[Flightgear-devel] scenery appearance depends on camera tilt angle

2010-03-11 Thread John Denker
What steps will reproduce the problem?

--lat=37.637855 --lon=-122.414915 --altitude=656 --heading=113 --fdm=ufo

aircraft is stopped.  zero airspeed, zero rate of turn, etc.

The choice of aircraft doesn't seem to matter;  this is 100%
reproducible chez moi using the default c172p, the pa24-250,
et cetera.

Zoom in the view;  FoV 15.5 will do; 12.5 is better; 7.7 is
even better, if you have good control of the pitch/tilt and 
view angle.

Change the view angle, either by pitching the entire aircraft
or by simply tilting the pilot's view angle relative to the
aircraft.

What is the expected output? 

Scenery should not change.  The ray from each object to the
camera image plane should stay the same, except to move to
a different point in the image plane, when the camera is
tilted.

What do you see instead?

For some tilt angles, the taxiway signs alongside taxiway
charlie are dark, while at other title angles they are
lit.
  http://www.av8n.com/fly/fgfs/img48/taxi-signs-off.png
  http://www.av8n.com/fly/fgfs/img48/taxi-signs-on.png

I cannot imagine what could be causing this.

==

The same phenomenon is seen during normal flight, but is
harder to reproduce and document.


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Re: [Flightgear-devel] scenery appearance depends on camera tilt angle

2010-03-11 Thread Heiko Schulz

 What steps will reproduce the
 problem?
 
 --lat=37.637855 --lon=-122.414915 --altitude=656
 --heading=113 --fdm=ufo
 
 aircraft is stopped.  zero airspeed, zero rate of
 turn, etc.
 
 The choice of aircraft doesn't seem to matter;  this
 is 100%
 reproducible chez moi using the default c172p, the
 pa24-250,
 et cetera.
 
 Zoom in the view;  FoV 15.5 will do; 12.5 is better;
 7.7 is
 even better, if you have good control of the pitch/tilt and
 
 view angle.
 
 Change the view angle, either by pitching the entire
 aircraft
 or by simply tilting the pilot's view angle relative to
 the
 aircraft.
 
 What is the expected output? 
 
 Scenery should not change.  The ray from each object
 to the
 camera image plane should stay the same, except to move to
 a different point in the image plane, when the camera is
 tilted.
 
 What do you see instead?
 
 For some tilt angles, the taxiway signs alongside taxiway
 charlie are dark, while at other title angles they are
 lit.
   http://www.av8n.com/fly/fgfs/img48/taxi-signs-off.png
   http://www.av8n.com/fly/fgfs/img48/taxi-signs-on.png
 
 I cannot imagine what could be causing this.
 
 ==
 
 The same phenomenon is seen during normal flight, but is
 harder to reproduce and document.

Wel,, I would see this as a bug, if the frontside with the letter can't be read 
then anymore. But your pics shows it can bes till, it is just the backside 
which changes the color. 

Not a serious bug or showstopper for

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Re: [Flightgear-devel] scenery appearance depends on camera tilt angle

2010-03-11 Thread David Megginson
On Thu, Mar 11, 2010 at 4:47 PM, Heiko Schulz aeitsch...@yahoo.de wrote:

 Wel,, I would see this as a bug, if the frontside with the letter can't be 
 read then anymore. But your pics shows it can bes till, it is just the 
 backside which changes the color.

 Not a serious bug or showstopper for

FWIW, when I'm flying, I see the shading on the scenery change
drastically during the flight as the plane turns and pitches.  I think
what's happened is instead of just changing the shading on the panel,
we're changing the shading on the scenery too.  FGFS didn't used to do
that, so it's a relatively recent introduction.


All the best,


David

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Re: [Flightgear-devel] scenery appearance depends on camera tilt angle

2010-03-11 Thread Heiko Schulz
Hi,
 
 FWIW, when I'm flying, I see the shading on the scenery
 change
 drastically during the flight as the plane turns and
 pitches.  I think
 what's happened is instead of just changing the shading on
 the panel,
 we're changing the shading on the scenery too.  FGFS
 didn't used to do
 that, so it's a relatively recent introduction.
 
 
 All the best,
 
 
 David
 

Now I understand- the whole scenery! (But THIS John never mentioned)
And he had should wrote, that shaders are disabled.

That's the cause of the bug I guess- when shaders disabled the shading is 
changed. That's something really noticeable above the sea or a lake. 
And yes, as we offer FGFS for using without shaders as well, it is a bug. 

Heiko

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Re: [Flightgear-devel] scenery appearance depends on camera tilt angle

2010-03-11 Thread Tim Moore
On Thu, Mar 11, 2010 at 10:26 PM, John Denker j...@av8n.com wrote:
...


 Change the view angle, either by pitching the entire aircraft
 or by simply tilting the pilot's view angle relative to the
 aircraft.

 What is the expected output?

 Scenery should not change.  The ray from each object to the
 camera image plane should stay the same, except to move to
 a different point in the image plane, when the camera is
 tilted.

 What do you see instead?

 For some tilt angles, the taxiway signs alongside taxiway
 charlie are dark, while at other title angles they are
 lit.
  http://www.av8n.com/fly/fgfs/img48/taxi-signs-off.png
  http://www.av8n.com/fly/fgfs/img48/taxi-signs-on.png

 I cannot imagine what could be causing this.

 The mesh representing the back of a sign is not complete; graphics state
from other parts of the scenery are leaking into it. The particular effect
depends on the global draw order, which does change as your viewing angle
changes.

I don't know why this ever worked. What color are the sign backs supposed to
be?

Tim
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Re: [Flightgear-devel] scenery appearance depends on camera tilt angle

2010-03-11 Thread Csaba Halász
On Thu, Mar 11, 2010 at 10:26 PM, John Denker j...@av8n.com wrote:

 For some tilt angles, the taxiway signs alongside taxiway
 charlie are dark, while at other title angles they are
 lit.

Not that it matters but I have reported this issue already:
http://www.mail-archive.com/flightgear-devel@lists.sourceforge.net/msg25180.html
Okay so maybe the bug tracker is a good idea :)

-- 
Csaba/Jester

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[Flightgear-devel] To Pause FlightGear Instance using sockets

2010-03-11 Thread Aryabrata Basu
Hello All,

I am a FlightGear user and I have written a program that communicates with
the FlightGear using UDP sockets.

Now, I was wondering if one can pause the FlightGear instance without using
the pause button 'P' via sockets while communicating with the FlightGear
instance.

Thanks,
-- Arya.
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Re: [Flightgear-devel] instrument patches

2010-03-11 Thread syd adams
Hello James ,
I just updated your commits and tested , thanks.
But I see another issue that bothers me ... originally I didnt initialize
the parameters UNLESS the airspeed indicator had an overspeed needle ...
 but now even without , the alt-threshold , ias-limit ,and mach-limit are
visible .
That seems unneccesary , and confusing , and the reason I did it the way I
did. I'd prefer them to not be there unless needed , unless someone can see
a reason they should, that Ive overlooked .
Cheers
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