Re: [Supertuxkart-devel] Skidding and friction handling

[Constantin P. <con...@ru...>]

Joerg Henrichs schrieb:
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> Hi all,
> 
> I just enabled a first implementation of 'triangle specific' friction
> handling, and therefore skidding. I am using a simplified approach (as
> opposed to the correct but rather complicated way) recommended by Erwin.
> We should see if this is good enough for what we want to do.
> 
> Instructions: all karts have a friction slip value of 10000000 (based on
> the settings in the bullet kart demo, I don't know what oder of
> magnitude this value should be). This value is now multiplied by the
> friction value (taken from the materials.dat file) of the triangle the
> kart is on (atm all four wheels are always on the same material,
> determined by the center of the kart) to give the actual friction slip
> used for the kart.
> 
> The value of 10E6 for friction slip is very high, and I would assume
> that for better friction feeling a lower value should be set. But this
> needs some tuning I guess, I don't have any experience with proper
> values here.
> 
> I set the friction of 'sand' to be 0.0000001 (see materials.dat), so
> that the resulting friction slip is 1.0 on sand, which lets the kart
> skid a bit when turning on sand (e.g. race track, beach).
> 
> Please play with the values, e.g. perhaps reduce the friction slip for
> the karts till it feels 'right' when driving on the track, and/or change
> more friction values of terrain. Avoid a friction value of 0, since the
> kart will hardly be able to leave the terrain anymore.
> 
> Ideally, we would be able to reduce some of the shortcuts which are
> possible in the tracks by appropriate friction setting ... but not in
> all cases I guess (e.g. race track: just drive straight, the loss of
> acceleration due to the reduced friction slip is not big enough, it's
> still faster to take the shortcut).
> 
> Enjoy!
>    Joerg
> 
> 
> - --
> - ----------------------------------------------------------------
> Joerg Henrichs
> Luding Administration
> e-mail: jo...@lu...
> URL:    http://luding.org
> 
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Since I'm currently finished with my kart-individualisation-work and 
wanted to commit the .tkkf-files tomorrow(forgot my stick at home), I 
would really enjoy to tweak the friction parameters, too, if you like.