Canvas3D 未出现在 Swing 窗口中

发布于 2024-07-07 14:59:32 字数 494 浏览 5 评论 0原文

我试图在 Swing JPanel 中插入 Canvas3D 对象，但代码似乎不起作用（即什么也没有发生）：

        Canvas3D canvas = new Canvas3D(SimpleUniverse.getPreferredConfiguration());
        SimpleUniverse universe = new SimpleUniverse(canvas);
        BranchGroup root = new BranchGroup();
        root.addChild(new ColorCube());
        universe.addBranchGraph(root);
        universe.getViewingPlatform().setNominalViewingTransform();
        canvasPanel.add(canvas);

我缺少什么？ JPanel 是使用 NetBean 的可视化编辑器创建的。

原文

I am attempting to insert a Canvas3D object inside a Swing JPanel, but the code doesn't seem to be working (i.e. nothing happens):

        Canvas3D canvas = new Canvas3D(SimpleUniverse.getPreferredConfiguration());
        SimpleUniverse universe = new SimpleUniverse(canvas);
        BranchGroup root = new BranchGroup();
        root.addChild(new ColorCube());
        universe.addBranchGraph(root);
        universe.getViewingPlatform().setNominalViewingTransform();
        canvasPanel.add(canvas);

What am I missing? The JPanel was created using NetBean's Visual Editor.

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空城旧梦 2024-07-14 14:59:32

可能您必须在面板上设置一个布局管理器，它会自动将子组件扩展到整个区域。 JPanel 默认情况下有一个 FlowLayout，它不会展开子组件。您可以通过调用以下方式尝试使用 BorderLayout：

canvasPanel.setLayout(new BorderLayout());

Probably you have to set a layout manager on the panel, which automatically expands the child components to the full area. A JPanel has a FlowLayout by default, which does not expand the child components. You could try a BorderLayout instead by calling:

canvasPanel.setLayout(new BorderLayout());

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请持续率性 2024-07-14 14:59:32

Canvas3D 需要传递给它的尺寸；从 SimpleUniverse 设置首选配置是不够的。就我而言，这意味着这段代码：

        // 3D canvas initialization
        Canvas3D canvas = new Canvas3D(SimpleUniverse.getPreferredConfiguration());
        SimpleUniverse universe = new SimpleUniverse(canvas);
        BranchGroup root = new BranchGroup();
        root.addChild(new ColorCube());
        universe.addBranchGraph(root);
        universe.getViewingPlatform().setNominalViewingTransform();
        canvas.setSize(100, 100);
        canvasPanel.add(canvas);

Canvas3D needs a size passed to it; setting the preferred configuration from SimpleUniverse is not enough. In my case, that meant this code:

        // 3D canvas initialization
        Canvas3D canvas = new Canvas3D(SimpleUniverse.getPreferredConfiguration());
        SimpleUniverse universe = new SimpleUniverse(canvas);
        BranchGroup root = new BranchGroup();
        root.addChild(new ColorCube());
        universe.addBranchGraph(root);
        universe.getViewingPlatform().setNominalViewingTransform();
        canvas.setSize(100, 100);
        canvasPanel.add(canvas);

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