为什么我不能将我的G3DB模型加载到我的libgdx游戏中？

Question

我一直在尝试加载我在LibGDX游戏中制作的3D模型。我已经遵循了许多不同的教程，但我一直收到同样的错误：Exception in thread "LWJGL Application" com.badlogic.gdx.utils.GdxRuntimeException: java.lang.IndexOutOfBoundsException这似乎源于if(loading && assets.update())

行

这是我的代码：

public class Game extends ApplicationAdapter {
    private PerspectiveCamera camera;
    private ModelBatch modelBatch;
    private Environment environment;
    private AssetManager assets;
    private boolean loading;
    private Array<ModelInstance> instances = new Array<ModelInstance>();

    @Override
    public void create () {

        modelBatch = new ModelBatch();
        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));

        camera = new PerspectiveCamera(67, Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
        camera.position.set(1f, 1f, 1f);
        camera.lookAt(0,0,0);
        camera.near = 1f;
        camera.far = 300f;
        camera.update();


        assets = new AssetManager();
        assets.load("assets/obj/tablegame.g3db", Model.class);
        loading = true;

    }

    private void doneLoading(){
        Model table = assets.get("assets/obj/tablegame.g3db", Model.class);
        ModelInstance tableInst = new ModelInstance(table);
        instances.add(tableInst);
        loading = false;
    }
    @Override
    public void render () {
        if (loading && assets.update())
            doneLoading();

        Gdx.gl.glViewport(0, 0, Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
        Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT | GL20.GL_DEPTH_BUFFER_BIT);

        modelBatch.begin(camera);
        modelBatch.render(instances, environment);
        modelBatch.end();
    }

    @Override
    public void dispose () {
        modelBatch.dispose();
        instances.clear();
        assets.dispose();;
    }
}

这是完整的错误字符串：

Exception in thread "LWJGL Application" com.badlogic.gdx.utils.GdxRuntimeException: java.lang.IndexOutOfBoundsException
    at com.badlogic.gdx.assets.AssetManager.handleTaskError(AssetManager.java:579)
    at com.badlogic.gdx.assets.AssetManager.update(AssetManager.java:380)
    at csgo.casino.game.Game.render(Game.java:65)
    at com.badlogic.gdx.backends.lwjgl.LwjglApplication.mainLoop(LwjglApplication.java:225)
    at com.badlogic.gdx.backends.lwjgl.LwjglApplication$1.run(LwjglApplication.java:126)
Caused by: java.lang.IndexOutOfBoundsException
    at java.nio.Buffer.checkIndex(Buffer.java:540)
    at java.nio.DirectFloatBufferU.get(DirectFloatBufferU.java:253)
    at com.badlogic.gdx.graphics.Mesh.extendBoundingBox(Mesh.java:668)
    at com.badlogic.gdx.graphics.Mesh.extendBoundingBox(Mesh.java:605)
    at com.badlogic.gdx.graphics.Mesh.calculateBoundingBox(Mesh.java:587)
    at com.badlogic.gdx.graphics.g3d.model.MeshPart.update(MeshPart.java:124)
    at com.badlogic.gdx.graphics.g3d.Model.convertMesh(Model.java:263)
    at com.badlogic.gdx.graphics.g3d.Model.loadMeshes(Model.java:231)
    at com.badlogic.gdx.graphics.g3d.Model.load(Model.java:106)
    at com.badlogic.gdx.graphics.g3d.Model.<init>(Model.java:102)
    at com.badlogic.gdx.assets.loaders.ModelLoader.loadSync(ModelLoader.java:114)
    at com.badlogic.gdx.assets.loaders.ModelLoader.loadSync(ModelLoader.java:35)
    at com.badlogic.gdx.assets.AssetLoadingTask.handleAsyncLoader(AssetLoadingTask.java:141)
    at com.badlogic.gdx.assets.AssetLoadingTask.update(AssetLoadingTask.java:90)
    at com.badlogic.gdx.assets.AssetManager.updateTask(AssetManager.java:504)
    at com.badlogic.gdx.assets.AssetManager.update(AssetManager.java:378)
    ... 3 more

有什么想法吗？