ecmascript:

function set_translation (eventValue)
{
   x = eventValue.x;
   if (tracePrint)
   {
      Browser.println ("========================");
      Browser.println ('                  x=' + x);
   }
   // clamp values to prevent overrun/underrun, in case minPosition/maxPosition fail
   if (x >  3.0) x =  3.0;
   if (x < -3.0) x = -3.0;

   translation_changed = eventValue;
   angle = Math.round(x * 90.0 / 3.0);
   rotation_changed = new SFRotation (0, 1, 0, angle * Math.PI / 180.0);
   var angleString = angle.toString() + ' degrees'; // JavaScript string
   
// angleMFString_changed = new MFString (new SFString(angleString)); // only works in InstantReality
   angleMFString_changed = new MFString (angleString); // works in several players but not all
// angleMFString_changed = [ angleString ]; // Use JavaScript string array instead of MFString doesn't work
   
   if (tracePrint)
   {
      Browser.println ('          clamped x=' + x);
      Browser.println ("    set_translation=" + eventValue);
      Browser.println ("translation_changed=" + translation_changed.toString() + ", rotation_changed=" + rotation_changed.toString());
      Browser.println ("angle=" + angle + ", angleString=" + angleString + ", angleMFString_changed=" + angleMFString_changed.toString());
   }
/*
example console excerpt:
========================
                  x=-0.05248255282640457
          clamped x=-0.05248255282640457
    set_translation=-0.05248255282640457 0 0
translation_changed=-0.05248255282640457 0 0, rotation_changed=0 1 0 -0.03490658503988659
angle=-2, angleString=-2 degrees, angleMFString_changed="-2 degrees"
========================
*/
}