Re: [Flightgear-devel] Startup position offsets (fg_init)

2008-08-25 Thread James Turner
On 25 Aug 2008, at 03:25, Curtis Olson wrote: Hi James, I think this was all done intentionally because it's quite common to want to start a flight simulator on a 5 or 7 or 10 mile approach so you can practice ILS landing. The start-offset-m value I believe was added later to account

Re: [Flightgear-devel] Startup position offsets (fg_init)

2008-08-25 Thread John Denker
On 08/24/2008 01:53 PM, James Turner wrote: Doing this, I came across something which seems counter-intuitive to me: I agree, it's counterintuitive, to say the least. default azimuth to offset by is the *reciprocal* runway heading. This means to start 10nm 'out' from the threshold, one can

Re: [Flightgear-devel] Startup position offsets (fg_init)

2008-08-25 Thread Curtis Olson
On Mon, Aug 25, 2008 at 3:12 AM, James Turner wrote: On 25 Aug 2008, at 03:25, Curtis Olson wrote: Hi James, I think this was all done intentionally because it's quite common to want to start a flight simulator on a 5 or 7 or 10 mile approach so you can practice ILS landing. The

Re: [Flightgear-devel] Startup position offsets (fg_init)

2008-08-25 Thread John Denker
On 08/25/2008 02:45 PM, Curtis Olson wrote: Can you further explain what the bug involves? In my experience, placing the aircraft on the glide slope several miles out and flying the glide slope all works fine, or am I missing something here? In my experience, the glideslope initialization

Re: [Flightgear-devel] Startup position offsets (fg_init)

2008-08-25 Thread Curtis Olson
Hmmm, ok I suppose that is possible. I have done this with an external FAA certified flight dynamics model, but I am letting the flightgear code compute the final longitude and latitude and altitude and just passing that over. This has worked as recently as 2 weeks ago. I don't know that I've

[Flightgear-devel] Startup position offsets (fg_init)

2008-08-24 Thread James Turner
I'm writing some automated testing code for pieces of FG, so that I can experiment with changes to various internal bits of code with more confidence that I haven't broken anything. These aren't quite unit- tests (they test multiple areas of the code at once) and they're pretty crude, but

Re: [Flightgear-devel] Startup position offsets (fg_init)

2008-08-24 Thread Curtis Olson
Hi James, I think this was all done intentionally because it's quite common to want to start a flight simulator on a 5 or 7 or 10 mile approach so you can practice ILS landing. The start-offset-m value I believe was added later to account for the difference in aircraft size. A starting position