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L4D2-Community-Update

Help us shape the potential future of L4D2 vanilla.

Exploit fixes and PvP enhancements for the original 13 campaigns were done using VScript files.

Caution

Kerry Davis has approved sharing of the non-encrypted VScript files.

You can do whatever you want with them.

However, if you intend to use these files as a template for your own mods (replacing "mapfixes.nut" entirely), please rename "mapspawn.nut" to "mapspawn_addon.nut" which will allow you to not override the base game fixes.

Alternatively, if you're a server admin already settled with your Stripper:Source files, create an empty "mapspawn.nut" file to opt-out!

Organization

Folder Purpose
changelogs Cumulative for each stretch of time before all hotfixes go live.

Includes dedicated credits list. This will be maintained but if you've long been missing, please open a PR.
root Hotfix files for test VPK's that ultimately target going in-game officially.

Please keep all source files and everything else out. Upload original un-changed files before modified files.
tools Some of the lighter-weight custom tools that our team uses, for community reference.

See its README for operational details.

Contributors

Dedicated credits list:

https://github.com/Tsuey/L4D2-Community-Update/blob/master/changelogs/README.md

https://www.l4d.com/laststand/

https://steamcommunity.com/groups/l4d2cut

Videos

Because sometimes watching is just better than reading:

L4D2 Last Stand VS: Directors' Commentary Part 1 (Dead Center 2) Tutorial: See all the Versus Changes in L4D2 Last Stand Update!

Resources

Community Update Testing Initiative (Workshop mirror):

https://steamcommunity.com/sharedfiles/filedetails/?id=1959405608

ShowUpdate() guide and changelog links:

https://steamcommunity.com/workshop/filedetails/discussion/1959405608/2841165820087455557/

MrFailzz' Coop/speedrunner-focused changelog with navmesh changes:

https://hackmd.io/@failzz/rJ5S7EZHw

Valve development thread:

https://steamcommunity.com/app/550/discussions/1/1651043320659915818/

Technical

This is a near-comprehensive, single-file solution to patching or adding content to any map, on any base or mutation mode, in a manner that persists rounds. Includes entity creation functions that maximize code re-use with a focus on user clarity and debugging.

This project had 1 simple goal: to replace Valve's previous inefficient usage of _commentary.txt files to patch maps.

Valve maps only: Survivor and Infected given new activator filters with names consistent across all maps!

New global variables powered by "mapspawn.nut":

g_MapName		Identical to "Director.GetMapName().tolower()"
g_MutaMode		Identical to "Director.GetGameMode()"
g_BaseMode		Identical to "Director.GetGameModeBase()"
g_Chapter		Stores each "friendly name" (only for Valve campaigns)
g_UpdateName		Prefixes "anv_mapfixes" to new entities
g_UpdateRanOnce		Run code only once outside of "mapspawn.nut"

Added new feature-full entity maker and edit functions in "anv_functions.nut":

Almost everything is a String:

* Denotes optional parameters (wherever possible i.e. often Angles)

^ Denotes non-String parameters (floats or integers i.e. "Init state")

? Denotes user-friendly String options

	"Clips who?"	= Everyone | Survivors | SI Players | SI Players and AI | All and Physics
	"Team blocked?"	= Everyone | Survivors | Infected
	"Start state?"	= Apply | Remove
	"Push what?"	= Everything | Survivor | Infected | Physics
	"Hurt who?"	= Everyone | Survivor | Infected | Ghost
	"Option?"	= Duck | Walk | Jump
	"Prop type?"	= dynamic | dynamic_ovr | physics | physics_ovr
	"Shadows?"	= shadow_yes | shadow_no
	"Solidity?"	= solid_yes | solid_no
	"Team climb?"	= 0 (Both) | 1 (Survivor) | 2 (Infected)
	"Axis?"		= x+ | x- | y+ | y-

make_clip		Targetname	Clips who?	^Init state	Box mins	Box maxs	Origin		*Angles

make_brush		Targetname	Box mins	Box maxs	Origin		! Blocks stuff clips don't i.e. bullet hitreg

make_navblock		Targetname	Team blocked?	Start state?	Box mins	Box maxs	Origin

make_trigpush		Targetname	Push what?	^Speed		Push Direction	Box mins	Box maxs	Origin
			*Angles		*Filter Override		! Angles have unknown mild influence but mostly don't work

make_trighurt		Targetname	Hurt who?	Box mins	Box maxs	Origin		! Creates an insta-kill volume

make_trigduck		Targetname	Box mins	Box maxs	Origin		! Auto-crouch into small passages

make_trigmove		Targetname	Option?		Box mins	Box maxs	Origin		! Enforces movement Option

make_prop		Prop type?	Targetname	Model path	Origin		*Angles		*Shadows?	*Solidity?
			*Render color	*^FadeMinDist	*^FadeMaxDist	*^Mass scale
			! Targetname with "_solidify" prefix only for 1:1 copied prop_statics; prop_dynamics with prefix will not render!

make_decal		Texture path	Origin

SafelyExists		Entity handle	! Ensures no crashes or red console errors when deleting or modifying entities

kill_entity		Entity handle	! Used for removing Versus defibrillators or func_breakable skylights to add Ladders

clone_model		Entity handle	! Returns guaranteed-precached "*#" model of any entity that SafelyExists ("null" if not found)

kill_funcinfclip	Desired radius	! Checksum uniquely referring to them to VERY selectively delete bothersome Versus clips

find_ladder		Desired VSSM	*^Radius	! See code documentation on VSSM, bad input will produce nothing

patch_ladder		Desired VSSM	Offset origin	*New normal	! 0 1 0 North | 0 -1 0 South | 1 0 0 West | -1 0 0 East

make_ladder		Ladder name	Desired VSSM	Offset origin	*Offset angles	*New normal	*^Team climb?	*^Radius
			! Only modify Normal if the clone was rotated -- if none, the original's is ported over

InfectedLadders_Spawn	! No parameters: Relies on InfectedLadders() being declared then delay-loads them for ALL gamemodes
			! Infected ladders are relevant to ALL gamemodes since they can be connected to NAV mesh and used by bots!
	DEPRECATED

InfectedHumEnts_Spawn	! No parameters: Relies on InfectedHumEnts() being declared and produces them on Versus / VS Survival / Scavenge
			! Reserved for exception handling; make_prop() already handles the "_solidify" prefixes!
	DEPRECATED

patch_nav_obscured	Origin nav area	! Runs once b/c "OBSCURED" permanently applied

patch_nav_checkpoint	Origin nav area	! Runs once b/c "CHECKPOINT" permanently applied

patch_spawninfront	Origin		Box mins	Box maxs	! Stop Commons spawning inside Survivors in end safe rooms

make_atomizer		Targetname	Origin		Model path	^Delete timer	! Disintegrates Tank/Charger chokepoint blockades

make_axiswarp		Targetname	Axis?		^Offset		Box mins	Box maxs	Origin		! Bandaid fixes

modify_trigfilter	Origin		*Filter name	*Class name

unsolidify_prop		Entity handle	! Un-solidifies a specific dynamic/physics prop

unsolidify_model	Model path	! Un-solidifies all props with this model

SpawnGlobalFilters	! No parameters: Creates a "filter_activator_team" for Survivor & Infected
			! Named "anv_globalfixes_filter_survivor" & "anv_globalfixes_filter_infected"

StringToVector_Valve	String		Delimiter

VectorToString_Valve	^Vector

con_comment		Comment		! Does printl() with \newline after only if "developer() > 0"

devchap			Mode		! Developer indication of if "TUTORIAL", "ALL MODES", "BASE VERSUS", etc.
					! Always notifies of Anniversary Map Fixes update w/ more details if "developer 1"