ParaView-5.0.1: Added the source-tree to ThirdParty-dev and patched as described in the README file

Resolves bug-report http://bugs.openfoam.org/view.php?id=2098

ParaView-5.0.1/VTK/Examples/VisualizationAlgorithms/Python/ExtractGeometry.py

@@ -0,0 +1,73 @@
+#!/usr/bin/env python
+
+# This example shows how to extract a piece of a dataset using an
+# implicit function. In this case the implicit function is formed by
+# the boolean combination of two ellipsoids.
+
+import vtk
+
+# Here we create two ellipsoidal implicit functions and boolean them
+# together tto form a "cross" shaped implicit function.
+quadric = vtk.vtkQuadric()
+quadric.SetCoefficients(.5, 1, .2, 0, .1, 0, 0, .2, 0, 0)
+sample = vtk.vtkSampleFunction()
+sample.SetSampleDimensions(50, 50, 50)
+sample.SetImplicitFunction(quadric)
+sample.ComputeNormalsOff()
+trans = vtk.vtkTransform()
+trans.Scale(1, .5, .333)
+sphere = vtk.vtkSphere()
+sphere.SetRadius(0.25)
+sphere.SetTransform(trans)
+trans2 = vtk.vtkTransform()
+trans2.Scale(.25, .5, 1.0)
+sphere2 = vtk.vtkSphere()
+sphere2.SetRadius(0.25)
+sphere2.SetTransform(trans2)
+union = vtk.vtkImplicitBoolean()
+union.AddFunction(sphere)
+union.AddFunction(sphere2)
+union.SetOperationType(0) #union
+
+# Here is where it gets interesting. The implicit function is used to
+# extract those cells completely inside the function. They are then
+# shrunk to help show what was extracted.
+extract = vtk.vtkExtractGeometry()
+extract.SetInputConnection(sample.GetOutputPort())
+extract.SetImplicitFunction(union)
+shrink = vtk.vtkShrinkFilter()
+shrink.SetInputConnection(extract.GetOutputPort())
+shrink.SetShrinkFactor(0.5)
+dataMapper = vtk.vtkDataSetMapper()
+dataMapper.SetInputConnection(shrink.GetOutputPort())
+dataActor = vtk.vtkActor()
+dataActor.SetMapper(dataMapper)
+
+# The outline gives context to the original data.
+outline = vtk.vtkOutlineFilter()
+outline.SetInputConnection(sample.GetOutputPort())
+outlineMapper = vtk.vtkPolyDataMapper()
+outlineMapper.SetInputConnection(outline.GetOutputPort())
+outlineActor = vtk.vtkActor()
+outlineActor.SetMapper(outlineMapper)
+outlineProp = outlineActor.GetProperty()
+outlineProp.SetColor(0, 0, 0)
+
+# The usual rendering stuff is created.
+ren = vtk.vtkRenderer()
+renWin = vtk.vtkRenderWindow()
+renWin.AddRenderer(ren)
+iren = vtk.vtkRenderWindowInteractor()
+iren.SetRenderWindow(renWin)
+
+# Add the actors to the renderer, set the background and size
+ren.AddActor(outlineActor)
+ren.AddActor(dataActor)
+ren.SetBackground(1, 1, 1)
+renWin.SetSize(500, 500)
+ren.ResetCamera()
+ren.GetActiveCamera().Zoom(1.5)
+
+iren.Initialize()
+renWin.Render()
+iren.Start()