的笔记

随时随地编辑

UE4小笔记

一句简单的话就够了,多一个字也多了。


名字版Widget的设计习惯

用全窗口尺寸设计,设计的时候设置大小,嵌入的时候设置成同样的大小

禁止客户端发送Camera更新消息

如果不是Full 3D的客户端,不需要每帧都发送Camera的位姿数据,就算Full 3D,也是过于频繁了,毕竟还有Actor的位姿数据每帧都会发送

void AUserPlayerController::PostInitializeComponents(){
  Super::PostInitializeComponents();
  ensure(PlayerCameraManager);
  if(PlayerCameraManager){PlayerCameraManager->bUseClientSideCameraUpdates = false;}
}

取执行程序的目录

FPaths::Combine(*FPaths::GameDir(), TEXT("Binaries"), FPlatformProcess::GetBinariesSubdirectory(), TEXT("luaclib"));

--->ProjectName/Binaries/Win64/luaclib


动态组件的进化

一般在构造函数里用CreateDefaultSubobject创建组件Creating and Attaching Components
在其他地方创建组件,必须用ConstructObject
后来这个方法被depreciate了,现在用NewObject

UObject配置文件

  • GetGlobalUserConfigFilename:C:/Users//AppData/Local/Unreal Engine/Engine/Config/UserMySettings.ini
  • USensorSettings GetDefaultConfigFilename:../../../../ /Config/DefaultMySettings.ini
  • USensorSettings GetConfigFilename: /Saved/Config/Windows/MySettings.ini


  • error:Package contains EditorOnly data

    如果在Game中使用了引擎资源,加载场景就会报这种错误。解决:
    查找和修改代码或BP中有使用“Engine/EditorMeshes”路径下的资源。

    调整近裁剪面距离

    \Config\DefaultEngine.ini
    [/Script/Engine.Engine]
    NearClipPlane=1
    
    

    LightmassImportanceVolume

    LightingResults:Warning: Performance Warning No importance volume found and the scene is so large that the automatically synthesized volume will not yield good results. Please add a tightly bounding lightmass importance volume to optimize your scene's quality and lighting build times.

    自动插入Engine StarterContent

    [StartupActions]
    bAddPacks=True
    InsertPack=(PackSource="StarterContent.upack",PackName="StarterContent")
    

    NewObject

    NewObject(UObject*Outer, UClass* Class)
  • 在对象里GetOuter可以取回NewObject时传入的指针

  • How many ways to get World

    <占位描述>
  • UWorldProxy WorldProxy = GWorld;
  • UWorld* world = GEngine->GetWorld();

  • USTRUCT() vs USTRUCT(BlueprintType)

    USTRUCT()
    struct FQuestInProgress
    
    ???

    Enable GameplayAbilities

    Enable in plugin or modify uproject
    "Plugins": [
    {
    "Name": "GameplayAbilities",
    "Enabled": true
    }
    ]
    GameAbility\Config\DefaultEngine.ini
    [GameplayAbilities]
    GameplayAbilitiesEditorEnabled=true
    

    Landscape Splines快捷键

    ref: Landscape Splines
  • 鼠标左键
  • 选中一个point或一个segment
  • Shift+鼠标左键
  • 多选
  • Ctrl+鼠标左键
  • 产生多个效果。如果当前选中的是一个segment,然后你点击到其上某点,则创建一个新的控制点。如果选中point后执行,则试了就知道。
  • R
  • 自动计算控制点的Rotation
  • T
  • 自动计算Tangent
  • F
  • Flip Segment
  • End
  • Snaps control points to Landscape

    VCToolChain

    UnrealBuildTool.VCToolChain.AppendCLArguments_Global()

    UPARAM(ref)

    如果参数是引用,则默认情况下是一个out pin。UPARAM(ref)正好逆反这个行为。
    UPARAM wiki

    UPARAM(DisplayName)

    修改pin label 的显示名字
    UPARAM wiki

    版本判断

    // check unreal engine
    #ifdef _MSC_VER
        #include "../../../Launch/Resources/Version.h"

        #if ENGINE_IS_PROMOTED_BUILD
            #define _VALUE_TO_STRING(x) #x
            #define _VALUE(x) _VALUE_TO_STRING(x)
            #define _VAR_NAME_VALUE(var) #var "="  VALUE(var)

            #pragma message("------ Using offical Unreal engine " _VALUE(BUILT_FROM_CHANGELIST) )
        #else
            #pragma message("------ Using custom build Unreal engine")
        #endif
    #endif //~ _MSC_VER

    相机绕轴旋转


    Performance

    Performance and Profiling
    How to Setup Automatic LOD Generation
    Performance Guidelines for Artists and Designers

    遍历目录下的文件

    TArray<FString> Files;
    FPackageName::FindPackagesInDirectory(Files, FString::Printf(TEXT("%s/Content/Maps"), *FPaths::GameDir()));

    Module Implemention


    Detail Customization

  • <占位项1>
  • <占位项2>

  • Enum

    Engine\Source\Runtime\Engine\Classes\Engine\EngineTypes.h
    UENUM(BlueprintType)
    namespace EEndPlayReason
    {
    enum Type
    {
    /** When the Actor or Component is explicitly destroyed. */
    Destroyed,
    /** When the world is being unloaded for a level transition. */
    LevelTransition,
    /** When the world is being unloaded because PIE is ending. */
    EndPlayInEditor,
    /** When the level it is a member of is streamed out. */
    RemovedFromWorld,
    /** When the application is being exited. */
    Quit,
    };
    }
    

    禁用precompiled heade

    在ModuleRules的构造里加入:PCHUsage = PCHUsageMode.UseExplicitOrSharedPCHs;

    查看引擎剔除的对象

    r.visualizeocculsion 1

    IWYU(Include-What-You-Use)

    IWYU 参考指南
  • IWYU 在游戏和游戏插件中默认禁用,但在引擎和引擎插件中默认启用。
  • <占位项2>

  • 判断一个方法在BP里有没有实现

    UGameplayAbility()
    {
    auto ImplementedInBlueprint = [](const UFunction* Func) -> bool
    {
    return Func && ensure(Func->GetOuter())
    && (Func->GetOuter()->IsA(UBlueprintGeneratedClass::StaticClass())
    || Func->GetOuter()->IsA(UDynamicClass::StaticClass()));
    };
    {
    static FName FuncName = FName(TEXT("K2_ShouldAbilityRespondToEvent"));
    UFunction* ShouldRespondFunction = GetClass()->FindFunctionByName(FuncName);
    bHasBlueprintShouldAbilityRespondToEvent = ImplementedInBlueprint(ShouldRespondFunction);
    }
    }
    


    Android signing

    Signing Projects for Release
  • <占位项1>
  • <占位项2>


  • 屏幕打印

    C++
  • UKismetSystemLibrary::PrintString
  • BP:
  • Print String


  • C++中判断某BP方法是否存在

    参考:GameplayAbilities\Private\Abilities\GameplayAbility.cpp

    auto ImplementedInBlueprint = [](const UFunction* Func) -> bool
    {
        
    return Func && ensure(Func->GetOuter())
            
    && (Func->GetOuter()->IsA(UBlueprintGeneratedClass::StaticClass()) || Func->GetOuter()->IsA(UDynamicClass::StaticClass()));
    };

    {
        
    static FName FuncName = FName(TEXT("K2_ShouldAbilityRespondToEvent"));
        UFunction
    * ShouldRespondFunction = GetClass()->FindFunctionByName(FuncName);
        bHasBlueprintShouldAbilityRespondToEvent 
    = ImplementedInBlueprint(ShouldRespondFunction);
    }

     



    占位标题

  • <占位项1>
  • <占位项2>


  • 占位标题

  • <占位项1>
  • <占位项2>


  • 占位标题

  • <占位项1>
  • <占位项2>


  • 占位标题

  • <占位项1>
  • <占位项2>


  • 占位标题

  • <占位项1>
  • <占位项2>


  • posted on 2017-01-14 18:14 的笔记 阅读(516) 评论(0)  编辑 收藏 引用


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