title: How to run parallel codes using QT?
body: <p>I am developing a simulator. I have chosen QT for the GUI. My project involves a lot of manipulation of data and I use QT just to plot my results. </p>
  
  <p>My code structure is such that my main function contains a global object of my data, an object of the QT GUI and other objects for manipulating this data. I need to modify this data at every 30 ms. I have also attached a simplified version of my main file.</p>
  
  <p>My problem is that I cannot call functions of my other objects (other than the GUI) before exiting the QT object. I have implemented timers in QT in isolation which plots the new data and works fine. All I want to do is call my ai and phySim object at a particular time interval independant of the QT object. I want these three objects to be completely independent.</p>
  
  <pre><code>world* _world;
  int main(int argc, char *args[])
  
  {
  _world = new world();
  
  
  gui *GUI; ///QT object
  
  ai *AI;//object to manipulate data
  
  phySim *sim;//object to manipulate data
  
  /////////////////////////////////// this gets executed only when i close the QT gui
      AI = new ai(_world); 
  AI-&gt;doSomething();
  
  sim = new phySim(_world);
  sim-&gt;updateWorld();
  //////////////////////////////////////////////////////////////////////////////
  
  QApplication app(argc,args);
  GUI = new gui(_world);  
  GUI-&gt;show();
  
  
  return app.exec();  
  } 
  </code></pre>