Question

是否可以在屏幕上同时显示多个渲染？就像将一个Android屏幕拆分为4个象限，并在每个象限上显示一个立方体？我认为它可能是OpenGL，但那是GLUT并且是基于Windows的。我正在研究如何为Android做这件事，但我还没有看到任何描述它的东西。这是我创建渲染的主要活动。

public class MainActivity extends Activity
{

    private MyGLSurfaceView mGLView;

    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);

        // Create a GLSurfaceView instance and set it
        // as the ContentView for this Activity

        // "this" is the reference to activity
        mGLView = new MyGLSurfaceView(this);
        setContentView(mGLView);
    }

    @Override
    protected void onPause()
    {
        super.onPause();
        // The following call pauses the rendering thread.
        // If your OpenGL application is memory intensive,
        // you should consider de-allocating objects that
        // consume significant memory here.
        mGLView.onPause();
    }

    @Override
    protected void onResume()
    {
        super.onResume();
        // The following call resumes a paused rendering thread.
        // If you de-allocated graphic objects for onPause()
        // this is a good place to re-allocate them.
        mGLView.onResume();
    }
}

class MyGLSurfaceView extends GLSurfaceView
{

    private final MyGLRenderer mRenderer;
    Context context;

    public MyGLSurfaceView(Context context)
    {
        super(context);

        this.context = context;
        // Create an OpenGL ES 2.0 context.
        setEGLContextClientVersion(2);

        // Set the Renderer for drawing on the GLSurfaceView
        Log.d("Test", "GL initialized");
        mRenderer = new MyGLRenderer(context);
        setRenderer(mRenderer);

        // Render the view only when there is a change in the drawing data
        setRenderMode(GLSurfaceView.RENDERMODE_WHEN_DIRTY);
    }
}

Answer 1

我不明白为什么你不能用一个GLSurfaceView做到这一点。您可以通过调用glViewport将屏幕分成四个象限，将场景映射到该象限。然后，您可以调用绘图函数，然后对每个后续象限重复。

示例：

glViewport(0, 0, width/2, height/2);
< render first quadrant >

glViewport(width / 2, 0, width / 2, height / 2);
< render second quadrant >

等等......

Answer 2

GLSurfaceView不是为此而设计的，但您可以使用TextureViews来实现。查看TextureView的在线文档。最简单的方法是创建一个单独的线程，依次呈现每个TextureView。如果你想要同时运行多个OpenGL ES上下文，那就复杂得多，但最近在Khronos.org OpenGL ES论坛上讨论过它。

多个OpenGL ES 2 Android渲染

2 个答案: