title: Computing FOVX (openGL)
body: <p>When working with openGL perspectives I am not quite sure how to compute the fovx from the fovy.  I read different things in different places and in I don't get the right behavior by using either method that I found.  So can someone please tell me, given the fovy of the camera and the aspect ratio, how to I calculate the fovx of the camera?  If any other data is needed that is fine just let me know what I need.  Thank you so much in advance!  </p>