[C++/SHV] How can I get vehicle states data periodically?

[Narx]

void ScriptMain()
{
	while (true)
	{
		// Get Timestamp
		QueryPerformanceCounter(&EndingTime);
		ElapsedMicroseconds.QuadPart = EndingTime.QuadPart - StartingTime.QuadPart;
		ts = ElapsedMicroseconds.QuadPart / 10000.0;

		// Get Vehicle States in every 10ms
		if (ts >= 10.0) {
			GetVehicleStates();
			QueryPerformanceCounter(&StartingTime);
		}
		WAIT(0)
	}
}

This is a pseudocode of my script.

 

I want to get vehicle states in every 10ms (or ~ 100ms).

But WAIT(0) function spends at least 7ms or more.

So the sampling time becomes fluctuative.

 

GTAMods Wiki says, "Without a wait, the game locks itself into processing the script and cannot process the rest of the game." (0001 - GTAMods Wiki)

Is it inevitable to spend the computational time for WAIT() and can't get data from GTA V frequency-accurately in millisec scale?

 

This graph shows the fluctuation of sampling time. (ts=100ms)

 

Edited August 31 by Narx

[ikt]

The physics engine seems to also operate at the same rate as the framerate - so every "tick" (WAIT(0)) is also aligned with a frame.

 

You could fetch information every frame and add a timestamp, or choose a sampling rate where the framerate fluctuations are not significant (10 Hz or something).

 

Or if you fetch data directly from the vehicle object in memory, in a not-ScriptHookV-thread, you aren't limited to framerate with sampling time. But be aware the data still only updates at the framerate rate.