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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