* Mathias Fröhlich -- Thursday 26 May 2005 13:18:
[still problems with locations on tile^Wbucket boundaries]
> Can you send me a location where it does not work?
lon: 16.5 lat: 48.5833
Proof that it's on a bucket boundary (although obvious):
$ calc-tile 16.49999 48.5833
Longitude: 16.49999
Latitude: 48.5833
Tile: 3220129
Path: "e010n40/e016n48/3220129.stg"
$ calc-tile 16.5 48.5833
Longitude: 16.5
Latitude: 48.5833
Tile: 3220130
Path: "e010n40/e016n48/3220130.stg"
Proof that there's a bug (comments in curly brackets; blank lines inserted):
$ fgfs --telnet=4711 --aircraft=ufo --fdm=null >/dev/null 2>&1&
[1] 13056
$ telnet localhost 4711
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
{ setting lat/lon to some arbitrary position; reading elevation }
set /position/latitude-deg 48.5833
/position/latitude-deg = '48.583300' (double)
/> set /position/longitude-deg 15.12345
/position/longitude-deg = '15.123450' (double)
/> get /position/ground-elev-m
/position/ground-elev-m = '586.518298' (double)
{ OK; works (assuming the elevation is correct) }
{ now changing to other arbitrary position; reading elev }
/> set /position/longitude-deg 15.54321
/position/longitude-deg = '15.543210' (double)
/> get /position/ground-elev-m
/position/ground-elev-m = '566.886987' (double)
{ different elevation; looks good }
{ now going to "problem position"; reading elevation }
/> set /position/longitude-deg 16.5
/position/longitude-deg = '16.500000' (double)
/> get /position/ground-elev-m
/position/ground-elev-m = '566.886987' (double)
{ huh? same elevation to the 6th digit? Can't be! }
{ adding 0.0001 to longitude; reading elevation (my workaround) }
/> set /position/longitude-deg 16.5001
/position/longitude-deg = '16.500100' (double)
/> get /position/ground-elev-m
/position/ground-elev-m = '218.889957' (double)
{ oh, yes; that works }
/> quit
Connection closed by foreign host.
$
BTW: the scenery doesn't show anything unusual and suspicious. Not even the
familiar crack line. And starting fgfs with --lon=16.5 --lat=48.5833 works
flawlessly.
> I have something in my tree which could help, if the problem is at the point
> I
> expecte it to be ...
Cool. (It's not that I'm unwilling to find the bug myself. It just got in
my way when I was working on something else, and I didn't want to get distracted
by that. A workaround was preferable at that time.)
m.
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