How to limit framerate when using Android's GLSurfaceView.RENDERMODE_CONTINUOUSLY?

Question

I have a C++ game running through JNI in Android. The frame rate varies from about 20-45fps due to scene complexity. Anything above 30fps is silly for the game; it\'s just b

Answer 1

The solution from Mark is almost good, but not entirely correct. The problem is that the swap itself takes a considerable amount of time (especially if the video driver is caching instructions). Therefore you have to take that into account or you'll end with a lower frame rate than desired. So the thing should be:

somewhere at the start (like the constructor):

startTime = System.currentTimeMillis();

then in the render loop:

public void onDrawFrame(GL10 gl)
{    
    endTime = System.currentTimeMillis();
    dt = endTime - startTime;
    if (dt < 33)
        Thread.Sleep(33 - dt);
    startTime = System.currentTimeMillis();

    UpdateGame(dt);
    RenderGame(gl);
}

This way you will take into account the time it takes to swap the buffers and the time to draw the frame.