Thorsten,
Thanks for your prompt reply.
I get that the pointer is NULL, but I do not understand why!
I believe that I have called the correct method to return a pointer to the
object. And since I know that the object has been instantiated (since i get a
cout message to tell me and also i can see the object doing what its supposed
to be doing on screen).
Do you have any idea why this object may be null? have i correctly registered
the instrument? does the instrument not persist until program completion? How
do I correctly obtain a pointer to this object if this is not the correct way?
Thanks
Robbo
> Date: Tue, 11 Oct 2011 23:42:42 +0200
> From: bre...@gmail.com
> To: flightgear-devel@lists.sourceforge.net
> Subject: Re: [Flightgear-devel] Object scope help
>
> On 11.10.2011 23:31, Robbo wrote:
> > TaRadar* _taradar_node = (TaRadar*) globals->get_subsystem("
> > taradar");
> >
> > 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.
>
> That means "_taradar_node" is NULL. Calling _taradar_node->getAngle() is
> illegal if _taradar_node=0. However, if the method you're calling
> doesn't access the object itself, but just returns a constant ("return
> 10"), then nothing happens (lucky!). Add a check "if (_taradar_node!=0)
> ..." and see why the pointer is NULL.
>
> cheers,
> Thorsten
>
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threats, fraudulent activity and more. Splunk takes this data and makes
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