Cheatsheet

UPROPERTY

UPROPERTY	UPROPERTY(VisibleAnywhere, Category='Player')
BlueprintAssignable	Multicast Delegates only. Exposes property for assigning in Blueprints
BlueprintCallable	Multicast Delegates only. Property exposed for calling in Blueprints
BlueprintReadOnly	Readable from blueprints, but not writeable
BlueprintReadWrite	Read or writeable from blueprints
Category	Category of the property.
EditAnywhere	Can be edited by property windows, on archetypes & instances
EditDefaultsOnly	Edited by property windows, but only on archetypes
EditFixedSize	Prevent changing the length of an array (useful for dynamic arrays)
EditInstanceOnly	Edited by property windows, but only on instances, not on archetypes
Transient	Should not be saved, zero-filled at load time
VisibleAnywhere	Visible in property windows, but can't beedited at all
VisibleDefaultsOnly	Visible in property windows for archetypes, & can't be edited
VisibleInstanceOnly	Visible in property windows for instances, not archetypes, & can't be edited

UFUNCTION

UFUNCTION	UFUNCTION(BlueprintCallable, Category = Power)
BlueprintAuthorityOnly	Will not execute from Blueprint code if running on something without network authority
BlueprintCallable	Can be executed in a Blueprint or Level Blueprint graph
BlueprintCosmetic	Is cosmetic and will not run on dedicated servers
BlueprintImplementableEvent	Can be overridden in a Blueprint or Level Blueprint graph
BlueprintNativeEvent	Designed to be overridden by a Blueprint but also has a native implementation
BlueprintPure	Does not affect the owning object in any way and can be executed in a Blueprint or Level Blueprint graph
Client	Only executed on the client that owns the Object the function belongs to
Exec	Can be executed from the in-game console
NetMulticast	Executed locally on the server and replicatedto all clients, regardless of the Actor's NetOwner
Reliable	Replicated over the network, and is guaranteed to arrive regardless of bandwidth or network errors
Server	Only executed on the server
Unreliable	Replicated over the network but can fail due to bandwidth limitations or network errors

Types

Types	Prefix	Example
AActor	A	ACharacter
Boolean	b	bool bIsTeaDelicious;
Enums	E	enum EPlayerType;
Interfaces	I	INetworkConnection
Struct	F	FMyStruct;
SWidget	S	SMyWidget;
Template	T	TArray< int > MyIntArray;
UObject	U	UCameraComponent* ThirdPersonCamera;

Naming & Coding Standards

Naming & Coding Standards
bool	bool bIsTeaDelicious;
float	float TeaWeight;
int32	int32 TeaCount;
FName	FName TeaName;
FString	FString TeaFriendlyName;
UClass	UClass* TeaClass;
USoundCue	USoundCue* TeaSound;
UTexture	UTexture* TeaTexture;;

Operator

Operator		Usage
&&	AND
II	OR
!	NOT
<=	LESS THAN OR EQUAL
>=	GREATER THAN OR EQUAL
!=	NOT EQUAL
==	EQUAL
++	INCREMENT
--	DECREMENT
?	IF
:	COLON

Role

Role	Description
None	The Actor has no role in a network game and does not replicate
Authority	The Actor is authoritative and replicates its information to remote proxies of it on other machines
Simulated Proxy	The Actor is a remote proxy that is controlled entirely by an authoritative Actor on another machine. Most Actors in a network game, like pickups, projectiles, or interactive objects, will appear as Simulated Proxies on remote clients
Autonomous Proxy	The Actor is a remote proxy that is capable of performing some functions locally, but receives corrections from an authoritative Actor. Autonomous Proxy is usually reserved for Actors under the direct control of a player, like Pawns

Servers

Network Mode	Description
Standalone	The game is running as a server that does not accept connections from remote clients. Any players participating in the game are strictly local players. This mode is used for single-player and local multiplayer games. It will run both server-side logic and client-side logic as appropriate for the local players.
Client	The game is running as a client that is connected to a server in a network multiplayer session. It will not run any server-side logic.
Server (Listen)	The game is running as a server hosting a network multiplayer session. It accepts connections from remote clients and has local players directly on the server. This mode is often used for casual cooperative and competitive multiplayer.
Server (Dedicated)	The game is running as a server hosting a network multiplayer session. It accepts connections from remote clients, but has no local players, so it discards graphics, sound, input, and other other player-oriented features in order to run more efficiently. This mode is often used for games requiring more persistent, secure, or large-scale multiplayer

Replication

Replication Feature	Description
Creation and Destruction	When an authoritative version of a replicated Actor is spawned on a server, it automatically generates remote proxies of itself on all connected clients. It will then replicate information to those remote proxies. If you destroy an authoritative Actor, it will automatically destroy its remote proxies on all connected clients
Movement Replication	If an authoritative Actor has Replicate Movement enabled, or bReplicateMovement is set to true in C++, it will automatically replicate its Location, Rotation, and Velocity
Variable Replication	Any variables that are designated as being replicated will automatically replicate from the authoritative actor to its remote proxies whenever their values change
Component Replication	Actor Components replicate as part of the Actor that owns them. Any variables within the Component that are designated as being replicated will replicate, and any Remote Procedure Calls called within the component will behave consistently with Remote Procedure Calls called in the Actor class
Remote Procedure Calls	Remote Procedure Calls are special functions that are transmitted to specific machines in a network game. No matter what machine an Remote Procedure Call is initially called on, its implementation will run only on the machine it is intended for. These may be designated as Server (only runs on the server), Client (only runs on the Actor's owning client), or NetMulticast (runs on every machine connected to the session, including the server