Taking the Development Ahead - Learn OpenGL ES: For Mobile Game and Graphics Development - page 251

GLES20Renderer._zAngle = GLES20Renderer._zAngle -
360;
}
if(GLES20Renderer._zAngle <= -360) {
GLES20Renderer._zAngle = GLES20Renderer._zAngle +
360;
}
updateModel(Counter.getUpDownValue(),
GLES20Renderer._zAngle);
if(GLES20Renderer._missiles.size() > 0) {
initMissiles();
}
renderModel(gl);
endTime = SystemClock.uptimeMillis() % 1000;
deltaTime = Math.abs(endTime - startTime);
if (deltaTime < 20) {
try {
Thread.sleep(20 - deltaTime);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}