Re: [Jsbsim-devel] new ground-reaction with real terrain

[grtuxhangar t. <grt...@gm...>]

We must also think about the Rain and Snow
the terrain-static-friction value is influenced by those two parameters

within the Gerard's system it was easy to include it
by such
               <scheduled_gain
name="systems/gear/terrain-static-friction-coeff-snow">
                <input>systems/gear/gear-pos-norm</input>
                <table>

<independentVar>/environment/metar/snow-norm</independentVar>
                    <tableData>
                        0.0000    1.0000
                        1.0000    0.20000
                    </tableData>
                </table>
            </scheduled_gain>


How could we include it with the new system since the static friction can't
be accessed ?

Thanks

Josh





On 18 January 2014 13:41, grtuxhangar team <grt...@gm...> wrote:

> Hello, Erik
>
> I am convinced, after a lot of testing  , to me, that ground reaction with
> FG real terrain is very good.
>
> I just notice it s coming in addition to our existing process ( Gerard's
> process ), so sometime the related models get a strange behaviour.
> Should be solved after a huge update Model per Model.
>
> However I did not found any way to identify the terrain under, which is
> useful for:
> =>trigger the right behavior when on water, i mean for instance the
> Catalina which use his own hydrodynamic
>   and =>trigger the right behavior when on water, i mean animations when
> sinking.
>
> Anyhow ( but i did not check if we can do it )  some part of an aircraft
> can want a specific process gear and structure regardless the terrain, for
> instance aircraft with retractable/inflatable float which are also gear, we
> have it  ( helicopter ).
>
> Is it possible to have at least the terrain solid value exposed ( and why
> not the others terrain values ).
>
> Thanks a lot
>
> Josh
>
>
>
> On 17 January 2014 21:07, grtuxhangar team <grt...@gm...> wrote:
>
>> the link was not easy to get
>> so again
>>
>> C310 on sea<https://sites.google.com/site/grtuxhangar/home/download/jsbsim-new_groundreaction.jpg>
>>
>>
>> On 17 January 2014 21:04, grtuxhangar team <grt...@gm...> wrote:
>>
>>> @Erik
>>>
>>> done ,
>>>  then will longer try out.
>>>
>>>
>>> YES Bertrand
>>> this put an end in FlightGear forums to the recurring complaints about
>>> JSBSim ground reactions not being realistic ;-)
>>>
>>> C310<https://sites.google.com/site/grtuxhangar/home/download/jsbsim-new_groundreaction.jpg?attredirects=0&d=1>
>>> on sea
>>>
>>>
>>> Josh
>>>
>>>
>>> On 17 January 2014 18:12, Erik Hofman <er...@eh...> wrote:
>>>
>>>> On Fri, 17 Jan 2014 16:43:56 +0100
>>>> grtuxhangar team <grt...@gm...> wrote:
>>>>
>>>> > i'll give it a try.
>>>> > Help me with ./admin/jsb2fg
>>>> > i get the following
>>>>
>>>> Oh sorry reading your comments I was under the impression you already
>>>> were doing this.
>>>> >
>>>> >
>>>> >     ./models/FGSurface.cpp
>>>> >     ./models/FGSurface.h
>>>> >     ./input_output/FGPropertyReader.cpp
>>>> >     ./input_output/FGPropertyReader.h
>>>>
>>>> These files need to be copied to FlightGear/src/FDM/JSSim and added to
>>>> FlightGear/src/FDM/JSBSim/CMakeList.txt
>>>>
>>>> And examples/FlightGear.cxx must bo copied to
>>>> FlightGear/src/FDM/JSBSim/JSBSim.cxx
>>>> And examples/FlightGear.h must be copied to
>>>> FlightGear/src/FDM/JSBSim/JSBSim.h
>>>>
>>>> Then you would be ready for a fresh compile.
>>>>
>>>> --
>>>> Erik Hofman <er...@eh...>
>>>>
>>>>
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>>>
>>
>