vtkMarchingCubes: Update tests to account for orientation

Filters/General/Testing/Data/Baseline/TestDiscreteMarchingCubes.png.sha512

-a91672e8647abac2f800f3817df97de2b40b28d2a16d2831fef3a4ad26802e970dc06cd9d05d0198ed48c941e0edcca6e6dede5071ce5ed3a7ce52fabae18c4c
+79a8682a5f9541014662bb7cca944b1e44b0e2312d203522eaa5399651727d23121aad785f441894ac52382d224603c9f198e49250d0eecfec794d754ded2116

Filters/General/Testing/Python/TestDiscreteMarchingCubes.py

 #!/usr/bin/env python
 import vtk
+from math import cos, sin, pi
 from vtk.util.misc import vtkGetDataRoot
 VTK_DATA_ROOT = vtkGetDataRoot()
 
@@ -72,6 +73,14 @@ while i < n:
 
     i += 1
 
+angle = pi/6
+orientation = [
+  -cos(angle), 0, sin(angle),
+  0, 1, 0,
+  sin(angle), 0, cos(angle),
+]
+blobImage.SetDirectionMatrix(orientation)
+
 discrete = vtk.vtkDiscreteMarchingCubes()
 discrete.SetInputData(blobImage)
 discrete.GenerateValues(n, 1, n)

Filters/General/Testing/Python/TestMarchingCubes.py

 #!/usr/bin/env python
 import vtk
+from math import cos, sin, pi
 from vtk.util.misc import vtkGetDataRoot
 VTK_DATA_ROOT = vtkGetDataRoot()
 
@@ -13,12 +14,20 @@ iren.SetRenderWindow(renWin)
 
 # create pipeline
 #
+angle = pi/2
+orientation = [
+  -1, 0, 0,
+  0, cos(angle), -sin(angle),
+  0, -sin(angle), -cos(angle)
+]
 v16 = vtk.vtkVolume16Reader()
 v16.SetDataDimensions(64, 64)
 v16.SetDataByteOrderToLittleEndian()
 v16.SetFilePrefix(VTK_DATA_ROOT + "/Data/headsq/quarter")
 v16.SetImageRange(1, 93)
 v16.SetDataSpacing(3.2, 3.2, 1.5)
+v16.SetDataOrigin(0.1, 10, 1000)
+v16.GetOutput().SetDirectionMatrix(orientation)
 v16.Update()
 
 iso = vtk.vtkMarchingCubes()
@@ -39,13 +48,7 @@ ren1.AddActor(isoActor)
 ren1.SetBackground(0.2, 0.3, 0.4)
 
 renWin.SetSize(200, 200)
-
 ren1.ResetCamera()
-ren1.GetActiveCamera().Elevation(90)
-ren1.GetActiveCamera().SetViewUp(0, 0, -1)
-ren1.GetActiveCamera().Azimuth(180)
-ren1.ResetCameraClippingRange()
-
 renWin.Render()
 
 # render the image

Filters/Modeling/Testing/Python/TestImageMarchingCubes.py

 #!/usr/bin/env python
 import vtk
+from math import cos, sin, pi
 from vtk.util.misc import vtkGetDataRoot
 VTK_DATA_ROOT = vtkGetDataRoot()
 
@@ -22,12 +23,19 @@ iren.SetRenderWindow(renWin)
 
 # create pipeline
 #
+angle = pi/2
+orientation = [
+  -1, 0, 0,
+  0, cos(angle), -sin(angle),
+  0, -sin(angle), -cos(angle)
+]
 reader = vtk.vtkImageReader2()
 reader.SetDataScalarTypeToUnsignedShort()
 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.GetOutput().SetDirectionMatrix(orientation)
 
 iso = vtk.vtkImageMarchingCubes()
 iso.SetInputConnection(reader.GetOutputPort())
@@ -59,13 +67,7 @@ ren1.AddActor(isoActor)
 ren1.SetBackground(0.2, 0.3, 0.4)
 
 renWin.SetSize(200, 200)
-
 ren1.ResetCamera()
-ren1.GetActiveCamera().Elevation(90)
-ren1.GetActiveCamera().SetViewUp(0, 0, -1)
-ren1.GetActiveCamera().Azimuth(180)
-ren1.ResetCameraClippingRange()
-
 renWin.Render()
 
 # render the image