Re: [Flightgear-devel] Re: Speed of CVS version and flying in the Himalayas
On Donnerstag 26 Mai 2005 16:31, Melchior FRANZ wrote: > And, yes. This solves the ugly hang. But I do still not get a correct > elevation! Yes, what that does is to accept points to be inside the triangle in question which are slightly outside that triangle. By slightly I mean up to at most that eps in meters at the very beginning of that patch. The problem with that approach is that this meaning of 'being eps meter outside the triangle' is not usual geometric distance. Depending on the shape of the triangle this tolerance could be far smaller than that number given with eps. But in this case 0.1mm seem to be sufficient. And rolling on a surface which is at most 0.1mm away is not that bad anyway ... I hoped that the wrong transform coverd all problems, at least it covered the ones I have tried. But at first I searched in the area of this patch, so, I kept that one ont of the tree until somebody complains that it is still not sufficient. :) Feel free to apply. Greetings Mathias -- Mathias Fröhlich, email: [EMAIL PROTECTED] ___ Flightgear-devel mailing list Flightgear-devel@flightgear.org http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
Re: [Flightgear-devel] Re: Speed of CVS version and flying in the Himalayas
Hi,
On Donnerstag 26 Mai 2005 15:10, Melchior FRANZ wrote:
> 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.
Hmm, that did not for me ...
But with the attached patch it did, at least for me ... ?!!
> > 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.)
Does this attached patch help for you?
Greetings
Mathias
--
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Index: src/Scenery/hitlist.cxx
===
RCS file: /var/cvs/FlightGear-0.9/source/src/Scenery/hitlist.cxx,v
retrieving revision 1.11
diff -u -r1.11 hitlist.cxx
--- src/Scenery/hitlist.cxx 26 May 2005 08:13:06 - 1.11
+++ src/Scenery/hitlist.cxx 26 May 2005 13:45:38 -
@@ -124,20 +124,23 @@
{
sgdVec3 dif;
+// Some tolerance in meters we accept a point to be outside of the triangle
+// and still return that it is inside.
+SGDfloat eps = 1e-4;
SGDfloat min, max;
// punt if outside bouding cube
SG_MIN_MAX3 ( min, max, tri[0][0], tri[1][0], tri[2][0] );
-if( (point[0] < min) || (point[0] > max) )
+if( (point[0] < min - eps) || (point[0] > max + eps) )
return false;
dif[0] = max - min;
SG_MIN_MAX3 ( min, max, tri[0][1], tri[1][1], tri[2][1] );
-if( (point[1] < min) || (point[1] > max) )
+if( (point[1] < min - eps) || (point[1] > max + eps) )
return false;
dif[1] = max - min;
SG_MIN_MAX3 ( min, max, tri[0][2], tri[1][2], tri[2][2] );
-if( (point[2] < min) || (point[2] > max) )
+if( (point[2] < min - eps) || (point[2] > max + eps) )
return false;
dif[2] = max - min;
@@ -181,27 +184,30 @@
}
// check if intersection point is on the same side of p1 <-> p2 as p3
-SGDfloat tmp = (y2 - y3) / (x2 - x3);
-int side1 = SG_SIGN (tmp * (rx - x3) + y3 - ry);
-int side2 = SG_SIGN (tmp * (x1 - x3) + y3 - y1);
+SGDfloat tmp = (y2 - y3);
+SGDfloat tmpn = (x2 - x3);
+int side1 = SG_SIGN (tmp * (rx - x3) + (y3 - ry) * tmpn);
+int side2 = SG_SIGN (tmp * (x1 - x3) + (y3 - side1*eps - y1) * tmpn);
if ( side1 != side2 ) {
// printf("failed side 1 check\n");
return false;
}
// check if intersection point is on correct side of p2 <-> p3 as p1
-tmp = (y3 - ry) / (x3 - rx);
-side1 = SG_SIGN (tmp * (x2 - rx) + ry - y2);
-side2 = SG_SIGN (tmp * (x1 - rx) + ry - y1);
+tmp = (y3 - ry);
+tmpn = (x3 - rx);
+side1 = SG_SIGN (tmp * (x2 - rx) + (ry - y2) * tmpn);
+side2 = SG_SIGN (tmp * (x1 - rx) + (ry - side1*eps - y1) * tmpn);
if ( side1 != side2 ) {
// printf("failed side 2 check\n");
return false;
}
// check if intersection point is on correct side of p1 <-> p3 as p2
-tmp = (y2 - ry) / (x2 - rx);
-side1 = SG_SIGN (tmp * (x3 - rx) + ry - y3);
-side2 = SG_SIGN (tmp * (x1 - rx) + ry - y1);
+tmp = (y2 - ry);
+tmpn = (x2 - rx);
+side1 = SG_SIGN (tmp * (x3 - rx) + (ry - y3) * tmpn);
+side2 = SG_SIGN (tmp * (x1 - rx) + (ry - side1*eps - y1) * tmpn);
if ( side1 != side2 ) {
// printf("failed side 3 check\n");
return false;
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Re: [Flightgear-devel] Re: Speed of CVS version and flying in the Himalayas
On Donnerstag 26 Mai 2005 12:37, Melchior FRANZ wrote: > Hey! I update & compile in the same minute a new cvs-log commit message > comes in if I'm at my computer. Yes, this happens with CVS/HEAD as of *now* > (Thu May 26 12:36:12 CEST 2005). I had tried it as soon as I saw the fix > because I had *hoped* that it would fix it. :) Sorry ... Can you send me a location where it does not work? I have something in my tree which could help, if the problem is at the point I expecte it to be ... Greetings Mathias -- Mathias Fröhlich, email: [EMAIL PROTECTED] ___ Flightgear-devel mailing list Flightgear-devel@flightgear.org http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
Re: [Flightgear-devel] Re: Speed of CVS version and flying in the Himalayas
On Donnerstag 26 Mai 2005 12:21, Melchior FRANZ wrote:
> Unfortunately, a similar bug showed up recently for *bucket* boundaries.
> If you set /position/{latitude,longitude}-deg to a bucket boundary, fgfs
> refuses to set /position/elevation-m accordingly. It simply lets the old
> elevation in the property system. Annoying for scripts that read out
> elevation. (I work around that by adding 0.0001 now in [1]). :-(
From what you tell, this might be fixed with the change to hitlist.cxx from
today morning.
Have you retried with this recent version?
Greetings
Mathias
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Re: [Flightgear-devel] Re: Speed of CVS version and flying in the Himalayas
On Dienstag 03 Mai 2005 14:17, Melchior FRANZ wrote: > > > Try adding --log-level=info for a possible hint, > > > > ./fgfs --lat=87 --long=28 --altitude=3 --log-level=info > > That's an old, well known bug. If you position fgfs exactly on the tile > boundaries (*integer* lon/lat), the intersection code somehow falls through > between the tiles. Try this: > > > $ ./fgfs --lat=87.001 --long=28.001 --altitude=3 > > > I wouldn't be surprised if someone fixed that bug within ... the next > twenty years? ;-) Is fixed now in current cvs ... Mathias -- Mathias Fröhlich, email: [EMAIL PROTECTED] ___ Flightgear-devel mailing list Flightgear-devel@flightgear.org http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
Re: [Flightgear-devel] Re: Speed of CVS version and flying in theHimalayas
On Wed, 04 May 2005 11:26:54 +0200, Paul wrote in message <[EMAIL PROTECTED]>: > On Tue, 2005-05-03 at 22:13 -0400, Chris Metzler wrote: > > On Tue, 03 May 2005 23:59:15 +0200 > > Paul Furber wrote: > > > > > > Flying WNW towards the summit in the Cessna. > > > > How in the world did you get the Cessna up there! > > >From the command line :] > fgfs --lat=87.001 --lon=28.001 --altitude=31000 ..it needs airspeed too, try ' --vc=130 ' and full power. > The plane stalled and then as it recovered I paused and snapped the > screenshot. You can see the instruments haven't settled down yet and > the throttle is at idle. > Interestingly the Cessna *does* fly quite nicely at that altitude but > the F-16 just drops out of the sky in a flat spin (for me anyway). ..it should sink towards a coupla thousand feet above the service ceiling, which usually is defined as the altitude where ROC drops below 50 (or 100?) fpm. -- ..med vennlig hilsen = with Kind Regards from Arnt... ;o) ...with a number of polar bear hunters in his ancestry... Scenarios always come in sets of three: best case, worst case, and just in case. ___ Flightgear-devel mailing list Flightgear-devel@flightgear.org http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
Re: [Flightgear-devel] Re: Speed of CVS version and flying in theHimalayas
On Tue, 2005-05-03 at 22:13 -0400, Chris Metzler wrote: > On Tue, 03 May 2005 23:59:15 +0200 > Paul Furber wrote: > > > > Flying WNW towards the summit in the Cessna. > > How in the world did you get the Cessna up there! >From the command line :] fgfs --lat=87.001 --lon=28.001 --altitude=31000 The plane stalled and then as it recovered I paused and snapped the screenshot. You can see the instruments haven't settled down yet and the throttle is at idle. Interestingly the Cessna *does* fly quite nicely at that altitude but the F-16 just drops out of the sky in a flat spin (for me anyway). -- Paul Furber <[EMAIL PROTECTED]> ex tenebris lux, ex fenestris tux -- ___ Flightgear-devel mailing list Flightgear-devel@flightgear.org http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
Re: [Flightgear-devel] Re: Speed of CVS version and flying in
Adam Dershowitz wrote: > I hope you were using Oxygen (for you and the engine!) Well >> From: Paul Furber <[EMAIL PROTECTED]> [...] >> http://www.paulfurberconsulting.com/images/fgfs-everest-1.jpg The engine is already dead, the artificial horizon is terribly sick, the variometer indicates a 2000 ft/min climb - only the speed indicator and the turn coordinator appear to have 'survived' this ride :-) Martin. -- Unix _IS_ user friendly - it's just selective about who its friends are ! -- ___ Flightgear-devel mailing list Flightgear-devel@flightgear.org http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
Re: [Flightgear-devel] Re: Speed of CVS version and flying in theHimalayas
On Tue, 3 May 2005 22:13:40 -0400, Chris wrote in message <[EMAIL PROTECTED]>: > On Tue, 03 May 2005 23:59:15 +0200 > Paul Furber wrote: > > > > Flying WNW towards the summit in the Cessna. > > How in the world did you get the Cessna up there! ..^U^U^U^U^U^U^U^U^U^U^U^U^U^U^U^U^U^U^U^U ;o) -- ..med vennlig hilsen = with Kind Regards from Arnt... ;o) ...with a number of polar bear hunters in his ancestry... Scenarios always come in sets of three: best case, worst case, and just in case. ___ Flightgear-devel mailing list Flightgear-devel@flightgear.org http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
Re: [Flightgear-devel] Re: Speed of CVS version and flying in theHimalayas
On Tue, 03 May 2005 23:59:15 +0200 Paul Furber wrote: > > Flying WNW towards the summit in the Cessna. How in the world did you get the Cessna up there! -c -- Chris Metzler [EMAIL PROTECTED] (remove "snip-me." to email) "As a child I understood how to give; I have forgotten this grace since I have become civilized." - Chief Luther Standing Bear pgp01G1H2JOMu.pgp Description: PGP signature ___ Flightgear-devel mailing list Flightgear-devel@flightgear.org http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
Re: [Flightgear-devel] Re: Speed of CVS version and flying in theHimalayas
I hope you were using Oxygen (for you and the engine!) -- Adam > From: Paul Furber <[EMAIL PROTECTED]> > Reply-To: FlightGear developers discussions > Date: Tue, 03 May 2005 23:59:15 +0200 > To: FlightGear developers discussions > Subject: Re: [Flightgear-devel] Re: Speed of CVS version and flying in > theHimalayas > > On Tue, 2005-05-03 at 14:46 -0400, Ampere K. Hardraade wrote: >> On May 3, 2005 01:52 pm, Paul Furber wrote: >>> Thanks - I did have it the right way around when running it - just typed >>> it in wrong in the previous e-mail. I've just downloaded the e080n20 >>> tileset and there now seems to be a large peak of ~29 000ft on the >>> China/Nepal border :] >> >> Some screenshots will be nice. > > Ask and ye shall receive: > > Flying WNW towards the summit in the Cessna. The SouthEast ridge slopes > away to the right and in the saddle on the far right is the top of the > Lhotse face. > http://www.paulfurberconsulting.com/images/fgfs-everest-1.jpg > > An external view: > http://www.paulfurberconsulting.com/images/fgfs-everest-2.jpg > > -- > Paul Furber <[EMAIL PROTECTED]> > ex tenebris lux, ex fenestris tux > -- > > > ___ > Flightgear-devel mailing list > Flightgear-devel@flightgear.org > http://mail.flightgear.org/mailman/listinfo/flightgear-devel > 2f585eeea02e2c79d7b1d8c4963bae2d ___ Flightgear-devel mailing list Flightgear-devel@flightgear.org http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
Re: [Flightgear-devel] Re: Speed of CVS version and flying in theHimalayas
On Tue, 2005-05-03 at 23:59 +0200, Paul Furber wrote: > Ask and ye shall receive: > > Flying WNW towards the summit in the Cessna. Er, that should be NNE... -- Paul Furber <[EMAIL PROTECTED]> ex tenebris lux, ex fenestris tux -- ___ Flightgear-devel mailing list Flightgear-devel@flightgear.org http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
Re: [Flightgear-devel] Re: Speed of CVS version and flying in theHimalayas
On Tue, 2005-05-03 at 14:46 -0400, Ampere K. Hardraade wrote: > On May 3, 2005 01:52 pm, Paul Furber wrote: > > Thanks - I did have it the right way around when running it - just typed > > it in wrong in the previous e-mail. I've just downloaded the e080n20 > > tileset and there now seems to be a large peak of ~29 000ft on the > > China/Nepal border :] > > Some screenshots will be nice. Ask and ye shall receive: Flying WNW towards the summit in the Cessna. The SouthEast ridge slopes away to the right and in the saddle on the far right is the top of the Lhotse face. http://www.paulfurberconsulting.com/images/fgfs-everest-1.jpg An external view: http://www.paulfurberconsulting.com/images/fgfs-everest-2.jpg -- Paul Furber <[EMAIL PROTECTED]> ex tenebris lux, ex fenestris tux -- ___ Flightgear-devel mailing list Flightgear-devel@flightgear.org http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
Re: [Flightgear-devel] Re: Speed of CVS version and flying in theHimalayas
On May 3, 2005 01:52 pm, Paul Furber wrote: > Thanks - I did have it the right way around when running it - just typed > it in wrong in the previous e-mail. I've just downloaded the e080n20 > tileset and there now seems to be a large peak of ~29 000ft on the > China/Nepal border :] Some screenshots will be nice. Ampere ___ Flightgear-devel mailing list Flightgear-devel@flightgear.org http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
Re: [Flightgear-devel] Re: Speed of CVS version and flying in theHimalayas
On Tue, 2005-05-03 at 11:22 -0600, Phil Cazzola wrote: > I wasn't sure if you figured this out: > > Lat=87 and Long=28 would be a polar location, somewhere north of Murmansk. > > Lat =28 and Long=87 is on the China/Nepal border Thanks - I did have it the right way around when running it - just typed it in wrong in the previous e-mail. I've just downloaded the e080n20 tileset and there now seems to be a large peak of ~29 000ft on the China/Nepal border :] -- Paul Furber <[EMAIL PROTECTED]> ex tenebris lux, ex fenestris tux -- ___ Flightgear-devel mailing list Flightgear-devel@flightgear.org http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
Re: [Flightgear-devel] Re: Speed of CVS version and flying in theHimalayas
- Original Message -
From: "Paul Furber" <[EMAIL PROTECTED]>
To: "FlightGear developers discussions"
Sent: Tuesday, May 03, 2005 7:00 AM
Subject: Re: [Flightgear-devel] Re: Speed of CVS version and flying in
theHimalayas
On Tue, 2005-05-03 at 14:17 +0200, Melchior FRANZ wrote:
That's an old, well known bug. If you position fgfs exactly on the tile
boundaries
(*integer* lon/lat), the intersection code somehow falls through between
the
tiles. Try this:
$ ./fgfs --lat=87.001 --long=28.001 --altitude=3
Thanks - this worked a treat. I'm now flying at 32000 feet over the
breathtaking, er, sea. Oops - looks like I picked the wrong tile set :)
I wasn't sure if you figured this out:
Lat=87 and Long=28 would be a polar location, somewhere north of Murmansk.
Lat =28 and Long=87 is on the China/Nepal border
--
Paul Furber <[EMAIL PROTECTED]>
ex tenebris lux, ex fenestris tux
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Re: [Flightgear-devel] Re: Speed of CVS version and flying in the Himalayas
On Tue, 2005-05-03 at 14:17 +0200, Melchior FRANZ wrote: > That's an old, well known bug. If you position fgfs exactly on the tile > boundaries > (*integer* lon/lat), the intersection code somehow falls through between the > tiles. Try this: > > > $ ./fgfs --lat=87.001 --long=28.001 --altitude=3 > Thanks - this worked a treat. I'm now flying at 32000 feet over the breathtaking, er, sea. Oops - looks like I picked the wrong tile set :) > I wouldn't be surprised if someone fixed that bug within ... the next twenty > years? ;-) I feel an itch coming on... -- Paul Furber <[EMAIL PROTECTED]> ex tenebris lux, ex fenestris tux -- ___ Flightgear-devel mailing list Flightgear-devel@flightgear.org http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
Re: [Flightgear-devel] Re: Speed of CVS version and flying in the Himalayas
Quoting Paul Furber: > On Tue, 2005-05-03 at 13:26 +0200, Melchior FRANZ wrote: > > * Paul Furber -- Tuesday 03 May 2005 12:50: > > > it's just the Himalayas region which doesn't work. (doesn't work on 0.9.8 > > > either) I'm running CVS versions from last night on amd64 Gentoo Linux. > > > Any ideas? > > > > No. If you had posted a command line that exposes the problem, *hundreds* > > of fgfs developers would have tried to reproduce it, and maybe would have > > been able to reproduce it and to find a solution. But so ... > > *Smacks forehead* - ask smart questions idiot! Sorry about that - I'll > be more informative in future :) > > > Try adding --log-level=info for a possible hint, > > ./fgfs --lat=87 --long=28 --altitude=3 --log-level=info Classical numerical problem at tile boundary. Try that instead : ./fgfs --lat=87.0001 --long=28.0001 --altitude=3 -Fred ___ Flightgear-devel mailing list Flightgear-devel@flightgear.org http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
Re: [Flightgear-devel] Re: Speed of CVS version and flying in the Himalayas
On Tue, 2005-05-03 at 13:26 +0200, Melchior FRANZ wrote: > * Paul Furber -- Tuesday 03 May 2005 12:50: > > it's just the Himalayas region which doesn't work. (doesn't work on 0.9.8 > > either) I'm running CVS versions from last night on amd64 Gentoo Linux. > > Any ideas? > > No. If you had posted a command line that exposes the problem, *hundreds* > of fgfs developers would have tried to reproduce it, and maybe would have > been able to reproduce it and to find a solution. But so ... *Smacks forehead* - ask smart questions idiot! Sorry about that - I'll be more informative in future :) > Try adding --log-level=info for a possible hint, ./fgfs --lat=87 --long=28 --altitude=3 --log-level=info seems to initialise everything, including the splash screen, then gets stuck in the terrain loading. I get thousands of: no terrain intersection messages interspersed with: Updating Sun position Gst = 0.824526 t->cur_time = 1115114851 Sun Geodetic lat = 0.275179 Geocentric lat = 0.273428 sun angle relative to current location = 1.24501 Updating Moon position t->cur_time = 1115114851 Moon Geodetic lat = -0.184198 Geocentric lat = -0.182992 moon angle relative to current location = 1.7246 Updating light parameters. Sun angle = 71.3338 ambient = 0.2 diffuse = 0.968597 specular = 0.5 sky = 0.953064 Corrupt scenery data perhaps? -- Paul Furber <[EMAIL PROTECTED]> ex tenebris lux, ex fenestris tux -- ___ Flightgear-devel mailing list Flightgear-devel@flightgear.org http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
