java-绘制网格和纹理libgdx

概述privateMeshmesh;privateTexturetexture;privateSpriteBatchbatch;@Overridepublicvoidcreate(){if(mesh==null){mesh=newMesh(true,3,3,newVertexAttribute(Usage.Position,3,"a_position"));

  private Mesh mesh;  private Texture texture;  private SpriteBatch batch;  @OverrIDe  public voID create() {    if (mesh == null) {      mesh = new Mesh(true, 3, 3, new VertexAttribute(Usage.position, 3,          "a_position"));      mesh.setVertices(new float[] { -0.5f, -0.5f, 0,           0.5f, -0.5f, 0,           0, 0.5f, 0 });      mesh.setIndices(new short[] { 0, 1, 2 });      texture = new Texture(Gdx.files.internal("data/circle.png"));      batch = new SpriteBatch();    }  }  @OverrIDe  public voID render() {    Gdx.gl.glClear(GL10.GL_color_BUFFER_BIT);    batch.begin();    mesh.render(GL10.GL_TRIANGLES, 0, 3);    batch.draw(texture, 10, 10);    batch.end();  }

我正在尝试使用libgdx在屏幕上绘制一个三角形和一个圆形(从png).

运行此命令时,我只能在屏幕上看到“纹理”(圆形).为了使“网格”和“纹理”都可见,该怎么办？

解决方法:

SpriteBatch使用正交投影矩阵.当您调用batch.begin()时,它将应用其矩阵(请参见SpriteBatch.setupMatrices().

所以：

>更改网格的顶点,因此它在屏幕上：

mesh.setVertices(new float[] { 100f, 100f, 0,           400f, 100f, 0,           250, 400f, 0 });

>将网格的渲染移出批处理渲染：

Gdx.gl10.glMatrixMode(GL10.GL_PROJECTION);Gdx.gl10.glLoadIDentity();Gdx.gl10.glMatrixMode(GL10.GL_MODELVIEW);Gdx.gl10.glLoadIDentity();mesh.render(GL10.GL_TRIANGLES, 0, 3);batch.begin();batch.draw(texture, 10, 10);batch.end();

您必须在begin()中重置按批次设置的投影和变换矩阵；因为SpriteBatch.end()不会重新设置矩阵.

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