# Using the Robert Penner tweening equations

**URL:** https://forum.kirupa.com/t/using-the-robert-penner-tweening-equations/137857
**Category:** Uncategorized
**Created:** [February 17, 2005, 10:49pm UTC](https://forum.kirupa.com/t/using-the-robert-penner-tweening-equations/137857 "2005-02-17T22:49:31Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![JamesO](https://avatars.discourse-cdn.com/v4/letter/j/ea5d25/32.png) [@JamesO](https://forum.kirupa.com/u/JamesO)
#### Post date: [February 17, 2005, 10:49pm UTC](https://forum.kirupa.com/t/using-the-robert-penner-tweening-equations/137857/1 "2005-02-17T22:49:31Z")

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Hey guys

Can anyone explain the way to use Robert Penner’s tweening methods? I have all the files. I understand that at the top of the actions you do include# tween.as or something like that (I just had to reformat my powerbook and haven’t loaded the files back on yet to look at exactly what that line of code is).