Thanks Martin,
My set up is one FG machine with 3 slave FG machines, they are the 3
window views. But I am also using the sound harware in them. The main aim is
to get the Ai aircraft and the selected cloud layers the same in all
windows.
( i have succeded with multiplayer just by forwardng on the recieved data
steam to the slaves.)
Sticking with FG convension as I see it in FG code I have cloned the native
net controls format, just different porperties. This io stream also passes
the cloud layer data, 3d clouds enabled and other items so they are all the
same in the slave window views.
I have added a couple of poperties to the original AI Aircraft tree, eg the
model path string, A/c tail number, callsign and livery. This is just to
make them easy to pick up with the io routine and also debuging.
I have stored the recieved copy of the Ai aircraft properties in a new
branch of the AI tree with the io protocol 10 times a second. this is at
/ai[0]/models[0]/slave/aircraft[i].
Hopefully having said that, you can imagine this code tacked into the bottom
of the net io protocols, called every time a new update of the properties is
recieved, There is no sorting in it as yet, its only a run once thing for
now it is purely to get to the stage of adding one aircraft to the ai sub
system from the recieved data in the slave . After that its working I should
be able to deal with adding update and delete.
The mechanisms to attach and update the remote date are all in FG, It just i
only do C in single chips and am in over way my head with the c++ .
What I am trying to do below is create a model object, load it with the data
and attach it to the Ai system the same way traffic manager and multiplayer
do without changing any of the existing FG code. Once its attached I will
keep it updated from the recieved data. (infact what I have found just
droping the postion info the the tree works if I let the traffic manager
system generate the models).
Below works fine to the printf("found mp.. Thus i know i have the path
string though ok from the master. The problem starts when I try to load the
new aircraft object with the model path string, either the compiler
complains (my errors) or it has a seg fault after running.
Note the areas with the // commented out code my attempts to load those
items
If I leave the new object un modified (as is now in the code below) and
attach it with the aiMgr->attach(aircraft1); line, it still brings about
a seg fault. I suspect this could be because it is in fact empty. My many
attempts give errors that seem to indicate I have created the new object
with FGAIAircraft* aircraft1 = new FGAIAircraft; correctly.
// begin work area to attach an aircraft to the ai system
// earlier we ensured Shut down of the "Traffic Manager enabled" prop as we
are recieving our traffic
// : info includes at the start
// #include <AIModel/AIBase.hxx>
// #include <AIModel/AIAircraft.hxx>
// #include <AIModel/AIManager.hxx>
// temporary flow control just for testing in a run once only non indexed
scenario , this node will not exist , after exit it will
if( ! fgHasNode("/ai[0]/models[0]/aircraft[0]/atttached")){
printf("have start \n");
// point node to the branch where the remote system AI plane data has been
placced to
node = fgGetNode("/ai[0]/models[0]/slave/aircraft[0]", false);
SGPath mp(globals->get_fg_root());
SGPath mp_ai = mp;
temp = node->getStringValue("path"); // returns the model path
recieved from the master machine
"Aircraft/777/777-SingaporeAirlines.xml"
mp.append(temp);
mp_ai.append("AI");
mp_ai.append(temp);
if (mp.exists() || mp_ai.exists()) {
printf("found mp, means the model path from the master was found on this
machine \n");
}
FGAIAircraft* aircraft1 = new FGAIAircraft; // create a new
aircraft entitie to dadd to the AI system
// Load the variables to the to the new AI aircraft. the model path, its
registration number, livery and callsign
// aircraft1->setPath(node->getStringValue("path"));
// temp = node->getStringValue("path");
//aircraft->setPath("Aircraft/777/777-SingaporeAirlines.xml");
// aircraft1->setPath(temp.c_str());
// temp = node->getStringValue("registration");
// aircraft->setRegistration(registration.c_str());
temp = node->getStringValue("callsign");
// aircraft->setCallSign(temp);
// temp = node->getStringValue("livery");
// aircraft->setLivery(lvry.c_str());
printf(" aircraft loaded with strings from property tree \n");
FGAIManager *aiMgr = (FGAIManager*)globals->get_subsystem("ai_model");
if (aiMgr) {
aiMgr->attach(aircraft1);
printf("have aiMgr\n");
// i = aircraft1->getID(); // if aircraft is attached we store this
number
node = fgGetNode("/ai[0]/models[0]", false );
node->setBoolValue("aircraft[0]/localID",i,true); // used later with the
a/c registration number to keep models in sync with master
// temporty flow control airaft attaced to tree, create this node to we dont
run again
node->setBoolValue("aircraft[0]/atttached",true);
printf(" ID %i \n");
} // end of if aimgr
} // end of if have node
// end of work area
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