Android LibGDX。不渲染网格构建器模型

Question

我有一个可在桌面上运行100％的Lib Gdx游戏但是当我在Android上运行它时，运行时生成的背景网格不会渲染。

或者至少纹理没有显示在它们上面。

任何想法都是适当的！

相关代码：

ModelBuilder r;

this.r.begin();


    MeshPartBuilder meshBuilder = r.part("1", GL20.GL_TRIANGLES, Usage.Position | Usage.Normal | Usage.TextureCoordinates,new Material(TextureAttribute.createDiffuse((new Texture(l.get("letolt.png",Pixmap.class))))));
    meshBuilder.patch(-100f, -120f, -100f, -100f, -120f, 100f, 100f, -120f, 100f, 99.999f, -119.12f, -99f,0f,2f,0.1f ,2,2);

    MeshPartBuilder meshBuilder1 = r.part(" ", GL20.GL_TRIANGLES, Usage.Position | Usage.Normal | Usage.TextureCoordinates,new Material(TextureAttribute.createDiffuse((l.get("bge.png",Texture.class/* .class*/)))));
    meshBuilder1.patch(-100f, -1f, -100f, -100f, -1f, 100f, 100f, -1f, 100f, 99.9999f, -0.98f, -99f,0f,2f,0.1f ,1,1);

    meshBuilder1.patch(-100f, -3f, -100f, -100f, -3f, 100f, 100f, -3f, 100f, 99.999f, -3.999f, -99f,0f,2f,0.1f ,1,1);


    backgroun = new ModelInstance(this.r.end());

    backgroun.transform.scl(100,50,100);

    backgroun.materials.get(0).set(new BlendingAttribute(0.99f));
    backgroun.materials.get(1).set(new BlendingAttribute(0.22f));
(backgroun.materials.get(0).get(TextureAttribute.Diffuse))).textureDescription.uWrap=TextureWrap.Repeat;
    ((TextureAttribute)(backgroun.materials.get(0).get(TextureAttribute.Diffuse))).textureDescription.vWrap=TextureWrap.Repeat;
    ((TextureAttribute)(backgroun.materials.get(0).get(TextureAttribute.Diffuse))).scaleU = 2;

    ((TextureAttribute)(backgroun.materials.get(0).get(TextureAttribute.Diffuse))).scaleV = 2;

    ((TextureAttribute)(backgroun.materials.get(1).get(TextureAttribute.Diffuse))).scaleU = 100;
    ((TextureAttribute)(backgroun.materials.get(1).get(TextureAttribute.Diffuse))).scaleV = 100;