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#!/usr/bin/env python
import os
from vtkmodules.vtkCommonCore import vtkLookupTable
from vtkmodules.vtkFiltersCore import (
vtkExtractEdges,
vtkStripper,
)
from vtkmodules.vtkFiltersGeneral import (
vtkClipClosedSurface,
vtkCurvatures,
)
from vtkmodules.vtkIOMINC import (
vtkMNIObjectReader,
vtkMNIObjectWriter,
)
from vtkmodules.vtkRenderingCore import (
vtkActor,
vtkDataSetMapper,
vtkProperty,
vtkRenderWindow,
vtkRenderWindowInteractor,
vtkRenderer,
)
import vtkmodules.vtkInteractionStyle
import vtkmodules.vtkRenderingFreeType
import vtkmodules.vtkRenderingOpenGL2
from vtkmodules.util.misc import vtkGetDataRoot
VTK_DATA_ROOT = vtkGetDataRoot()
# The current directory must be writeable.
#
try:
channel = open("mni-surface-mesh-binary.obj", "wb")
channel.close()
ren1 = vtkRenderer()
ren1.SetViewport(0, 0, 0.33, 1)
ren2 = vtkRenderer()
ren2.SetViewport(0.33, 0, 0.67, 1)
ren3 = vtkRenderer()
ren3.SetViewport(0.67, 0, 1, 1)
renWin = vtkRenderWindow()
renWin.SetSize(600, 200)
renWin.AddRenderer(ren1)
renWin.AddRenderer(ren2)
renWin.AddRenderer(ren3)
renWin.SetMultiSamples(0)
property0 = vtkProperty()
property0.SetDiffuseColor(0.95, 0.90, 0.70)
filename = VTK_DATA_ROOT + "/Data/mni-surface-mesh.obj"
asciiReader = vtkMNIObjectReader()
property1 = asciiReader.GetProperty()
if (asciiReader.CanReadFile(str(filename)) != 0):
asciiReader.SetFileName(str(filename))
# this is just to remove the normals, to increase coverage,
# i.e. by forcing the writer to generate normals
removeNormals = vtkClipClosedSurface()
removeNormals.SetInputConnection(asciiReader.GetOutputPort())
# this is to make triangle strips, also to increase coverage,
# because it forces the writer to decompose the strips
stripper = vtkStripper()
stripper.SetInputConnection(removeNormals.GetOutputPort())
# test binary writing and reading for polygons
binaryWriter = vtkMNIObjectWriter()
binaryWriter.SetInputConnection(stripper.GetOutputPort())
binaryWriter.SetFileName("mni-surface-mesh-binary.obj")
binaryWriter.SetProperty(property0)
binaryWriter.SetFileTypeToBinary()
binaryWriter.Write()
binaryReader = vtkMNIObjectReader()
binaryReader.SetFileName("mni-surface-mesh-binary.obj")
property2 = binaryReader.GetProperty()
# make a polyline object with color scalars
scalars = vtkCurvatures()
scalars.SetInputConnection(asciiReader.GetOutputPort())
colors = vtkLookupTable()
colors.SetRange(-14.5104, 29.0208)
colors.SetAlphaRange(1.0, 1.0)
colors.SetSaturationRange(1.0, 1.0)
colors.SetValueRange(1.0, 1.0)
colors.SetHueRange(0.0, 1.0)
colors.Build()
# this is just to test using the SetMapper option of vtkMNIObjectWriter
mapper = vtkDataSetMapper()
mapper.SetLookupTable(colors)
mapper.UseLookupTableScalarRangeOn()
edges = vtkExtractEdges()
edges.SetInputConnection(scalars.GetOutputPort())
# test ascii writing and reading for lines
lineWriter = vtkMNIObjectWriter()
lineWriter.SetMapper(mapper)
# lineWriter SetLookupTable colors
lineWriter.SetInputConnection(edges.GetOutputPort())
lineWriter.SetFileName("mni-wire-mesh-ascii.obj")
lineWriter.Write()
lineReader = vtkMNIObjectReader()
lineReader.SetFileName("mni-wire-mesh-ascii.obj")
# display all the results
mapper1 = vtkDataSetMapper()
mapper1.SetInputConnection(asciiReader.GetOutputPort())
mapper2 = vtkDataSetMapper()
mapper2.SetInputConnection(binaryReader.GetOutputPort())
mapper3 = vtkDataSetMapper()
mapper3.SetInputConnection(lineReader.GetOutputPort())
actor1 = vtkActor()
actor1.SetMapper(mapper1)
actor1.SetProperty(property1)
actor2 = vtkActor()
actor2.SetMapper(mapper2)
actor2.SetProperty(property2)
actor3 = vtkActor()
actor3.SetMapper(mapper3)
ren1.AddActor(actor1)
ren2.AddActor(actor2)
ren3.AddActor(actor3)
iren = vtkRenderWindowInteractor()
iren.SetRenderWindow(renWin)
ren1.ResetCamera()
ren1.GetActiveCamera().Dolly(1.2)
ren1.ResetCameraClippingRange()
ren2.ResetCamera()
ren2.GetActiveCamera().Dolly(1.2)
ren2.ResetCameraClippingRange()
ren3.ResetCamera()
ren3.GetActiveCamera().Dolly(1.2)
ren3.ResetCameraClippingRange()
iren.Render()
# cleanup
#
try:
os.remove("mni-surface-mesh-binary.obj")
except OSError:
pass
try:
os.remove("mni-wire-mesh-ascii.obj")
except OSError:
pass
# render the image
#
iren.Initialize()
# iren.Start()
except IOError:
print("Unable to test the writer/reader.")
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