的筆記

UE4小筆記

一句簡單的話就夠了，多一個字也多了。

名字版Widget的設計習慣

用全窗口尺寸設計，設計的時候設置大小，嵌入的時候設置成同樣的大小

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禁止客戶端發(fā)送Camera更新消息

如果不是Full 3D的客戶端，不需要每幀都發(fā)送Camera的位姿數(shù)據(jù)，就算Full 3D，也是過于頻繁了，畢竟還有Actor的位姿數(shù)據(jù)每幀都會發(fā)送

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

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取執(zhí)行程序的目錄

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

--->ProjectName/Binaries/Win64/luaclib

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動態(tài)組件的進化

一般在構造函數(shù)里用CreateDefaultSubobject創(chuàng)建組件Creating and Attaching Components
在其他地方創(chuàng)建組件，必須用ConstructObject
后來這個方法被depreciate了，現(xiàn)在用NewObject

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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

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error:Package contains EditorOnly data

如果在Game中使用了引擎資源，加載場景就會報這種錯誤。解決:
查找和修改代碼或BP中有使用“Engine/EditorMeshes”路徑下的資源。

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調整近裁剪面距離

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

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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.

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自動插入Engine StarterContent

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

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NewObject

NewObject(UObject*Outer, UClass* Class)

在對象里GetOuter可以取回NewObject時傳入的指針

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How many ways to get World

<占位描述>

UWorldProxy WorldProxy = GWorld;

UWorld* world = GEngine->GetWorld();

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USTRUCT() vs USTRUCT(BlueprintType)

USTRUCT()
struct FQuestInProgress

???

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Enable GameplayAbilities

Enable in plugin or modify uproject

"Plugins": [
{
"Name": "GameplayAbilities",
"Enabled": true
}
]
GameAbility\Config\DefaultEngine.ini
[GameplayAbilities]
GameplayAbilitiesEditorEnabled=true

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Landscape Splines快捷鍵

ref: Landscape Splines

鼠標左鍵

選中一個point或一個segment

Shift+鼠標左鍵

多選

Ctrl+鼠標左鍵

產生多個效果。如果當前選中的是一個segment，然后你點擊到其上某點，則創(chuàng)建一個新的控制點。如果選中point后執(zhí)行，則試了就知道。

R

自動計算控制點的Rotation

T

自動計算Tangent

F

Flip Segment

End

Snaps control points to Landscape

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VCToolChain

UnrealBuildTool.VCToolChain.AppendCLArguments_Global()

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UPARAM(ref)

如果參數(shù)是引用，則默認情況下是一個out pin。UPARAM(ref)正好逆反這個行為。
UPARAM wiki

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UPARAM(DisplayName)

修改pin label 的顯示名字
UPARAM wiki

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版本判斷

#endif //~ _MSC_VER

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相機繞軸旋轉

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Performance

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

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遍歷目錄下的文件

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

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Module Implemention

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Detail Customization

<占位項1>

<占位項2>

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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,
};
}

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禁用precompiled heade

在ModuleRules的構造里加入:PCHUsage = PCHUsageMode.UseExplicitOrSharedPCHs;

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查看引擎剔除的對象

r.visualizeocculsion 1

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IWYU(Include-What-You-Use)

IWYU 參考指南

IWYU 在游戲和游戲插件中默認禁用，但在引擎和引擎插件中默認啟用。

<占位項2>

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判斷一個方法在BP里有沒有實現(xiàn)

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);
}
}

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Android signing

Signing Projects for Release

<占位項1>

<占位項2>

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屏幕打印

C++

UKismetSystemLibrary::PrintString

BP:

Print String

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C++中判斷某BP方法是否存在

參考:GameplayAbilities\Private\Abilities\GameplayAbility.cpp

 

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BP轉C++

Converting From Blueprints to C++

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指定Visual Studio版本

"%UE4_DIR%\Engine\Binaries\DotNET\UnrealBuildTool.exe" -projectfiles -project="%~dp0\TestTopDown.uproject" -2015

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占位標題

<占位項1>

<占位項2>

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占位標題

<占位項1>

<占位項2>

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占位標題

<占位項1>

<占位項2>

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posted on 2017-01-14 18:14 的筆記 閱讀(3342) 評論(0)  編輯 收藏 引用