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

[Erik H. <er...@eh...>]

On 01/19/2014 12:42 AM, grtuxhangar team wrote:
> Hello, Erik
>
> Ok, i understand why i have some models which get some strange behaviour.
>
> Looking at your code within jsbsim.cxx i find the following:
>
> static SGPropertyNode_ptr terrain_nas =
> fgGetNode("/fdm/jsbsim/environment/terrain-hight", false);
>     if (!terrain_nas && material) {
>
> thus the condition at ("/fdm/jsbsim/environment/terrain-hight", false)
> makes fg terrain taken in account or not.
> Unfortunately "/fdm/jsbsim/environment/terrain-hight"  is not ever
> present it depends on the aircraft and the age of the models ( older
> have not that property).
>
> So the condition cannot be hardcoded on it.

That's a real pity. I'll see if I can come up with another solution.

>
> We must  define a flag which will be used by every JSBSim Aircraft.
>
> Bertrand is right  the feature could be disabled by default, and the
> flag if present will enable the feature
> That's the best way to be sure we don't break the others models (jsbsim).

This is basically suggesting: the maintainers of 150 aircraft should do 
some work to  work around a problem created by a few other aircraft 
which took the opportunity to circumvent a missing feature the wrong way.

I think that's short sighted an I'm not comfortable with that.

Erik


-- 
http://www.adalin.com
- Hardware accelerated AeonWave and OpenAL for Windows and Linux
- AeonWave Audio Effects software for DJ, Instrumentalist and Vocalist