# How do I can build a jelly sprite?

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### » Fri Jun 10, 2016 8:03 pm

hi
can i build jelly sprite or jelly physics?
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### » Fri Jun 10, 2016 11:53 pm

What you are asking for requires ridiculously insane mathematics.

This is the closest I could find on a quick research: http://stackoverflow.com/questions/3157 ... l-three-js

There are not many plastic physics engines out there. You can mimic it using elastic physics and stickiness though.
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### » Sat Jun 11, 2016 2:11 am

It's basically done with a bunch of springs. Hook's law is the equation to use to calculate spring force. Then it's just a matter of tuning the constants. So the math isn't that bad at all.

Searching for jelly gives these two:
viewtopic.php?f=147&t=116686&p=840413&hilit=Jelly#p840413
viewtopic.php?f=147&t=66051&p=563549&hilit=Jelly#p563549

The first one is more applicable I suppose. It's just a grid of point connected by a mesh of springs. Making it interact with other objects is where the most work is needed and there are many ways to handle it.
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### » Sat Jun 11, 2016 2:38 am

Inb4 @R0J0hound gets bored and makes a hooks_jelly plugin xD

~Sol
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### » Sat Jun 11, 2016 5:05 am

thanks guys
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### » Mon Jun 13, 2016 2:34 pm

R0J0hound wrote:It's basically done with a bunch of springs. Hook's law is the equation to use to calculate spring force. Then it's just a matter of tuning the constants. So the math isn't that bad at all.

Yea, you can generally simplify it, if you are willing to sacrifice precision.
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### » Mon Jun 13, 2016 5:06 pm

Physical accuracy isn't really important in this case since you're going for a look, and a bunch of springs will be enough to do that here.

Wikipedia has a good overview of the methods.
https://en.wikipedia.org/wiki/Soft_body_dynamics
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### » Tue Jun 14, 2016 7:00 pm

R0J0hound wrote:Physical accuracy isn't really important in this case since you're going for a look, and a bunch of springs will be enough to do that here.

Wikipedia has a good overview of the methods.
https://en.wikipedia.org/wiki/Soft_body_dynamics

I am just OCD most times, lol.
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