FSXA SPEED_REQUESTED flag not respected

[ollyau]

I'm using SimConnect_AICreateSimulatedObject to create an AI boat, then using SimConnect_SetDataOnSimObject to send the boat a SIMCONNECT_DATA_WAYPOINT structure. I set the SPEED_REQUESTED flag on each waypoint, but the AI system doesn't seem to respect the flag. When requesting 30 knots, the speed tends to oscillate ±3 knots (usually on the minus side). I've tried requesting 10 knots, and the speed tended to oscillate ±2 knots.

Any ideas why this is happening? Mission AI seems capable of maintaining the requested speed without minor oscillations, so I don't see any reason why I can't do the same via SimConnect.

If it makes a difference, I'm using the SDK's SimConnect library (not Tim/Beatle's Beta 3).

Here's the code I use to send waypoints (based on the SDK Managed AI Waypoints sample):

        private void sendWaypoints()
        {
            if (CarrierID != 0)
            {
                SIMCONNECT_DATA_WAYPOINT[] ft = new SIMCONNECT_DATA_WAYPOINT[listView1.Items.Count];

                simconnect.AddToDataDefinition(DEFINITIONS.CarrierWaypoints, "AI WAYPOINT LIST", "number", SIMCONNECT_DATATYPE.WAYPOINT, 0.0f, SimConnect.SIMCONNECT_UNUSED);

                for (int i = 0; i < listView1.Items.Count; i++)
                {
                    ft[i].Flags = (uint)SIMCONNECT_WAYPOINT_FLAGS.SPEED_REQUESTED;
                    ft[i].Altitude = -1.0;
                    ft[i].Latitude = Double.Parse(listView1.Items[i].SubItems[1].Text);
                    ft[i].Longitude = Double.Parse(listView1.Items[i].SubItems[2].Text);
                    ft[i].ktsSpeed = Double.Parse(listView1.Items[i].SubItems[3].Text);
                }

                // Create a polymorphic array

                Object[] objv2 = new Object[ft.Length];
                ft.CopyTo(objv2, 0);

                // Send the waypoints to the carrier
                simconnect.SetDataOnSimObject(DEFINITIONS.CarrierWaypoints, CarrierID, 0, objv2);

                displayText("Waypoint list sent...");
                setButtons(false, false, false, true, true);
            }
            else
                displayText("Carrier ID not set!");
        }

Edit: Was doing some further testing and it seems like the carrier is yielding to the user. Could this be causing the deceleration? Either way, is there a way to disable this for SimConnect based AI?

 

[ollyau]

I hate to be that person (who bumps threads), but I'm a bit impatient and looking for an answer.

I did a test and wrote a secondary program using Beatle's SimConnect library, in which I get the same issue. Carrier yields to user and won't maintain speed. Is there some trick or something obvious I'm missing? I set the SPEED_REQUESTED flag to no avail.

Thanks,
Orion

 

[ollyau]

Anybody have any ideas? Either on yield to user or SPEED_REQUESTED, preferably both.