yuxikuo_1的专栏

问题：原因：是因为UE4对内部代码保护，没有对该类或者结构体导出，即没有在类前加XXX_API，此处缺少ENGINE_API。修改：

1.枚举类型UPROPERTY(BlueprintReadOnly, EditAnywhere, Category = "WidgetConfig")EGUIDE_TYPE GuideType = EGUIDE_TYPE::OnlyOnce;UPROPERTY(EditAnywhere, BlueprintReadOnly, Category = "WidgetConfig", meta = (EditCondition = "GuideType == EGUIDE_TYPE::MultiTime

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FDateTime::Now().GetTimeOfDay().GetTotalMilliseconds()

UE4 Audio系统分析项目项目项目SoundWave常用属性：1.1. Format1.2. PlaybackSoundCueSoundClassSoundMixSoundAttenuationSoundConcurrencySoundOcculusionReverbEffectsAudioVolume 计划任务 完成任务创建一个表格一个简单的表格是这么创建的：项目Value电脑$1

template <typename T>class Array3D{public: Array3D(unsigned int _length, unsigned int _width, unsigned int _height, const T& defaultValue) : length(_length) , width(_width) , height(_height) { for (unsigned int x = 0; x < length;.

//A.cpptemplate<typename Functor>void ForEachPart(Functor functor){ for (unsigned int z = 0, zSize = Parts.getHeight(); z < zSize; ++z) { for (unsigned int y = 0, ySize = Parts.getWidth(); y < ySize; ++y) { for (unsigned int x = 0,.

AActor* APlayerController::GetActorUnderPoint(const FVector2D& point) const{ FVector location, direction; DeprojectScreenPositionToWorld(point.X, point.Y, location, direction); FCollisionQueryParams TraceParams(FName(TEXT("")), true, this); Trac.

问题描述：项目一开始使用UE4.23，后来升级到UE4.24，出现修改蓝图组件属性，甚至UE4原生组件，比如灯光的Light的Channel都会导致UE4崩溃。解决办法：1.使用Reload，蓝图修改第一次不会崩溃，第二次依然会崩溃。2.设置Projecting里的EditorScene为空，重新打开UE4 Editor，目的是保证我们要修改的蓝图，没有场景对象实例依赖或引用目标蓝图，修改蓝图属性正常。3.比对UE4.25源码，发现是UE4的bug，并且已经在4.25修复，下面是diff文件

问题如下图错误的配置，如下图正确的配置，如下图其实就是工作目录那一项，需要正确配置，如果为空或者配置不正确，就会出现图1的问题。

其实材质特别简单，如下图

bool UFormulaFunctionLibrary::IsInsideSector(const FVector& Target, const FVector& TargetForward, const FVector& SectorCenter, const float SectorRadius){ FVector ActualPoint = Target - SectorCenter; FVector RightForward = TargetForward.Rot.

UAnimMontage* ReLoadMontage = UUtilFunctionLibrary::GetAnimMontageFromAssetID(MuzzleConfig.ReLoadMontage); UAnimInstance* PistolAnim = PistolMeshRef->GetAnimInstance(); if (IsValid(PistolAnim)) { FAlphaBlend AlphaBlend; AlphaBlend.SetBlendTime(0.

if (IsAmmoEmpty && !IsReloading) { //Play Empty Sound USoundBase* EmptyAmmoSound = MuzzleConfig.EmptyAmmoSound.Get(); if (!IsValid(EmptyAmmoSound)) { EmptyAmmoSound = MuzzleConfig.EmptyAmmoSound.LoadSynchronous(); } UGameplayStatic.

UClass* ProjectileClass = UFLUtils::LoadClassEx<UClass>("/Game/ThirdContent/MPS_V2/Game/Blueprints/Projectile_BP.Projectile_BP_C");if (IsValid(ProjectileClass)){ FTransform BoneTrans = BoneSocket->GetSocketTransform(PistolMeshRef); FQuat Q.

//1.UEBuildTarget.cs//初始化UEBuildTargetprivate UEBuildTarget(TargetDescriptor InDescriptor, ReadOnlyTargetRules InRules, RulesAssembly InRulesAssembly)//2.生成PreBuild和PostBuild对应的.bat文件WriteCustomBuildStepScriptsprivate FileReference[] WriteCustomBuild.

网址：https://quixel.com/教程地址：https://help.quixel.com/hc/en-us/articles/360002127457-Installing-the-Megascans-Plugin-for-UE4-on-Windows使用UE4账号登录Quixel菜单栏找到PRODUCTS->BRIDGE 下载安装完成后打开Bridge随便找一个材质，下载如果是第一次下载，需要设置下载路径Megascans Library选择DOWNLOADSETTING

1.检查硬件和环境 检查操作系统和硬件-像素流送插件只能在运行Windows操作系统的电脑上编码视频，对电脑的GPU硬件还有一定要求。欲知详情，请查阅像素流送参考。 安装node.js -如果电脑上尚未安装node.js，则需要下载并安装。 打开网络端口-必须打开本地网络上的以下端口进行通信：80、888。如需修改默认端口，请查阅像素流送参考。 停止其他web服务器 -如果电脑正在运行其他Web服务器，则将其停止。 IP地址-需要知悉电脑的IP...

public class GameTarget : TargetRules{ public GameTarget(TargetInfo Target) : base(Target) { Type = TargetType.Game; // enable logs and debugging for Shipping builds if (Configuration == UnrealTargetConfiguration.Shipping) { BuildEnvironmen.

FRotator target_rotator = FRotator(0, CameraLimit.Target_Yaw, 0);FirstPersonCamera->SetWorldRotation(target_rotator);FRotator CurrentRotaiton = FirstPersonCamera->GetComponentRotation();Firs...

LogWindows: Error: Assertion failed: !bCleanedUpWorld [File:D:/Build/++UE4/Sync/Engine/Source/Runtime/Engine/Private/World.cpp] [Line: 4092]场景流中的子场景重复包含

使用自定义IO操作，将目标文件（txt）放在Content1.设置附加打包目录void UMyBlueprintFunctionLibrary::ExecuteTestCode(const FString &InPaksDir){ UMyBlueprintFunctionLibrary::ShowGameDir(); FString read_str; b...

FString sound_path = data.Sound;FSoftObjectPath path;path.SetPath(sound_path);TSoftObjectPtr<USoundCue> sound;if (path.IsValid()) sound = Cast<USoundCue>(path.ResolveObject()); T...

1.添加SplineComponent2.蓝图构造函数动态添加SplineMeshComponent

1.下载插件CISQLite32.创建UE4工程，添加Plugins目录和CISQLite3，将1下载到的插件放入Plugins/CISQLite33.工程添加uplugin.uproject添加"Plugins": [ { "Name": "CISQLite3", "Enabled": true }]UE工程目录.Build....

Files (x86)\Windows Kits\10\include\10.0.17134.0\um\winioctl.h(8921): error C4668: '_WIN32_WINNT_WIN10_TH2' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif' 1>C:\Program ...

方式一：UPROPERTY(EditAnywhere)TSubclassOf<class APickupAndRotateActor> ObjectToSpawn;FSCPSceneItemsDataStruct scene_item = SCPGAMEINSTANCE(this)->JsonStaticDataManager->SCPSceneItems-&g...

举个例子，如果第一次代码设置Actor的组件A为RootComponent，然后生成了蓝图，后来发现不合理，打算用B做RootComponent，注意，设置RootComponent逻辑在构造函数（Constructor）内进行。编译能通过，再次打开蓝图场景，发现会报异常警告root component cannot be attached to other components in the s...

void AHostPlayerController::UnRegisterInput(){ int32 bind_num = InputComponent->GetNumActionBindings(); for (int i = bind_num - 1; i >= 0; --i) { FInputActionBinding bind_action = InputCo...

1.CreateExport: Failed to load Outer for resource场景中蓝图对象使用的dll已经过期，需要清理掉Save和Binaries2.重载函数在cpp实现中，必须全部调用Super::XXX，不调用会导致异常，比如UMG的NativeTick不执行，Actor的Tick也不执行3.如果Actor的Tick要执行，需要在构造函数里调用Prim...

1.下载源码protobuf-3.10.02.解压源码到工作目录3.找到解压目录下的cmake/README.md4.依次按照其步骤编译README.md步骤1.打开Native Tools Command Prompt（VS2013是VS2013 x64 本机工具命令提示，VS2017是VS 2017的 x64_x86 交叉工具命令提示符），VS2013和VS2017该...

1.工具Python2.7或者3.x2.Pycharm：Pycharm下载链接3.依赖库：setuptools：setuptools官网Protobuff：ProtoBuff官网，下载all.zipProtoc：编译ProtoBuff使用，链接xlrd(xls reader)：xlrd官网Six：Six官网，下载1.9以上版本安装Python，网上找教程即可安...

std::string name = "hello world";FString HappyString(name.c_str());UE_LOG(LogTemp, Log, TEXT("=====%s"), *HappyString);

syntax = "proto3";option optimize_for = SPEED;message TestStruct{ map<int32,string> data = 1;}#include <iostream>#include <cstdio>#include <list>#include <st...

Member UPROPERTY vars reset to NULL after Actor Constructor callCDO：类默认对象（Class Default Object,简称CDO）当我们从一个Class生成蓝图时，蓝图调用构造函数，把UPROPERTY对象赋值为默认值。CDO现象：构造函数Create的UObject，在出了构造函数被释放掉，成了NULL。CD...