors
+#
+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(plyActor)
+ren1.AddActor(plyActor2)
+ren1.AddActor(plyActor3)
+renWin.SetSize(325,125)
+iren.Initialize()
+renWin.Render()
+ren1.GetActiveCamera().Zoom(3.0)
+# prevent the tk window from showing up then start the event loop
+# --- end of script --