title: How to get current camera position from view matrix?
body: <p>I've implemented a simple arc-ball camera and it works well - when I use the mouse, I update the View matrix with roll, pitch and yawn.</p>
  
  <p>However, in order to properly calculate specular reflection, I need current camera position in world space which is not updated per-se when applying rotation.</p>
  
  <p>Do you guys know how can retrieve current position from the View matrix? Or is there another way to update this?</p>