Question

我想控制GLSurfaceView.Renderer的渲染率。我在类中实现了一个扩展GLSurfaceView的线程，并在一个while（true）循环中定期进入睡眠状态，这对于减慢渲染器没有任何作用。有一个很好的答案here建议使用Renderer.onDrawFrame（）方法中的Thread.sleep将GL线程置于睡眠状态。我想在Renderer课外面处理它。当显式调用需要传入GL10对象时，如何才能完成？感谢。

Answer 1

不要扩展GLSurfaceView。如果您还没有，请将渲染器保留为活动类中的变量：

public class MyActivity extends Activity {

    protected GLSurfaceView mGLView;
    protected GraphicsRenderer graphicsRenderer; // keep reference to renderer

    protected void initGraphics() {

        graphicsRenderer = new GraphicsRenderer(this);

        mGLView = (GLSurfaceView) findViewById(R.id.graphics_glsurfaceview1);
        mGLView.setEGLConfigChooser(true);         
        mGLView.setRenderer(graphicsRenderer);

        graphicsRenderer.setFrameRate(30);


    }
}

然后，您可以在渲染器中创建一个方法来控制帧速率：

public class GraphicsRenderer  implements GLSurfaceView.Renderer {

    private long framesPerSecond;
    private long frameInterval; // the time it should take 1 frame to render
    private final long millisecondsInSecond = 1000;

    public void setFrameRate(long fps){

        framesPerSecond = fps;

        frameInterval= millisecondsInSeconds / framesPerSecond;

    }


    public void onDrawFrame(GL10 gl) {

        // get the time at the start of the frame
        long time = System.currentTimeMillis();

        // drawing code goes here

        // get the time taken to render the frame       
        long time2 = System.currentTimeMillis() - time;

        // if time elapsed is less than the frame interval
        if(time2 < frameInterval){          
            try {
                // sleep the thread for the remaining time until the interval has elapsed
                Thread.sleep(frameInterval - time2);
            } catch (InterruptedException e) {
                // Thread error
                e.printStackTrace();
            }
        } else {
            // framerate is slower than desired
        }
    }

}

Android - 在OnDrawFrame方法之外将GLSurfaceView.Renderer置于休眠状态（如在Thread.sleep（20）中）

1 个答案: