VtkRenderWindowInteractor 未启动并导致程序冻结 [java]

Question

我最近在我的 VTK Java 程序中实现了剪辑。我使用 BoxWidget 来控制应该剪裁的内容。但是，我遇到了附加到 BoxWidget 的 vtkRenderWindowInteractor 的问题。程序在 renderWindowInteractor.Start() 语句处冻结（我已经在我的代码中注明了）。

这是我重新模拟的代码：

import java.awt.BorderLayout;
import java.awt.Dimension;
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
import vtk.*;

public class VTKWindowInteractor extends JPanel {

    static {
        if (!vtkNativeLibrary.LoadAllNativeLibraries()) {
            for (vtkNativeLibrary lib : vtkNativeLibrary.values()) {
                if (!lib.IsLoaded()) {
                    System.out.println(lib.GetLibraryName() + " not loaded");
                }
            }
            System.out.println("Make sure the search path is correct: ");
            System.out.println(System.getProperty("java.library.path"));
        }
        vtkNativeLibrary.DisableOutputWindow(null);
    }

    private vtkPanel renWin;
    private vtkRenderWindowInteractor renderWindowInteractor;
    private vtkPolyDataMapper mapper;
    private vtkActor coneActor;
    private vtkPlanes planes;
    private vtkBoxWidget boxWidget;

    public VTKWindowInteractor() {
        setLayout(new BorderLayout());
        renWin = new vtkPanel();
        add(renWin, BorderLayout.CENTER);
        renWin.setMinimumSize(new Dimension(50, 50));
        renWin.GetRenderer().SetBackground(0, 0, 0); // black
        renWin.GetRenderWindow().AddRenderer(renWin.GetRenderer());
    }

    public void render() {

        mapper = new vtkPolyDataMapper();
        vtkConeSource cone = new vtkConeSource();
        cone.SetHeight(3.0);
        cone.SetRadius(1.0);
        cone.SetResolution(10);

        mapper.SetInputConnection(cone.GetOutputPort());
        coneActor = new vtkActor();
        coneActor.SetMapper(mapper);

        renWin.GetRenderer().AddActor(coneActor);

        planes = new vtkPlanes();
        renderWindowInteractor = new vtkRenderWindowInteractor();
        renderWindowInteractor.SetRenderWindow(renWin.GetRenderWindow());
        boxWidget = new vtkBoxWidget();
        boxWidget.SetInteractor(renderWindowInteractor);
        boxWidget.SetPlaceFactor(1.25);
        boxWidget.PlaceWidget(coneActor.GetBounds());
        boxWidget.AddObserver("InteractionEvent", this, "executeClipping");
        renderWindowInteractor.Initialize();
        boxWidget.On();
        renWin.Render();
        renWin.resetCamera();
        /**************************************/
        // This is where the freeze come from //
        //                                   //
        /************************************/
        renderWindowInteractor.Start(); // if i comment out this line, the program works but the boxWidget cannot be resized or rescale or moved
    }

    public void executeClipping() {
        planes = new vtkPlanes();
        boxWidget.GetPlanes(planes);
        mapper.SetClippingPlanes(planes);
        planes.Delete();
    }

    public static final int WINDOW_WIDTH = 1000;
    public static final int WINDOW_HEIGHT = 500;

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                VTKWindowInteractor _vtkRendererPanel = new VTKWindowInteractor();

                JFrame frame = new JFrame();
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.setTitle("......");
                frame.setSize(WINDOW_WIDTH, WINDOW_HEIGHT);
                frame.setVisible(true);
                frame.setLayout(new BorderLayout());
                frame.add(_vtkRendererPanel);
                _vtkRendererPanel.render();
            }
        });
    }
}

几个小时以来，我一直在寻找自己的错误并且感到沮丧，因此来这里寻求帮助。如果有人遇到过这种情况或知道我做错了什么，请纠正我。谢谢！！！

VTK 版本：6.2.0

Answer 1

好的。我终于解决了这个问题。以下引自vtkPanel.java

/* *
* Java AWT component that encapsulate vtkRenderWindow, vtkRenderer, vtkCamera,
* vtkLight.
*
* If a vtkInteractor is needed, use vtkCanvas instead. This is necessary when
* Widget and Picker are used.
*
* @author Kitware */

所以我改变了我的

vtkPanel

到

vtkCanvas

&

renderWindowInteractor = new vtkRenderWindowInteractor();

至

renderWindowInteractor = renWin.getRenderWindowInteractor(); 它解决了问题。

谢谢，这是给将来会遇到与我类似问题的任何人的。

VtkRenderWindowInteractor 未启动并导致程序冻结 [java]

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