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
|
#!/usr/bin/env python
# This example demonstrates the use of vtkVectorText and vtkFollower.
# vtkVectorText is used to create 3D annotation. vtkFollower is used to
# position the 3D text and to ensure that the text always faces the
# renderer's active camera (i.e., the text is always readable).
import vtk
# Create the axes and the associated mapper and actor.
axes = vtk.vtkAxes()
axes.SetOrigin(0, 0, 0)
axesMapper = vtk.vtkPolyDataMapper()
axesMapper.SetInputConnection(axes.GetOutputPort())
axesActor = vtk.vtkActor()
axesActor.SetMapper(axesMapper)
# Create the 3D text and the associated mapper and follower (a type of
# actor). Position the text so it is displayed over the origin of the
# axes.
atext = vtk.vtkVectorText()
atext.SetText("Origin")
textMapper = vtk.vtkPolyDataMapper()
textMapper.SetInputConnection(atext.GetOutputPort())
textActor = vtk.vtkFollower()
textActor.SetMapper(textMapper)
textActor.SetScale(0.2, 0.2, 0.2)
textActor.AddPosition(0, -0.1, 0)
# Create the Renderer, RenderWindow, and RenderWindowInteractor.
ren = vtk.vtkRenderer()
renWin = vtk.vtkRenderWindow()
renWin.AddRenderer(ren)
iren = vtk.vtkRenderWindowInteractor()
iren.SetRenderWindow(renWin)
# Add the actors to the renderer.
ren.AddActor(axesActor)
ren.AddActor(textActor)
# Zoom in closer.
ren.ResetCamera()
ren.GetActiveCamera().Zoom(1.6)
# Reset the clipping range of the camera; set the camera of the
# follower; render.
ren.ResetCameraClippingRange()
textActor.SetCamera(ren.GetActiveCamera())
iren.Initialize()
renWin.Render()
iren.Start()
|
