.net Winform 下使用VTK 选中模型高亮显示

.net Winform 下使用VTK 选中、拖动模型
导入Nuget包
创建.net Framwork 4.8 的Winform窗体应用程序，导入 Activiz.NET 5.8.0版本。

C#版的VTK鼠标交互事件的实现方法网上是真不好找，结合AI给出的代码示例，总算找到一个可以实现鼠标选中单元后变色的方法，代码如下

public partial class Main : Form
{
	private RenderWindowControl renderWindow;
	private vtkRenderWindow vtkRenderWindow;
	private vtkCellPicker cellPicker;
	private vtkRenderWindowInteractor renderWindowInteractor;
	private vtkActor selectdActor;
	
	public Main()
	{
	    InitializeComponent();
	    InitRendWindow();
	    CreateCubes();
	}
	
	private void InitRendWindow()
	{
		renderWindow = new RenderWindowControl();
		renderWindow.Load += RenderWinow_Load;
		renderWindow.Dock = DockStyle.Fill;
		panel1.Controls.Add(renderWindow);
	}
	
	public vtkRenderer GetVtkRenderer()
	{
	    vtkRenderer Renderer = renderWindow.RenderWindow.GetRenderers().GetFirstRenderer();
	    return Renderer;
	}
	
	private void RenderWinow_Load(object sender, EventArgs e)
	{
		vtkRenderWindow = renderWindow.RenderWindow;
		var style = vtkInteractorStyleTrackballCamera.New();
		//之前我把事件加在了style上，后来发现这样不好，因为指定了style的LeftButtonPressEvt事件后，其他默认的旋转、平移也都用不了了
		renderWindowInteractor.LeftButtonPressEvt += new vtkObject.vtkObjectEventHandler(Interactor_LeftButtonDownEvt);
renderWindowInteractor.SetInteractorStyle(style);
		renderWindowInteractor.Start();
	}

	private void Interactor_LeftButtonDownEvt(vtkObject sender, vtkObjectEventArgs e)
	{
		if (e.EventId == (uint)vtkCommand.EventIds.LeftButtonPressEvent)
		{
		    var interactorCamera = sender as vtkInteractorStyleTrackballCamera;
		    var interactor32 = sender as vtkWin32RenderWindowInteractor;
		    winSize = vtkRenderWindow.GetSize();
		    if (interactor32 != null)
		    {
		        //var interactor = interactorCamera.GetInteractor();
		
		        var positions = interactor32.GetEventPosition();
		        var renderer = interactor32.GetRenderWindow().GetRenderers().GetFirstRenderer();
		        HandlePick(positions, renderer);
		        vtkRenderWindow.Render();
		    }
		}
	}
	
	private void HandlePick(int[] eventPositions, vtkRenderer renderer)
	{
	    renderer.SetDisplayPoint(eventPositions[0], eventPositions[1], 0);
	    renderer.DisplayToWorld();
	    var wordPoints = renderer.GetWorldPoint();
	    var picker = vtkCellPicker.New();
	    picker.SetTolerance(0.0005);
	    picker.Pick(eventPositions[0], eventPositions[1], 0.0, renderer);
	
	    vtkAssemblyPath path = picker.GetPath();
	    if (path != null && path.GetNumberOfItems() > 0)
	    {
	        vtkProp3D prop = path.GetFirstNode().GetViewProp() as vtkProp3D;
	        if (prop != null)
	        {
	            // Handle selection - for example, change color
	            vtkActor actor = prop as vtkActor;
	            if (actor != null)
	            {
	                //初始化时
	                if (selectdActor == null)
	                {
	                    actor.GetProperty().SetColor(1, 0, 0);
	                }
	                else
	                {
	                    if (selectdActor == actor)
	                    {
	                        if (selectdActor.GetProperty().GetColor() != actor.GetProperty().GetColor())
	                        {
	                            var color = actor.GetProperty().GetColor();
	                            var oldColor = new double[] { 0.5, 1, 0 };
	                            if (color.SequenceEqual(oldColor))
	                            {
	                                actor.GetProperty().SetColor(1, 0, 0);
	                            }
	                            else
	                            {
	                                actor.GetProperty().SetColor(0.5, 1, 0);
	                            }
	                        }
	                    }
	                    else
	                    {
	                        selectdActor.GetProperty().SetColor(0.5, 1, 0);
	                        actor.GetProperty().SetColor(1, 0, 0);
	                    }
	                }
	                selectdActor = actor;
	            }
	        }
	    }
	    renderer.Render();
	}

	private void CreateCubes()
	{	
		var renderer = GetVtkRenderer();
		for (int i = 0; i < 4; i++)
		{
		    for (int j = 0; j < 2; j++)
		    {
		        for (int k = 0; k < 2; k++)
		        {
		            CreateAndAddCube(i * 2, j * 2, k * 2, renderer);
		        }
		    }
		}
		renderer.ResetCamera();
		vtkRenderWindow.Render();
	}
	
	 private void CreateAndAddCube(double x, double y, double z, vtkRenderer renderer)
	 {
	     // 创建正方体几何
	     vtkCubeSource cubeSource = vtkCubeSource.New();
	     cubeSource.SetCenter(x + 1, y + 1, z + 1); // 设置中心位置（每个正方体的中心）
	     cubeSource.SetXLength(2.0);
	     cubeSource.SetYLength(2.0);
	     cubeSource.SetZLength(2.0);
	
	     // 创建映射器
	     vtkPolyDataMapper mapper = vtkPolyDataMapper.New();
	     mapper.SetInputConnection(cubeSource.GetOutputPort());
	
	     // 创建演员并设置颜色（可选）
	     vtkActor actor = vtkActor.New();
	     actor.SetMapper(mapper);
	     // actor.GetProperty().SetColor(...); // 设置颜色
	     actor.GetProperty().SetColor(0.5, 1, 0);
	     actor.GetProperty().SetOpacity(1); // 设置为不透明
	                                        //actor.GetProperty().SetRepresentationToWireframe(); // 设置为线框模式
	     actor.GetProperty().EdgeVisibilityOn(); // 开启边缘可见性
	     // 添加演员到渲染器
	     renderer.AddActor(actor);
	 }

	
}