vtk中vtkanglewidget 怎么在vtkImageViewer2显示

要在vtkImageViewer2中显示vtkAngleWidget，可以按照以下步骤进行操作：

1.创建vtkAngleWidget对象并将其添加到vtkRenderWindowInteractor中，代码如下：

angleWidget = vtk.vtkAngleWidget()
angleWidget.SetInteractor(renderWindowInteractor)
angleWidget.CreateDefaultRepresentation()

2.将vtkAngleWidget的Representation添加到vtkRenderer中，代码如下：

renderer.AddViewProp(angleWidget.GetRepresentation())

3.将vtkAngleWidget的Observer添加到vtkImageViewer2中，代码如下：

viewer.AddObserver(vtk.vtkCommand.EndInteractionEvent, angleWidget.EndInteractionEvent)

完整代码如下：

import vtk

# 创建vtkImageViewer2对象
viewer = vtk.vtkImageViewer2()
viewer.SetInputConnection(reader.GetOutputPort())
# 创建vtkRenderWindowInteractor对象
renderWindowInteractor = vtk.vtkRenderWindowInteractor()
viewer.SetupInteractor(renderWindowInteractor)

# 创建vtkAngleWidget对象并将其添加到vtkRenderWindowInteractor中
angleWidget = vtk.vtkAngleWidget()
angleWidget.SetInteractor(renderWindowInteractor)
angleWidget.CreateDefaultRepresentation()

# 将vtkAngleWidget的Representation添加到vtkRenderer中
renderer = viewer.GetRenderer()
renderer.AddViewProp(angleWidget.GetRepresentation())

# 将vtkAngleWidget的Observer添加到vtkImageViewer2中
viewer.AddObserver(vtk.vtkCommand.EndInteractionEvent, angleWidget.EndInteractionEvent)

# 启动交互式窗口
renderWindowInteractor.Initialize()
renderWindowInteractor.Start()