Elastics/Jelly flickering reduction

Discussion about Softbody / cloth simulation in Realflow 3
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ChristianZ
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Elastics/Jelly flickering reduction

Postby ChristianZ » Wed Sep 27, 2006 8:37 am

Hi !

as we have seen in the elastics and especially "jelly-type" animations that I showed in the animation section, there is a lot of flickering going on in some of the elastic bodies.

After some experimentation I see now the parameter "damping" as the main culprit. Here are two movies and the only difference is in the damping setting being once =0 or =10. The movies show a sphere emitter with elastic properties hitting the floor and getting deformed in the process.

In the mean time I also tried damping=1000 which crashed RF. So use this parameter carefully :)

http://www.cardiomyocytes.com/movies/jellyball%20round%20damping10.mov

http://www.cardiomyocytes.com/movies/jellyball%20round%20damping0.mov
RF10 standard, System specs: OSX 10.11, MacPro 4.1 2xXeon, GTX980Ti, 64 GB RAM


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zoom 7.3
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Elastics/Jelly flickering reduction

Postby zoom 7.3 » Thu Sep 28, 2006 6:52 pm

i completely agree with you, the damping parameter controls the realism of simulation,and it's not so safe as its unlogical values causes faliure of the calculations

very nice videos , i really can see the difference between the previous videos and these ones :biggrin::cool:
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Imatk
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Elastics/Jelly flickering reduction

Postby Imatk » Mon Oct 29, 2007 6:10 pm

Cool... could you do a tutorial of how you did this?

I can't seem to find any on elastics.

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ChristianZ
Posts: 3278
Joined: Sat Sep 09, 2006 11:37 am
Location: CH

Elastics/Jelly flickering reduction

Postby ChristianZ » Mon Oct 29, 2007 9:55 pm

Hi !

elastics as such is too simple as a topic for a tutorial, I think. But I can tell someting about the steps in the example shown:
1) create a plane and a sphere emitter above
2) make the sphere emitter being of the "elastic"-type (instead of liquid, gas, or dumb).
3) add gravity, use "fill sphere" for the sphere emitter
4) start simulation. If the elastic is destroyed on impact, increase the amount of springs, this makes it harder.

There is also another thread, where I have posted a project for jelly and some movies:
http://www.realflowforum.com/view_topic.php?id=24
RF10 standard, System specs: OSX 10.11, MacPro 4.1 2xXeon, GTX980Ti, 64 GB RAM


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