Quick question

[Doush.]

Hey guys,

Just wondering if someone could help me out with a formula for easing out. I can ease in fine but I'm confused on how to ease out.

I'm trying to get an object to move towards a point by speeding up and stopping at the point.

So origin_x is 10 and destination_x is 200, so its last x step should be its fastest before it stops?

Thanks

[newblack]

looks like you're actually trying to do ease in...

you can use exponential interpolation:

function easeIn( begin:Number, end:Number, t:Number, power:Number = 5 ) : Number
{
   return begin + ( end - begin ) * Math.pow( t, power );
} 

where begin is your original value, end your target value, t is a value 0 <= t <= 1 that represents the percentage through the animation time. the higher the power the slower the acceleration and the faster the end speed.

[Doush.]

Thanks newblack. One question about the t variable. Do I increment it every time the function is called

time = 0;
thing.x = easeIn(0, 200, time);
time++;

[newblack]

you want it to be currentTime / duration, so when the animation starts, t = 0, and at the end it's equal to 1.

[Doush.]

Ahh I see understood. Works a treat. Thanks heaps for your help newblack.