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#!/usr/bin/env python
"""
Create a HTG
without mask
during HTG build we build scalar, used Global Index implicit with SetGlobalIndexStart
SetGlobalIndexStart, one call by HT
"""
from vtkmodules.vtkCommonCore import (
vtkDoubleArray,
vtkLookupTable,
)
from vtkmodules.vtkCommonDataModel import (
vtkHyperTreeGrid,
vtkHyperTreeGridNonOrientedCursor,
)
from vtkmodules.vtkFiltersHyperTree import vtkHyperTreeGridGeometry
from vtkmodules.vtkRenderingCore import (
vtkActor,
vtkCamera,
vtkDataSetMapper,
vtkRenderWindow,
vtkRenderWindowInteractor,
vtkRenderer,
)
import vtkmodules.vtkInteractionStyle
import vtkmodules.vtkRenderingFreeType
import vtkmodules.vtkRenderingOpenGL2
htg = vtkHyperTreeGrid()
htg.Initialize()
scalarArray = vtkDoubleArray()
scalarArray.SetName('scalar')
scalarArray.SetNumberOfValues(0)
htg.GetCellData().AddArray(scalarArray)
htg.GetCellData().SetActiveScalars('scalar')
htg.SetDimensions([4, 3, 3])
htg.SetBranchFactor(2)
# Rectilinear grid coordinates
xValues = vtkDoubleArray()
xValues.SetNumberOfValues(4)
xValues.SetValue(0, -1)
xValues.SetValue(1, 0)
xValues.SetValue(2, 1)
xValues.SetValue(3, 2)
htg.SetXCoordinates(xValues);
yValues = vtkDoubleArray()
yValues.SetNumberOfValues(3)
yValues.SetValue(0, -1)
yValues.SetValue(1, 0)
yValues.SetValue(2, 1)
htg.SetYCoordinates(yValues);
zValues = 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 = 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())
# Geometries
geometry = vtkHyperTreeGridGeometry()
geometry.SetInputData(htg)
print('With Geometry Filter (HTG to NS)')
# LookupTable
lut = vtkLookupTable()
lut.SetHueRange(0.66, 0)
lut.UsingLogScale()
lut.Build()
# Mappers
mapper = 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 = vtkActor()
actor1.SetMapper(mapper)
actor2 = vtkActor()
actor2.SetMapper(mapper)
actor2.GetProperty().SetColor(0, 0, 0)
actor2.GetProperty().SetRepresentationToWireframe()
# Camera
bd = htg.GetBounds()
camera = 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 = vtkRenderer()
renderer.SetActiveCamera(camera)
renderer.AddActor(actor1)
renderer.AddActor(actor2)
# Render window
renWin = vtkRenderWindow()
renWin.AddRenderer(renderer)
renWin.SetSize(600, 400)
# Render window interactor
iren = 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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