[Flightgear-devel] Query about groundradar Instrument module
Hi, I am trying to familiarise myself with Flightgear's source code so that I may try and contribute. I am currently looking at the 'groundradar' instrument module and there is something within that is causing me some confusion. Essentially, there is a 'texture' declared as follows: static const char* default_texture_name = "Aircraft/Instruments/Textures/od_groundradar.rgb"; This is then used by the following method: void GroundRadar::createTexture(const char* texture_name) in the following way: FGTextureManager::addTexture(texture_name, getTexture()); Now all is good at this point until I go and look for this file, which i expected to find in data/Aircraft/Instruments/Textures/, however, this file does not appear there, nor does it appear anywhere else on my filesystem either. I thought, well maybe the code is not actually using this texture, since its a 'default_texture', however, when i change the name to point to something else which also does not exist, then, the once black background becomes white! So I am assuming that this file MUST be somewhere, but I have no idea where it is, can anyone assist me with this? Thanks Robbo -- All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity and more. Splunk takes this data and makes sense of it. Business sense. IT sense. Common sense. http://p.sf.net/sfu/splunk-d2dcopy1___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] Query about groundradar Instrument module
James, this sounds very interesting. I will check out the code this weekend if I get time and have a look through. I am pretty sure that this is the way I need to go to implement my instument! Alan, that instrument looks interesting. I may be able to use the technique for a 'layer' on my display. Is it essentially 'redrawing' parts of image texture tiles, calculated by position? I think my solution could use the tiled background with a dynamic layer on top. Robbo On Oct 1, 2011 9:40 AM, "James Turner" wrote: > > On 30 Sep 2011, at 19:52, Michael Robson wrote: > >> Essentially what I am looking to do is create some instruments of my own with some detailed generation of graphical entities that are being continually updated. I am therefore assuming that a 'dynamic texture' is the way to go with this. If there is another way, perhaps better, then I am open to suggestions! > > Correct, basically. > > Also note i just added a 'NavDisplay' instrument to Git, which is another kind of dynamic texture, along with ground-radar. It's new, untested code (that's part of my plan for this weekend), but is designed to show navigation type info (route, waypoints, traffic, airports, navaids) in a customisable way, and hence be used to simulate the navigation modes of various modern cockpits. > > Depending on what you want to do, you might be able to use the code as is, or certainly use it as an example (along with the other render-to-texture instruments) > > But, be aware I'm still shaking the bugs out - and then I need to write some docs :) > > James > > > -- > All of the data generated in your IT infrastructure is seriously valuable. > Why? It contains a definitive record of application performance, security > threats, fraudulent activity, and more. Splunk takes this data and makes > sense of it. IT sense. And common sense. > http://p.sf.net/sfu/splunk-d2dcopy2 > ___ > Flightgear-devel mailing list > Flightgear-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/flightgear-devel > -- All of the data generated in your IT infrastructure is seriously valuable. Why? It contains a definitive record of application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-d2dcopy2___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] Query about groundradar Instrument module
Ok so I think that I am making some progress here, but what I really need to do is 'register a listener', so that my code can be called for updating the dynamic texture. I have looked, but I am not too sure what to register my object as a listener with, can anyone point me in the right direction? I can see that in 'groundradar' there are two listeners registered, one with radar-range and one with airport, but what i really need is to have my code called continuously as part of the osg::frame! Any help would be appreciated, Robbo On 1 October 2011 18:23, Alan Teeder wrote: > > > *From:* Robbo > *Sent:* Saturday, October 01, 2011 10:57 AM > *To:* FlightGear developers > discussions > *Subject:* Re: [Flightgear-devel] Query about groundradar Instrument > module > > Alan, that instrument looks interesting. I may be able to use the technique > for a 'layer' on my display. Is it essentially 'redrawing' parts of image > texture tiles, calculated by position? > > > > > > Robbo > > The map uses the animation (usually used in Livery over MP) > to select which image tile to display, and the animation to > pan the image with lat-long. > > Alan > > > -- > All of the data generated in your IT infrastructure is seriously valuable. > Why? It contains a definitive record of application performance, security > threats, fraudulent activity, and more. Splunk takes this data and makes > sense of it. IT sense. And common sense. > http://p.sf.net/sfu/splunk-d2dcopy2 > ___ > Flightgear-devel mailing list > Flightgear-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/flightgear-devel > > -- All of the data generated in your IT infrastructure is seriously valuable. Why? It contains a definitive record of application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-d2dcopy2___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] Query about groundradar Instrument module
Actually, I think that the solution here would be to just use a standard OSG::NodeCallBack technique! please correct me if there is a better way of doing this within FGFS! Robbo On 1 October 2011 21:07, Robbo wrote: > Ok so I think that I am making some progress here, but what I really need > to do is 'register a listener', so that my code can be called for updating > the dynamic texture. > > I have looked, but I am not too sure what to register my object as a > listener with, can anyone point me in the right direction? > > I can see that in 'groundradar' there are two listeners registered, one > with radar-range and one with airport, but what i really need is to have my > code called continuously as part of the osg::frame! > > Any help would be appreciated, > > Robbo > > On 1 October 2011 18:23, Alan Teeder wrote: > >> >> >> *From:* Robbo >> *Sent:* Saturday, October 01, 2011 10:57 AM >> *To:* FlightGear developers >> discussions >> *Subject:* Re: [Flightgear-devel] Query about groundradar Instrument >> module >> >> Alan, that instrument looks interesting. I may be able to use the >> technique for a 'layer' on my display. Is it essentially 'redrawing' parts >> of image texture tiles, calculated by position? >> >> >> >> >> >> Robbo >> >> The map uses the animation (usually used in Livery over >> MP) to select which image tile to display, and the animation >> to pan the image with lat-long. >> >> Alan >> >> >> -- >> All of the data generated in your IT infrastructure is seriously valuable. >> Why? It contains a definitive record of application performance, security >> threats, fraudulent activity, and more. Splunk takes this data and makes >> sense of it. IT sense. And common sense. >> http://p.sf.net/sfu/splunk-d2dcopy2 >> ___ >> Flightgear-devel mailing list >> Flightgear-devel@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/flightgear-devel >> >> > -- All of the data generated in your IT infrastructure is seriously valuable. Why? It contains a definitive record of application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-d2dcopy2___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
[Flightgear-devel] Object scope help
Hi,
I am trying to develop a radar module which consists of two 'texture'
classes that are overlaid.
The classes are instantiated within instrument_manager:
} else if ( name == "taradar" ) {
set_subsystem( id, new TaRadar( node ), 1 );
} else if ( name == "taecho" ) {
set_subsystem( id, new TaEcho( node ), 1 );
and the objects perform as i would expect within flightgear.
next, I wish to call a method (TaRadar::getAngle) from within TaEcho, so to
do this, I assume that i do something like:
TaRadar* _taradar_node = (TaRadar*) globals->get_subsystem("
taradar");
cout << "angle: " << _taradar_node->getAngle << endl;
OR (neither work)
FGInstrumentMgr *imgr = (FGInstrumentMgr *)
globals->get_subsystem("instrumentation");
_taradar_node = (TaRadar *) imgr->get_subsystem("taradar");
cout << "angle: " << _taradar_node->getAngle << endl;
Now then, if TaRadar::getAngle() has the following fixed code:
return 10;
everything works ok, but if the method returns an object variable:
return _angle;
I get a segmentation fault. I assume this to be because the private
variable (_angle) has not been initialised, however, i even tried setting
the value to a fixed value within the constructor and it still does not
work.
constructor:
TaRadar::TaRadar(SGPropertyNode *node) {
cout << "TaRadar initialise" << endl;
_angle=5; //(declared in .hxx as float _angle;)
}
Does anybody know why this variable is appearing to be not initialised? am i
calling the wrong function to return a pointer to this object?
Thanks for any help
--
All the data continuously generated in your IT infrastructure contains a
definitive record of customers, application performance, security
threats, fraudulent activity and more. Splunk takes this data and makes
sense of it. Business sense. IT sense. Common sense.
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Re: [Flightgear-devel] Object scope help
Csaba,
Thanks, that makes complete sense, I did not spot that the id may be how it
is registered.
However, I have checked what value comes back from id and it is
'instrument-1-taradar', so i changed my call to:
globals->get_subsystem("instrument-1-taradar");
but this is still returning NULL!
i print out some useful info from my code:
log: set_subsystem: taecho: instrument-0-taecho
log: TaEcho constructor called
log: set_subsystem: taradar: instrument-1-taradar
log: TaRadar constructor called
log: TaRadar isnull = YES
Any other ideas why this is NULL?
Cheers
Robbo
2011/10/11 Csaba Halász
> On Tue, Oct 11, 2011 at 11:31 PM, Robbo wrote:
> >
> > The classes are instantiated within instrument_manager:
> >
> > } else if ( name == "taradar" ) {
> > set_subsystem( id, new TaRadar( node ), 1 );
>
> Notice that the subsystem will be registered using the "id" not the
> "name". So make sure you are using the correct value when retrieving
> it, below:
>
> > TaRadar* _taradar_node = (TaRadar*) globals->get_subsystem("taradar");
>
> --
> Csaba/Jester
>
>
> --
> All the data continuously generated in your IT infrastructure contains a
> definitive record of customers, application performance, security
> threats, fraudulent activity and more. Splunk takes this data and makes
> sense of it. Business sense. IT sense. Common sense.
> http://p.sf.net/sfu/splunk-d2d-oct
> ___
> Flightgear-devel mailing list
> Flightgear-devel@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/flightgear-devel
>
>
--
All the data continuously generated in your IT infrastructure contains a
definitive record of customers, application performance, security
threats, fraudulent activity and more. Splunk takes this data and makes
sense of it. Business sense. IT sense. Common sense.
http://p.sf.net/sfu/splunk-d2d-oct___
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