java - Java3D 改变形状的颜色

Question

我只是想将用 Java3D 创建的圆柱体的颜色更改为黄色，而不是标准的灰色/黑色。我的代码似乎是正确的，但形状始终保持黑色，如下:

protected BranchGroup createSphere(/*Color color*/) {
        BranchGroup bg = new BranchGroup();
        bg.setCapability(BranchGroup.ALLOW_DETACH);

        Appearance app = new Appearance();
        Color3f color = new Color3f(Color.yellow);
        Color3f black = new Color3f(0.0f, 0.0f, 0.0f);
        Color3f white = new Color3f(1.0f, 1.0f, 1.0f);

        app.setMaterial(new Material(color, black, color, white, 70f));

        bg.addChild(new com.sun.j3d.utils.geometry.Cylinder());
        bg.setUserData("Sphere");
        return bg;
    }

Answer 1

你永远不会将你的外观应用到圆柱体上

Cylinder myCylinder = new com.sun.j3d.utils.geometry.Cylinder();
myCylinder.setAppearance(app);
bg.addChild(myCylinder);