OpenMW/mscripts/fpsticker.mn

// Small script that prints the FPS to screen with regular intervals.
import frames;

// Set up the text widget
Widget txt = gui.text("StaticText",
                      gui.getWidth()-90, 10, 120, 30,
                      "Statistic");
txt.setNeedMouseFocus(false);
txt.setTextColor(1,1,1);
txt.setCaption("hello!");

// Sleep until rendering begins. This just prevents the first printed
// value from being 'nan'
fsleep(0);

// counter and totalTime (in the 'frames' module) are updated
// automatically by the system.
ulong lastFrame  = counter;
float lastTime   = totalTime;

float delay = 1.5;

while(true)
{
  sleep(delay);

  // Calculate differences since last frame
  ulong fdiff = counter-lastFrame;
  float tdiff = totalTime-lastTime;

  txt.setCaption("fps: ", fdiff/tdiff);

  lastFrame = counter;
  lastTime = totalTime;
}