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RoughEase and Ease Visualizer

Ever wanted a more "gritty" transition like an alpha fade that flickers a bit or a position tween that jerks around before reaching its destination? Ever thought to yourself "smooth eases are for sissies"? If so, you're gonna like RoughEase. You can define an ease that it will use as a template (like a general guide - Linear.easeNone is the default) and then it will randomly plot points that wander from that template. The strength parameter controls how far from the template ease the points are allowed to go (a small number like 0.1 keeps it very close to the template ease whereas a larger number like 2 creates much larger jumps). You can also control the number of points in the ease, making it jerk more or less frequently. And lastly, you can associate a name with each RoughEase instance and retrieve it later like RoughEase.byName("myEaseName"). RoughEase is included in all the tweening platform downloads and is available in AS2 and AS3.

To demonstrate RoughEase, I whipped together an ease visualizer tool that may be useful even if you're not going to use RoughEase. Just select an ease and click "visualize". To make it rough...(I know, you'd never guess)...click "make rough" and play with the various parameters.

To build your own custom ease with bezier tools, you can use CustomEase.

Documentation

View ASDoc documentation.

Sample AS3 code

PLAIN TEXT
Actionscript:
  1. import com.greensock.*;
  2. import com.greensock.easing.*;
  3.  
  4. TweenLite.from(mc, 3, {alpha:0, ease:RoughEase.create(1, 15)});
  5.  
  6. //or create an instance directly
  7. var rough:RoughEase = new RoughEase(1.5, 30, true, Strong.easeOut, "none", true, "superRoughEase");
  8. TweenLite.to(mc, 3, {y:300, ease:rough.ease});
  9.  
  10. //and later, you can find the ease by name like:
  11. TweenLite.to(mc, 3, {y:300, ease:RoughEase.byName("superRoughEase")});

FAQ

  1. Can I make one property of a tween rough but not another?
    Each tween can only contain one ease, but you can certainly separate the properties into 2 (or more) tweens. For example, if you want to tween x roughly and y smoothly, you could do:

    PLAIN TEXT
    Actionscript:
    1. TweenMax.to(mc, 1, {x:300, ease:RoughEase.create(0.5)});
    2. TweenMax.to(mc, 1, {y:200, ease:Quad.easeOut});

  2. Is RoughEase available in AS2 and AS3?
    Yes.
  3. How do I install the class? Do I have to import it on every frame?
    Please refer to the "getting started" page.
  4. Do I have to purchase a license to use this code? Can I use it for commercial purposes?
    You may use the code at no charge in commercial or non-commercial web sites, games, components, applications, and other software as long as multiple users are not charged a fee of any kind to use your product or gain access to it. If your client pays you a one-time fee to create the site/product, that's perfectly fine and qualifies under the "no charge" license. If multiple users are charged a usage/access/license fee of any kind, please simply sign up for a corporate Club GreenSock membership which comes with a special commercial license granting you permission to do so. See http://www.greensock.com/club/ for details. Club GreenSock members get several nifty bonus plugins, classes, update notifications, SVN access, and more. Your donations keep this project going. Please see the licensing page for details on licensing.

Need help?

Feel free to post your question on the forums. You'll increase your chances of getting a prompt answer if you provide a brief explanation and include a simplified FLA file (and any class files) that clearly demonstrates the problem.

Author: Jack Doyle, (e-mail: jack -at- greensock.com)
Copyright 2010, GreenSock (This work is subject to the terms here.)

Comments (6) RSS

Posted by chris mcandrew on December 22, 2009

Wow, very cool man, very cool. I could see this being useful for animating charts and all of that fun stuff. Keep up the great work and looking forward to trying this out! Happy Holidays.

Posted by Matthias on December 23, 2009

You keep pulling rabbits out of your hat, Jack! Amazes me. Very cool stuff.

Posted by Rowan Gray on December 23, 2009

*One huge elongated sigh of relief*

I’ve been having to bodge this effect with customEase until now.. Jack your a true life saver!

Posted by Zync on January 21, 2010

This is awesome. For ages i was looking for a way to make object flicker is like a florescent light and this makes it happen perfectly.

Posted by Carlos Hernández on February 4, 2010

Very useful!! Thanks.

Posted by DIGGITY on March 17, 2010

this is PERFECT for flicker effects ! :) thanks!

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