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copied!<p>A better way to communicate between other threads in your app and your GL thread / renderer is to keep your instance of your renderer to hand in your activity:</p> <pre><code>public class stackoverflowTest extends Activity { GLSurfaceView glSurface; MyRenderer myRenderer; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); glSurface = (GLSurfaceView)findViewById(R.id.glSurfaceView1); myRenderer = new MyRenderer(); glSurface.setRenderer(myRenderer); Square mySquare = new Square(); myRenderer.addSquareToScene(mySquare); } } </code></pre> <p>and then in your renderer</p> <pre><code>public class MyRenderer implements Renderer { private Vector<Square> scene; private Vector<Square> bufferedSquaresToAddToScene @Override public void onDrawFrame(GL10 gl) { while(bufferedSquaresToAddToScene.size()>0){ scene.add(bufferedSquaresToAddToScene.remove(0)); } for(int i = 0;i<scene.size();i++){ scene.get(i).draw(gl); } } public void addSquareToScene(Square square){ bufferedSquaresToAddToScene.add(square); } } </code></pre> <p>To communicate back in the other direction, it is a bit harder for non-UI threads, but to the UI/main thread you can just use <a href="http://developer.android.com/reference/android/os/Handler.html" rel="nofollow">Handler</a></p> <p>And yes, it should be fairly easy to do a hashmap instead of a vector so you don't load in duplicate squares</p> <p><a href="http://www.anddev.org/post107733.html#p107733" rel="nofollow">As for confusion...</a></p>

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