Softbody with Flash

February 13, 2008 by Emanuele Feronato
Filed Under Flash, Users contributions •  

As I supposed, it did not take long before some ideas posted in the forum become reality in the blog.

I am talking about the post about soft body engine that I recommend you to read before continuing with this post.

From Wikipedia: Soft body dynamics is an area of physics simulation software that focuses on accurate simulation of a flexible object. That is, the object is deformable, meaning that the relative positions of points of the objects can change.

I received an email from Jack Hopkins, that wants to share with us two examples of a soft body engine

Dear Emanuele,
I have noticed some qualms about a Softbody Engine on your forum, so…I went ahead and made one,
i’ve included it here, its annotated and if you want to distribute it on your blog for the people that want one I would be honoured to let you.
from Jack Hopkins (Noddybear)

Jack sent me two versions of the engine… the first one is his “work in progress” while the second one is almost all API

In both versions you control the “blob” with arrow keys, but in the second one you can “jump” pressing mouse button and your blob will react to movie edges.

First one

Second one

And source codes.

Enjoy, and thank Jack Hopkins

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8 Responses to “Softbody with Flash”

  1. Jack Hopkins on February 13th, 2008 6:48 pm

    Thanks emanuele!
    Ive been watching your blog for a year now and i just wanted to contribute something!
    Thanks again

  2. Keith Peters on February 13th, 2008 8:04 pm

    http://www.bit-101.com/base.html

    Check out May 21-24, 2003.

    Source in http://www.bit-101.com/flafiles/ by date: yymmdd.fla, ie. 030521.fla is may 21. :)

  3. Frederik J on February 13th, 2008 9:08 pm

    Hi there.

    Really great engine, it’s very handy, and very useful.

    I found a bug. When you get close to the border, you get flat, as you should. But if you keep holding the down key, you’ll still move. Not visible, but when you’re going up again, it takes plenty of time to move. Except that: Great engine!

    Cheers Frederik J

  4. Matt on February 13th, 2008 10:45 pm

    I think the problem with the blob become flat when moving into the sides is that the center of the blob isn’t pushing away from the points of the blob. It’s just the points of the blob, pushing away from the center.

  5. Jack Hopkisn on February 14th, 2008 12:13 am

    Matt - To do what you ask would be possible but would use a hellova lot more CPU

    Fred - Thanks Fred! I didnt have time to fix the glitch but its because the softbody follows an MC,
    the softbody cant leave the stage, but the MC can.
    If you could do something with it I would be very grateful!

  6. Frederik J on February 14th, 2008 9:32 am

    You could just move the m, and it’s width out of the stage. When it reach it’s place, you could stop it - Like it hits a wall. :-)

  7. Jack Hopkisn on February 14th, 2008 9:59 am

    I’ll have a go at it.
    I’ll post it on the forums

  8. xavi on February 15th, 2008 3:27 am

    what’s the use of this engine,
    will you be using it in the future?

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