Blueprint 类型详解
Actor: An actor is an object that can be placed or spawned in the world. (能够被放到世界)
Pawn: A pawn is an actor that can be possessed and receive input from a controller.（能被控制的Actor）
Character: A character is a type of Pawn that includes the ability to walk around.（能够走动的Pawn）
PlayerController: A Player controller is an actor responsible for controlling a Pawn used by the player.（用来控制Pawn）
AIController
GameModeBase: Game mode base defines the game being played, its rules, scoring, and other facets of the game type.（定义游戏，得分，以及其他方面）
ActorComponent: An actor component is a reusable component that can be added to any actor.（能够添加到Actor的可重用构件）
SceneComponent: A scene component is a component that has a scene transform and can be attached to other scene components. （可以附加到其他场景组件）
Game Instance:
Representing Players, Friends, and Foes in the world
Pawn: not assumed to be humanoid.
Character: humanoid-style Pawn.
Display Information to Players
HUD: A HUD is a heads-up display, or the 2D on-screen display that is comon in many games. Think health, ammo, gun reticle, etc. Each PlayerController typically has one of these.
Camera: The PlayerCameraManager is the eyeball for a player and manages how it hebaviors. Each PlayerController typically has one of these as well.
Setting and Tracking the Rules of the Game
GameMode
GameState
PlayerState
https://docs.unrealengine.com/Images/Gameplay/Framework/QuickReference/GameFramework.jpg
