UE5 C++ SplineMesh蓝图函数库实现（小白笔记）

最新推荐文章于 2025-01-12 16:43:31 发布

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#ue5 #笔记

该文章介绍了一个在UE5中使用C++实现的蓝图函数库，用于处理SplineMesh组件。函数库包含了一个名为CanSplineMeshMovAble的方法，该方法根据给定的参数创建并附加SplineMesh到SplineComponent上，同时考虑了不同的变换规则（EMyEnum枚举类型）。此外，还定义了一个静态数组BBB来存储创建的SplineMesh组件。

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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);
	
}