easeOutElastic - NaN result

[cimak]

fabric.util.ease['easeOutElastic'] returns NaN for these arguments: 2, 1, 0, 550
// 0 is the problem

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[kangax]

Why do you set 3rd argument at 0?

[cimak]

Its not me, look: http://jsfiddle.net/JvA8v/1/
Only first animation works fine. Next are just "jumping" because of "left" and "top" properties are wrongly calculated as NaN.
I just tracked down, that this 3rd argument is causing the problem.
Sorry I didn't describe it more precisely before.

[kangax]

If you could submit a PR that would be super awesome

[asturur]

i resumed this old issue. I fixed the normalize function where there was a Math.sin(0/0).
The point is that the original fiddle for the issue is not supposed to animate animore after the first animation. After animating to 4,33, the next animation start from that point and is not going to move.
Effectively the bug was there, since after the first animation they were returning NaN.

new http://jsfiddle.net/JvA8v/4/
old http://jsfiddle.net/JvA8v/5/

They are both working if the animation start and end to a different point.