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heliopsUK avatar image
heliopsUK asked heliopsUK answered

RequestDataOnSimObject returns exception

Hi,

I'm trying to read the ObjectID following the creation of an object using AICreateSimulatedObject. This is an extract from the SimConnect Debug Log.

> 1458.77925 [342, 6]AICreateSimulatedObject:szContainerTitle="Ambulance03", InitPos=1119350480, RequestID=5
< 1458.78427 [342] AssignedObjectID: RequestID=5  ObjectID=438
> 1458.78480 [342, 7]RequestDataOnSimObjectType:RequestID=5, DefineID=1, dwRadiusMeters=100000, type=5
< 1458.78553 [342] >>>>>  EXCEPTION=3, SendID=7, Index=2  <<<<<

I should add that the object is created without any problem, it just keeps wandering off on it's own little journey down the hill! Basically, I'm trying to read the ObjectID to then send some waypoints.

I'm using the Python SimConnect library coupled with the Python MobiFlight WASM Module.

Any help greatly appreciated!

simconnecthelp
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2 Answers

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BenBaron85 avatar image
BenBaron85 answered BenBaron85 edited

Hi,

I think you actually got the use-case of RequestDataOnSimObjectType() wrong.

What you'd normally do in your case is listening to SIMCONNECT_RECV_ID_ASSIGNED_OBJECT_ID in your SimConnect dispatch procedure after the SimConnect_AICreateSimulatedObject() call. Once that comes in, you cast the SIMCONNECT_RECV* into SIMCONNECT_RECV_ASSIGNED_OBJECT_ID*.

From that you can finally match your RequestId and get an ObjectId that you can then use in later calls...like to send a list of waypoints.

Greets, Ben

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heliopsUK avatar image
heliopsUK answered

Hi Ben,

That's brilliant thanks! Completely misread that bit of the SDK docs! For those of you using Python SimConnect here is what I've done in a very hacky kinda way:

1. Add a new elif clause to the my_dispatch_proc function in SimConnect.py

elif dwID == SIMCONNECT_RECV_ID.SIMCONNECT_RECV_ID_ASSIGNED_OBJECT_ID:
            pObjData = cast(
                pData, POINTER(SIMCONNECT_RECV_ASSIGNED_OBJECT_ID)
            ).contents
            objectId = pObjData.dwObjectID
            os.environ["OBJECT_ID"] = str(objectId)

2. Create a Sim Object using AICreateSimulatedObject:

def createSimulatedObject(self, name, lat, lon, rqst, hdg=0, gnd=1, alt=0, pitch=0, bank=0, speed=0):
        simInitPos = SIMCONNECT_DATA_INITPOSITION()
        simInitPos.Altitude = alt
        simInitPos.Latitude = lat
        simInitPos.Longitude = lon
        simInitPos.Pitch = pitch
        simInitPos.Bank = bank
        simInitPos.Heading = hdg
        simInitPos.OnGround = gnd
        simInitPos.Airspeed = speed
        self.dll.AICreateSimulatedObject(
            self.hSimConnect,
            name.encode(),
            simInitPos,
            rqst.value
        )

3. Sleep for 1 second and then print the os.environ["OBJECT_ID"]

Definitely isn't the prettiest code but works for what I need!

Chris

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