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 Post subject: air friction discussion
PostPosted: Thu Feb 14, 2008 1:03 pm 
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Joined: Thu Sep 29, 2005 2:59 pm
Posts: 828
I just discovered this thread about air friction in ODE. Maybe could be an interesting reading and also a future feature like:
raydium_air_friction_enable();

http://groups.google.com/group/ode-user ... c7963eace1


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 Post subject: Air friction
PostPosted: Thu Feb 14, 2008 5:32 pm 
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Joined: Sun Oct 09, 2005 10:46 pm
Posts: 759
Hello,

Air friction needs extra definition for an object such as "trainée" and "portance". Sorry but i can't find a translation for those terms.

It's quite easy to handle them in the ode step callback.

But it's quite an interesting feature to add to raydium.

Have a nice day.

Ouille.


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 Post subject:
PostPosted: Fri Feb 15, 2008 10:01 am 
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So you think it should be added into Raydium? fine then.
Xfennec, can you give me a translations for those terms Ouille wrote in the previous post?
And Xfennec what do you think about?


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 Post subject:
PostPosted: Sun Mar 09, 2008 10:11 pm 
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Air friction (and buoyancy for water) are interesting subjects, for sure ... but all this is very complex ! In facts, IMHO, it's almost impossible to add such support in a stable and generic way to ODE ... :/ (it's a common subject on the ODE mailing list)

But we can try to provide a simplified support, why not.

"trainée" should probably be translated as "drag" and "portance" as "lift", I think. But lift is only needed for things like planes, for example, and not a rolling sphere on a flat ground, where drag is enough to do the job. And we only have a very very simple "drag emulation" with raydium_ode_element_rotfriction(), for example.


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 Post subject:
PostPosted: Mon Mar 10, 2008 12:22 am 
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Hello,

Drag and lift, thank you for the translation.

Drag and list can be simulated by forces.

I work on this, but it depend on lot's of aero dynamic property far away (i think) from the engine.

Vincente if you are interested for the pre alpha code pm me.

have a nice day
Ouille


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