Re: [Flightgear-devel] FlightGear-0.9.11-pre1-------Carriers are Flying

2007-05-18 Thread Richard Bytheway
 Martin Spott wrote:
  gh.robin wrote:
  
  With FlightGear-0.9.11-pre1  it is something strange  
  we have Flying Carriers.
  
  The carrier is correct - sea level is wrong  :-))
 
 Wait for the tide to come in.
 
 Jon
 
I presume this is to do with the fact that the sea is modelled as a few
huge flat polys whose surfaces have a significant altitude change
between the centres and the vertices. 

AFAIK this has not changed since the very early days of FG, but since we
now all have graphics cards that are 2-3 orders of magnitude faster than
when FG started, is now the time to increase the number of polys in the
ocean? A reduction in the edge length of a factor of 3 would reduce the
surface height variation by a factor of ~3, and increase the poly count
in the ocean by a factor of 9, which I believe should be acceptable.

Unfortunately, I have no idea where so start poking around in the
codebase to do this though.

Richard

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Re: [Flightgear-devel] FlightGear-0.9.11-pre1-------Carriers are Flying

2007-05-18 Thread Tim Moore
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Hash: SHA1

Richard Bytheway wrote:
 Martin Spott wrote:
 gh.robin wrote:

 With FlightGear-0.9.11-pre1  it is something strange  
 we have Flying Carriers.
 The carrier is correct - sea level is wrong  :-))
 Wait for the tide to come in.

 Jon

 I presume this is to do with the fact that the sea is modelled as a few
 huge flat polys whose surfaces have a significant altitude change
 between the centres and the vertices. 
Try one quad per tile :P

 
 AFAIK this has not changed since the very early days of FG, but since we
 now all have graphics cards that are 2-3 orders of magnitude faster than
 when FG started, is now the time to increase the number of polys in the
 ocean? A reduction in the edge length of a factor of 3 would reduce the
 surface height variation by a factor of ~3, and increase the poly count
 in the ocean by a factor of 9, which I believe should be acceptable.
 
 Unfortunately, I have no idea where so start poking around in the
 codebase to do this though.
In the OSG tree, SGGenTile() in simgear/scene/tgb/obj.cxx.

Tim

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Re: [Flightgear-devel] FlightGear-0.9.11-pre1-------Carriers are Flying

2007-05-17 Thread George Patterson
On Thu, 2007-05-17 at 03:10 +0200, gh.robin wrote:
 
 
 
 Hello,
 
 With FlightGear-0.9.11-pre1  it is something strange  
 we have Flying Carriers.
 
 Here snapshots
 
 http://perso.orange.fr/GRTux/Carrier-Flying1.jpg
 http://perso.orange.fr/GRTux/Carrier-Flying2.jpg
 http://perso.orange.fr/GRTux/Carrier-Flying3.jpg
 
 Regards
 

Not quite Sky Captain and the World of Tomorrow but getting closer. :-)

Regards


George


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Re: [Flightgear-devel] FlightGear-0.9.11-pre1----- --Carriers are Flying

2007-05-17 Thread gh.robin
On Thu 17 May 2007 12:40, George Patterson wrote:
 On Thu, 2007-05-17 at 03:10 +0200, gh.robin wrote:
  Hello,
 
  With FlightGear-0.9.11-pre1  it is something strange
  we have Flying Carriers.
 
  Here snapshots
 
  http://perso.orange.fr/GRTux/Carrier-Flying1.jpg
  http://perso.orange.fr/GRTux/Carrier-Flying2.jpg
  http://perso.orange.fr/GRTux/Carrier-Flying3.jpg
 
  Regards

 Not quite Sky Captain and the World of Tomorrow but getting closer. :-)

 Regards


 George

Could be a joke unfortunately it is not.

It has been checked, that is not an offset error within the 3D model 
definition.

I guess, It is a zero level  calculation bug regarding moving models (AI) on 
the sea.

Regards

-- 
Gérard


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Re: [Flightgear-devel] FlightGear-0.9.11-pre1-------Carriers are Flying

2007-05-17 Thread Martin Spott
gh.robin wrote:

 With FlightGear-0.9.11-pre1  it is something strange  
 we have Flying Carriers.

The carrier is correct - sea level is wrong  :-))

Martin.
P.S.: Just a joke 
-- 
 Unix _IS_ user friendly - it's just selective about who its friends are !
--

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Re: [Flightgear-devel] FlightGear-0.9.11-pre1-------Carriers are Flying

2007-05-17 Thread Curtis Olson

On 5/17/07, gh.robin wrote:


On Thu 17 May 2007 12:40, George Patterson wrote:
 On Thu, 2007-05-17 at 03:10 +0200, gh.robin wrote:
  Hello,
 
  With FlightGear-0.9.11-pre1  it is something strange
  we have Flying Carriers.
 
  Here snapshots
 
  http://perso.orange.fr/GRTux/Carrier-Flying1.jpg
  http://perso.orange.fr/GRTux/Carrier-Flying2.jpg
  http://perso.orange.fr/GRTux/Carrier-Flying3.jpg
 
  Regards

 Not quite Sky Captain and the World of Tomorrow but getting closer. :-)

 Regards


 George

Could be a joke unfortunately it is not.

It has been checked, that is not an offset error within the 3D model
definition.

I guess, It is a zero level  calculation bug regarding moving models (AI)
on
the sea.

Regards

--
Gérard




It would be great if someone involved in this aspect of the code would be
willing to dig in and figure out the problem before the final/official
0.9.11 release.  My worry is that if there are not enough developers
concerned about these sorts of problems, we will not have a very good
release experience this time around.

I do know that the ground intersection code is completely different between
OSG and PLIB so something must have fallen through the cracks on the plib
side.

Thanks,

Curt.
--
Curtis Olson - University of Minnesota - FlightGear Project
http://baron.flightgear.org/~curt/  http://www.humanfirst.umn.edu/
http://www.flightgear.org
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Re: [Flightgear-devel] FlightGear-0.9.11-pre1-------Carriers are Flying

2007-05-17 Thread Jon Stockill
Martin Spott wrote:
 gh.robin wrote:
 
 With FlightGear-0.9.11-pre1  it is something strange  
 we have Flying Carriers.
 
 The carrier is correct - sea level is wrong  :-))

Wait for the tide to come in.

Jon

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[Flightgear-devel] FlightGear-0.9.11-pre1-------Carriers are Flying

2007-05-16 Thread gh.robin




Hello,

With FlightGear-0.9.11-pre1  it is something strange  
we have Flying Carriers.

Here snapshots

http://perso.orange.fr/GRTux/Carrier-Flying1.jpg
http://perso.orange.fr/GRTux/Carrier-Flying2.jpg
http://perso.orange.fr/GRTux/Carrier-Flying3.jpg

Regards

-- 
Gérard


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