[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 zakal...@mac.com 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 ajtee...@v-twin.org.uk wrote: *From:* Robbo robbo_b...@hotmail.com *Sent:* Saturday, October 01, 2011 10:57 AM *To:* FlightGear developers discussionsflightgear-devel@lists.sourceforge.net *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 property-base animation (usually used in Livery over MP) to select which image tile to display, and the textranslate 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
--
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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 csaba.hal...@gmail.com
On Tue, Oct 11, 2011 at 11:31 PM, Robbo robbo_b...@hotmail.com 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
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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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