On Thu, Sep 30, 2004 at 10:49:33AM +0200, Boris Koenig wrote: > I think it is *theoretically* possible, basically one would need to > disable the standard FDMs (flight dynamic models) and let PS1 export the > corresponding values via some simple IPC/sockets mechanism - how is this > currently done ? I'd believe, they use FSUIPC for that purpose ?
Eventually yes (as that is/was the only known interface to MSFS; the monster now seems to have an official NetPipes entry, too). But all data flows through my Broker over plain ASCII TCP, and it is trivial to find out what they use. As far as I know, weather tends to be gathered via existing MSFS real weather programs, as MSFS can obviously do more tricks than PS1. But even this can be arranged for, I'm sure. Unlike most other flight sims, PS1 really is only treated as the systems engine. It is a plane sim, not a flight sim. It certainly is no operating system. All data exchange with the external world is not done by PS1 itself, but by an external, specialised program (the Broker). All the other add-ons are separate programs, written by a dozen or more authors in any language imaginable, capable of being run anywhere on the network. So the complete data interface is extremely thin: one single TCP pipe to the Broker, where interested other applications can subscribe to particular data items and get near-real-time updates. The system scales beyond imagination; I never thought it would be able to drive Matt Sheil's rig: http://www.hyway.com.au/747/747.html But it does! I've been there, flew it, it really works very well. And my recent visit to Lufthansa's sim base in Frankfurt (14+ hours in the sim, as much time with my head inside the computers one floor below) revealed that the real stuff uses nearly the same approach. > My current impression is that this might not even be SUCH a big issue, but > I may very well be wrong :-) If FG would have a socket somewhere that will eat control data for the position, attitude, and maybe some other variables to steer the virtual windshield camera around, this certainly should be "easy." We don't want any panel in view, just the forward view (and some people some side views on separate machines). > But how can you use "CLOSED SOURCE" with TCL/TK ? Do you additionally > use binary libraries ? (that's what we were suggested to do ...) >From the start I used TclPro, which has the required capabilities. It can either compile Tcl source to a binary format and source this in instead of plain ASCII (but the users must install TclPro, which I hate); or it can "wrap" all Tcl source together with a virtual filesystem with other files into one single executable for a great many platforms. I chose the latter way since about January 2000 and VATSIM/IVAO never even blinked. Jeroen _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
