Hi,
This is the fake Gravity algo. I have copied this from book “Flash MX 2004 Game Design”.
//————– Copy from here ——————-
// Object require on Stage
// ball:MovieClip – Idally with a circle or whatever you want.
var ymov:Number = 0;
//
var gravity:Number = 2;
ball.onEnterFrame = function() {
ymov += gravity;
ball._y += ymov;
if (ball._y>(Stage.height – ball._height)) {
ball._y = Stage.height – ball._height;
ymov *= -1;
}
};
//————– Stop Copying ——————-