title: opengl antialiasing
body: <p>How do you do antialiasing in opengl?</p>
  
  <p>I guess the answer is "use multisampling", but i'm not sure how to implement it.</p>
  
  <p>i would like to do the antialiasing in the 'standard' and not almost-deprecated way, if there is one.</p>
  
  <p>I'm using Qt library for making the window.</p>