Left 4 Dead 2/Scripting/Director Scripts

Left 4 Dead 2 Director scripts are vscripts that are primarily used to influence the behavior of the AI Director. They are extensively used for custom finales and gauntlet events.

Usage

Director scripts typically contain a table named DirectorOptions, which contains variables that change up the decision making of the Director. They can be ran / stopped with the following inputs to the info_director entity:

BeginScript <stringRedirectInput/string>

Run a Director script, and parse its DirectorOptions table once. If a Director script is already running and this input is called, the previous Director script automatically stops running.

EndScript

Ends the running script and resets the Director options to either the map's DirectorOption values, or the default settings.

ScriptedPanicEvent <stringRedirectInput/string>

With the script name given it'll be ran as a Scripted Panic Event, which is like a mini finale, so the script should be structured as a finale script.

Note:Scripts used with ScriptedPanicEvent will not work if they are in a subdirectory under thevscriptsfolder, even though you can use subdirectories in other script contexts. If they don't reside under the vscripts folder, they will simply act as a 1 stage 1 second delay Panic Event.

There is too, a CDirector object for VScripts, which its extra functions can be paired for customizing your Director scripts.

General scripts and Onslaughts

Scripts launched with the BeginScript Director input run until a different script is launched, or the script is manually ended with the EndScript input. Unless new Director Options are set, the gameplay continues on as normally.

Onslaught events are created by manipulating the pacing and spawn limits of mobs and special infected.

c2m4_barns_onslaught.nut (with annotations):

Msg("Initiating Onslaught\n");

DirectorOptions <-
{
	// This turns off tanks and witches (when true).
	ProhibitBosses = false
	
	//LockTempo = true

	// Sets the time between mob spawns. Mobs can only spawn when the pacing is in the BUILD_UP state.
	MobSpawnMinTime = 1
	MobSpawnMaxTime = 1

	// How many zombies are in each mob.
	MobMinSize = 30
	MobMaxSize = 30
	MobMaxPending = 30

	// Modifies the length of the SUSTAIN_PEAK and RELAX states to shorten the time between mob spawns.
	SustainPeakMinTime = 5
	SustainPeakMaxTime = 10
	IntensityRelaxThreshold = 0.99
	RelaxMinInterval = 1
	RelaxMaxInterval = 5
	RelaxMaxFlowTravel = 50

	//Special infected options
	SpecialRespawnInterval = 1.0
        SmokerLimit = 2
        JockeyLimit = 0
        BoomerLimit = 0
        HunterLimit = 2
        ChargerLimit = 1

	// Valid spawn locations
	PreferredMobDirection = SPAWN_NO_PREFERENCE
	ZombieSpawnRange = 2000
}

Director.ResetMobTimer()		// Sets the mob spawn timer to 0.
Director.PlayMegaMobWarningSounds()	// Plays the incoming mob sound effect.

Finales and Scripted Panic Events

Finales and Scripted Panic Events consist of a number of different kind of stages set in DirectorOptions.

The Director script for the finale is always loaded from <map name>_finale.nut. Scripted panic events are initiated from the info_director ScriptedPanicEvent input.

Bug:While the trigger_finale entity has an option to specify a script, it is non-functional.  [todo tested in ?]

A stage can be one of 4 types (other values will break the finale and go right to ESCAPE):

• PANIC - A panic event, the value is the number of waves of infected.
• TANK - Spawn a tank(s), the value is the number of tanks to spawn.
• DELAY - A delay, the value is the number of seconds to wait before proceeding to the next stage.
• SCRIPTED (also called ONSLAUGHT) - The value should be the name of a VScript to call or "" (which will do nothing), any bad value here will crash you to the desktop. Your script is responsible for sending an EndCustomScriptedStage input to the director (a goal of your choice, like a certain trigger volume, timer, random value, etc.). trigger_finale input AdvanceFinaleState may also work. Otherwise, the onslaught will not end.

Bug:Sending an EndCustomScriptedStage input ends the Scripted Panic Event immediately.  [todo tested in ?]

Bug:After a Scripted Panic Events ends, the last stage of the event will repeat itself with the lowest valid value. So with PANIC and TANK stages, they will repeat once again with 1x spawn wave / spawn count, while for DELAY and SCRIPTED stages, nothing undesired will happen.  [todo tested in ?]

An example custom finale script:

const ERROR = -1
const PANIC = 0
const TANK = 1
const DELAY = 2
const SCRIPTED = 3 

DirectorOptions <-
{
	//-----------------------------------------------------
	A_CustomFinale_StageCount = 4 // Number of stages. Used for calculating the Versus score.
	B_CustomFinale_StageCount = 4 // Number of stages for the alternate B finale type
	
	A_CustomFinale1 = PANIC
	A_CustomFinaleValue1 = 2	// Two panic waves.
	
	A_CustomFinale2 = DELAY
	A_CustomFinaleValue2 = 12 	// Delay for twelve seconds in addition to stage delay.
	
	A_CustomFinale3 = TANK
	A_CustomFinaleValue3 = 3 	// 3 tanks!
	
	A_CustomFinale4 = DELAY
	A_CustomFinaleValue4 = 6	// Wait some more... and its rescue for Finale Type A!
	
	B_CustomFinale1 = SCRIPTED
	B_CustomFinaleValue1 = "my_challenging_scripted_stage"	// Start of with running a custom scripted stage using a separate script.
	
	B_CustomFinale2 = DELAY
	B_CustomFinaleValue2 = 15	// Wait 15 seconds.
	
	B_CustomFinale3 = TANK
	B_CustomFinaleValue3 = 1 	// One more tank.

	B_CustomFinale4 = DELAY
	B_CustomFinaleValue4 = 10	// Wait ten seconds ... rescue for Finale Type B!

	//-----------------------------------------------------

	CommonLimit = 10
	SpecialRespawnInterval = 25
}

function OnBeginCustomFinaleStage( num, type ) // This function is run at the beginning of every stage.
{
	printl( "Beginning custom finale stage #" + num + " of type: " + type )
	if( num != 1 && DirectorOptions.CommonLimit < 30 )
		DirectorOptions.CommonLimit = num * 5 // Increase commons by 5 linearly with stages.
}

Adaptive Dramatic Pacing

Todo: Add info from [1]

Callbacks

• float GetCustomScriptedStageProgress(float defvalue)

Will be called during FINALE_CUSTOM_SCRIPTED stages. The function should return a value from 0-1 to indicate the completion percentage of the stage. The default time-based completion percentage is passed in as a parameter.

• void OnBeginCustomFinaleStage(int num, int type)

If defined, will be called on every stage change with the number, and type, this is how you would change director options between stages (spawn directions, etc). num refers to the finale stage number passed by the director and type is the stage type (PANIC, TANK, etc.).

Bug:The CEntities object will not work properly in this callback, always returning the default value null every tick until Squirrel terminates the script.  [todo tested in ?]

• function OnChangeFinaleMusic()

Todo: confirm category/working

• function OnChangeFinaleStage(?)

Todo: confirm category/working

DirectorOptions

The DirectorOptions table is used for overriding various Director variables that govern among other things, infected spawning, finale stages and more.

Note:In mode and map scripts, use the SessionOptions table to influence the director instead, or the MutationOptions/MapOptions tables for initial values. The DirectorOptions table can get overwritten or cleared by map events, and writing a new DirectorOptions on a finale will erase the finale script.

Information about some of the Director Options found in the Steam Forums.

Warning: The Fields interact a lot

For instance, SpecialRespawnInterval is "how long after a special of type X dies can we spawn another one." Setting this fairly high (the default) makes a lot of sense in a flow based movement. Whereas if you are building a mutation where you stay in a single place, or where you want a ton of boomers, keeping it set high means that whenever you kill a boomer there will be a long wait until the Director is allowed to spawn a new one. So you'd want to set this value very low if your mod wants to do that.

This brings up the main point: often things don't work as expected, because the DirectorOptions have been set in ways that conflict, causing unexpected behaviors. You can set 3 variables to get what you want, but a 4th may default to something that thwarts you. So it is worth learning about all the options, because it is very easy to over-constrain the Director. When you see odd behavior, think about what other variables and settings might be interfering with your plans.

Warning: NEVER use the = operator when trying to influence the director. Use <-. The difference is semantics. If you use =, it will throw an error if the table slot isn't defined (like if a previous script didn't define it). <-, on the other hand, will create the variable if it does not exist.

Note:The default values are for reference of the values set elsewhere in-game, and do NOT mean that the DirectorOption is set by default.

General

Name	Type	Default value	Description
AddToSpawnTimer
AllowCrescendoEvents	bool
AllowWitchesInCheckpoints	bool
AlwaysAllowWanderers	bool
BuildUpMinInterval
ClearedWandererRespawnChance	int		Percent chance (0-100) that cleared nav areas will get re-populated with wanderers.
DisallowThreatType	int		Disallows boss types from being spawned in threat areas in coop mode. Valid flags are: ZOMBIE_WITCH, ZOMBIE_TANK
FallenSurvivorPotentialQuantity	int		How many fallen survivors can spawn in total. Todo: Confirm if this still works (in all modes) and is not an obsolete key.
FallenSurvivorSpawnChance	float		[0...1] Todo: Confirm if this still works (in all modes) and is not an obsolete key.
FarAcquireRange	int	2500	The maximum range common infected can spot survivors.
NearAcquireRange	int	200	The range where common infected can spot survivors in the least amount of time.
FarAcquireTime	float	5.0	The time it takes for an infected to acquire the survivor after spotting them at maximum range.
NearAcquireTime	float	0.5	The time it takes for an infected to acquire the survivor after spotting them at minimum range.
GasCansOnBacks	bool		Puts the Hard Rain diesel cans on the survivors backs.
IgnoreNavThreatAreas	bool		Likely prevents bosses from spawning along the nav. Todo: confirm category/working
InfectedFlags	int		Applies flags to newly spawned infected. Valid flags are: INFECTED_FLAG_CANT_SEE_SURVIVORS, INFECTED_FLAG_CANT_HEAR_SURVIVORS, INFECTED_FLAG_CANT_FEEL_SURVIVORS
IntensityRelaxAllowWanderersThreshold	float
IntensityRelaxThreshold	float		All survivors must be below this intensity before a Peak is allowed to switch to Relax (in addition to the normal peak timer)
JournalString	string		Todo: Used in holdout, seems to build some kind of table.
LockTempo	bool	false	The horde spawning pacing consists of: BUILD_UP -> spawn horde -> SUSTAIN_PEAK -> RELAX -> BUILD_UP again. Setting LockTempo = true removes the "SUSTAIN_PEAK -> RELAX -> BUILD_UP" bit making your hordes spawn constantly without a delay.
MobRechargeRate	int		Guessing it's the speed at which a mob regenerates (i.e. next mob).
MobSpawnMaxTime	int	180-240	Maximum time in seconds between mob spawns. Default value depends on difficulty.
MobSpawnMinTime	int	90-120	Minimum time in seconds between mob spawns. Default value depends on difficulty.
MusicDynamicMobScanStopSize	int		When fewer than this many of a mob are in play, the mob music stops.
MusicDynamicMobSpawnSize	int	25	Spawning a mob this large will play the mob music.
MusicDynamicMobStopSize	int		When a mob gets to this size, the Director thinks about stopping the mob music.
NumReservedWanderers	int		The number of wandering infected that cannot be despawned for mobs.
NoMobSpawns	bool	false	Prevents new mobs from spawning. Does not reset the timer, and already pending infected still spawn.
PanicForever	int		This seems to only work in gauntlets.
PausePanicWhenRelaxing	bool		Todo: confirm category/working
PreferredMobDirection	int		Valid flags are: SPAWN_ABOVE_SURVIVORS, SPAWN_ANYWHERE, SPAWN_BEHIND_SURVIVORS, SPAWN_FAR_AWAY_FROM_SURVIVORS, SPAWN_IN_FRONT_OF_SURVIVORS, SPAWN_LARGE_VOLUME, SPAWN_NEAR_IT_VICTIM, SPAWN_NO_PREFERENCE Note:SPAWN_NEAR_IT_VICTIM does not exist before a finale and will cause an error, so I'm assuming the director picks someone as IT when the finale starts. Note:SPAWN_LARGE_VOLUMEis what makes infected be a considerable distance away, like on Dead Center finale. For technically familiar people thinking its too vague,SPAWN_LARGE_VOLUME makes infected spawning use a big imaginary box, having its bounds set by commands. The Director also prefers to spawn the infected in multiple spawn areas, and always ensures its at least quite a distance away from the survivors.
PreferredMobPosition	Vector		Todo: confirm category/working; used in dash
PreferredMobPositionRange	int		Todo: confirm category/working; used in dash
PreferredSpecialDirection	int		Note:The same values for PreferredMobDirection appear to work, BUT the following have also been seen, it is unknown if it's just redundancy. SPAWN_SPECIALS_ANYWHERE, SPAWN_SPECIALS_IN_FRONT_OF_SURVIVORS
ProhibitBosses	bool	false	Prohibits tanks and witches from being spawned by the Director. Campaign modes only.
RelaxMaxFlowTravel	float		How far the survivors can advance along the flow before transitioning from RELAX to BUILD_UP.
RelaxMaxInterval	float		Maximum seconds to spend in the RELAX tempo.
RelaxMinInterval	float		Minimum seconds to spend in the RELAX tempo.
ShouldAllowMobsWithTank	bool	false	Whether to allow spawning of infected mobs (except Boomer / Bile Bomb spawned mobs) when a tank is in play. Campaign modes only.
ShouldAllowSpecialsWithTank	bool	false	Whether to allow spawning of Special Infected when a tank is in play. Campaign modes only.
ShouldConstrainLargeVolumeSpawn	bool	false	SPAWN_LARGE_VOLUME only. Makes the Director have a bias for spawning infected closer to the survivors, instead of a considerable distance away.
ShouldIgnoreClearStateForSpawn	bool		Todo: confirm category/working
SpawnBehindSurvivorsDistance			Appears to require PreferredSpecialDirection = SPAWN_BEHIND_SURVIVORS
SpecialInfectedAssault	bool		Todo: confirm category/working
SpecialInitialSpawnDelayMax	float	60.0	Specials cannot spawn for this many time maximum after the survivors exited the saferoom. Campaign modes only.
SpecialInitialSpawnDelayMin	float	30.0	Specials cannot spawn for this many time minimum after the survivors exited the saferoom. Campaign modes only.
SpecialRespawnInterval	float	45 in Campaign, 20 in Versus	Time in seconds before a Special Infected slot can respawn an infected.
SurvivorMaxIncapacitatedCount	int		Maximum amount of survivor incapacitating before dying.
SustainPeakMaxTime	float		in minutes
SustainPeakMinTime	float		in minutes
TankHitDamageModifierCoop	float	1.0	Modifies the damage dealt by Tanks.
TankRunSpawnDelay	float	15	in seconds (mutation19.nut Taaannnkk!) Todo: confirm category
TempHealthDecayRate	float	0.27	0.27 is the pain_pills_decay_rate default, higher values equals quicker decay.
WanderingZombieDensityModifier	float	1.0	Multiplier for the amount of wandering infected.
ZombieDiscardRange	int	2500	Any CI beyond this point will be deleted, while any AI-controlled SI will suicide.
ZombieDontClear
ZombieSpawnInFog	bool	false	Allows zombies to spawn in in line-of-sight of survivors in fogged areas.
ZombieSpawnRange	float		Maximum distance from the survivors that the infected can spawn.
ZombieTankHealth	int		Sets the amount of health a tank spawns with.

Spawning limits

Name	Type	Default value	Description
BileMobSize	int		Number of commons that spawn when a bile bomb is thrown or a survivor is hit by vomit. Only works if scripted mode is enabled, a custom finale is active, or a scavenge finale is active. Found in Dead Center and The Sacrifice finales.
BoomerLimit	int	1	Maximum number of Boomers allowed to be in play simultaneously.
ChargerLimit	int	1	Maximum number of chargers allowed to be in play simultaneously.
CommonLimit	int	30	Maximum number of commons allowed to be in play simultaneously.
DominatorLimit	int		Maximum number of Hunters, Smokers, Jockeys and Chargers allowed to be in play simultaneously.
HunterLimit	int	1	Maximum number of Hunters allowed to be in play simultaneously.
JockeyLimit	int	1	Maximum number of Jockeys allowed to be in play simultaneously.
MaxSpecials	int	2	Maximum number of Director spawned Special Infected allowed to be in play simultaneously.
MegaMobSize	int		The amount of total infected spawned during a panic event.
MobMaxPending	int		How many infected can be left pending to spawn when the mob size is larger than CommonLimit.
MobMaxSize	int	30	Maximum amount of infected that can spawn in a mob.
MobMinSize	int	10	Minimum amount of infected that can spawn in a mob.
MobSpawnSize	int		Static amount of infected in a mob. Likely overrides MobMinSize and MobMinSize.
PreTankMobMax	int		Todo: confirm category/working; possibly gauntlet finale specific
SmokerLimit	bool	1	Maximum number of Smokers allowed to be in play simultaneously.
SpitterLimit	int	1	Maximum number of Spitters allowed to be in play simultaneously.
TankLimit	int	1	Maximum number of Tanks allowed to be in play simultaneously.
WitchLimit	int	1	Maximum number of Witches allowed to be in play simultaneously.1

EMS Stage Specific

^[Todo]

See L4D2_EMS/Appendix:_Spawning_Infected

Name	Type	Default value	Description
PanicSpecialsOnly	bool		The Panic should end when we finish with Specials, not wait for the MegaMob.
PanicWavePauseMax	float		Todo: confirm category/working
PanicWavePauseMin	float		Todo: confirm category/working
ScriptedStageType	int		The type of stage to run next. See L4D2_EMS/StageTypeAppendix for a description of stage types.
ScriptedStageValue	int		Dependant on the stage type.
SpawnDirectionCount			Todo: confirm category/working
SpawnDirectionMask	int		A bitfield (using SPAWNDIR_N, _NE, _E, etc) of directors to spawn from _relative to_ a map entity named Compass in your map. Designed for Survival-like game modes. See L4D2_EMS/Appendix:_Spawning_Infected.
SpawnSetPosition	Vector		The center point of the area infected can spawn in, when SpawnSetRule is set to SPAWN_POSITIONAL.
SpawnSetRadius	int		How far from the center point infected can spawn, when SpawnSetRule is set to SPAWN_POSITIONAL.
SpawnSetRule	int		Overrides the mode of spawning used. Seems to be non-functional in finales. Valid flags are: SPAWN_ANYWHERE, SPAWN_FINALE, SPAWN_BATTLEFIELD, SPAWN_SURVIVORS, SPAWN_POSITIONAL
TotalBoomers	int		Number of Boomers allowed in a wave.
TotalChargers	int		Number of Chargers allowed in a wave.
TotalHunters	int		Number of Hunters allowed in a wave.
TotalJockeys	int		Number of Jockeys allowed in a wave.
TotalSmokers	int		Number of Smokers allowed in a wave.
TotalSpecials	int		Total number of Special Infected allowed in a wave.
TotalSpitters	int		Number of Spitters allowed in a wave.

• function void g_ModeScript::GetNextStage()

Called by the director when it wants a new stage. It can be forced with Director.ForceNextStage()

Finale Specific/Related

A normal finale consists of X number of stages. Some variables in DirectorOptions can only be used during finales. Multiple staged events can be defined in the same script, with the Options starting with A_, B_, C_ etc.

Name	Type	Default value	Description
[A-Z]_CustomFinale_StageCount	int		Number of stages. Needs to be set for Versus scoring to function properly.
[A-Z]_CustomFinaleX	int		Stage type (enumerated PANIC, SCRIPTED (AKA ONSLAUGHT), DELAY, TANK), where X is the corresponding stage number. Usable in scripted panic events.
[A-Z]_CustomFinaleValueX	*		Value depends on the stage type above. Usable in scripted panic events.
[A-Z]_CustomFinaleMusicX	string		Soundscript entry to play. For instance, A_CustomFinaleMusic1 = "C2M5.BadManTank2". Note, Dark Carnival - Concert finale does not use this method! It instead opted to use entities (ambient_music, math_counter and info_director) within the map instead for playing music. In the c2m5_concert_finale.nut, You can see lines such asA_CustomFinaleMusic4 = "", suggesting that no song is played automatically via script.
EnforceFinaleNavSpawnRules	bool		Possibly used to enforce the finale spawning behavior without running a finale. Todo: confirm category/working
HordeEscapeCommonLimit			Number of commons allowed in the escape stage.
EscapeSpawnTanks	bool		Whether to spawn tanks in the escape sequence. Todo: possibly EMS stage related
MinimumStageTime	int		The minimum amount of time a SCRIPTED stage is allowed to run before ending. Unavailable for Scripted Panic Events when it should been, unfortunately.

Gauntlet Specific/Related

These options are specific to Gauntlet finales. Most of these can be found in director_gauntlet.nut

Name	Type	Default value	Description
CustomTankKiteDistance	int	3000	Controls when Gauntlet's Tank should appear if a survivor reaches this far, in flow distance.

Movement Bonus related options

The Movement Bonus successively increases the delay between hordes when the survivors are not making progress toward the Gauntlet goal. The Current Bonus value ticks down every second, allows a horde to spawn when it reaches 0. When a horde spawns the Current Bonus is reset to the Movement Bonus value. The Movement Bonus increases at set intervals, and is reset when the survivors cross the Movement Threshold, which is then incremented. Use director_debug 1 to see the values.

Name	Type	Default value	Description
GauntletMovementThreshold	float	500.0	The amount of flow units the survivors can advance before the Movement Bonus is reset.
GauntletMovementTimerLength	float	5.0	The interval between each Movement Bonus increase, in seconds.
GauntletMovementBonus	float	2.0	The initial value, and the amount the movement Bonus increases each interval, in seconds.
GauntletMovementBonusMax	float	30.0	The maximum value that the Movement Bonus can reach.

Versus Specific

Name	Type	Default value	Description
TankHitDamageModifierVersus	float	1.0
ZombieGhostDelayMax	int	30	Maximum time in seconds until allowing player infected to respawn.
ZombieGhostDelayMin	int	20	Minimum time in seconds until allowing player infected to respawn.

Scavenge Specific/Related

Name	Type	Default value	Description
ScavengeClusterBonusTime	float		Todo: confirm category/working
ScavengeRoundInitialTime	float		Todo: confirm category/working
ScavengeScoreBonusTime	float		(used in mutation13.nut Follow the Liter)

Survival Specific/Related

Name	Type	Default value	Description
SurvivalSetupTime	float		(Used in mutation15.nut for Survival Versus with setup time of 90 seconds)

Mutation Specific/Related

Some of these values are mutation specific values of the global ones (cm_CommonLimit,cm_MaxSpecials, etc.), so use them if you are making a mutation, in case any map scripts are changing the global values.

Name	Type	Default value	Description
cm_AggressiveSpecials	bool	true
cm_AllowPillConversion	bool	true	Allows pills to be converted to health kits.
cm_AllowSurvivorRescue	bool
cm_AllowTeamSwap	bool	true	Allows swapping teams. Note:Appears to be non-functional.
cm_AutoReviveFromSpecialIncap	bool	false	Instantly revives a survivor when incapacitated by a Special Infected. Bug:Doesn't work if a player isn't incapacitated by being dominated.  [todo tested in ?]
cm_AutoSpawnInfectedGhosts	bool
cm_BaseCommonAttackDamage
cm_BaseSpecialLimit	int
cm_CommonLimit	int
cm_DominatorLimit	int
cm_FirstManOut	int	false	Ends the escape when the first survivor reaches the escape vehicle.
cm_frustrationTimer
cm_HeadshotOnly
cm_HealingGnome
cm_InfiniteFuel			(mutation7.nut Chainsaw Massacre)
cm_MaxSpecials
cm_NoRescueClosets
cm_NoSurvivorBots
cm_ProhibitBosses
cm_ShouldEscortHumanPlayers
cm_ShouldHurry
cm_SingleScavengeCluster			Used for scavenge cans to spawn one-by-one.
cm_SpecialRespawnInterval
cm_SpecialSlotCountdownTime
cm_SpecialsRetreatToCover
cm_TankLimit
cm_TankRun			Used in Taaank! mutation (mutation19.nut).
cm_TempHealthOnly
cm_VIPTarget
cm_WanderingZombieDensityModifier
cm_WitchLimit

Defunct options

These don't seem to be read by the director.

Name	Type	Default value	Description
ActiveChallenge	bool	false	Activates mutation mode. Seems to be obsolete with the EMS update.
MegaMobMaxSize	int		Maximum amount of total infected spawned during a panic event. Doesn't work 2014.04.29
MegaMobMinSize	int		Minimum amount of total infected spawned during a panic event. Doesn't work 2014.04.29

Hook Functions

These functions are placed in the DirectorOptions table, and get called at map load.

Function	Signature	Description
AllowFallenSurvivorItem	bool AllowFallenSurvivorItem(string classname)	Returns true or false if Fallen Survivors are allowed to carry the given classname.
AllowWeaponSpawn	bool AllowWeaponSpawn(string classname)	Returns true or false if the given classname is allowed to spawn, used by several mutations.
ConvertWeaponSpawn	string ConvertWeaponSpawn(string classname)	Converts a weapon spawn of given classname to another, used by several mutations.
ConvertZombieClass	int ConvertZombieClass(infectedClass)	Converts one spawn into another, used by the Taaannnk!! mutation (mutation19.nut).
GetDefaultItem	string GetDefaultItem(index)	Repeatedly called with incrementing indices. Return a string of a weapon name to make it a default item for survivors, or 0 to end the iteration.
ShouldAvoidItem	bool ShouldAvoidItem(string classname)	Todo: Probably a bot related function or spawn related
ShouldPlayBossMusic	bool ShouldPlayBossMusic(index)	Returns true or false if the music index is allowed to play.

Enumerations

• Director Enumerations
  Note:These are (or some are) script specific, hence the duplicate values.
  • ALLOW_BASH_ALL = 0
  • ALLOW_BASH_NONE = 2
  • ALLOW_BASH_PUSHONLY = 1
  • BOT_CANT_FEEL = 4
  • BOT_CANT_HEAR = 2
  • BOT_CANT_SEE = 1
  • BOT_CMD_ATTACK = 0
  • BOT_CMD_MOVE = 1
  • BOT_CMD_RESET = 3
  • BOT_CMD_RETREAT = 2
  • BOT_QUERY_NOTARGET = 1
  • DMG_BLAST = 64
  • DMG_BLAST_SURFACE = 134217728
  • DMG_BUCKSHOT = 536870912
  • DMG_BULLET = 2
  • DMG_BURN = 8
  • DMG_HEADSHOT = 1073741824
  • DMG_MELEE = 2097152
  • DMG_STUMBLE = 33554432
  • FINALE_CUSTOM_CLEAROUT = 11
  • FINALE_CUSTOM_DELAY = 10
  • FINALE_CUSTOM_PANIC = 7
  • FINALE_CUSTOM_SCRIPTED = 9
  • FINALE_CUSTOM_TANK = 8
  • FINALE_FINAL_BOSS = 5
  • FINALE_GAUNTLET_1 = 0
  • FINALE_GAUNTLET_2 = 3
  • FINALE_GAUNTLET_BOSS = 16
  • FINALE_GAUNTLET_BOSS_INCOMING = 15
  • FINALE_GAUNTLET_ESCAPE = 17
  • FINALE_GAUNTLET_HORDE = 13
  • FINALE_GAUNTLET_HORDE_BONUSTIME = 14
  • FINALE_GAUNTLET_START = 12
  • FINALE_HALFTIME_BOSS = 2
  • FINALE_HORDE_ATTACK_1 = 1
  • FINALE_HORDE_ATTACK_2 = 4
  • FINALE_HORDE_ESCAPE = 6
  • HUD_FAR_LEFT = 7
  • HUD_FAR_RIGHT = 8
  • HUD_FLAG_ALIGN_CENTER = 512
  • HUD_FLAG_ALIGN_LEFT = 256
  • HUD_FLAG_ALIGN_RIGHT = 768
  • HUD_FLAG_ALLOWNEGTIMER = 128
  • HUD_FLAG_AS_TIME = 16
  • HUD_FLAG_BEEP = 4
  • HUD_FLAG_BLINK = 8
  • HUD_FLAG_COUNTDOWN_WARN = 32
  • HUD_FLAG_NOBG = 64
  • HUD_FLAG_NOTVISIBLE = 16384
  • HUD_FLAG_POSTSTR = 2
  • HUD_FLAG_PRESTR = 1
  • HUD_FLAG_TEAM_INFECTED = 2048
  • HUD_FLAG_TEAM_MASK = 3072
  • HUD_FLAG_TEAM_SURVIVORS = 1024
  • HUD_LEFT_BOT = 1
  • HUD_LEFT_TOP = 0
  • HUD_MID_BOT = 3
  • HUD_MID_BOX = 9
  • HUD_MID_TOP = 2
  • HUD_PRINTNOTIFY = 1
  • HUD_PRINTCONSOLE = 2
  • HUD_PRINTTALK = 3
  • HUD_PRINTCENTER = 4
  • HUD_RIGHT_BOT = 5
  • HUD_RIGHT_TOP = 4
  • HUD_SCORE_1 = 11
  • HUD_SCORE_2 = 12
  • HUD_SCORE_3 = 13
  • HUD_SCORE_4 = 14
  • HUD_SCORE_TITLE = 10
  • HUD_SPECIAL_COOLDOWN = 4
  • HUD_SPECIAL_MAPNAME = 6
  • HUD_SPECIAL_MODENAME = 7
  • HUD_SPECIAL_ROUNDTIME = 5
  • HUD_SPECIAL_TIMER0 = 0
  • HUD_SPECIAL_TIMER1 = 1
  • HUD_SPECIAL_TIMER2 = 2
  • HUD_SPECIAL_TIMER3 = 3
  • HUD_TICKER = 6
  • INFECTED_FLAG_CANT_FEEL_SURVIVORS = 32768
  • INFECTED_FLAG_CANT_HEAR_SURVIVORS = 16384
  • INFECTED_FLAG_CANT_SEE_SURVIVORS = 8192
  • IN_ATTACK = 1
  • IN_ATTACK2 = 2048
  • IN_BACK = 16
  • IN_CANCEL = 64
  • IN_DUCK = 4
  • IN_FORWARD = 8
  • IN_JUMP = 2
  • IN_LEFT = 512
  • IN_RELOAD = 8192
  • IN_RIGHT = 1024
  • IN_USE = 32
  • SCRIPTED_SPAWN_BATTLEFIELD = 2
  • SCRIPTED_SPAWN_FINALE = 0
  • SCRIPTED_SPAWN_POSITIONAL = 3
  • SCRIPTED_SPAWN_SURVIVORS = 1
  • SCRIPT_SHUTDOWN_EXIT_GAME = 4
  • SCRIPT_SHUTDOWN_LEVEL_TRANSITION = 3
  • SCRIPT_SHUTDOWN_MANUAL = 0
  • SCRIPT_SHUTDOWN_ROUND_RESTART = 1
  • SCRIPT_SHUTDOWN_TEAM_SWAP = 2
  • SPAWNDIR_E = 4
  • SPAWNDIR_N = 1
  • SPAWNDIR_NE = 2
  • SPAWNDIR_NW = 128
  • SPAWNDIR_S = 16
  • SPAWNDIR_SE = 8
  • SPAWNDIR_SW = 32
  • SPAWNDIR_W = 64
  • SPAWN_ABOVE_SURVIVORS = 6
  • SPAWN_ANYWHERE = 0
  • SPAWN_BATTLEFIELD = 2
  • SPAWN_BEHIND_SURVIVORS = 1
  • SPAWN_FAR_AWAY_FROM_SURVIVORS = 5
  • SPAWN_FINALE = 0
  • SPAWN_IN_FRONT_OF_SURVIVORS = 7
  • SPAWN_LARGE_VOLUME = 9
  • SPAWN_NEAR_IT_VICTIM = 2
  • SPAWN_NEAR_POSITION = 10
  • SPAWN_NO_PREFERENCE = -1
  • SPAWN_POSITIONAL = 3
  • SPAWN_SPECIALS_ANYWHERE = 4
  • SPAWN_SPECIALS_IN_FRONT_OF_SURVIVORS = 3
  • SPAWN_SURVIVORS = 1
  • SPAWN_VERSUS_FINALE_DISTANCE = 8
  • STAGE_CLEAROUT = 4
  • STAGE_DELAY = 2
  • STAGE_ESCAPE = 7
  • STAGE_NONE = 9
  • STAGE_PANIC = 0
  • STAGE_RESULTS = 8
  • STAGE_SETUP = 5
  • STAGE_TANK = 1
  • TIMER_COUNTDOWN = 2
  • TIMER_COUNTUP = 1
  • TIMER_DISABLE = 0
  • TIMER_SET = 4
  • TIMER_STOP = 3
  • TRACE_MASK_ALL = -1
  • TRACE_MASK_NPC_SOLID = 33701899
  • TRACE_MASK_PLAYER_SOLID = 33636363
  • TRACE_MASK_SHOT = 1174421507
  • TRACE_MASK_VISIBLE_AND_NPCS = 33579137
  • TRACE_MASK_VISION = 33579073
  • UPGRADE_EXPLOSIVE_AMMO = 1
  • UPGRADE_INCENDIARY_AMMO = 0
  • UPGRADE_LASER_SIGHT = 2
  • ZOMBIE_BOOMER = 2
  • ZOMBIE_CHARGER = 6
  • ZOMBIE_HUNTER = 3
  • ZOMBIE_JOCKEY = 5
  • ZOMBIE_NORMAL = 0
  • ZOMBIE_SMOKER = 1
  • ZOMBIE_SPITTER = 4
  • ZOMBIE_TANK = 8
  • ZOMBIE_WITCH = 7
  • ZSPAWN_MOB = 10
  • ZSPAWN_MUDMEN = 12
  • ZSPAWN_WITCHBRIDE = 11

See also

• L4D2 Vscripts
• List of L4D2 Script Functions
• L4D2 Vscript Examples
• Extended Mutation System
• L4D2 Level Design/Boss Prohibition
• trigger_finale
• info_director
• vscripts