--- Mathias Fröhlich <[EMAIL PROTECTED]> wrote:
> 
> On Montag, 5. April 2004 14:12, Jim Wilson wrote:
> > This sounds like it might be excessive.  We should continue to
> model
> > instrumentation in flightgear.
> Fine.
> > Nothing more on this is needed from the FDM 
> > (we should only be translating to sensor points _if_ the particular
> > aircraft models the instrument).
> > That translation could easily occur in a 
> > Instrumentation/ subclasses.  It would then be standardized across
> FDM's,
> > which is why it is not advisable to increase the complexity of the
> FDM
> > interface.  We're having enough trouble keeping what we have
> standard.
> Yep, I think this too. FGInterface is way too heavy. And too little 
> standardized. And it is too little documented :)
> 
> This seperation between hard and soft values are thought to make
> things a bit 
> leaner and cleaner. But I am not shure if I can reach this goal with
> that.
> 
> What I can tell is that I think FGInterface needs to be cleaned out
> to some 
> degree.
> 
> Ok, back to the original subject:
> I am interrested if JSBSim should rely on the /preset/sim/onground
> property to 
> be set correct or if we should think of some heuristic to find out
> how we 
> should trim?

The trimming routine is not the problem. 

Jim W. said it himself, the behavior changes when -9999 is set as the
altitude.  Well, the only place such logic exists is in src/Main, not
src/FDM.  I think eyeballs need to be directed that way.  Furthermore,
nothing regarding the trimming routine has changed for at least three
weeks.

I really am at a loss to explain why we have to go through this "blame
the trimming routine" routine every time it fails.  The trimming
routine does not do magic, it's just a 6-dof zero finder, something
every engineer learns how to code in school. It is not a mysterious
black box.  As such, it is no different than any other piece of code:
GIGO.



> 
>     Greetings
> 
>         Mathias
> 
> -- 
> Mathias Fröhlich, email: [EMAIL PROTECTED]
> 
> _______________________________________________
> Flightgear-devel mailing list
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> 
> 


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