Define World Limits based on moving object?

#1 The world limits are defined as a min-x/y and a max-x/y -- only. But you can regularly update the worldlimits for an object to be relative to another. Something like this maybe:

$wlOffset = "10 10";
$wlUpdateInterval = 300;

function updateWorldLimits( %obj1, %obj2 )
{
   if ( !isObject( %obj1 ) || !isObject( %obj2 ) )
      return;

   %pos = %obj2.getPosition();
   %min = t2dVectorSub( %pos, $wlOffset );
   %max = t2dVectorAdd( %pos, $wlOffset );
   %obj1.setWorldLimits( %obj1.worldLimitMode, %min SPC %max, %obj1.worldLimitCallback );

   schedule( $wlUpdateInterval, %obj1, updateWorldLimits, %obj1, %obj2 );
}

Setting the mode to clamp would accomplish what you want I believe. It could have some issues though...

Since this update is happening in script through a schedule... it can, at most, happen once per tick. For that, and other reasons, it could result in a popping look when the limits are updated and the object is "teleported" back inside the world limits. On the other hand, without testing this, it could actually not work at all, but its a starting point.

You might want to investigate using impulses to keep the object inside the "bounds". For instance, if you store the object's "desired" velocity ( calculated by play input or some AI ), then add to it some "steering" velocity to keep it within the bounds, you might get a smoother look ( but it wouldn't be guaranteed to stay in the bounds ). This too would need to be calculated each tick or relatively frequently.

#2 James:

Thanks a lot for the information! I read it some time ago but somehow forgot to say thanks! Sorry about that. :-)

#3 Best of luck!

#4 Can we mount objects to the camera? cause then we could set up several objects off screen linked to the camera to act as moving world limits.