Engine API Quick Reference

Condensed single-page reference for the most commonly used DayZ engine methods. For detailed explanations and examples, see the full chapters linked in each section header. Signatures below omit declaration modifiers such as proto native; ellipses explicitly mark abbreviated parameter lists. Checked against the supplied extraction on 2026-09-11; release identity is unconfirmed and examples were not compiled.

Entity Methods
Health & Damage
Type Checking
Inventory
Entity Creation & Deletion
Player Methods
Vehicle Methods
Weather Methods
File I/O Methods
Timer & CallQueue Methods
Widget Creation Methods
RPC / Networking Methods
Math Constants & Methods
Vector Methods
Global Functions
Mission Hooks
Action System

Entity Methods

Full reference: Chapter 6.1: Entity System

Position & Orientation (Object)

Method	Signature	Description
`GetPosition`	`vector GetPosition()`	World position
`SetPosition`	`void SetPosition(vector pos)`	Set world position
`GetOrientation`	`vector GetOrientation()`	Yaw, pitch, roll in degrees
`SetOrientation`	`void SetOrientation(vector ori)`	Set yaw, pitch, roll
`GetDirection`	`vector GetDirection()`	Forward direction vector
`SetDirection`	`void SetDirection(vector dir)`	Set forward direction
`GetScale`	`float GetScale()`	Current scale
`SetScale`	`void SetScale(float scale)`	Set scale

Transform (IEntity)

Method	Signature	Description
`GetOrigin`	`vector GetOrigin()`	World position (engine level)
`SetOrigin`	`void SetOrigin(vector orig)`	Set world position (engine level)
`GetYawPitchRoll`	`vector GetYawPitchRoll()`	Rotation as yaw/pitch/roll
`GetTransform`	`void GetTransform(out vector mat[4])`	Full 4x3 transform matrix
`SetTransform`	`void SetTransform(vector mat[4])`	Set full transform
`VectorToParent`	`vector VectorToParent(vector vec)`	Local direction to world
`CoordToParent`	`vector CoordToParent(vector coord)`	Local point to world
`VectorToLocal`	`vector VectorToLocal(vector vec)`	World direction to local
`CoordToLocal`	`vector CoordToLocal(vector coord)`	World point to local

Hierarchy (IEntity)

Method	Signature	Description
`AddChild`	`bool AddChild(notnull IEntity child, int pivot, bool positionOnly = false)`	Attach child to bone
`RemoveChild`	`bool RemoveChild(notnull IEntity child, bool keepTransform = false)`	Detach child
`GetParent`	`IEntity GetParent()`	Parent entity or null
`GetChildren`	`IEntity GetChildren()`	First child entity
`GetSibling`	`IEntity GetSibling()`	Next sibling entity

Display Info (Object)

Method	Signature	Description
`GetType`	`string GetType()`	Config class name (e.g., `"AKM"`)
`GetDisplayName`	`string GetDisplayName()`	Localized display name
`IsKindOf`	`bool IsKindOf(string type)`	Check config inheritance

Bone Positions (Object)

Method	Signature	Description
`GetBonePositionLS`	`vector GetBonePositionLS(int pivot)`	Bone position in local space
`GetBonePositionMS`	`vector GetBonePositionMS(int pivot)`	Bone position in model space
`GetBonePositionWS`	`vector GetBonePositionWS(int pivot)`	Bone position in world space

Config Access (Object)

Method	Signature	Description
`ConfigGetBool`	`bool ConfigGetBool(string entry)`	Read bool from config
`ConfigGetInt`	`int ConfigGetInt(string entry)`	Read int from config
`ConfigGetFloat`	`float ConfigGetFloat(string entry)`	Read float from config
`ConfigGetString`	`string ConfigGetString(string entry)`	Read string from config
`ConfigGetTextArray`	`void ConfigGetTextArray(string entry, out TStringArray values)`	Read string array
`ConfigIsExisting`	`bool ConfigIsExisting(string entry)`	Check if config entry exists

Health & Damage

Full reference: Chapter 6.1: Entity System

Method	Signature	Description
`GetHealth`	`float GetHealth(string zone, string type)`	Get health value
`GetMaxHealth`	`float GetMaxHealth(string zone, string type)`	Get max health
`SetHealth`	`void SetHealth(string zone, string type, float value)`	Set health
`SetHealthMax`	`void SetHealthMax(string zone = "", string type = "")`	Set to max
`AddHealth`	`void AddHealth(string zone, string type, float value)`	Add health
`DecreaseHealth`	`void DecreaseHealth(string zone, string type, float value, bool auto_delete)`	Reduce health; native three-argument overload also exists
`SetAllowDamage`	`void SetAllowDamage(bool val)`	Enable/disable damage
`GetAllowDamage`	`bool GetAllowDamage()`	Check if damage allowed
`IsAlive`	`bool IsAlive()`	Alive check (defined on Object, works on any Object subclass)
`ProcessDirectDamage`	`void ProcessDirectDamage(int dmgType, EntityAI source, string component, string ammoType, vector modelPos, float coef = 1.0, int flags = 0)`	Apply damage (defined on Object)

Common zone/type pairs: ("", "Health") global, ("", "Blood") player blood, ("", "Shock") player shock, ("Engine", "Health") vehicle engine.

Type Checking

Method	Class	Description
`IsMan()`	Object	Is this a player?
`IsBuilding()`	Object	Is this a building?
`IsTransport()`	Object	Is this a vehicle?
`IsDayZCreature()`	Object	Is this a creature (zombie/animal)?
`IsKindOf(string)`	Object	Config inheritance check
`IsItemBase()`	Object	Is this an inventory item?
`IsWeapon()`	Object	Is this a weapon?
`IsMagazine()`	Object	Is this a magazine?
`IsClothing()`	Object	Is this clothing?
`IsFood()`	Object	Is this food?
`Class.CastTo(out, obj)`	Class	Safe downcast (returns bool)
`ClassName.Cast(obj)`	Class	Inline cast (returns null on failure)

Inventory

Full reference: Chapter 6.1: Entity System

Method	Signature	Description
`GetInventory`	`GameInventory GetInventory()`	Get inventory component (EntityAI)
`CreateInInventory`	`EntityAI CreateInInventory(string type)`	Create in attachment or cargo slot
`CreateEntityInCargo`	`EntityAI CreateEntityInCargo(string type)`	Create item in cargo
`CreateAttachment`	`EntityAI CreateAttachment(string type)`	Create item as attachment
`EnumerateInventory`	`bool EnumerateInventory(InventoryTraversalType tt, out array<EntityAI> items)`	List all items
`CountInventory`	`int CountInventory()`	Count items
`HasEntityInInventory`	`bool HasEntityInInventory(notnull EntityAI item)`	Check for item
`AttachmentCount`	`int AttachmentCount()`	Number of attachments
`GetAttachmentFromIndex`	`EntityAI GetAttachmentFromIndex(int idx)`	Get attachment by index
`FindAttachmentBySlotName`	`EntityAI FindAttachmentBySlotName(string slot_name)`	EntityAI method (not GameInventory)

Entity Creation & Deletion

Full reference: Chapter 6.1: Entity System

Method	Signature	Description
`CreateObject`	`Object GetGame().CreateObject(string type, vector pos, bool local = false, bool ai = false, bool physics = true)`	Create entity
`CreateObjectEx`	`Object GetGame().CreateObjectEx(string type, vector pos, int flags, int rotation = RF_DEFAULT)`	Create with ECE flags
`ObjectDelete`	`void GetGame().ObjectDelete(Object obj)`	Native object deletion request
`ObjectDeleteOnClient`	`void GetGame().ObjectDeleteOnClient(Object obj)`	Client-only deletion
`Delete`	`void obj.Delete()`	Deferred deletion; EntityAI can delay while inventory operations are pending

Common ECE Flags

Flag	Value	Description
`ECE_NONE`	`0`	No special behavior
`ECE_CREATEPHYSICS`	`1024`	Create collision
`ECE_INITAI`	`2048`	Initialize AI
`ECE_EQUIP`	`24576`	Spawn with attachments + cargo
`ECE_PLACE_ON_SURFACE`	`1060`	Physics + path + trace
`ECE_LOCAL`	`1073741824`	Local creation (not replicated)
`ECE_NOLIFETIME`	`4194304`	Do not set lifetime at creation; not an absolute no-deletion guarantee
`ECE_KEEPHEIGHT`	`524288`	Keep Y position

Player Methods

Full reference: Chapter 6.14: Player System

Method	Signature	Description
`GetIdentity`	`PlayerIdentity GetIdentity()`	Player identity object
`GetIdentity().GetName()`	`string GetName()`	Steam/platform display name
`GetIdentity().GetId()`	`string GetId()`	Hashed/platform unique ID; not necessarily BattlEye GUID
`GetIdentity().GetPlainId()`	`string GetPlainId()`	Steam64 ID
`GetIdentity().GetPlayerId()`	`int GetPlayerId()`	Session player ID
`GetHumanInventory().GetEntityInHands()`	`EntityAI GetEntityInHands()`	Item in hands
`GetDrivingVehicle`	`EntityAI GetDrivingVehicle()`	Vehicle being driven
`IsAlive`	`bool IsAlive()`	Alive check
`IsUnconscious`	`bool IsUnconscious()`	Unconscious check
`IsRestrained`	`bool IsRestrained()`	Restrained check
`IsInVehicle`	`bool IsInVehicle()`	In vehicle check
`SpawnEntityOnGroundOnCursorDir`	`EntityAI SpawnEntityOnGroundOnCursorDir(string type, float dist)`	Spawn in front of player

Vehicle Methods

Full reference: Chapter 6.2: Vehicle System

Crew (Transport)

Method	Signature	Description
`CrewSize`	`int CrewSize()`	Total seat count
`CrewMember`	`Human CrewMember(int idx)`	Get human at seat
`CrewMemberIndex`	`int CrewMemberIndex(Human member)`	Get seat of human
`CrewGetOut`	`Human CrewGetOut(int posIdx)`	Force eject from seat
`CrewDeath`	`void CrewDeath(int idx)`	Handle crew death; do not treat as a documented damage API

Engine (Car)

Method	Signature	Description
`EngineIsOn`	`bool EngineIsOn()`	Engine running?
`EngineStart`	`void EngineStart()`	Start engine
`EngineStop`	`void EngineStop()`	Stop engine
`EngineGetRPM`	`float EngineGetRPM()`	Current RPM
`EngineGetRPMRedline`	`float EngineGetRPMRedline()`	Redline RPM
`GetGear`	`int GetGear()`	Current gear
`GetSpeedometer`	`float GetSpeedometer()`	Speed in km/h

Fluids (Car)

Method	Signature	Description
`GetFluidCapacity`	`float GetFluidCapacity(CarFluid fluid)`	Max capacity
`GetFluidFraction`	`float GetFluidFraction(CarFluid fluid)`	Fill level 0.0-1.0
`Fill`	`void Fill(CarFluid fluid, float amount)`	Add fluid
`Leak`	`void Leak(CarFluid fluid, float amount)`	Remove fluid
`LeakAll`	`void LeakAll(CarFluid fluid)`	Drain all fluid

Common CarFluid values: FUEL, OIL, BRAKE, COOLANT; the declaration also reserves USER1–USER4 for modding.

Controls (Car)

Method	Signature	Description
`SetBrake`	`void SetBrake(float value, float unused0 = 0, bool unused1 = false)`	0.0-1.0
`SetHandbrake`	`void SetHandbrake(float value)`	0.0-1.0
`SetSteering`	`void SetSteering(float value, bool unused0 = false)`	Steering input
`SetThrottle`	`void SetThrottle(float value)`	0.0-1.0 throttle (replaces obsolete `SetThrust`)

Weather Methods

Full reference: Chapter 6.3: Weather System

Access

Method	Signature	Description
`GetGame().GetWeather()`	`Weather GetWeather()`	Get weather singleton

Phenomena (Weather)

Method	Signature	Description
`GetOvercast`	`WeatherPhenomenon GetOvercast()`	Cloud cover
`GetRain`	`WeatherPhenomenon GetRain()`	Rain
`GetFog`	`WeatherPhenomenon GetFog()`	Fog
`GetSnowfall`	`WeatherPhenomenon GetSnowfall()`	Snow
`GetWindMagnitude`	`WeatherPhenomenon GetWindMagnitude()`	Wind speed
`GetWindDirection`	`WeatherPhenomenon GetWindDirection()`	Wind direction
`GetWind`	`vector GetWind()`	Wind direction vector
`GetWindSpeed`	`float GetWindSpeed()`	Wind speed m/s
`SetStorm`	`void SetStorm(float density, float threshold, float timeout)`	Lightning config

WeatherPhenomenon

Method	Signature	Description
`GetActual`	`float GetActual()`	Current interpolated value
`GetForecast`	`float GetForecast()`	Target value
`GetNextChange`	`float GetNextChange()`	Time when next forecast is computed (seconds)
`Set`	`void Set(float forecast, float time = 0, float minDuration = 0)`	Set target (server only)
`SetLimits`	`void SetLimits(float min, float max)`	Value range limits
`SetForecastTimeLimits`	`void SetForecastTimeLimits(float ftMin, float ftMax)`	Change speed limits
`SetForecastChangeLimits`	`void SetForecastChangeLimits(float fcMin, float fcMax)`	Magnitude change limits

File I/O Methods

Full reference: Chapter 6.8: File I/O & JSON

Path Prefixes

Prefix	Location	Writable
`$profile:`	Server/client profile directory	Yes
`$saves:`	Save directory	Yes
`$mission:`	Current mission folder	Read typically
`$CurrentDir:`	Not established by the inspected DayZ file API	Verify before use

File Operations

Method	Signature	Description
`FileExist`	`bool FileExist(string path)`	Check if file exists
`MakeDirectory`	`bool MakeDirectory(string path)`	Create directory
`OpenFile`	`FileHandle OpenFile(string path, FileMode mode)`	Open file (0 = fail)
`CloseFile`	`void CloseFile(FileHandle fh)`	Close file
`FPrint`	`void FPrint(FileHandle fh, void value)`	Write text (no newline)
`FPrintln`	`void FPrintln(FileHandle fh, void value)`	Write text + newline
`FGets`	`int FGets(FileHandle fh, string line)`	Read one line
`ReadFile`	`int ReadFile(FileHandle file, void param_array, int length)`	Read into int array or string (returns byte count)
`DeleteFile`	`bool DeleteFile(string path)`	Delete file
`CopyFile`	`bool CopyFile(string src, string dst)`	Copy file

JSON (JsonFileLoader)

Method	Signature	Description
`JsonLoadFile`	`void JsonFileLoader<T>.JsonLoadFile(string path, out T obj)`	Legacy/deprecated; returns void and can log parse errors
`JsonSaveFile`	`void JsonFileLoader<T>.JsonSaveFile(string path, T obj)`	Legacy/deprecated save

Prefer static bool JsonFileLoader<T>.LoadFile(string path, out T obj, out string error) and static bool JsonFileLoader<T>.SaveFile(string path, T obj, out string error) when callers need a success result.

FileMode Enum

Value	Description
`FileMode.READ`	Open for reading
`FileMode.WRITE`	Open for writing (creates/overwrites)
`FileMode.APPEND`	Open for appending

Timer & CallQueue Methods

Full reference: Chapter 6.7: Timers & CallQueue

Access

Expression	Returns	Description
`GetGame().GetCallQueue(CALL_CATEGORY_GAMEPLAY)`	`ScriptCallQueue`	Gameplay call queue
`GetGame().GetCallQueue(CALL_CATEGORY_SYSTEM)`	`ScriptCallQueue`	System call queue
`GetGame().GetCallQueue(CALL_CATEGORY_GUI)`	`ScriptCallQueue`	GUI call queue
`GetGame().GetUpdateQueue(CALL_CATEGORY_GAMEPLAY)`	`ScriptInvoker`	Per-frame update queue

ScriptCallQueue

Method	Signature	Description
`CallLater`	`void CallLater(func fn, int delay = 0, bool repeat = false, void param1 = NULL, ... void param9 = NULL)`	Schedule delayed/repeating call
`Call`	`void Call(func fn, void param1 = NULL, ... void param9 = NULL)`	Execute next frame
`CallByName`	`void CallByName(Class obj, string fnName, Param params = NULL)`	Call method by string name
`CallLaterByName`	`void CallLaterByName(Class obj, string fnName, int delay = 0, bool repeat = false, Param params = NULL)`	Delayed/repeating call by string name
`Remove`	`void Remove(func fn)`	Cancel scheduled call
`RemoveByName`	`void RemoveByName(Class obj, string fnName)`	Cancel by string name
`GetRemainingTime`	`int GetRemainingTime(func fn)`	Get remaining time on CallLater (ms)
`GetRemainingTimeByName`	`int GetRemainingTimeByName(Class obj, string fnName)`	Remaining time by string name (ms)

Timer Class

Method	Signature	Description
`Timer()`	`void Timer(int category = CALL_CATEGORY_SYSTEM)`	Constructor
`Run`	`void Run(float duration, Managed obj, string fnName, Param params = null, bool loop = false)`	Start timer
`Stop`	`void Stop()`	Stop timer
`Pause`	`void Pause()`	Pause timer
`Continue`	`void Continue()`	Resume timer
`IsRunning`	`bool IsRunning()`	Timer active? (false while paused)
`GetRemaining`	`float GetRemaining()`	Duration minus elapsed time; stopped timers may report full duration

ScriptInvoker

Method	Signature	Description
`Insert`	`bool Insert(func fn, int flags = EScriptInvokerInsertFlags.IMMEDIATE)`	Register callback
`Remove`	`bool Remove(func fn, int flags = EScriptInvokerRemoveFlags.ALL)`	Unregister callback
`Invoke`	`void Invoke(void param1 = NULL, ... void param9 = NULL)`	Fire all callbacks
`Count`	`int Count(func fn)`	How many times this fn is registered
`Clear`	`void Clear()`	Remove all callbacks

Full reference: Chapter 3.5: Programmatic Creation

Method	Signature	Description
`GetGame().GetWorkspace()`	`WorkspaceWidget GetWorkspace()`	Get UI workspace
`CreateWidgets`	`Widget CreateWidgets(string layout, Widget parent = null, bool immedUpdate = true)`	Load .layout file
`FindAnyWidget`	`Widget FindAnyWidget(string name)`	Find child by name (recursive)
`Show`	`void Show(bool show, bool immedUpdate = true)`	Show/hide widget
`SetText`	`void TextWidget.SetText(string text, bool immedUpdate = true)`	Set text content
`SetImage`	`bool ImageWidget.SetImage(int num)`	Set image index
`SetColor`	`void SetColor(int color)`	Set widget color (ARGB)
`SetAlpha`	`void SetAlpha(float alpha)`	Set transparency 0.0-1.0
`SetSize`	`void SetSize(float w, float h, bool immedUpdate = true)`	Set widget size
`SetPos`	`void SetPos(float x, float y, bool immedUpdate = true)`	Set widget position
`GetScreenSize`	`void GetScreenSize(out float x, out float y)`	Widget dimensions in screen pixels; global resolution helper uses int outputs
`Unlink`	`void Widget.Unlink()`	Remove and destroy widget (and children)

ARGB Color Helper

Function	Signature	Description
`ARGB`	`int ARGB(int a, int r, int g, int b)`	Create color int (0-255 each)
`ARGBF`	`int ARGBF(float a, float r, float g, float b)`	Create color int (0.0-1.0 each)

RPC / Networking Methods

Full reference: Chapter 6.9: Networking & RPC

Environment Checks

Method	Signature	Description
`GetGame().IsServer()`	`bool IsServer()`	True on server / listen-server host
`GetGame().IsClient()`	`bool IsClient()`	True on client
`GetGame().IsMultiplayer()`	`bool IsMultiplayer()`	True in multiplayer
`GetGame().IsDedicatedServer()`	`bool IsDedicatedServer()`	True only on dedicated server

ScriptRPC

Method	Signature	Description
`ScriptRPC()`	`void ScriptRPC()`	Constructor
`Write`	`bool Write(void value)`	Serialize a value (int, float, bool, string, vector, array)
`Send`	`void Send(Object target, int rpc_type, bool guaranteed, PlayerIdentity recipient = null)`	Send RPC
`Reset`	`void Reset()`	Clear written data

Receiving (Override on Object)

Method	Signature	Description
`OnRPC`	`void OnRPC(PlayerIdentity sender, int rpc_type, ParamsReadContext ctx)`	RPC receive handler

ParamsReadContext

Method	Signature	Description
`Read`	`bool Read(void value)`	Deserialize a value (same types as Write)

Legacy RPC (CGame)

Method	Signature	Description
`RPCSingleParam`	`void GetGame().RPCSingleParam(Object target, int rpc, Param param, bool guaranteed, PlayerIdentity recipient = null)`	Send single Param object
`RPC`	`void GetGame().RPC(Object target, int rpc, notnull array<ref Param> params, bool guaranteed, PlayerIdentity recipient = null)`	Send multiple Params

ScriptInputUserData (Input-Verified)

Method	Signature	Description
`CanStoreInputUserData`	`bool ScriptInputUserData.CanStoreInputUserData()`	Check if queue has space
`Write`	`bool Write(void value)`	Serialize value
`Send`	`void Send()`	Send to server (client only)

Math Constants & Methods

Full reference: Chapter 1.7: Math & Vectors

Constants

Constant	Value	Description
`Math.PI`	`3.14159...`	Pi
`Math.PI2`	`6.28318...`	2 * Pi
`Math.PI_HALF`	`1.57079...`	Pi / 2
`Math.DEG2RAD`	`0.01745...`	Degrees to radians multiplier
`Math.RAD2DEG`	`57.2957...`	Radians to degrees multiplier
`int.MAX`	`2147483647`	Maximum int
`int.MIN`	`-2147483648`	Minimum int
`float.MAX`	`3.4028e+38`	Maximum float
`float.MIN`	`1.175e-38`	Minimum positive float

Random

Method	Signature	Description
`Math.RandomInt`	`int RandomInt(int min, int max)`	Random int [min, max)
`Math.RandomIntInclusive`	`int RandomIntInclusive(int min, int max)`	Random int [min, max]
`Math.RandomFloat01`	`float RandomFloat01()`	Random float [0, 1]
`Math.RandomBool`	`bool RandomBool()`	Random true/false

Rounding

Method	Signature	Description
`Math.Round`	`float Round(float f)`	Round to nearest
`Math.Floor`	`float Floor(float f)`	Round down
`Math.Ceil`	`float Ceil(float f)`	Round up

Clamping & Interpolation

Method	Signature	Description
`Math.Clamp`	`float Clamp(float val, float min, float max)`	Clamp to range
`Math.Min`	`float Min(float a, float b)`	Minimum of two
`Math.Max`	`float Max(float a, float b)`	Maximum of two
`Math.Lerp`	`float Lerp(float a, float b, float t)`	Linear interpolation
`Math.InverseLerp`	`float InverseLerp(float a, float b, float val)`	Inverse lerp

Absolute & Power

Method	Signature	Description
`Math.AbsFloat`	`float AbsFloat(float f)`	Absolute value (float)
`Math.AbsInt`	`int AbsInt(int i)`	Absolute value (int)
`Math.Pow`	`float Pow(float base, float exp)`	Power
`Math.Sqrt`	`float Sqrt(float f)`	Square root
`Math.SqrFloat`	`float SqrFloat(float f)`	Square (f * f)

Trigonometry (Radians)

Method	Signature	Description
`Math.Sin`	`float Sin(float rad)`	Sine
`Math.Cos`	`float Cos(float rad)`	Cosine
`Math.Tan`	`float Tan(float rad)`	Tangent
`Math.Asin`	`float Asin(float val)`	Arc sine
`Math.Acos`	`float Acos(float val)`	Arc cosine
`Math.Atan2`	`float Atan2(float y, float x)`	Angle from components

Smooth Damping

Method	Signature	Description
`Math.SmoothCD`	`float SmoothCD(float val, float target, inout float velocity[], float smoothTime, float maxSpeed, float dt)`	Smooth damp toward target (like Unity's SmoothDamp)

// Smooth damping usage
// val: current value, target: target value, velocity: inout float[] (persisted between calls)
// smoothTime: smoothing time, maxSpeed: speed cap, dt: delta time
float m_Velocity[1] = {0};  // MUST be float array, not plain float
float result = Math.SmoothCD(current, target, m_Velocity, 0.3, 1000.0, dt);

Angle

Method	Signature	Description
`Math.NormalizeAngle`	`float NormalizeAngle(float deg)`	Wrap to 0-360

Vector Methods

Method	Signature	Description
`vector.Distance`	`float Distance(vector a, vector b)`	Distance between points
`vector.DistanceSq`	`float DistanceSq(vector a, vector b)`	Squared distance (faster)
`vector.Direction`	`vector Direction(vector from, vector to)`	Direction vector
`vector.Dot`	`float Dot(vector a, vector b)`	Dot product
`vector.Lerp`	`vector Lerp(vector a, vector b, float t)`	Interpolate positions
`v.Length()`	`float Length()`	Vector magnitude
`v.LengthSq()`	`float LengthSq()`	Squared magnitude (faster)
`v.Normalized()`	`vector Normalized()`	Unit vector
`v.VectorToAngles()`	`vector VectorToAngles()`	Direction to yaw/pitch
`v.AnglesToVector()`	`vector AnglesToVector()`	Yaw/pitch to direction
`v.Multiply3`	`vector Multiply3(vector mat[3])`	Matrix multiply
`v.InvMultiply3`	`vector InvMultiply3(vector mat[3])`	Inverse matrix multiply
`Vector(x, y, z)`	`vector Vector(float x, float y, float z)`	Create vector

Global Functions

Function	Signature	Description
`GetGame()`	`DayZGame GetGame()`	Game instance; declared `3_game/gameplay.c:636` as `{ return g_Game; }`. `DayZGame extends CGame` (`3_game/dayzgame.c:908`); `GetDayZGame()` (`:3973`) is an equivalent accessor
`GetGame().GetPlayer()`	`DayZPlayer GetPlayer()`	Local player (CLIENT only)
`GetGame().GetPlayers(out arr)`	`void GetPlayers(out array<Man> arr)`	All players (server)
`GetGame().GetWorld()`	`World GetWorld()`	World instance
`GetGame().GetTickTime()`	`float GetTickTime()`	Elapsed time since game start (seconds), on the current instance
`GetGame().GetWorkspace()`	`WorkspaceWidget GetWorkspace()`	UI workspace
`GetGame().SurfaceY(x, z)`	`float SurfaceY(float x, float z)`	Terrain height at position
`GetGame().SurfaceGetType(x, z, type)`	`float SurfaceGetType(float x, float z, out string type)`	Surface material type (in `out` param)
`GetGame().GetObjectsAtPosition(pos, radius, objects, proxyCargo)`	`void GetObjectsAtPosition(vector pos, float radius, out array<Object> objects, out array<CargoBase> proxyCargo)`	Find objects near position
`GetScreenSize(w, h)`	`void GetScreenSize(out int w, out int h)`	Get screen resolution
`GetGame().IsServer()`	`bool IsServer()`	Server check
`GetGame().IsClient()`	`bool IsClient()`	Client check
`GetGame().IsMultiplayer()`	`bool IsMultiplayer()`	Multiplayer check
`Print(string)`	`void Print(void value)`	Write to script log
`ErrorEx(string)`	`void ErrorEx(string msg, ErrorExSeverity sev = ErrorExSeverity.ERROR)`	Log error with severity
`DumpStackString()`	`void DumpStackString(out string stack)`	Get call stack as string (fills out param)
`string.Format(fmt, ...)`	`string Format(string fmt, ...)`	Format string (`%1`..`%9`)

Mission Hooks

Full reference: Chapter 6.11: Mission Hooks

Server-side (modded MissionServer)

Method	Description
`override void OnInit()`	Initialize managers, register RPCs
`override void OnMissionStart()`	Mission start callback
`override void OnUpdate(float timeslice)`	Per-frame (use accumulator!)
`override void OnMissionFinish()`	Cleanup singletons, unsubscribe events
`override void OnEvent(EventType eventTypeId, Param params)`	Chat, voice events
`override void InvokeOnConnect(PlayerBase player, PlayerIdentity identity)`	Player joined
`override void InvokeOnDisconnect(PlayerBase player)`	Player left
`override void OnClientReadyEvent(PlayerIdentity identity, PlayerBase player)`	Client ready for data
`override void OnClientPrepareEvent(PlayerIdentity identity, out bool useDB, out vector pos, out float yaw, out int preloadTimeout)`	Identity available before character creation (`missionserver.c:436`)

Client-side (modded MissionGameplay)

Method	Description
`override void OnInit()`	Initialize client managers, create HUD
`override void OnUpdate(float timeslice)`	Per-frame client update
`override void OnMissionFinish()`	Cleanup
`override void OnKeyPress(int key)`	Key pressed
`override void OnKeyRelease(int key)`	Key released

Action System

Full reference: Chapter 6.12: Action System

Register Actions on an Item

override void SetActions()
{
    super.SetActions();
    AddAction(MyAction);           // Add custom action
    RemoveAction(ActionEat);       // Remove vanilla action
}

Action Callback Methods

OnExecuteServer / OnExecuteClient are declared on AnimatedActionBase, not directly on every ActionBase subclass. Choose the base class that provides the callback.

Method	Description
`override void CreateConditionComponents()`	Set CCINone/CCTNone distance conditions
`override bool ActionCondition(...)`	Custom validation logic
`override void OnExecuteServer(ActionData action_data)`	Server-side execution
`override void OnExecuteClient(ActionData action_data)`	Client-side effects
`override string GetText()`	Display name (supports `#STR_` keys)

Audit Sources and Limits

Independently checked 2026-09-11 against D:/DayZ Projects/scripts/, whose release identity is unconfirmed. Source families below are relative to that root.

Reference sections	Primary source
Entity, damage, type, inventory	`1_core/proto/enentity.c`; `3_game/entities/object.c`, `entityai.c`; `3_game/systems/inventory/inventory.c`
Player and vehicles	`3_game/entities/man.c`, `gameplay.c`, `vehicles/car.c`, `vehicles/transport.c`; `4_world/entities/manbase/playerbase.c`
Weather and creation flags	`3_game/weather.c`; `3_game/ce/centraleconomy.c`; `3_game/global/game.c`
Files, JSON, timers and queues	`1_core/proto/ensystem.c`; `3_game/tools/jsonfileloader.c`, `tools.c`; `2_gamelib/tools.c`
Widgets, RPC and math	`1_core/proto/enwidgets.c`, `serializer.c`, `enmath.c`, `enconvert.c`, `enmath3d.c`; `3_game/gameplay.c`
Mission and action hooks	`3_game/gameplay.c`; `5_mission/mission/missionserver.c`; `4_world/classes/useractionscomponent/actionbase.c`, `animatedactionbase.c`; `4_world/entities/itembase.c`

Declarations establish signatures, not runtime guarantees or availability in every build/context. Native behavior not described in the source remains unverified. 3_game/dayzgame.c:3971 declares DayZGame g_Game, and 3_game/gameplay.c:636 declares the script accessor DayZGame GetGame() { return g_Game; }, so the GetGame().X form used throughout this page is the vanilla-declared path. (A separate Game GetGame() at 2_gamelib/gamelib.c:4 sits inside #ifdef GAME_TEMPLATE and is not the DayZ path.) MyAction is an illustrative class you must implement; the action and smoothing snippets belong inside suitable surrounding code.

Engine API Quick Reference ​

Table of Contents ​

Entity Methods ​

Position & Orientation (Object) ​

Transform (IEntity) ​

Hierarchy (IEntity) ​

Display Info (Object) ​

Bone Positions (Object) ​

Config Access (Object) ​

Health & Damage ​

Type Checking ​

Inventory ​

Entity Creation & Deletion ​

Common ECE Flags ​

Player Methods ​

Vehicle Methods ​

Crew (Transport) ​

Engine (Car) ​

Fluids (Car) ​

Controls (Car) ​

Weather Methods ​

Access ​

Phenomena (Weather) ​

WeatherPhenomenon ​

File I/O Methods ​

Path Prefixes ​

File Operations ​

JSON (JsonFileLoader) ​

FileMode Enum ​

Timer & CallQueue Methods ​

Access ​

ScriptCallQueue ​

Timer Class ​

ScriptInvoker ​

Widget Creation Methods ​

ARGB Color Helper ​

RPC / Networking Methods ​

Environment Checks ​

ScriptRPC ​

Receiving (Override on Object) ​

ParamsReadContext ​

Legacy RPC (CGame) ​

ScriptInputUserData (Input-Verified) ​

Math Constants & Methods ​

Constants ​

Random ​

Rounding ​

Clamping & Interpolation ​

Absolute & Power ​

Trigonometry (Radians) ​

Smooth Damping ​

Angle ​

Vector Methods ​

Global Functions ​

Mission Hooks ​

Server-side (modded MissionServer) ​

Client-side (modded MissionGameplay) ​

Action System ​

Register Actions on an Item ​

Action Callback Methods ​

Audit Sources and Limits ​

Engine API Quick Reference

Table of Contents

Entity Methods

Position & Orientation (Object)

Transform (IEntity)

Hierarchy (IEntity)

Display Info (Object)

Bone Positions (Object)

Config Access (Object)

Health & Damage

Type Checking

Inventory

Entity Creation & Deletion

Common ECE Flags

Player Methods

Vehicle Methods

Crew (Transport)

Engine (Car)

Fluids (Car)

Controls (Car)

Weather Methods

Access

Phenomena (Weather)

WeatherPhenomenon

File I/O Methods

Path Prefixes

File Operations

JSON (JsonFileLoader)

FileMode Enum

Timer & CallQueue Methods

Access

ScriptCallQueue

Timer Class

ScriptInvoker

Widget Creation Methods

ARGB Color Helper

RPC / Networking Methods

Environment Checks

ScriptRPC

Receiving (Override on Object)

ParamsReadContext

Legacy RPC (CGame)

ScriptInputUserData (Input-Verified)

Math Constants & Methods

Constants

Random

Rounding

Clamping & Interpolation

Absolute & Power

Trigonometry (Radians)

Smooth Damping

Angle

Vector Methods

Global Functions

Mission Hooks

Server-side (modded MissionServer)

Client-side (modded MissionGameplay)

Action System

Register Actions on an Item

Action Callback Methods

Audit Sources and Limits