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#!/usr/bin/env python
import vtk
htg = vtk.vtkHyperTreeGrid()
htg.Initialize()
scalarArray = vtk.vtkDoubleArray()
scalarArray.SetName('scalar')
scalarArray.SetNumberOfValues(0)
htg.GetPointData().AddArray(scalarArray)
htg.GetPointData().SetActiveScalars('scalar')
htg.SetDimensions([4, 3, 3])
htg.SetBranchFactor(2)
# Rectilinear grid coordinates
xValues = vtk.vtkDoubleArray()
xValues.SetNumberOfValues(4)
xValues.SetValue(0, -1)
xValues.SetValue(1, 0)
xValues.SetValue(2, 1)
xValues.SetValue(3, 2)
htg.SetXCoordinates(xValues);
yValues = vtk.vtkDoubleArray()
yValues.SetNumberOfValues(3)
yValues.SetValue(0, -1)
yValues.SetValue(1, 0)
yValues.SetValue(2, 1)
htg.SetYCoordinates(yValues);
zValues = vtk.vtkDoubleArray()
zValues.SetNumberOfValues(4)
zValues.SetValue(0, -1)
zValues.SetValue(1, 0)
zValues.SetValue(2, 1)
zValues.SetValue(3, 2)
htg.SetZCoordinates(zValues);
# Let's split the various trees
cursor = vtk.vtkHyperTreeGridNonOrientedCursor()
offsetIndex = 0
# ROOT CELL 0-5
for iHT in range(6):
htg.InitializeNonOrientedCursor(cursor, iHT, True)
cursor.SetGlobalIndexStart(offsetIndex)
idx = cursor.GetGlobalNodeIndex()
scalarArray.InsertTuple1(idx, iHT+1)
offsetIndex += cursor.GetTree().GetNumberOfVertices()
# ROOT CELL 6
htg.InitializeNonOrientedCursor(cursor, 6, True)
cursor.SetGlobalIndexStart(offsetIndex)
idx = cursor.GetGlobalNodeIndex()
scalarArray.InsertTuple1(idx, 7)
cursor.SubdivideLeaf()
# ROOT CELL 6/[0-7]
for ichild in range(8):
cursor.ToChild(ichild)
idx = cursor.GetGlobalNodeIndex()
scalarArray.InsertTuple1(idx, 13+ichild)
cursor.ToParent()
offsetIndex += cursor.GetTree().GetNumberOfVertices()
# ROOT CELL 7
htg.InitializeNonOrientedCursor(cursor, 7, True)
cursor.SetGlobalIndexStart(offsetIndex)
idx = cursor.GetGlobalNodeIndex()
scalarArray.InsertTuple1(idx, 8)
offsetIndex += cursor.GetTree().GetNumberOfVertices()
# ROOT CELL 8
htg.InitializeNonOrientedCursor(cursor, 8, True)
cursor.SetGlobalIndexStart(offsetIndex)
idx = cursor.GetGlobalNodeIndex()
scalarArray.InsertTuple1(idx, 9)
cursor.SubdivideLeaf()
# ROOT CELL 8/[0-7]
for ichild in range(8):
cursor.ToChild(ichild)
idx = cursor.GetGlobalNodeIndex()
scalarArray.InsertTuple1(idx, 21+ichild)
cursor.ToParent()
offsetIndex += cursor.GetTree().GetNumberOfVertices()
# ROOT CELL 9
htg.InitializeNonOrientedCursor(cursor, 9, True)
cursor.SetGlobalIndexStart(offsetIndex)
idx = cursor.GetGlobalNodeIndex()
scalarArray.InsertTuple1(idx, 10)
offsetIndex += cursor.GetTree().GetNumberOfVertices()
# ROOT CELL 10
htg.InitializeNonOrientedCursor(cursor, 10, True)
cursor.SetGlobalIndexStart(offsetIndex)
idx = cursor.GetGlobalNodeIndex()
scalarArray.InsertTuple1(idx, 11)
cursor.SubdivideLeaf()
# ROOT CELL 10/[0-7]
for ichild in range(8):
cursor.ToChild(ichild)
idx = cursor.GetGlobalNodeIndex()
scalarArray.InsertTuple1(idx, 29+ichild)
cursor.ToParent()
cursor.ToChild(7)
cursor.SubdivideLeaf()
# ROOT CELL 4/3/[0-3]
for ichild in range(8):
cursor.ToChild(ichild)
idx = cursor.GetGlobalNodeIndex()
scalarArray.InsertTuple1(idx, 37+ichild)
cursor.ToParent()
cursor.ToChild(4)
cursor.SubdivideLeaf()
# ROOT CELL 4/3/0/[0-3]
for ichild in range(8):
cursor.ToChild(ichild)
idx = cursor.GetGlobalNodeIndex()
scalarArray.InsertTuple1(idx, 46+ichild)
cursor.ToParent()
offsetIndex += cursor.GetTree().GetNumberOfVertices()
# ROOT CELL 11
htg.InitializeNonOrientedCursor(cursor, 11, True)
cursor.SetGlobalIndexStart(offsetIndex)
idx = cursor.GetGlobalNodeIndex()
scalarArray.InsertTuple1(idx, 12)
print('#',scalarArray.GetNumberOfTuples())
print('DataRange: ',scalarArray.GetRange())
isFilter = False
# Depth Limiter Filter
depth = None
if True:
print('With Depth Limiter Filter (HTG)')
depth = vtk.vtkHyperTreeGridDepthLimiter()
depth.SetInputData(htg)
depth.SetDepth(2)
isFilter = True
else:
print('Without Depth Limiter Filter (HTG)')
depth = htg
# Threshold Filter
threshold = None
if True:
print('With Threshold Filter (HTG)')
threshold = vtk.vtkHyperTreeGridThreshold()
if isFilter:
threshold.SetInputConnection(depth.GetOutputPort())
else:
threshold.SetInputData(depth)
threshold.ThresholdBetween(9,9999)
isFilter = True
else:
print('No Threshold Filter (HTG)')
threshold = depth
# Axis reflection
reflection = None
if True:
print('With AxisReflection Filter (HTG)')
reflection = vtk.vtkHyperTreeGridAxisReflection()
if isFilter:
reflection.SetInputConnection(threshold.GetOutputPort())
else:
reflection.SetInputData(threshold)
reflection.SetPlaneToY()
reflection.SetCenter(0)
isFilter = True
else:
print('No AxisReflection Filter (HTG)')
reflection = threshold
# Geometries
geometry = vtk.vtkHyperTreeGridGeometry()
if isFilter:
geometry.SetInputConnection(reflection.GetOutputPort())
else:
geometry.SetInputData(reflection)
print('With Geometry Filter (HTG to NS)')
# Shrink Filter
if True:
print('With Shrink Filter (NS)')
# En 3D, le shrink ne doit pas se faire sur la geometrie car elle ne represente que la peau
shrink = vtk.vtkShrinkFilter()
shrink.SetInputConnection(geometry.GetOutputPort())
shrink.SetShrinkFactor(.8)
else:
print('No Shrink Filter (NS)')
shrink = geometry
# LookupTable
lut = vtk.vtkLookupTable()
lut.SetHueRange(0.66, 0)
lut.UsingLogScale()
lut.Build()
# Mappers
mapper = vtk.vtkDataSetMapper()
mapper.SetInputConnection(geometry.GetOutputPort())
mapper.SetLookupTable(lut)
mapper.SetColorModeToMapScalars()
mapper.SetScalarModeToUseCellFieldData()
mapper.SelectColorArray('scalar')
dataRange = [1,53] # Forced for compare with 3DMask
mapper.SetScalarRange(dataRange[0], dataRange[1])
# Actors
actor1 = vtk.vtkActor()
actor1.SetMapper(mapper)
actor2 = vtk.vtkActor()
actor2.SetMapper(mapper)
actor2.GetProperty().SetColor(0, 0, 0)
actor2.GetProperty().SetRepresentationToWireframe()
# Camera
bd = htg.GetBounds()
camera = vtk.vtkCamera()
camera.SetClippingRange(1., 100.)
focal = []
for i in range(3):
focal.append(bd[ 2 * i ] + (bd[ 2 * i + 1 ] - bd[ 2 * i]) / 2.)
camera.SetFocalPoint(focal)
camera.SetPosition(focal[0]+4, focal[1]+3, focal[2] + 6.)
# Renderer
renderer = vtk.vtkRenderer()
renderer.SetActiveCamera(camera)
renderer.AddActor(actor1)
renderer.AddActor(actor2)
# Render window
renWin = vtk.vtkRenderWindow()
renWin.AddRenderer(renderer)
renWin.SetSize(600, 400)
# Render window interactor
iren = vtk.vtkRenderWindowInteractor()
iren.SetRenderWindow(renWin)
# render the image
renWin.Render()
# iren.Start()
# prevent the tk window from showing up then start the event loop
# --- end of script --
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