Re: [Flightgear-devel] AGL and HUD
Hi, In current CVS it should work again, if not, tell me please! On Donnerstag 06 Oktober 2005 16:03, Curtis L. Olson wrote: This looks suspicious: CVS log for source/src/Cockpit/cockpit.cxx Mathias Fröhlich has his name attached to the change from rev 1.13 to rev 1.14. This changes the AGL strip to read hight above some runway, not current terrain. This isn't intended to be a real instrument I guess, but perhaps work similar to a radio altimeter which does show you the height above current terrain. The CVS logs don't mention any intent to change this behavior, and I don't recall any discussion, so I'd like to change the default behavior back to reporting height above the current location. It did not want to change that behavour (though I did, a least for YASim, but that was a bug). That runway altitude is the FDM interfces' ground elevation. Look into FGInterface, both get_Runway_altitude and get_ground_elev_ft return the same value. What was there before, the 'current scenery altitude', contained the same value, the altitude of the ground triangle below the aircraft. Hmmm, it seems like the original get_cur_elev() has been removed from the api. Yep, I removed that one in favour to a more finegrained function returning the ground's altitude at a given lat/lon pair in FGScenery. The scenery elevation somewhere near the aircraft is stored currently in FGInterface. Also we have a scenery elevation value in SGLocation, that one is used for the current view's scenery elevation which might be different than the current aircrafts. That lat/lon dependent query function has some applications in the AI/ATC directories, where we had duplicated code of that query. Having that is definitly a win. Whenever it is not yet working correctly, tell me please. Greetings Mathias -- Mathias Fröhlich, email: [EMAIL PROTECTED] ___ Flightgear-devel mailing list Flightgear-devel@flightgear.org http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
[Flightgear-devel] AGL and HUD
I have had this problem with an older version of FG, around 8.0, when using a separate computer for the scenery. For reasons unexplained the altitude was set initially in /Network/native_fdm.cxx as an addon to the runway height, then the AGL changed, and with it the altitude. I fixed it for our purposes by locking the AGL to the takeoff runway altitude, but the current version does it the other way, getting AGL from the altitude and subtracting the current ground elevation to get the AGL. I don't know if this helps in your case. Rex [EMAIL PROTECTED] ___ Flightgear-devel mailing list Flightgear-devel@flightgear.org http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
Re: [Flightgear-devel] AGL and HUD
rhett3 wrote: I have had this problem with an older version of FG, around 8.0, when using a separate computer for the scenery. For reasons unexplained the altitude was set initially in /Network/native_fdm.cxx as an addon to the runway height, then the AGL changed, and with it the altitude. I fixed it for our purposes by locking the AGL to the takeoff runway altitude, but the current version does it the other way, getting AGL from the altitude and subtracting the current ground elevation to get the AGL. I don't know if this helps in your case. This looks suspicious: CVS log for source/src/Cockpit/cockpit.cxx Mathias Fröhlich has his name attached to the change from rev 1.13 to rev 1.14. This changes the AGL strip to read hight above some runway, not current terrain. This isn't intended to be a real instrument I guess, but perhaps work similar to a radio altimeter which does show you the height above current terrain. The CVS logs don't mention any intent to change this behavior, and I don't recall any discussion, so I'd like to change the default behavior back to reporting height above the current location. Hmmm, it seems like the original get_cur_elev() has been removed from the api. Did someone just bandaid in a quick call to runway altitude (which is probably not updated as you fly from place to place?) Regards, Curt. -- Curtis Olsonhttp://www.flightgear.org/~curt HumanFIRST Program http://www.humanfirst.umn.edu/ FlightGear Project http://www.flightgear.org Unique text:2f585eeea02e2c79d7b1d8c4963bae2d ___ Flightgear-devel mailing list Flightgear-devel@flightgear.org http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
