1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
|
#!/usr/bin/env python
import os
import vtk
from vtk.test import Testing
from vtk.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 = vtk.vtkRenderer()
ren1.SetViewport(0, 0, 0.33, 1)
ren2 = vtk.vtkRenderer()
ren2.SetViewport(0.33, 0, 0.67, 1)
ren3 = vtk.vtkRenderer()
ren3.SetViewport(0.67, 0, 1, 1)
renWin = vtk.vtkRenderWindow()
renWin.SetSize(600, 200)
renWin.AddRenderer(ren1)
renWin.AddRenderer(ren2)
renWin.AddRenderer(ren3)
renWin.SetMultiSamples(0)
property0 = vtk.vtkProperty()
property0.SetDiffuseColor(0.95, 0.90, 0.70)
filename = VTK_DATA_ROOT + "/Data/mni-surface-mesh.obj"
asciiReader = vtk.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 = vtk.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 = vtk.vtkStripper()
stripper.SetInputConnection(removeNormals.GetOutputPort())
# test binary writing and reading for polygons
binaryWriter = vtk.vtkMNIObjectWriter()
binaryWriter.SetInputConnection(stripper.GetOutputPort())
binaryWriter.SetFileName("mni-surface-mesh-binary.obj")
binaryWriter.SetProperty(property0)
binaryWriter.SetFileTypeToBinary()
binaryWriter.Write()
binaryReader = vtk.vtkMNIObjectReader()
binaryReader.SetFileName("mni-surface-mesh-binary.obj")
property2 = binaryReader.GetProperty()
# make a polyline object with color scalars
scalars = vtk.vtkCurvatures()
scalars.SetInputConnection(asciiReader.GetOutputPort())
colors = vtk.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 = vtk.vtkDataSetMapper()
mapper.SetLookupTable(colors)
mapper.UseLookupTableScalarRangeOn()
edges = vtk.vtkExtractEdges()
edges.SetInputConnection(scalars.GetOutputPort())
# test ascii writing and reading for lines
lineWriter = vtk.vtkMNIObjectWriter()
lineWriter.SetMapper(mapper)
# lineWriter SetLookupTable colors
lineWriter.SetInputConnection(edges.GetOutputPort())
lineWriter.SetFileName("mni-wire-mesh-ascii.obj")
lineWriter.Write()
lineReader = vtk.vtkMNIObjectReader()
lineReader.SetFileName("mni-wire-mesh-ascii.obj")
# display all the results
mapper1 = vtk.vtkDataSetMapper()
mapper1.SetInputConnection(asciiReader.GetOutputPort())
mapper2 = vtk.vtkDataSetMapper()
mapper2.SetInputConnection(binaryReader.GetOutputPort())
mapper3 = vtk.vtkDataSetMapper()
mapper3.SetInputConnection(lineReader.GetOutputPort())
actor1 = vtk.vtkActor()
actor1.SetMapper(mapper1)
actor1.SetProperty(property1)
actor2 = vtk.vtkActor()
actor2.SetMapper(mapper2)
actor2.SetProperty(property2)
actor3 = vtk.vtkActor()
actor3.SetMapper(mapper3)
ren1.AddActor(actor1)
ren2.AddActor(actor2)
ren3.AddActor(actor3)
iren = vtk.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."
|
