java - 3D对象在libGDX中相互透视

Question

我正在研究一个 3D 模拟，模拟在其中有物体穿越太空。呈现的 3D 对象似乎是“透明的”:

球体大小相同。大的在前面。模型颜色未设置为透明。我假设渲染顺序可能会导致它(如在 2D 中)，并使对象具有可比性并在渲染之前对它们进行排序。那并没有解决问题。

代码如下:

 public void render(float delta) {
        Gdx.gl.glViewport(0, 0, Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
        Gdx.gl20.glClear(GL20.GL_COLOR_BUFFER_BIT | GL20.GL_DEPTH_BUFFER_BIT);
        //We clear the screen
        camera.update();
        this._game_.modelBatch.begin(camera);
        ModelInstance inst;
        Orb closestOrb = null;
        float minDistance = Float.MAX_VALUE;
        for ( Orb orb : this._game_.orbsList)
        {
            if (orb.getZ()< _game_.player.getPosition().z)
            {
            inst = new ModelInstance(this._game_.orbModel);
                inst.transform.setToTranslation(orb.getX(),orb.getY(),orb.getZ());
            this._game_.modelBatch.render(inst, this._game_.environment);
            if (minDistance > Physics.getDistacne(_game_.player.getPosition(),orb.getPosition()))
                {
                    minDistance = Physics.getDistacne(_game_.player.getPosition(), orb.getPosition());
                    closestOrb = orb;
                }
            }
        }
        this._game_.modelBatch.end();

这是模型在游戏中的代码:

        modelBatch = new ModelBatch();//the screen uses this
        modelBuilder  = new ModelBuilder();
        Material orbMaterial = new Material(ColorAttribute.createDiffuse(0.5f, 0.5f, 1f,1f));
        //createDiffuse(Color.MAGENTA));
        long orbAttributes =  Usage.Position | Usage.Normal;
        orbModel = modelBuilder.createSphere(Orb.STANDARD_ORB_SIZE,Orb.STANDARD_ORB_SIZE, Orb.STANDARD_ORB_SIZE,30,30, orbMaterial, orbAttributes);
environment = new Environment();
            environment.set(new ColorAttribute(ColorAttribute.AmbientLight, 0.4f, 0.4f, 0.4f, 1f));
            environment.add(new DirectionalLight().set(0.8f, 0.8f, 0.8f, -1f, -0.8f, -0.2f));

            orbsList = new ArrayList<Orb>(); 
            for (int i = 0; i < SimGame.NUM_OF_ORBS; i++)
            {
                Orb orb = Orb.generateOrb(-SimGame.WORLD_SIZE,SimGame.WORLD_SIZE, Orb.STANDARD_ORB_SIZE);
                orbsList.add(orb);

            }
            Collections.sort(orbsList);

Answer 1

问题是 zNear 因子设置为 0。这导致深度缓冲功能异常。你可以在这里阅读更多关于他的信息:http://www.opengl.org/archives/resources/faq/technical/depthbuffer.htm我感谢所有为我指出正确方向的人。