Bots' improvemed movement. about cod4x_server

[T-Maxxx]

I just added function for prediction player movement so bots looks a bit overpowered now ^^.
Youtube

[D4edalus]

sounds like a nice feature. i haven't yet experimented with bots in any way. but i always disliked that i need pezbots mod to test the simplest features. guess it would be nice to have the option to improve the AI :)
maybe somebody is motivated to develop an AI plugin in the future. 👍

[PureTryOut]

That is cool, it's stupid that bots couldn't do that in the first place. Could we see general bot AI improvement overall in Cod4X? It would be good to not need Pezbots anymore in the future for proper bots.

[T-Maxxx]

It is hard to write bots AI using gsc, even harder with C. And this movement under control of gsc scripts.

[T-Maxxx]

So? You want these features or not?

[D4edalus]

Sorry i was offline this week :)
So this would be functions that can be executed on a player via gsc to
perform all the possible movement styles? Leanleft/leanright, crouch, jump
whatever?

2016-07-11 5:56 GMT+02:00 Max [email protected]:

So? You want these features or not?

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[T-Maxxx]

Yes. You spawn bot as usual using command line or gsc scripts and then you use something like "self moveforward()" and bot begin move. Unfortunately, this commands will not work for players.

[PureTryOut]

Is this confirmed to be implemented in the future? Currently seems to be a bit dead as there is no confirmation yet

[T-Maxxx]

I don't know. Still waiting for confirmation...

[IceNinjaman]

How are you going to do that? Emitting usercmd packets into the SV_ClientThink() function every frame? That is what I'd prefer here so it looks like a real player moves them. I think Quake3 bots work over the same function.

[T-Maxxx]

Yes. SV_ClientThink() applies some logic to bots' usercmds before actual movement so this is best place.

[IceNinjaman]

Would be nice if you could do it then.

[IceNinjaman]

Okay I have commited the functions IW used to move bots. So you should have it easier now.

[T-Maxxx]

Just tested movement. Its ok.
From the other hand, function called each server frame(20 times per second) so its impossible to make smooth bot rotation. Smooth like its 250 FPS ofc.

[IceNinjaman]

Well that isn't correct. Clients see updates only every 50msec as well. When you have one update every serverframe it should look similar to other players moving on server. On clientside there happens interpolation between the current snapshot and the prior snapshot.

[T-Maxxx]

There is something weird with angles in usercmd. I can't identify its units. On screenshot you can see its value in integer and there should be rotation for 180 degrees from current origin but in fact there is <10 degrees actually in game.
The game shows extremely small numbers(XXe-41) when i'm grabbing vector from player usercmds. This is definetely not integers.

Hmm. Hexadecimal representation of its components always 2 bytes: so its values from 0(0deg) to 65535(360deg)?

[T-Maxxx]

Its direction is not constant and somehow related to spawn direction. (Sometimes 0 its west sometimes its not).

[IceNinjaman]

Well in the alpha xbox version of CoD4 its a 3 dimensional int vector.
I can examine the binary again and see if that offset in usercmd_t struct is making sense.

[IceNinjaman]

Well I am quite convinced that it is right as it is:
http://img.i-g.ninja/489ccdd8471eadb9d7732187112809c6

angles starting at offset 0x8

[T-Maxxx]

Yes, its 3 dimensional int vector but only LOWORDs are in use. I have found how to work with them. You were right - rotating smooth like I'm spectating after human.

[T-Maxxx]

Wasted 2 or 3 days because of wrong 65535-0 and 0-65535 ucmd angles transitions. But now it looks sexy.
Youtube

[IceNinjaman]

Nice you got that to work!

[PureTryOut]

That looks awesome! Soon we can have proper bot matches lol

[PureTryOut]

Except for the horrible desync you seem to be having, that is amazing! Maybe eventually a setting could be added for bot difficulty, ranging from very easy to hard like this. That would make proper bot matches possible.

Do you know what is up with that desync though?

[IceNinjaman]

Any idea why in killcam it looks like he is so much time off? Do you really use the current servertime and not something old when sending usercmds?

[T-Maxxx]

ucmd.serverTime zeroed at line 10, I'm not touching it. Scripts and killcam are from vanilla CoD.
Thats everything I'm doing for bots in this function for now. (And looks like thats all I need.)

[T-Maxxx]

ucmd.serverTime = Sys_Milliseconds(); didn't help.
Maybe this is because game still thinks its 1k ping for bot? (lag icon present) And all actions looks like 1 second faster than actual shots fired.

[IceNinjaman]

ucmd.serverTime = svs.time;

I am wondering how you can hit at all when you provide a so much wrong server time.

[T-Maxxx]

It hits perfect but impacts on demos and killcams.
Done. No desync anymore.
What is svs.time exactly? Time from map start? Or whole server?

[IceNinjaman]

Whole time server is running for in milliseconds. Most stuff uses it as base. It's resolution is only serverfps however. Time is constant during each frame where Sys_Milliseconds() isn't.

[IceNinjaman]

Does it still show the disconnected icon?

[T-Maxxx]

No.

[T-Maxxx]

So, don't you want to accept #45? It's ready and I want to focus on something more important.

[PureTryOut]

Do you have a video of the bots without desync btw? Or what commands would I need to run to get such a bot in a private game running your PR?

[T-Maxxx]

No, I haven't.
You can use my _globallogic.gsc with empty mod on mp_backlot.

[D4edalus]

that is very cool stuff! i have pulled it to a separate branch for now as it is a lot to look over.