VTK获取当前视图模型相机视角，用vb

要获取VTK中当前视图模型的相机视角，可以使用`vtkCamera`类提供的方法和属性。以下是用VB语言实现的示例代码：

Imports Kitware.VTK

Module GetCameraView
    Sub Main()
        ' 创建渲染窗口和渲染器
        Dim renderWindow As vtkRenderWindow = vtkRenderWindow.New()
        Dim renderer As vtkRenderer = vtkRenderer.New()
        renderWindow.AddRenderer(renderer)

        ' 创建一个示例的几何对象（这里以一个立方体为例）
        Dim cubeSource As vtkCubeSource = vtkCubeSource.New()
        Dim mapper As vtkPolyDataMapper = vtkPolyDataMapper.New()
        mapper.SetInputConnection(cubeSource.GetOutputPort())
        Dim actor As vtkActor = vtkActor.New()
        actor.SetMapper(mapper)
        renderer.AddActor(actor)

        ' 设置相机视角
        Dim camera As vtkCamera = renderer.GetActiveCamera()
        camera.SetPosition(0, 0, 5)
        camera.SetFocalPoint(0, 0, 0)
        camera.SetViewUp(0, 1, 0)
        
        ' 获取相机视角参数
        Dim position As Double() = camera.GetPosition()
        Dim focalPoint As Double() = camera.GetFocalPoint()
        Dim viewUp As Double() = camera.GetViewUp()
        
        ' 打印相机视角参数
        Console.WriteLine("Camera Position: {0}, {1}, {2}", position(0), position(1), position(2))
        Console.WriteLine("Camera Focal Point: {0}, {1}, {2}", focalPoint(0), focalPoint(1), focalPoint(2))
        Console.WriteLine("Camera View Up: {0}, {1}, {2}", viewUp(0), viewUp(1), viewUp(2))

        ' 释放资源
        cubeSource.Dispose()
        mapper.Dispose()
        actor.Dispose()
        renderer.Dispose()
        renderWindow.Dispose()
    End Sub
End Module

上述代码示例了如何创建一个渲染窗口、渲染器，并在窗口中添加一个立方体对象。然后使用`vtkCamera`类的方法和属性来设置相机视角，并通过`Get`方法获取相机视角参数。最后，将参数打印出来。

请确保已经正确引用VTK的相关库，并根据实际情况修改示例代码。