[Flightgear-devel] model accumulation

[Melchior FRANZ <mfranz@ao...>]

Is everyone aware that we *never* free model branches? They are
only accumulated until fgfs is exited. If you teleport from KSFO
to LOWW/Europe, then you still have the KSFO terminal in memory.
Doesn't sound like a good idea to me. Currently we don't have
that many individual objects, but as people are contributing to
the fgdb, this may become a problem (textures!). And it certainly
will be a problem once I got Nasal support for scenery objects
into cvs.

m.

Re: [Flightgear-devel] Is there a property that gest the distance between an object and the point of view?

[Frederic Bouvier <fredfgfs01@fr...>]

Josh Babcock a =E9crit :
> Roberto Inzerillo wrote:
>  =20
>> I have a 3d object and I'd like to use a property out of the tree whic=
h
>> gets me the distance between the point of view and the object itself, =
in
>> order to apply an animation to that. Is there something like that
>> available?
>>
>>    =20
>
>
> No, but there is an animation called dist-scale that uses that distance
> to control the size of an object. So far I am unaware of any way to
> specify an object and expose that value for it. It would be handy to be
> able to get that info from a nasal call.
>  =20


Having such a property would mean that there would be a subtree for each
object in the scenery. Quite impractical, isn't it ?

The dist-scale animation compute a scale factor from the distance to the
viewer.
The flash animation compute a scale factor from the angle to the view
direction.

A question for Nasal expert : is nasal able to do vector and matrix
computation ? If yes, there is a 'SGCustomTransform' class in simgear.
For the moment, it requires a callback in C++ to compute the
transformation matrix. We can imagine this matrix could be computed in a
Nasal script inside the model's animation file.

-Fred

Re: [Flightgear-devel] Re: CVS: FlightGear/src/Sound voice.cxx,1.3,1.4

[Olaf Flebbe <oflebbe@go...>]

Hi,

Sorry about the late comment:

1) I do not understand lines like that

#ifdef HAVE_CONFIG_H
 #  include <config.h>
 #endif

in Simgear (math/sg_geometry.h) since the config file from Simgear is
simgear_config.h

2) The pthread-win32 library, needed for Windos do contain the same thre
lines of code.

#ifdef HAVE_CONFIG_H
#  include <config.h>
#endif

Its ugly to work around the different config files in 3rdparty libraries.

Olaf



2006/2/18, Melchior FRANZ <mfranz@...>:
>
> * Frederic Bouvier -- Saturday 18 February 2006 16:29:
> > Modified Files:
> >       voice.cxx
> > Log Message:
> > Not missing but at the wrong place
>
> Ah, OK. (Normally, one should keep #includes away from header
> files as much as possible, but as class definitions contain short
> code parts, this CONFIG_H is better put there. So I'd rather
> prefer to not have it in voice.cxx again, if it has no meaning
> anyway.)
>
>
> But frankly, I don't get this noise in all files:
>
>   #ifdef HAVE_CONFIG_H
>   #  include <config.h>
>   #endif
>
> Why the #ifdef? Is there a reasonable case where CONFIG_H is
> *not* available? Isn't it created by the build system? Doesn't
> its absence tell us that something went very wrong? So why do
> we even think about compiling files without it?
>
> And *iff* it can be missing in some relevant case. Why don't we
> have a much saner file fgfs.h that is to be included everywhere
> *instead*, which contains just:
>
>   /* fgfs.h */
>   #ifdef HAVE_CONFIG_H
>   #  include <config.h>
>   #endif
>
> m.
>
>
> -------------------------------------------------------
> This SF.net email is sponsored by: Splunk Inc. Do you grep through log
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>

Re: [Flightgear-devel] OpenGC Integration

[Arnt Karlsen <arnt@c2...>]

On Fri, 24 Feb 2006 11:48:18 -0800, John wrote in message 
<43FF6302.5050600@...>:

> Hi Jeff,
> 
> Yes, the OpenGC is just about comatose. And the interface between FG
> and OpenGC is not supported. There were some legal and liability
> issues related to use of the software by members of EAA and it was 
> pulled. 

..huh???  Is _not_ how I know EAAers, the EAA tradition is help out 
and share the fun like here in FG.  Url, pointers, I think this can be
fixed.

-- 
..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.

Re: [Flightgear-devel] Re: ATC voices (no AI at EGPD)

[Arnt Karlsen <arnt@c2...>]

On Fri, 24 Feb 2006 00:51:41 +0000, Willie wrote in message 
<200602240051.41222.willief@...>:

> On Thursday 23 February 2006 22:35, David Luff wrote:
> 
> >
> > I wonder if there's any scope for giving it phonetic help/hints for
> > stuff it doesn't pronounce well, such as "ATIS".  In fact, come to
> > think of it, I'm not sure I know how ATIS should be pronounced - I
> > always assumed it was "Ay-tis", but maybe "aah-tis" is correct?
> >
> > Cheers - Dave
> I pronounce it "Ay-tiss".  Somewhere Ive got a CAP (CAP56?) that gives
> the  non-std pronunciations for common aeronautical use in UK
> airspace. But we  certainly say "Ay-tiss" at Prestwick.  TBH we dont
> use the term that much ,  its usually just "information November" or
> whatever letter is current. Often  "information" is missed entirely as
> in  "Prestwick Tower, G-ATOM at Papa with  November, request taxi"  
> 
> If the ATIS changes  the Tower may  add " Information Mike is current"
>   ie 
> better re-tune and listen again cos November is history. But AFAIR
> they  rarely say "ATIS"

..I can see 3 settings needed here; --by-the-book, --sloppy-like-in-RL
and --multiplayer.  ;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.

Re: [Flightgear-devel] Is there a property that gest the distance between an object and the point of view?

[Robicd <robicd@gm...>]

>>I have a 3d object and I'd like to use a property out of the tree which
>>gets me the distance between the point of view and the object itself, in
>>order to apply an animation to that. Is there something like that
>>available?
> 
> No, but there is an animation called dist-scale that uses that distance
> to control the size of an object. So far I am unaware of any way to
> specify an object and expose that value for it. It would be handy to be
> able to get that info from a nasal call.
> 
> Josh

Thanks you for the hint.
It's not documented but used in a few models. I've seen examples making 
use of interpolation tables but maybe that's not mandatory.

Anyway I made use of those few lines and the result is not what I expected.
I have a few poly squares I want to scale, they're meant as emitting 
lights on a boat. Those polys are not placed at the center of the entire 
model, so scaling makes them move apart.

Melchior suggested me to move them to the center. Well I can't, they 
have to scale separately around different centerpoints.

I am not familiar with Blender (which I use for .ac exporting and some 
minor tasks) but I am familiar with other 3d modellers which let me set 
unique pivot points (for transformations) to every poly in the object. 
Is there's something with Blender too? Any suggestion?

    Roberto

[Flightgear-devel] Re: Flightgear-devel digest, Vol 1 #539 - 14 msgs

[Steve Knoblock <knoblock_private@ci...>]

>
>It's good you are doing this, and I also enjoyed seeing SVG displayed in=
 my

Thanks.

I hope it will encourage people who are good modelers but may be
confused by the various systems and terminology to contribute
aircraft. I hope it helps beginning modelers and dummies like me.


>browser in an HTML page. I'm working on something like that, but will =
not
>comment until later.
>
>I'd like to see the aircraft silhouettes more defined and recognizable =
as an
>aircraft type. It looked "wrong" to me initially, until I looked again.

I can understand that. Because they are semitransparent, they can
"flip" on you...which is why I added the tail section. This is the
best I can do in Inkscape for now. I do not have a graphics tablet, so
I can't draw the aircraft and used the stylized ones.

I tend to like a stylized form, but perhaps I can find a clip art
graphic or take a screen shot from FlightGear and work it in...not
sure how to add images within Inkscape yet.


>Also, you might say that there are two JSBSim coordinate systems - only =
one
>is really important for modelers. The JSBSim strucutral frame is the one
>aircraft modelers will be most interested in. That's the frame that all
>"located" objects in the JSBSim aircraft config file are placed relative=
 to.
>It is essentially the most often found "industry convention" coordinate
>frame. IT is also oriented the same as the FlightGear model frame.

Thanks, I appreciate your  info...this can be a very confusing
subject. Although I read the Yasim docs, I really did not get that the
coordinates were rotated 180 degrees until some strange results caused
me to bring it up in irc.

Steve

Re: [Flightgear-devel] Re: Any Billboard animation doc around?

[Josh Babcock <jbabcock@at...>]

Melchior FRANZ wrote:

> Yes. Put the object's center into the center of the object.
> And if you want to scale the object, you better do that at
> origin and then move it to its final place. Why don't you
> search a model that does what you need and look into the code?
> Regurgitating the common practice is a bit tedious. (Not that
> anyone forced me to answer. :-)  If you are using Blender,
> then you could also let this plugin help you (depending on
> your needs, of course):
> 


It is a little odd that the billboard animation does not take a <center>
element. I don't know of any other animation for which there is a point
that you cannot redefine.

Josh

Re: [Flightgear-devel] Is there a property that gest the distance between an object and the point of view?

[Josh Babcock <jbabcock@at...>]

Roberto Inzerillo wrote:
> I have a 3d object and I'd like to use a property out of the tree which
> gets me the distance between the point of view and the object itself, in
> order to apply an animation to that. Is there something like that
> available?
> 


No, but there is an animation called dist-scale that uses that distance
to control the size of an object. So far I am unaware of any way to
specify an object and expose that value for it. It would be handy to be
able to get that info from a nasal call.

Josh

Re: [Flightgear-devel] A-10 3D cockpit progress

[alexis bory <xiii@g2...>]

Lee Elliott a =E9crit :

> On Friday 24 February 2006 21:11, alexis bory wrote:


>> 10 more days and I will put a .tgz too :)


> How are those folk who like flying the A-10 getting on with the
> current version in cvs?

OK, Martin said quite the same thing :) I'm currently figuring out the
best way to prepare a separate folder like 'A-10-3Dcockpit' and tidy the
mess I made everywhere.

I'd like to upload some thing clean ( shall I upload to
ftp://ftp.ihg.uni-duisburg.de/FlightGear/incoming/ ? )

I'll do that ASAP, maybe sunday night or monday.


Alexis

[Flightgear-devel] Re: Any Billboard animation doc around?

[Melchior FRANZ <mfranz@ao...>]

* Robicd -- Saturday 25 February 2006 16:44:
> The emitting polygons seem to spin around the center of the entire 
> 3dmodel instead of staying in place (they have some offset from the 
> center of the model, they're placed in front of the boat).
> 
> Is there any way to let them stay where they are?

Yes. Put the object's center into the center of the object.
And if you want to scale the object, you better do that at
origin and then move it to its final place. Why don't you
search a model that does what you need and look into the code?
Regurgitating the common practice is a bit tedious. (Not that
anyone forced me to answer. :-)  If you are using Blender,
then you could also let this plugin help you (depending on
your needs, of course):

  http://members.aon.at/mfranz/flightgear/blender-textured-lights.html

It creates billboarding lights. (Needs a recent Blender.)
Or look at the file that it created and that is described in
the above tutorial:

  http://members.aon.at/mfranz/donauturm.tar.gz  [24 kB]



> Should I make them separate .ac files and load them in the .xml

No.

m.

[Flightgear-devel] Is there a property that gest the distance between an object and the point of view?

[Roberto Inzerillo <robicd@gm...>]

I have a 3d object and I'd like to use a property out of the tree which 
gets me the distance between the point of view and the object itself, in 
order to apply an animation to that. Is there something like that available?

   Roberto

Re: [Flightgear-devel] Re: Any Billboard animation doc around?

[Robicd <robicd@gm...>]

> You better look at Fred's beacon. The billboard animation is quite
> simple:
> 
>   <animation>
>       <type>billboard</type>
>       <object-name>...
>       <spherical>false</spherical>    ... defaults to true
>   </animation>
> 
> lights use sperical
> trees don't use it

I tried that by myself, I used the spherical option but I have some 
problem with the emitting polygon spinning around the boat though.
The emitting polygons seem to spin around the center of the entire 
3dmodel instead of staying in place (they have some offset from the 
center of the model, they're placed in front of the boat).

Is there any way to let them stay where they are? Should I make them 
separate .ac files and load them in the .xml with some kind of offset 
transformation? Is that the only way?

   Roberto

[Flightgear-devel] animation to improve light halos

[Josh Babcock <jbabcock@at...>]

Tiago Gusmao and I were talking on IRC about doing light halos and the
problem  of having them intersect with body parts and show up even when
the light is not in the line of sight. Look at the right landing light
(a flash animation) and the tail light (a billboard animation):
http://jrbabcock.home.comcast.net/flightgear/fgfs-screen-002.jpg
One looks wrong, and the other should not be there. Out idea is to add
another animation that works like this to solve these problems:

you give it:
a) some point to be the light source
b) the name of some object that you will be using as the halo

And it does this:
a) checks for line of sight to the point of origin and selects out the
object if there is none
b) causes the object to be rendered without z-buffer (an alternative
solution is to translate the object along the line of sight by some user
defined distance, and scale it so that it retains its angular size)

Wins:
You get a proper looking halo when you should, and not when you shouldn't

Losses:
Possibly slow to calculate LOS.

Unsolved problems:
- Transparent objects can't be considered when calculating line of site.
- What do halos really look like? Are they created in the lens of the
eye? If so rendering them without z-buffering will do the trick. If on
the other hand they are created by forward scattering as they pass
through the atmosphere, then nearby objects should obscure them, and
objects halfway between the light and the point of view should partially
obscure them. We will have to experiment to see what looks right.

A quick experiment here at my desk looking at a light across the street
shows that if I partially obscure the light with a card it obscures the
outer parts of the halo, but the inner bright portion of the halo
actually washes out a small bit of the edge of the card. Obscuring it
with a tree halfway to the light makes the inner washed out part larger,
but still obscures some of the outer halo, and trying to obscure the
light with an object near it leaves a completely circular halo and just
makes the light get dimmer and blink out as it is actually obscured. It
seems to be pretty tricky but there may be a good looking compromise.
Some optics research may be in order here.

So, what does everyone think? Good idea? Good approach? Suggestions and
graphics coders welcome.

Josh

Re: [Flightgear-devel] A-10 3D cockpit progress

[Lee Elliott <leee@sp...>]

On Friday 24 February 2006 21:11, alexis bory wrote:
> Hi,
>
> A-10 cockpit is on his way. I will put screenshots on my site
> from time to time.
>
>     http://croo.murgl.org/fgfs/A-10/index.html
>
> Images are hudge but not so heavy.
>
> 10 more days and I will put a .tgz too :)
>
>
> Next steps are:
>
> - HSI.
> - WP indicator in the AI.
> - altitude low warning light
> - nosewheel steering engaged light
> - canopy open light
> - fuel quantity indicator
> - find some more docs !!!
>
>
> Alexis
>
>
> I'will need months to cover all the panels :-D

Hi Alexis,

that's looking very nice.

How are those folk who like flying the A-10 getting on with the 
current version in cvs?

LeeE

[Flightgear-devel] Re: Any Billboard animation doc around?

[Melchior FRANZ <mfranz@ao...>]

* Roberto Inzerillo -- Saturday 25 February 2006 15:26:
> Is there any documentaion about the billboard animation to read?
> I'd like to understand how to use that animation in order to get some 
> boat/lighthouse lighting look nice.

You better look at Fred's beacon. The billboard animation is quite
simple:

  <animation>
      <type>billboard</type>
      <object-name>...
      <spherical>false</spherical>    ... defaults to true
  </animation>

lights use sperical
trees don't use it

m.

[Flightgear-devel] Any Billboard animation doc around?

[Roberto Inzerillo <robicd@gm...>]

Is there any documentaion about the billboard animation to read?
I'd like to understand how to use that animation in order to get some 
boat/lighthouse lighting look nice.

   Thanks,
     Roberto

[Flightgear-devel] Re: AI problems in CVS

[Melchior FRANZ <mfranz@ao...>]

* Melchior FRANZ -- Saturday 25 February 2006 11:59:
> I tracked this freeze down to this line in renderer.cxx:642:
> 
>         ssgCullAndDraw( globals->get_scenery()->get_vasi_lights_root() );
> 
> So it probably came with the point sprites [...]

No, wait. Or is it just that the scene graph gets obscenely big
due to some AI failure. I commented the line out and then it
froze somewhere else (another ssgCullAndDraw probably -- still
investigating).

m.

Re: [Flightgear-devel] AI problems in CVS

[James Turner <zakalawe@ma...>]

On 25 Feb 2006, at 07:46, Pigeon wrote:

>     Just thought someone might want to know about this, with current
> SG/FG cvs, if I have /sim/ai/enabled (i.e. --prop:/sim/ai/ 
> enabled=true),
> starting FG at KSFO (probably not KSFO specific) gives me this:
>
>     Attempting to schedule tiles for bogus lon and lat  = (-1000,0)
>     This is a FATAL error.  Exiting!

Just to weigh in, I was bringing up FG on my PowerBook yesterday and  
hit this - I thought it was my fault, but on the next run, it didn't  
happen. So it's definitely something transient / order-related.

James
--
The real enemy is the gramophone mind, whether or not one agrees with  
the record that is being played at the moment.

[Flightgear-devel] Re: AI problems in CVS

[Melchior FRANZ <mfranz@ao...>]

* Melchior FRANZ -- Saturday 25 February 2006 08:56:
> if I fly in the bay area with AI turned on, then
> fgfs starts to freeze in regular intervals after a few minutes
> (intervals ~8 seconds, freeze time increases from ~0.1 to ~0.5
> seconds over time).

I tracked this freeze down to this line in renderer.cxx:642:

        ssgCullAndDraw( globals->get_scenery()->get_vasi_lights_root() );

So it probably came with the point sprites that nVidia 8178/Linux
doesn't seem to be happy with. But the strange thing is that it only
occurs if I have AI models activated. What the heck do AI models have
to do with vasi/point sprites?! Some ugly OpenGL state changes that
interfere here?

m.

Re: [Flightgear-devel] AI problems in CVS

[Durk Talsma <d.talsma@xs...>]

On Saturday 25 February 2006 09:11, Durk Talsma wrote:
> On Saturday 25 February 2006 08:46, Pigeon wrote:
> >     Just thought someone might want to know about this, with current
> > SG/FG cvs, if I have /sim/ai/enabled (i.e. --prop:/sim/ai/enabled=true),
> > starting FG at KSFO (probably not KSFO specific) gives me this:
> >
> >     Attempting to schedule tiles for bogus lon and lat  = (-1000,0)
> >     This is a FATAL error.  Exiting!
> >
> >     (usually followed by some other problems including assert/abort/segv
> > or glibc double free error)
>
> Hi,
>
> This is a problem I've been investigating recently, and it looks like it is
> triggered when a non-existing AIModel is being loaded *before*
> tile-scheduling is completed. I don't know if/how/when this error occurs if
> you only run the AI system without the trafficmanager. I'm not (yet)
> familiar enough with the tile scheduling code to know what types of error
> may actually trigger this error message.
>

Just a quick followup: Both the aircraft_demo.xml, file and the TrafficManager 
data make use of the 737, which has just been upgraded in CVS.  This may 
cause problems, as the old 737 has been removed from CVS.

Cheers,
Durk

Re: [Flightgear-devel] AI problems in CVS

[Durk Talsma <d.talsma@xs...>]

On Saturday 25 February 2006 08:46, Pigeon wrote:
>     Just thought someone might want to know about this, with current
> SG/FG cvs, if I have /sim/ai/enabled (i.e. --prop:/sim/ai/enabled=true),
> starting FG at KSFO (probably not KSFO specific) gives me this:
>
>     Attempting to schedule tiles for bogus lon and lat  = (-1000,0)
>     This is a FATAL error.  Exiting!
>
>     (usually followed by some other problems including assert/abort/segv
> or glibc double free error)
>

Hi,

This is a problem I've been investigating recently, and it looks like it is 
triggered when a non-existing AIModel is being loaded *before* 
tile-scheduling is completed. I don't know if/how/when this error occurs if 
you only run the AI system without the trafficmanager. I'm not (yet) familiar 
enough with the tile scheduling code to know what types of error may actually 
trigger this error message.

In the mean time, you might want to check in your preferences.xml file, if the 
AI system has actually anything to do, and if all the required files are 
installed on your system. Below is my configuration:

  <traffic-manager>
     <enabled type="bool">true</enabled>
  </traffic-manager>

  <ai>
   <enabled type="bool">true</enabled>
   <!-- scenario>nimitz_demo</scenario -->
   <!-- <scenario>aircraft_demo</scenario> -->
  </ai>

As you see, I have the two scenarios commented out, and feed the AI system 
through the traffic manager instead. 

Cheers,
Durk

[Flightgear-devel] Re: AI problems in CVS

[Melchior FRANZ <mfranz@ao...>]

* Pigeon -- Saturday 25 February 2006 08:46:
> f I have /sim/ai/enabled (i.e. --prop:/sim/ai/enabled=true),
> starting FG at KSFO (probably not KSFO specific) gives me this:
> 
>     Attempting to schedule tiles for bogus lon and lat  = (-1000,0)
>     This is a FATAL error.  Exiting!

Works here, but if I fly in the bay area with AI turned on, then
fgfs starts to freeze in regular intervals after a few minutes
(intervals ~8 seconds, freeze time increases from ~0.1 to ~0.5
seconds over time). Needless to say that I don't turn AI on there.
I haven't seen those AI freezes elsewhere. Maybe it is the same
cause for your problem, and it only doesn't crash for me because
of different compiler/flags/options.

m.

[Flightgear-devel] AI problems in CVS

[Pigeon <pigeon@pi...>]

    Just thought someone might want to know about this, with current
SG/FG cvs, if I have /sim/ai/enabled (i.e. --prop:/sim/ai/enabled=true),
starting FG at KSFO (probably not KSFO specific) gives me this:

    Attempting to schedule tiles for bogus lon and lat  = (-1000,0)
    This is a FATAL error.  Exiting!     

    (usually followed by some other problems including assert/abort/segv
or glibc double free error)

    Starting it at another airport seems to be fine though.

    So far BACbKA (on IRC) and I both having this issue.


Pigeon.

FW: [Jsbsim-devel] RE: [Flightgear-devel] [BUG] JSBSim: crash on re-init

[Jon S. Berndt <jsb@ha...>]

[I sent this to the "wrong" list earlier today (the JSBSim-devel list).]

> Enjoy!

Enjoy!? I don't think so.

See below.

> #0  0x0812b332 in JSBSim::FGFDMExec::GetAtmosphere (this=0x0) at
> FGFDMExec.h:252
> #1  0x0813954e in JSBSim::FGInitialCondition::SetMachIC 
> (this=0xa4b0790,
> tt=0) at FGInitialCondition.cpp:186
> #2  0x08142f1c in SGRawValueMethods<JSBSim::FGInitialCondition,
> double>::setValue (this=0xa1b4b60, value=0) at props.hxx:406
> #3  0x084c8d4a in SGPropertyNode::set_double (this=0xa3ab4c8, 
> val=0) at
> props.cxx:445
> #4  0x084c3e64 in SGPropertyNode::setDoubleValue 
> (this=0xa3ab4c8, value=0) at props.cxx:1381
> #5  0x084bc469 in copyProperties (in=0xce303f8, out=0xa3ab4c8) at
> props_io.cxx:583
> #6  0x084bc6f4 in copyProperties (in=0xce301a0, out=0xadd89c0) at
> props_io.cxx:613
> #7  0x084bc6f4 in copyProperties (in=0xce27680, out=0xa445448) at
> props_io.cxx:613
> #8  0x084bc6f4 in copyProperties (in=0xce27620, out=0xa4583d8) at
> props_io.cxx:613
> #9  0x084bc6f4 in copyProperties (in=0xcce0f00, out=0x8987608) at
> props_io.cxx:613
> #10 0x080537d4 in FGGlobals::restoreInitialState (this=0x8987480) at
> globals.cxx:235
> #11 0x082b68a2 in reInit (cb=0x0) at gui_local.cxx:71
> 
> m.   :-)

OK, in debugging this, please set the simgear logging environment
variable so that the JSBSim console messages are output as the aircraft
configuration is read in. Then, post the JSBSim specific console
messages here. That will help. Which aircraft is being laoded? What are
the initial conditions, etc.?

Jon