I wrote a little routine that allows flightgear to read in the csv data from a previous flight (or from a standalone JSBSim flight) and replay it as a flight. I can use the joystick to adjust the speed and I can play it forward or reverse. Would that be useful to anyone else?
Mark > -----Original Message----- > From: Jon S Berndt [mailto:[EMAIL PROTECTED]] > Sent: Friday, March 08, 2002 9:30 AM > To: [EMAIL PROTECTED] > Subject: Re: [Flightgear-devel] idea ... (?) > > > On Fri, 8 Mar 2002 10:00:54 -0600 (CST) > "Curtis L. Olson" <[EMAIL PROTECTED]> wrote: > >I know for the general case an external graphing tool > >would be most useful (and I think Jon B. has stuff to do > this already.) > > Yes, it's a very useful command line tool that plots files > of CSV format (comma delimited value format) data, where > the first line contains descriptions of the data. It can > plot interactively or it can plot a standard set of graphs > (producing .png image files) that are linked to via > descriptive links from a main html web page. It is very > slick. Unfortunately it uses a closed source library - the > library is freely available for most platforms, but some > people here don't like anything that is not completely > open source. So, a nice alternative (in my mind) would be > for someone to write a post-processor for the CSV files to > plot (either interactively or via .XML input directive > file, as I have now for "simplot") the data using pgplot, > or some other open source plotting program. > > In the near term, one of the quickie projects I want to do > is to write a small routine that will produce color > postscript reports as directed by a directives file. I've > written several post-processing tools over the years > (including one that used SGI GL to render 3D views of the > Space Shuttle Orbiter separating from the External Tank in > an abort study for NASA). Fun stuff. Anyhow, postscript is > nice and simple, and GhostScript has some nice utilities > for viewing them. Might be able to also convert them > quickly to PDF format with pstopdf. There are lots of > possibilities, but for me the important thing is to keep > it simple, automated, and quick. > > Another nice thing to have would be a stripchart data > display that could be run on a remote machine. If I only > had a few more hours a week ... > > >But, I was just thinking today that it might be cool to > >have a built in grapher for simple / quick graphing needs. > > > >With the property system it would be trivial to pick an > >arbitrary property from the property tree and graph it over time -- > >superimposed on top of everything else. > > I wonder if a remote (or even local) stripchart display > program would be better? > > >Things get a bit trickier if you want to control scaling, > >how much time history get's graphed, multiple values, etc., but > >even graphing a single value (or maybe just two values) over > time could > >be of some use. > > You might want to do this via autoscaling, but with > initial values suggested in a directives file. > > Jon > > _______________________________________________ > Flightgear-devel mailing list > [EMAIL PROTECTED] > http://mail.flightgear.org/mailman/listinfo/flightgear-devel > _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
