File: PickerWithLocator.py

package info (click to toggle)
vtk6 6.3.0%2Bdfsg2-2
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 118,880 kB
  • sloc: cpp: 1,442,792; ansic: 113,395; python: 72,383; tcl: 46,998; xml: 8,119; yacc: 4,525; java: 4,239; perl: 3,108; lex: 1,694; sh: 1,093; asm: 154; makefile: 103; objc: 17
file content (185 lines) | stat: -rwxr-xr-x 4,906 bytes parent folder | download | duplicates (12)
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
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
#!/usr/bin/env python

import vtk
from vtk.util.misc import vtkGetDataRoot
VTK_DATA_ROOT = vtkGetDataRoot()


#
# Do picking with a locator to speed things up
#

# renderer and interactor
ren = vtk.vtkRenderer()

renWin = vtk.vtkRenderWindow()
renWin.AddRenderer(ren)

iren = vtk.vtkRenderWindowInteractor()
iren.SetRenderWindow(renWin)

# read the volume
v16 = vtk.vtkVolume16Reader()
v16.SetDataDimensions(64, 64)
v16.SetImageRange(1, 93)
v16.SetDataByteOrderToLittleEndian()
v16.SetFilePrefix(VTK_DATA_ROOT + '/Data/headsq/quarter')
v16.SetDataSpacing(3.2, 3.2, 1.5)

#---------------------------------------------------------
# Do the surface rendering
boneExtractor = vtk.vtkMarchingCubes()
boneExtractor.SetInputConnection(v16.GetOutputPort())
boneExtractor.SetValue(0, 1150)

boneNormals = vtk.vtkPolyDataNormals()
boneNormals.SetInputConnection(boneExtractor.GetOutputPort())
boneNormals.SetFeatureAngle(60.0)

boneStripper = vtk.vtkStripper()
boneStripper.SetInputConnection(boneNormals.GetOutputPort())
boneStripper.SetMaximumLength(5)

boneLocator = vtk.vtkCellLocator()
boneLocator.SetDataSet(boneStripper.GetOutput())
boneLocator.LazyEvaluationOn()

boneMapper = vtk.vtkPolyDataMapper()
boneMapper.SetInputConnection(boneStripper.GetOutputPort())
boneMapper.ScalarVisibilityOff()

boneProperty = vtk.vtkProperty()
boneProperty.SetColor(1.0, 1.0, 0.9)

bone = vtk.vtkActor()
bone.SetMapper(boneMapper)
bone.SetProperty(boneProperty)

#---------------------------------------------------------
# Create an image actor

table = vtk.vtkLookupTable()
table.SetRange(0, 2000)
table.SetRampToLinear()
table.SetValueRange(0, 1)
table.SetHueRange(0, 0)
table.SetSaturationRange(0, 0)

mapToColors = vtk.vtkImageMapToColors()
mapToColors.SetInputConnection(v16.GetOutputPort())
mapToColors.SetLookupTable(table)

imageActor = vtk.vtkImageActor()
imageActor.GetMapper().SetInputConnection(mapToColors.GetOutputPort())
imageActor.SetDisplayExtent(32, 32, 0, 63, 0, 92)

#---------------------------------------------------------
# make a clipping plane

cx = 100.8
cy = 100.8
cz = 69.0

boneClip = vtk.vtkPlane()
boneClip.SetNormal(0, 1, 0)
boneClip.SetOrigin(cx, cy, cz)

boneMapper.AddClippingPlane(boneClip)

#---------------------------------------------------------
ren.AddViewProp(bone)
ren.AddViewProp(imageActor)

camera = ren.GetActiveCamera()
camera.SetFocalPoint(cx, cy, cz)
camera.SetPosition(cx + 400, cy + 100, cz - 100)
camera.SetViewUp(0, 0, -1)

ren.ResetCameraClippingRange()

renWin.Render()

#---------------------------------------------------------
# the cone should point along the Z axis
coneSource = vtk.vtkConeSource()
coneSource.CappingOn()
coneSource.SetHeight(12)
coneSource.SetRadius(5)
coneSource.SetResolution(31)
coneSource.SetCenter(6, 0, 0)
coneSource.SetDirection(-1, 0, 0)

#---------------------------------------------------------
picker = vtk.vtkCellPicker()
picker.SetTolerance(1e-6)
picker.AddLocator(boneLocator)

# A function to point an actor along a vector n = (nx,ny.nz)
def PointCone(actor, n):
    if n[0] < 0.0:
        actor.RotateWXYZ(180, 0, 1, 0)
        actor.RotateWXYZ(180, (n[0] - 1.0) * 0.5, n[1] * 0.5, n[2] * 0.5)
    else:
        actor.RotateWXYZ(180, (n[0] + 1.0) * 0.5, n[1] * 0.5, n[2] * 0.5)

# Pick the actor
picker.Pick(70, 120, 0, ren)
#print picker
p = picker.GetPickPosition()
n = picker.GetPickNormal()

coneActor1 = vtk.vtkActor()
coneActor1.PickableOff()
coneMapper1 = vtk.vtkDataSetMapper()
coneMapper1.SetInputConnection(coneSource.GetOutputPort())
coneActor1.SetMapper(coneMapper1)
coneActor1.GetProperty().SetColor(1, 0, 0)
coneActor1.SetPosition(p)
PointCone(coneActor1, n)
ren.AddViewProp(coneActor1)

# Pick the image
picker.Pick(170, 220, 0, ren)
#print picker
p = picker.GetPickPosition()
n = picker.GetPickNormal()

coneActor2 = vtk.vtkActor()
coneActor2.PickableOff()
coneMapper2 = vtk.vtkDataSetMapper()
coneMapper2.SetInputConnection(coneSource.GetOutputPort())
coneActor2.SetMapper(coneMapper2)
coneActor2.GetProperty().SetColor(1, 0, 0)
coneActor2.SetPosition(p)
PointCone(coneActor2, n)
ren.AddViewProp(coneActor2)

# Pick the actor again, in a way that the ray gets clipped
picker.Pick(180, 220, 0, ren)
#print picker
p = picker.GetPickPosition()
n = picker.GetPickNormal()

coneActor3 = vtk.vtkActor()
coneActor3.PickableOff()
coneMapper3 = vtk.vtkDataSetMapper()
coneMapper3.SetInputConnection(coneSource.GetOutputPort())
coneActor3.SetMapper(coneMapper3)
coneActor3.GetProperty().SetColor(1, 0, 0)
coneActor3.SetPosition(p)
PointCone(coneActor3, n)
ren.AddViewProp(coneActor3)

ren.ResetCameraClippingRange()

renWin.Render()

#---------------------------------------------------------
# test-related code
def TkCheckAbort (__vtk__temp0=0, __vtk__temp1=0):
    foo = renWin.GetEventPending()
    if (foo != 0):
        renWin.SetAbortRender(1)
        pass

renWin.AddObserver("AbortCheckEvent", TkCheckAbort)