I am trying to implement a penner equation. Want my menu to ease int its position. However I am having no luck.
Here is the Penner equation and my implementation try.
[AS]
// IMMEDIATELY BELOW IS MY IMPLEMENTATION
MovieClip.prototype.linearTween2 = function(endx, endy, duration, startingx, startingy) {
var t;
this.onEnterFrame = function() {
if (t++<duration) {
var x = Math.abs(endx-startingx) * ((t = t/duration-1)t((s+1)*t+s)+1)+ startingx, y = Math.abs(endy-startingy) * ((t = t/duration-1)t((s+1)*t+s)+1)+ startingy;
this._x += x;
//this._y += y;
} else {
delete this.onEnterFrame;
}
}
}
// BELOW IS THE PENNER EQUATION
// back easing out - moving towards target, overshooting it slightly, then reversing and coming back to target
// back easing in - backtracking slightly, then reversing direction and moving to target
// t: current time, b: beginning value, c: change in value, d: duration, s: overshoot amount (optional)
// t and d can be in frames or seconds/milliseconds
// s controls the amount of overshoot: higher s means greater overshoot
// s has a default value of 1.70158, which produces an overshoot of 10 percent
// s==0 produces cubic easing with no overshoot
Math.easeOutBack = function (t, b, c, d, s) {
if (s == undefined) s = 1.70158;
return c*((t=t/d-1)t((s+1)*t + s) + 1) + b;
}
[/AS]
