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/ImageProcessing/Python/ImageSlicing.py

@@ -0,0 +1,129 @@
+#!/usr/bin/env python
+
+# This example shows how to load a 3D image into VTK and then reformat
+# that image into a different orientation for viewing.  It uses
+# vtkImageReslice for reformatting the image, and uses vtkImageActor
+# and vtkInteractorStyleImage to display the image.  This InteractorStyle
+# forces the camera to stay perpendicular to the XY plane.
+
+import vtk
+from vtk.util.misc import vtkGetDataRoot
+VTK_DATA_ROOT = vtkGetDataRoot()
+
+# Start by loading some data.
+reader = vtk.vtkImageReader2()
+reader.SetFilePrefix(VTK_DATA_ROOT + "/Data/headsq/quarter")
+reader.SetDataExtent(0, 63, 0, 63, 1, 93)
+reader.SetDataSpacing(3.2, 3.2, 1.5)
+reader.SetDataOrigin(0.0, 0.0, 0.0)
+reader.SetDataScalarTypeToUnsignedShort()
+reader.UpdateWholeExtent()
+
+# Calculate the center of the volume
+reader.Update()
+(xMin, xMax, yMin, yMax, zMin, zMax) = reader.GetExecutive().GetWholeExtent(reader.GetOutputInformation(0))
+(xSpacing, ySpacing, zSpacing) = reader.GetOutput().GetSpacing()
+(x0, y0, z0) = reader.GetOutput().GetOrigin()
+
+center = [x0 + xSpacing * 0.5 * (xMin + xMax),
+          y0 + ySpacing * 0.5 * (yMin + yMax),
+          z0 + zSpacing * 0.5 * (zMin + zMax)]
+
+# Matrices for axial, coronal, sagittal, oblique view orientations
+axial = vtk.vtkMatrix4x4()
+axial.DeepCopy((1, 0, 0, center[0],
+                0, 1, 0, center[1],
+                0, 0, 1, center[2],
+                0, 0, 0, 1))
+
+coronal = vtk.vtkMatrix4x4()
+coronal.DeepCopy((1, 0, 0, center[0],
+                  0, 0, 1, center[1],
+                  0,-1, 0, center[2],
+                  0, 0, 0, 1))
+
+sagittal = vtk.vtkMatrix4x4()
+sagittal.DeepCopy((0, 0,-1, center[0],
+                   1, 0, 0, center[1],
+                   0,-1, 0, center[2],
+                   0, 0, 0, 1))
+
+oblique = vtk.vtkMatrix4x4()
+oblique.DeepCopy((1, 0, 0, center[0],
+                  0, 0.866025, -0.5, center[1],
+                  0, 0.5, 0.866025, center[2],
+                  0, 0, 0, 1))
+
+# Extract a slice in the desired orientation
+reslice = vtk.vtkImageReslice()
+reslice.SetInputConnection(reader.GetOutputPort())
+reslice.SetOutputDimensionality(2)
+reslice.SetResliceAxes(sagittal)
+reslice.SetInterpolationModeToLinear()
+
+# Create a greyscale lookup table
+table = vtk.vtkLookupTable()
+table.SetRange(0, 2000) # image intensity range
+table.SetValueRange(0.0, 1.0) # from black to white
+table.SetSaturationRange(0.0, 0.0) # no color saturation
+table.SetRampToLinear()
+table.Build()
+
+# Map the image through the lookup table
+color = vtk.vtkImageMapToColors()
+color.SetLookupTable(table)
+color.SetInputConnection(reslice.GetOutputPort())
+
+# Display the image
+actor = vtk.vtkImageActor()
+actor.GetMapper().SetInputConnection(color.GetOutputPort())
+
+renderer = vtk.vtkRenderer()
+renderer.AddActor(actor)
+
+window = vtk.vtkRenderWindow()
+window.AddRenderer(renderer)
+
+# Set up the interaction
+interactorStyle = vtk.vtkInteractorStyleImage()
+interactor = vtk.vtkRenderWindowInteractor()
+interactor.SetInteractorStyle(interactorStyle)
+window.SetInteractor(interactor)
+window.Render()
+
+# Create callbacks for slicing the image
+actions = {}
+actions["Slicing"] = 0
+
+def ButtonCallback(obj, event):
+    if event == "LeftButtonPressEvent":
+        actions["Slicing"] = 1
+    else:
+        actions["Slicing"] = 0
+
+def MouseMoveCallback(obj, event):
+    (lastX, lastY) = interactor.GetLastEventPosition()
+    (mouseX, mouseY) = interactor.GetEventPosition()
+    if actions["Slicing"] == 1:
+        deltaY = mouseY - lastY
+        reslice.Update()
+        sliceSpacing = reslice.GetOutput().GetSpacing()[2]
+        matrix = reslice.GetResliceAxes()
+        # move the center point that we are slicing through
+        center = matrix.MultiplyPoint((0, 0, sliceSpacing*deltaY, 1))
+        matrix.SetElement(0, 3, center[0])
+        matrix.SetElement(1, 3, center[1])
+        matrix.SetElement(2, 3, center[2])
+        window.Render()
+    else:
+        interactorStyle.OnMouseMove()
+
+
+interactorStyle.AddObserver("MouseMoveEvent", MouseMoveCallback)
+interactorStyle.AddObserver("LeftButtonPressEvent", ButtonCallback)
+interactorStyle.AddObserver("LeftButtonReleaseEvent", ButtonCallback)
+
+# Start interaction
+interactor.Start()
+
+