Hey guys, I gotta admit that I joined up so I can sove this problem but this look slike a good forum to check out anyway.

I'm trying to constrain one locator to a fixed radius from another locator. Sounds easy, but I've tried a hundred ways of doing this with no success.

With the distanceDimnesion command you can define the distance and get a value - but you can't limit it! anoying.

I wont go into all my other attempts, but one way that sort of works is constraining the outside locator to the geometry of a sphere who's pivot point is on the inside locator. This works pretty well, but once I start scaling up the sphere (which I need to be able to do) the outside locator jumps around a little. Nothing I can do to stop this.

So, my question is, is there a way to do this mathematicly? or maybe theres a simpler way I havn't seen yet?

thanks for any help - alex.