Re: [Jsbsim-devel] How do I change the code?

[Jon S. B. <jon...@co...>]

This isn't  a bad idea. I might even think about it, but it will cost you
double what I'm paying you. ;-)

 

We've already (IIRC) implemented an override of the integration rate from
the command line. An aircraft override might be a good idea, but scripts
*can* contain elements that are aircraft specific.

 

Jon

 

 

From: Bill Galbraith [mailto:bi...@be...] 
Sent: Thursday, December 16, 2010 7:14 PM
To: 'Development issues'
Subject: [Jsbsim-devel] How do I change the code?

 

How would I go about having a change implemented? Yeah, I know HOW to change
the code and comple it, etc, but I wold like to see it made part of the
distribution.

 

What I'd like to see is the command line option "--aircraft=" be able to
override the aircraft specification in a script file. Currently, it will not
allow it. I want to do this so that I can write scripts with a dummy
aircraft name in it, and it would REQUIRE that the name were specified on
the command line. If not specified, it would abort because it couldn't find
the dummy name. That way, you can just copy a script over to another
aircraft directory, say from Aircraft/plane_1/scripts to
Aircraft/plane_2/scripts, and not have to change anything in them if the
initial conditions were acceptable. Then, when you get around to customizing
them, they become unique to Plane_2. Without this, you copy the scripts
over, and forget to change the name in every scripts, and you end up running
the right script but with the wrong aircraft. This would also allow a
generic set of scripts to be put into the scripts directory that could be
used for any aircraft.

 

This also kinda changes the balance of power in the JSBSim world. Currently,
the script is the overriding ruler. You must specify the aircraft name in
the script, and there is no way around that. With my suggested change, some
of that power is taken away from the script and given back to the user, via
the command line.

 

So, do I put in a feature request, and some secret council votes on it at a
secret island ceremony, or do I just do it and throw it on the wall to see
if it sticks? Of course, I'd have to have someone else commit it, since I
don't have (nor do I want) write access to the CVS directory, at least not
right now.

 

Bill