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
