This is a very topic, but it is not very understanding, I got it today ... Compare Easy
The core code is this._x = (destination ._x-this._x) / A is OK,
http://www.gotoandplay.it/articles/
There is another original program!
Put the time axis: Two movieclip, a call called Ball, a button is OK, the code is as follows:
Ball is above
OnClipEvent (Enterframe)
{
IF (_root.ballplay == true)
THIS._X = (_ root.ballarrival._x-this._x) / 9;
}
Add:
OnRelease ()
{
_Root.ballplay = true;
}