Re: [Flightgear-devel] Golden Gate Bridge

2003-07-15 Thread Curtis L. Olson
James Turner writes:
 Yes, it looks great. However, it has unearthed a *serious* (ahem) issue 
 with the collision detection logic.
 
 You can't fly under the bridge. I tried it once, in the airbus, and 
 figured i'd clipped the tail on the road deck, but I just tried again 
 with the 747, and was definitely well clear this time.

Most high end commercial sims explicitly prevent flying under bridges.
It's one of the first things most people think to try, but it's not
something a serious training sim would want to encourage.

Curt.
-- 
Curtis Olson   IVLab / HumanFIRST Program   FlightGear Project
Twin Citiescurt 'at' me.umn.edu curt 'at' flightgear.org
Minnesota  http://www.menet.umn.edu/~curt   http://www.flightgear.org

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Re: [Flightgear-devel] Golden Gate Bridge

2003-07-15 Thread Lee Elliott
On Tuesday 15 July 2003 15:34, Curtis L. Olson wrote:
 James Turner writes:
  Yes, it looks great. However, it has unearthed a *serious* (ahem) issue 
  with the collision detection logic.
  
  You can't fly under the bridge. I tried it once, in the airbus, and 
  figured i'd clipped the tail on the road deck, but I just tried again 
  with the 747, and was definitely well clear this time.
 
 Most high end commercial sims explicitly prevent flying under bridges.
 It's one of the first things most people think to try, but it's not
 something a serious training sim would want to encourage.
 
 Curt.
 -- 
 Curtis Olson   IVLab / HumanFIRST Program   FlightGear Project
 Twin Citiescurt 'at' me.umn.edu curt 'at' flightgear.org
 Minnesota  http://www.menet.umn.edu/~curt   http://www.flightgear.org

You can actually fly between the suspension chains although the towers are 
pretty solid;)

LeeE


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Re: [Flightgear-devel] Golden Gate Bridge

2003-07-15 Thread Curtis L. Olson
David Megginson writes:
 Curtis L. Olson writes:
 
   Most high end commercial sims explicitly prevent flying under
   bridges.  It's one of the first things most people think to try,
   but it's not something a serious training sim would want to
   encourage.
 
 That sounds fairly reasonable.  However, as SimGear and TerraGear
 evolve towards general vehicle simulation, we will want to allow cars,
 boats, and trains to pass under bridges.

It should be pretty easy to get this behavior.  When you get the list
of terrain intersection points, just ignore any points that are higher
than you, and accept the highest point that is at or below the current
vehicle elevation.  I thought this was the way we had it working years
ago, but that section of the code has been optimized several times
since then ...

Regards,

Curt.
-- 
Curtis Olson   IVLab / HumanFIRST Program   FlightGear Project
Twin Citiescurt 'at' me.umn.edu curt 'at' flightgear.org
Minnesota  http://www.menet.umn.edu/~curt   http://www.flightgear.org

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Re: [Flightgear-devel] Golden Gate Bridge

2003-07-15 Thread David Megginson
Curtis L. Olson writes:

  Most high end commercial sims explicitly prevent flying under
  bridges.  It's one of the first things most people think to try,
  but it's not something a serious training sim would want to
  encourage.

That sounds fairly reasonable.  However, as SimGear and TerraGear
evolve towards general vehicle simulation, we will want to allow cars,
boats, and trains to pass under bridges.


All the best,


David

-- 
David Megginson, [EMAIL PROTECTED], http://www.megginson.com/

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Re: [Flightgear-devel] Golden Gate Bridge

2003-07-15 Thread [EMAIL PROTECTED]
  You can't fly under the bridge. I tried it once, in the airbus, and
  figured i'd clipped the tail on the road deck, but I just tried again
  with the 747, and was definitely well clear this time.

 Most high end commercial sims explicitly prevent flying under bridges.
 It's one of the first things most people think to try, but it's not
 something a serious training sim would want to encourage.

 Curt.

Could you add the feature to fly under bridges?
I prefer having a realistic simulator that allows everthing instead of a 
simulator that is baby sitting me.

Best Regards,
 Oliver C.



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Re: [Flightgear-devel] Golden Gate Bridge

2003-07-15 Thread Arnt Karlsen
On Tue, 15 Jul 2003 21:04:05 +0100, 
Lee Elliott [EMAIL PROTECTED] wrote in message 
[EMAIL PROTECTED]:

 On Tuesday 15 July 2003 15:34, Curtis L. Olson wrote:
  James Turner writes:
   Yes, it looks great. However, it has unearthed a *serious* (ahem)
   issue with the collision detection logic.
   
   You can't fly under the bridge. I tried it once, in the airbus,
   and figured i'd clipped the tail on the road deck, but I just
   tried again with the 747, and was definitely well clear this time.
  
  Most high end commercial sims explicitly prevent flying under
  bridges. It's one of the first things most people think to try, but
  it's not something a serious training sim would want to encourage.
  
 
 You can actually fly between the suspension chains although the towers
 are pretty solid;)

..assuming your is aim _good_ and your plane is small enough, 
I believe you can in RL too.  ;-)

-- 
..med vennlig hilsen = with Kind Regards from Arnt... ;-)
...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.



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[Flightgear-devel] Golden Gate Bridge

2003-07-13 Thread Frederic Bouvier
A new bridge, the famoust, is in CVS :
http://perso.wanadoo.fr/frbouvi/flightsim/fgfs-golden-gate-01.png

-Fred



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re: [Flightgear-devel] Golden Gate Bridge

2003-07-13 Thread David Megginson
Frederic Bouvier writes:

  A new bridge, the famoust, is in CVS :
  http://perso.wanadoo.fr/frbouvi/flightsim/fgfs-golden-gate-01.png

Gorgeous!  I've been waiting for this one for a long time -- Marin
County looked so lonely sitting there with no link to SF.

Does anyone want to put a static model of a freighter steaming under it?


All the best,


David

-- 
David Megginson, [EMAIL PROTECTED], http://www.megginson.com/

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Re: [Flightgear-devel] Golden Gate Bridge

2003-07-13 Thread WillyB
On Sunday 13 July 2003 12:25, David Megginson wrote:
 Frederic Bouvier writes:
   A new bridge, the famoust, is in CVS :
   http://perso.wanadoo.fr/frbouvi/flightsim/fgfs-golden-gate-01.png

 Gorgeous!  I've been waiting for this one for a long time -- Marin
 County looked so lonely sitting there with no link to SF.


I agree, that looks Great!
I've been waiting to see it as wll :)
WillyB

 Does anyone want to put a static model of a freighter steaming under it?


 All the best,


 David


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RE: [Flightgear-devel] Golden Gate Bridge

2003-07-13 Thread Norman Vine
James Turner writes:

 Another thing to consider is the flip-side - being able to taxi *on*
 bridges,

You can do this in FGFS now
You just can't fly lower then the highest point at any location

 I don't know how much collision detection SSG handles,

SSG doesn't do collision detection period, SSG does do HOT
 height over terrain  but this is almost a diirect copy of what
I worked out for FlightGear

If you want collision not HOT I suggest you look into integrating
'ode' or 'opcode' into FlightGear
http://opende.sourceforge.net/ode-collision-porting.html
http://www.codercorner.com/Opcode.htm

Note
http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/plib/plib/demos/ode_demo/Attic/simple.cpp?rev=1.1content-type=text/vnd.viewcvs-marku
p

Cheers

Norman


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Re: [Flightgear-devel] Golden Gate Bridge

2003-07-13 Thread Jim Wilson
Frederic Bouvier [EMAIL PROTECTED] said:

 A new bridge, the famoust, is in CVS :
 http://perso.wanadoo.fr/frbouvi/flightsim/fgfs-golden-gate-01.png
 

Wow!  What a nice view :-)  I've been having a ball flying circles around the
new construction the last couple weeks, checking it all out.  Great work!

Best,

Jim

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