Increasing friction with ZScript

[EmperorGrieferus]

Hi, I want to try myself in ZScript, and the first thing I want to do is simply translate this little ACS script.

Code: Select all

Script "Slip reduction" ENTER
 {
  while (1)
   {
	 SetActorProperty(0, APROP_Friction, 0.94);
	 if (GetPlayerInput(-1, INPUT_FORWARDMOVE)  ||  GetPlayerInput(-1, INPUT_SIDEMOVE))
     {
	   SetActorProperty(0, APROP_Friction, 1.0);
	  }
	 Delay(1);
   }
 }

It simply makes movement less slippery. Now, I know about NashMove mod, but I do believe there's more elegant way to do this.

[Jarewill]

There are two ways to do this.
First is to override Tick in your player class, this will make it only your-mod-specific:

Code: Select all

	Override void Tick(){
		Super.Tick();
		friction=0.94;
		If(player.cmd.forwardmove || player.cmd.sidemove){
			friction=1;
		}
	}

The other is to create a new item and do the same with in the item's DoEffect override:

Code: Select all

Class FrictionItem : Inventory{
	Override void DoEffect(){
		Super.DoEffect();
		//This time we will use the owner pointer.
		If(!owner || !owner.player){Destroy();}
		owner.friction=0.94;
		If(owner.player.cmd.forwardmove || owner.player.cmd.sidemove){
			owner.friction=1;
		}
	}
}

Now to automatically give this item to the player, you will want to use an event handler, like so:

Code: Select all

Class FrictionHandler : EventHandler{
	Override void PlayerEntered(PlayerEvent e){
		let playe = players[e.PlayerNumber].mo;
		If(!playe.FindInventory("FrictionItem")){playe.GiveInventory("FrictionItem",1);}
	}
}

Make sure to also include the event handler in MAPINFO:

Code: Select all

GameInfo{
	AddEventHandlers = "FrictionHandler"
}

[EmperorGrieferus]

Thank you very much! I'm gonna test it!
I considered translating the ACS script to ZScript because of camera jerking concerns.
You see, when I shortly used earlier version of Nash's Q-Tilt, which was written in ACS, I'd always get camera jerking the second I'd start circlestrafing (I know it's because ACS is tickrate-dependant, but anyway).
And from Tilt++ promotional, the whole thing looks really smooth, so I decided, why not move it to ZScript, even though I'm pretty conservative, thus I think that majority of mods can be made with only Decorate and ACS.

Tl;dr, I know.

[EmperorGrieferus]

So, about the first one.
Should it contain something else? Because when I tried to launch it, it failed because it couldn't find class.
The second one also failed, because it couldn't recognize the "owner.player.cmd.forwardmove/sidemove" part.

[Jarewill]

Oh right, you need to specify a ZScript version in the first line of the file, for example: version "4.0"

And regarding the first one, it needs to be within your player class, like:

Code: Select all

Class MyPlayer : DoomPlayer{
	//The code goes here
}

[EmperorGrieferus]

Oh right, you need to specify a ZScript version in the first line of the file, for example: version "4.0"

And regarding the first one, it needs to be within your player class, like:

Code: Select all

Class MyPlayer : DoomPlayer{
	//The code goes here
}

That's the problem: I specified the version.
Maybe, it's because the version I use doesn't support this exact command. However, I can't find anything like this in wiki.

[EmperorGrieferus]

So, after digging through Player_t, I've finally found the necessary natives. However, I don't really know what's the difference between Move1 and Move2.

UPD: Even these doesn't work. Maybe, I should try "GetPlayerInput", though I doubt.

[EmperorGrieferus]

I decided to perform an experiment, and...
Let's just say that my hopes are ruined. GZDoom, Eternity and even Unity Port show a hardly noticeable stuttering when you turn and strafe at the same time, Crispy Doom smoothes it which looks even weirder, and only DSDA-Doom showed no sign of it (Perhaps, this is because of interpolation algorithm used by first four ports).
I request to close this topic and I apologize for any inconvenience. Jarewill, big Russian spasibo for tutorial. I'll consult with you in DMs.

[merlin86]

For the stuttering problem I've noticed the following things:
- prefer GSync if your gpu and monitor supports that
- always choose performance mode for your GPU / CPU
- Lock, if it's possible from the program, the fps in multiple of 35 fps and stay under the refresh rate of your monitor ( for example my monitor is 144 Hz so usually for me are 140 fps )
- Prefer the dxgi swap chain from your driver settings if your gpu supports that
- prefer vulkan instead of openGL if possible
- update the gpu drivers and install all the updates for your OS

I've followed those suggestions and I have a smooth experience in nugget doom and latest gzdoom.

[EmperorGrieferus]

1) I will see if my GTX 1050 Ti has this
2) Yessir!
3) I've chosen 70 fps, since this was the framerate Doom was intended to play in
4) I couldn't find it in NVIDIA Control Panel. Details required!
5) Not possible. Besides, AFAIK implementation of Vulkan on NVIDIA devices is rather buggy
6) I'm on it, OS is updated

[merlin86]

4) The one highlighted: https://i.imgur.com/o8A5roZ.png , if not present, it means your drivers are old or GTX series does not support the DXGI swapchain (maybe only on Windows 11 / 10 ? )
5) Yeah, I know that with my RTX 4070, April drivers had a lot of problems, December drivers look better for Vulkan

[EmperorGrieferus]

As it turns out, my display doesn't support DP, which, idealistically, should support G-Sync.
If you need, my display is Philips PHL273V7QDS.