UE4类型与资源概述

类型：UObject及其派生类型

资源：序列化到磁盘的UObject及其派生类型的对象

Native Class在游戏启动时，会自动加载，并一直常驻内存

Blueprint Class既是类型，也是资源。可动态加载与卸载

资源有很多种：Level（关卡）、UI（UMG）、Particle System（粒子）、Texture（贴图）、Mesh（网格）、Material（材质）

                             Animation（动作）、Foliage（植被）、Physics（物理）、AI（人工智能）、Sound（声音）、Sprite（图集）等

大部分资源是以uasset作为后缀的，地图关卡以umap为后缀

类型分类

C++		Blueprints
Object	GameMode	Object_C	GameMode_C
Actor	PlayerController	Actor_C	PlayerController_C
ActorComponent	AIController	ActorComponent_C	AIController_C
SceneComponent	Character	SceneComponent_C	Character_C
	GameState		GameState_C
	PlayerState		PlayerState_C
	HUD		HUD_C
	UserWidget		UserWidget_C

资源分类（一）

Blueprints	Textures	Texture（美术）	Materials	Mesh（美术）	Level	User Interface	Editor Utilities	Media
Blueprint Class	Canvas Render Target	Texture	Material	Static Mesh	Level	Font	Editor Utility Blueprint	File Media Source
Blueprint Function Library	Cube Render Target		Material Function	Skeletal Mesh		Slate Brush	Editor Utility Widget	Img Media Source
Blueprint Interface	Media Texture		Material Instance	Skeleton		Slate Widget Style		Media Player
Blueprint Macro Library	Render Target		Material Parameter Collection			Widget Blueprint		Media Playerlist
Enumeration	Runtime Virtual Texture							Media Texture
Structure	Subsurface Profile							Platform Media Source
	Volume Texture							Stream Media Source

资源分类（二）

Animation #1	Animation #2	Animation Sequence（美术）	Physics	Foliage	Paper2D	Artificial Intelligence	Blendables
Aim Offset	Blend Space 1D	Animation Sequence	Chaos Physical Material	Actor Foliage	Paper Flipbook	Behavior Tree	LightpropagationVolume Blendable
Aim Offset 1D	Bone Compression Settings		Chaos Solver	Landscape Grass Type	Sprite	Blackboard
Animation Blueprint	Camera Animation Sequence		Geometry Collection	Static Mesh Foliage	Tile Map
Animation Composite	Curve Compression Settings		Geometry Collection Cache		Tile Set
Animation Layer Interface	Level Sequence		Physical Material
Animation Montage	Paper Flipbook		Physical Material Mask
Animation Sharing Setup	Pose Asset		Physical Asset
Blend Space	Template Sequence

 资源分类（三）

FX	Particle System	Miscellaneous#1（杂项1）	Miscellaneous#2（杂项2）	Sounds #1	Sounds #2	Sound（美术）	Redirector（重定向器）
Niagara Dynamic Input Script	Particle System	Camera Anim	Level Variant Sets	Sound Attenuation	Sound Effect Preset Chain	Sound Wave	Redirector
Niagara Effect Type		Composite Curve Table	Matinee Data	Sound Concurrency	Submix Effect Preset
Niagara Emitter		Composite Data Table	Object Library	Sound Cue	Endpoint Submix
Niagara Function Script		Curve	Preview Mesh Collection	Sound Class	Sound Submix
Niagara Module Script		Curve Atlas	String Table	Sound Class Mix	Soundfield Endpoint Submix
Niagara Parameter Collection		Data Asset	Touch Interface Setup	Dialogue Voice	Soundfield Submix
Niagara Parameter Collection Instance		Data Table	Tutorial Blueprint	Dialogue Wave	Sound Bus
Niagara System		Force Feedback Effect		Reverb Effect	Modular Synth Preset Bank
				Sound Effect Preset	Modular Wave Table Synth Preset Bank

不同资源之间的依赖关系

类型及资源路径

每个类型及资源都有其唯一的路径

StaticMesh'/Game/ThirdPerson/Meshes/Bump_StaticMesh.Bump_StaticMesh'

Blueprint'/Game/ThirdPersonCPP/Blueprints/ThirdPersonCharacter.ThirdPersonCharacter'

World'/Game/ThirdPersonCPP/Maps/ThirdPersonExampleMap.ThirdPersonExampleMap'

Class'/Script/MyTest1.MyTest1Character'

更复杂的情况：

Class'/Game/ThirdPersonCPP/Maps/ThirdPersonExampleMap.ThirdPersonExampleMap:PersistentLevel.BP_MyObject_C_2147449358'   

注1：ULevel* PersistentLevel为UWorld'/Game/ThirdPersonCPP/Maps/ThirdPersonExampleMap.ThirdPersonExampleMap'的成员变量，即主关卡

注2：BP_MyObject_C_2147449358可能是直接摆放在主关卡中的或者运行时动态生成的

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资源类型  分区(Game | Engine | 插件名 | Script)  目录   包名  对象名

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① 用资源路径加载资源时，资源类型不用写

② 一个包中可能有多个对象  例如：关卡包ThirdPersonExampleMap中除了World对象ThirdPersonExampleMap外，还有很多其他Actor对象

③ 对于蓝图对象，如果用的不是默认对象，而是其类型，就要在后面加_C，如果其CDO对象，就要在前面加Default__

     类型如：/Game/ThirdPersonCPP/Blueprints/ThirdPersonCharacter.ThirdPersonCharacter_C

     CDO如：/Script/Engine.Default__Actor