UE5 C++ SplineMesh的蓝图函数库实现方法

 UAAABlueprintFunctionLibrary

UAAABlueprintFunctionLibrary.h

// Fill out your copyright notice in the Description page of Project Settings.#pragma once#include "CoreMinimal.h"
#include "Components/SplineComponent.h"
#include "Components/SplineMeshComponent.h"
#include "Kismet/BlueprintFunctionLibrary.h"
#include "AAABlueprintFunctionLibrary.generated.h"/*** */
UENUM(BlueprintType)
enum class EMyEnum:uint8
{KeepRelativeTransform UMETA(DisplayName = "KeepRelativeTransform"),KeepWorldTransform UMETA(DisplayName = "KeepWorldTransform"),
};UCLASS()
class SPLINECPP_API UAAABlueprintFunctionLibrary : public UBlueprintFunctionLibrary
{GENERATED_BODY()
public:UFUNCTION(BlueprintCallable,Category = "Move SplineMesh")static void CanSplineMeshMovAble(USplineComponent* Spline01,USplineComponent* Spline02,UStaticMesh* SplineStaticMesh,ESplineMeshAxis::Type ForwardAxis,ESplineCoordinateSpace::Type Scapse,bool Movable,EMyEnum MyEnumParam);static void abc();
private:static TArray<USplineMeshComponent*> BBB;
};

UAAABlueprintFunctionLibrary.cpp

// Fill out your copyright notice in the Description page of Project Settings.#include "AAABlueprintFunctionLibrary.h"#include <filesystem>
TArray<USplineMeshComponent*> UAAABlueprintFunctionLibrary::BBB;void UAAABlueprintFunctionLibrary::CanSplineMeshMovAble(USplineComponent* Spline01, USplineComponent* Spline02,UStaticMesh* SplineStaticMesh, ESplineMeshAxis::Type ForwardAxis, ESplineCoordinateSpace::Type Scapse,bool Movable,EMyEnum MyEnumParam)
{abc();if (!Spline01){return;}Spline01->RegisterComponent();int32 Point = Spline01->GetNumberOfSplinePoints();if (Point<2){return;}for (int32 i = 0; i<Point-1; i++){FVector startlocation,startTangent,Endlocation,EndTangent;Spline01->GetLocationAndTangentAtSplinePoint(i,startlocation,startTangent,Scapse);Spline01->GetLocationAndTangentAtSplinePoint(i+1,Endlocation,EndTangent,Scapse);USplineMeshComponent* SplineMesh = NewObject<USplineMeshComponent>(Spline01);SplineMesh->SetMobility(EComponentMobility::Movable);SplineMesh->SetStaticMesh(SplineStaticMesh);SplineMesh->SetForwardAxis(ForwardAxis);SplineMesh->SetStartAndEnd(startlocation,startTangent,Endlocation,EndTangent);switch (MyEnumParam){case EMyEnum::KeepRelativeTransform:SplineMesh->AttachToComponent(Spline01,FAttachmentTransformRules::KeepRelativeTransform);break;case EMyEnum::KeepWorldTransform:SplineMesh->AttachToComponent(Spline01,FAttachmentTransformRules::KeepWorldTransform);break;default:break;}SplineMesh->RegisterComponent();BBB.Add(SplineMesh);}
}void UAAABlueprintFunctionLibrary::abc()
{//GEngine->AddOnScreenDebugMessage(-1,0.5f,FColor::Red,FString::Printf("%s"),BBB.GetTypeSize(),true);}