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
|
#!/usr/bin/env python
import vtk
from vtk.test import Testing
from vtk.util.misc import vtkGetDataRoot
VTK_DATA_ROOT = vtkGetDataRoot()
# Simple volume rendering example.
reader = vtk.vtkSLCReader()
reader.SetFileName(VTK_DATA_ROOT + "/Data/sphere.slc")
# Create transfer functions for opacity and color
opacityTransferFunction = vtk.vtkPiecewiseFunction()
opacityTransferFunction.AddPoint(0, 0.0)
opacityTransferFunction.AddPoint(30, 0.0)
opacityTransferFunction.AddPoint(80, 0.5)
opacityTransferFunction.AddPoint(255, 0.5)
colorTransferFunction = vtk.vtkColorTransferFunction()
colorTransferFunction.AddRGBPoint(0.0, 0.0, 0.0, 0.0)
colorTransferFunction.AddRGBPoint(64.0, 1.0, 0.0, 0.0)
colorTransferFunction.AddRGBPoint(128.0, 0.0, 0.0, 1.0)
colorTransferFunction.AddRGBPoint(192.0, 0.0, 1.0, 0.0)
colorTransferFunction.AddRGBPoint(255.0, 0.0, 0.2, 0.0)
# Create properties, mappers, volume actors, and ray cast function
volumeProperty = vtk.vtkVolumeProperty()
volumeProperty.SetColor(colorTransferFunction)
volumeProperty.SetScalarOpacity(opacityTransferFunction)
volumeProperty.SetInterpolationTypeToLinear()
volumeProperty.ShadeOn()
ren1 = vtk.vtkRenderer()
renWin = vtk.vtkRenderWindow()
renWin.AddRenderer(ren1)
renWin.SetSize(300, 300)
iren = vtk.vtkRenderWindowInteractor()
iren.SetRenderWindow(renWin)
renWin.SetMultiSamples(0)
ren1.SetBackground(0.1, 0.2, 0.4)
# Translate the volume to center it at (0,0,0)
userTrans = vtk.vtkTransform()
userTrans.PostMultiply()
userTrans.Identity()
userTrans.Translate(-24.5, -24.5, -24.5)
# Clipping planes are in world coords
plane1 = vtk.vtkPlane()
plane1.SetOrigin(-24, 0, 0)
plane1.SetNormal(1, 0, 0)
plane2 = vtk.vtkPlane()
plane2.SetOrigin(24, 0, 0)
plane2.SetNormal(-1, 0, 0)
plane3 = vtk.vtkPlane()
plane3.SetOrigin(0, -15, 0)
plane3.SetNormal(0.163176, 0.925417, -0.342020)
plane4 = vtk.vtkPlane()
plane4.SetOrigin(0, 24, 0)
plane4.SetNormal(0, -1, 0)
plane5 = vtk.vtkPlane()
plane5.SetOrigin(0, 0, -24)
plane5.SetNormal(0, 0, 1)
plane6 = vtk.vtkPlane()
plane6.SetOrigin(0, 0, 24)
plane6.SetNormal(0, 0, -1)
clippingPlanes = vtk.vtkPlaneCollection()
clippingPlanes.AddItem(plane1)
clippingPlanes.AddItem(plane2)
clippingPlanes.AddItem(plane3)
clippingPlanes.AddItem(plane4)
clippingPlanes.AddItem(plane5)
clippingPlanes.AddItem(plane6)
# Cropping planes are in data coords
volumeMapper1 = vtk.vtkVolumeTextureMapper2D()
volumeMapper1.SetInputConnection(reader.GetOutputPort())
volumeMapper1.CroppingOn()
volumeMapper1.SetCroppingRegionPlanes(16, 33, 16, 33, 16, 33)
volumeMapper1.SetClippingPlanes(clippingPlanes)
volume1 = vtk.vtkVolume()
volume1.SetMapper(volumeMapper1)
volume1.SetProperty(volumeProperty)
outline1 = vtk.vtkVolumeOutlineSource()
outline1.SetVolumeMapper(volumeMapper1)
outline1.GenerateFacesOn()
outline1.GenerateScalarsOn()
preTrans1 = vtk.vtkTransformPolyDataFilter()
preTrans1.SetInputConnection(outline1.GetOutputPort())
preTrans1.SetTransform(userTrans)
outlineClip1 = vtk.vtkClipClosedSurface()
outlineClip1.SetInputConnection(preTrans1.GetOutputPort())
outlineClip1.SetClippingPlanes(clippingPlanes)
outlineClip1.GenerateFacesOff()
outlineClip1.GenerateOutlineOn()
outlineClip1.SetScalarModeToColors()
outlineClip1.SetClipColor(1, 1, 0)
outlineClip1.SetActivePlaneId(2)
outlineClip1.SetActivePlaneColor(0, 1, 0)
postTrans1 = vtk.vtkTransformPolyDataFilter()
postTrans1.SetInputConnection(outlineClip1.GetOutputPort())
postTrans1.SetTransform(userTrans.GetInverse())
outlineMapper1 = vtk.vtkDataSetMapper()
outlineMapper1.SetInputConnection(postTrans1.GetOutputPort())
outlineActor1 = vtk.vtkActor()
outlineActor1.SetMapper(outlineMapper1)
volume1.SetUserTransform(userTrans)
outlineActor1.SetUserTransform(userTrans)
ren1.AddViewProp(outlineActor1)
ren1.AddViewProp(volume1)
volumeMapper1.SetCroppingRegionFlagsToFence()
outline1.GenerateScalarsOn()
ren1.ResetCamera()
ren1.GetActiveCamera().Zoom(1.35)
renWin.Render()
iren.Initialize()
#iren.Start()
|
