SIMCONNECT_DATA_REQUEST_FLAG_CHANGED does not fire, (sometimes after a while).

[Sims]

I first get the list of the AI aircrafts.

SimConnect_RequestDataOnSimObjectType(
..., REQUEST_1, DEFINITION_1, 
200000, 
SIMCONNECT_SIMOBJECT_TYPE_AIRCRAFT
);

Then in the call back function I add all the object IDs

...
case SIMCONNECT_RECV_ID_SIMOBJECT_DATA_BYTYPE:
{
  SIMCONNECT_RECV_SIMOBJECT_DATA_BYTYPE *pObjData = (SIMCONNECT_RECV_SIMOBJECT_DATA_BYTYPE*)pData;
  switch(pObjData->dwRequestID)
  {
    case REQUEST_1
    SimConnect_RequestDataOnSimObject
    ( 
    ..., REQUEST_2, DEFINITION_1, 
    ObjectId,
    SIMCONNECT_PERIOD_SECOND,
    SIMCONNECT_DATA_REQUEST_FLAG_CHANGED
    );

And my RECV ID section...

case SIMCONNECT_RECV_ID_SIMOBJECT_DATA:
{
  SIMCONNECT_RECV_SIMOBJECT_DATA *pObjData = (SIMCONNECT_RECV_SIMOBJECT_DATA*)pData;
  switch(pObjData->dwRequestID)
  {
    case REQUEST_2
    ...

I get no exceptions, and sometimes I get some data, most of the time I get no data.

As a test I am using the AI traffic object sample.
I can see the truck going up and down the runway, but I never get a notification when it happens.

What could be the problems.

Sims

 

[Sims]

Actually I am been silly, (not reading the doc again ).

I am trying to add requests.
I thought you could have more than one object ID per request.
obviously that's not possible.

hr = SimConnect_RequestDataOnSimObject(hSimConnect, REQUEST_1, DEFINITION_1, dwID1, SIMCONNECT_PERIOD_SECOND,  SIMCONNECT_DATA_REQUEST_FLAG_CHANGED); 

hr = SimConnect_RequestDataOnSimObject(hSimConnect, REQUEST_1, DEFINITION_1, dwID2, SIMCONNECT_PERIOD_SECOND,  SIMCONNECT_DATA_REQUEST_FLAG_CHANGED);

But that begs the question, if I want to follow AI objects to I need to make a request for each one of them?

In itself it is not a problem, there are ways.
How can I make a request for more than one item at a time?

Sims

 

[Pete Dowson]

But that begs the question, if I want to follow AI objects to I need to make a request for each one of them?

Yes, of course. I make the same request for each AI aircraft I am notified of. Your code has to keep the ID and details tabulated, of course.

How can I make a request for more than one item at a time?

Each time you add an item by the AddToDataDefinition call, you are building up what will be sent to you by the one RequestData call (sorry for not using full API names. It gets a bit tiresome -- you know the ones).

If you don't use tagged data you get the same structure back -- your AddToDataDef calls would be exactly in the order of items in your structure. If you asking for a lot of stuff which may not change often, that is very wasteful, however. For instance, asking for the aircraft title and registration and destination, and so on, as well as its position, will mean that all of that is sent every time its position changes.

So, you should either use tagged data (each item is preceded by its tag number so you can process the data item by item), or you should split the frequently changed ones into different data definitions, and hence separate Request calls, from the seldom changed ones.

Regards

Pete

 

[beatle]

AddToDataDef is for individual fields, he's asking about getting the same data back for different AI Objects, and for that you do have to use a unique request ID for each request you send.

The way I handle this is to create an entry in my request enum def like this:

REQUEST_AI_DATA = 0x10000000,

and then use (REQUEST_AI_DATA + dwObjID) as the unique request ID.

 

[Pete Dowson]

AddToDataDef is for individual fields, he's asking about getting the same data back for different AI Objects, and for that you do have to use a unique request ID for each request you send.

Yes, of course. When I answered "I make the same request for each AI aircraft ..." I din't mean to imply that the request ID was the same. Sorry if I was misleading.

The way I handle this is to create an entry in my request enum def like this:
REQUEST_AI_DATA = 0x10000000,
and then use (REQUEST_AI_DATA + dwObjID) as the unique request ID.

Yes, I do a similar thing.

Most of my answer was to his second question, about more than one item at a time.

Best Regards

Pete

 

[Sims]

Yes, of course. When I answered "I make the same request for each AI aircraft ..." I din't mean to imply that the request ID was the same. Sorry if I was misleading.



Yes, I do a similar thing.

Most of my answer was to his second question, about more than one item at a time.

Best Regards

Pete

Thanks all or the replies.
Sorry if my questions where a bit misleading

Regards,

sims.

 

[beatle]

Most of my answer was to his second question, about more than one item at a time.

I took his more than one item at a time to mean more than one SimObject or ObjID at a time instead of more than one SimVar at a time.

 

[Pete Dowson]

I took his more than one item at a time to mean more than one SimObject or ObjID at a time instead of more than one SimVar at a time.

Ah ... maybe.

Pete

 

[Sims]

I took his more than one item at a time to mean more than one SimObject or ObjID at a time instead of more than one SimVar at a time.

That is indeed what I was trying to say. One objectID at a time.
In any case, all the replies were very useful.

Thanks

Sims