[L4D2] HUD Display Manager (April 9th, 2024)

gabuch2 · **Author**

HUD Display Manager
Left 4 Dead 2 has a hard limit of how many players can display in the HUD at the same time, the real hard limit is 4 (Not counting you) but this is rather buggy. It will always show the first actors of the campaign.

This plugin manipulates the data sent to the clients, displaying its nearest 3 teammates instead. You can see it in action in this video.

ConVars

sm_l4d2_hud_display_enabled
- Enables the plugin.
  - Default: 1
sm_l4d2_hud_display_query_time
- Determines the time between position checks. Less is smoother, but may lead to increased overhead. 3.0 is my personal recommended value but you can adjust it as needed.
  - Default: 3

Changelog

1.0.1
- Better checks to avoid possible errors when unhooking players and map ending
- Included an alternative compile option to give support to SendProxy includes with an optional per_player parameter
1.0.0
- Initial Release

Dependencies

SendProxy Manager with per_player support.
- This plugin was mostly made and tested extensively with TheByKotik's version in mind. Other versions may theoretically work but intended behavior is not guaranteed!
- I provide Binaries for Left 4 Dead 2 Linux here.

Supported Games

Left 4 Dead 2

Theoretically can work on Left 4 Dead 1 but it is untested.

Download and Source Code:

Download from AlliedModders:

You need to download the .sp file and compile the plugin yourself as the AlliedModders' forum compiler lacks the necessary includes to provide you with a working binary.

liquidplasma · 04-09-2024 , 17:48 Re: [L4D2] HUD Display Manager (April 7th, 2024)

After a bit of testing I've noticed my own HP bar disappears and there's like the other 4 survivors instead.

Rarely I get Invalid timer handle error in logs

Spoiler

There was one instance where I got Invalid Edict Index

Spoiler

I'm on windows too if that could be the cause of these errors

gabuch2 · 04-09-2024 , 20:25 Re: [L4D2] HUD Display Manager (April 7th, 2024)

Quote:

Originally Posted by liquidplasma

After a bit of testing I've noticed my own HP bar disappears and there's like the other 4 survivors instead.

Rarely I get Invalid timer handle error in logs

Spoiler

There was one instance where I got Invalid Edict Index

Spoiler

I'm on windows too if that could be the cause of these errors

The behavior you're describing is strange, and I think I know the issue. This plugin requires a version of SendProxy version with per_player support (I forgot to state it in the post). Like I said in the OP, I can provide Linux binaries but for Windows there might be a problem since I don't use that platform. SendProxy versions with optional per_player parameter (arthurisdead's) may not be compatible without making a small change, if you're sure you're using one of those make sure to update the plugin and recompile with the PER_PLAYER_OPTIONAL flag set to true.

1.0.1

Better checks to avoid possible errors when unhooking players and map ending
Included an alternative compile option to give support to SendProxy includes with an optional per_player parameter

R4to0.exe · *Last edited by R4to0.exe; 04-09-2024 at 21:20.*

Quote:

Originally Posted by gabuch2

Like I said in the OP, I can provide Linux binaries but for Windows there might be a problem since I don't use that platform.

Hello. I am the one who offered compiled Windows binaries for @liquidplasma. They were compiled straight from your repository fork, worked without any extra changes. I did also created signatures for Windows and provided to him.

I've compiled with the following commands:

Code:

python ../configure.py --sm-path="../../../sourcemod" --enable-optimize --sdks="l4d2" --mms-path="../../../mmsource" --symbol-files
ambuild

You can probably add these to Github CI to automatically build Windows binaries. I know you can't test on Windows but I think the community can take care of that right?

Here's the signatures in case you want to update in your repo, these worked pretty well for @liquidplasma. I used Ghidra with makesig.py script:

Code:

    "left4dead2"
    {
        "Signatures"
        {
            /**
             * Signature for CGameClient::ShouldSendMessages
             * 
             * How to find:
             * - search for "%s overflowed reliable buffer\n"
             * - there will be two matches, it's usually the first one
             * - find a reference to the function at the top
             * - pick the only "CALL FUN_XXXX" that is in the list
             * 
             */
            "CGameClient::ShouldSendMessages"
            {
                "library"    "engine"
                "windows"    "\x55\x8B\xEC\x51\x56\x8B\xF1\x80\xBE\x2A\x2A\x2A\x2A\x00\x74\x2A\x83\x3D\x2A\x2A\x2A\x2A\x00"
            }

            /**
             * Signature for CGameServer::SendClientMessages
             * 
             * How to find:
             *  - search for "SendClientMessages"
             *  - there's 2 matches, it's usually the first one
             *  - to make sure you're in the right method there will be a string called "sv_main.cpp" above "(%s)%s","Networking","SendClientMessages"
             * 
             */
            
            "CGameServer::SendClientMessages"
            {
                "library"    "engine"
                "windows"    "\x55\x8B\xEC\x81\xEC\xB4\x00\x00\x00\xA1\x2A\x2A\x2A\x2A\x53"
            }
            
            /**
             * Signature for SV_ComputeClientPacks
             * 
             * How to find:
             *  - Simply search for "SV_ComputeClientPack", or "sv_packedentities.cpp"
             * 
             */
            "SV_ComputeClientPacks"
            {
                "library"    "engine"
                "windows"    "\x55\x8B\xEC\x83\xEC\x44\xA1\x2A\x2A\x2A\x2A\x53"
            }
        }
    }

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