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/GUI/Python/VolumeRenderWithBoxWidget.py

@@ -0,0 +1,126 @@
+#!/usr/bin/env python
+
+# Demonstrate how to use the vtkBoxWidget to control volume rendering
+# within the interior of the widget.
+
+import vtk
+from vtk.util.misc import vtkGetDataRoot
+VTK_DATA_ROOT = vtkGetDataRoot()
+
+# Load a volume, use the widget to control what's volume
+# rendered. Basically the idea is that the vtkBoxWidget provides a box
+# which clips the volume rendering.
+v16 = vtk.vtkVolume16Reader()
+v16.SetDataDimensions(64, 64)
+v16.GetOutput().SetOrigin(0.0, 0.0, 0.0)
+v16.SetDataByteOrderToLittleEndian()
+v16.SetFilePrefix(VTK_DATA_ROOT+ "/Data/headsq/quarter")
+v16.SetImageRange(1, 93)
+v16.SetDataSpacing(3.2, 3.2, 1.5)
+
+tfun = vtk.vtkPiecewiseFunction()
+tfun.AddPoint(70.0, 0.0)
+tfun.AddPoint(599.0, 0)
+tfun.AddPoint(600.0, 0)
+tfun.AddPoint(1195.0, 0)
+tfun.AddPoint(1200, .2)
+tfun.AddPoint(1300, .3)
+tfun.AddPoint(2000, .3)
+tfun.AddPoint(4095.0, 1.0)
+
+ctfun = vtk.vtkColorTransferFunction()
+ctfun.AddRGBPoint(0.0, 0.5, 0.0, 0.0)
+ctfun.AddRGBPoint(600.0, 1.0, 0.5, 0.5)
+ctfun.AddRGBPoint(1280.0, 0.9, 0.2, 0.3)
+ctfun.AddRGBPoint(1960.0, 0.81, 0.27, 0.1)
+ctfun.AddRGBPoint(4095.0, 0.5, 0.5, 0.5)
+
+compositeFunction = vtk.vtkVolumeRayCastCompositeFunction()
+
+volumeMapper = vtk.vtkVolumeRayCastMapper()
+volumeMapper.SetInputConnection(v16.GetOutputPort())
+volumeMapper.SetVolumeRayCastFunction(compositeFunction)
+
+volumeProperty = vtk.vtkVolumeProperty()
+volumeProperty.SetColor(ctfun)
+volumeProperty.SetScalarOpacity(tfun)
+volumeProperty.SetInterpolationTypeToLinear()
+volumeProperty.ShadeOn()
+
+newvol = vtk.vtkVolume()
+newvol.SetMapper(volumeMapper)
+newvol.SetProperty(volumeProperty)
+
+outline = vtk.vtkOutlineFilter()
+outline.SetInputConnection(v16.GetOutputPort())
+outlineMapper = vtk.vtkPolyDataMapper()
+outlineMapper.SetInputConnection(outline.GetOutputPort())
+outlineActor = vtk.vtkActor()
+outlineActor.SetMapper(outlineMapper)
+
+# Create the RenderWindow, Renderer and both Actors
+ren = vtk.vtkRenderer()
+renWin = vtk.vtkRenderWindow()
+renWin.AddRenderer(ren)
+iren = vtk.vtkRenderWindowInteractor()
+iren.SetRenderWindow(renWin)
+
+# The SetInteractor method is how 3D widgets are associated with the
+# render window interactor. Internally, SetInteractor sets up a bunch
+# of callbacks using the Command/Observer mechanism (AddObserver()).
+boxWidget = vtk.vtkBoxWidget()
+boxWidget.SetInteractor(iren)
+boxWidget.SetPlaceFactor(1.0)
+
+# Add the actors to the renderer, set the background and size
+ren.AddActor(outlineActor)
+ren.AddVolume(newvol)
+
+ren.SetBackground(0, 0, 0)
+renWin.SetSize(300, 300)
+
+# When interaction starts, the requested frame rate is increased.
+def StartInteraction(obj, event):
+    global renWin
+    renWin.SetDesiredUpdateRate(10)
+
+# When interaction ends, the requested frame rate is decreased to
+# normal levels. This causes a full resolution render to occur.
+def EndInteraction(obj, event):
+    global renWin
+    renWin.SetDesiredUpdateRate(0.001)
+
+# The implicit function vtkPlanes is used in conjunction with the
+# volume ray cast mapper to limit which portion of the volume is
+# volume rendered.
+planes = vtk.vtkPlanes()
+def ClipVolumeRender(obj, event):
+    global planes, volumeMapper
+    obj.GetPlanes(planes)
+    volumeMapper.SetClippingPlanes(planes)
+
+
+# Place the interactor initially. The output of the reader is used to
+# place the box widget.
+boxWidget.SetInputConnection(v16.GetOutputPort())
+boxWidget.PlaceWidget()
+boxWidget.InsideOutOn()
+boxWidget.AddObserver("StartInteractionEvent", StartInteraction)
+boxWidget.AddObserver("InteractionEvent", ClipVolumeRender)
+boxWidget.AddObserver("EndInteractionEvent", EndInteraction)
+
+outlineProperty = boxWidget.GetOutlineProperty()
+outlineProperty.SetRepresentationToWireframe()
+outlineProperty.SetAmbient(1.0)
+outlineProperty.SetAmbientColor(1, 1, 1)
+outlineProperty.SetLineWidth(3)
+
+selectedOutlineProperty = boxWidget.GetSelectedOutlineProperty()
+selectedOutlineProperty.SetRepresentationToWireframe()
+selectedOutlineProperty.SetAmbient(1.0)
+selectedOutlineProperty.SetAmbientColor(1, 0, 0)
+selectedOutlineProperty.SetLineWidth(3)
+
+iren.Initialize()
+renWin.Render()
+iren.Start()