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UE4 骨骼网格体合并及规范

news 2024/12/14 0:54:45

实现代码

// Fill out your copyright notice in the Description page of Project Settings.#pragma once#include "CoreMinimal.h"
#include "SkeletalMeshMerge.h"
#include "Kismet/BlueprintFunctionLibrary.h"
#include "AceMeshCombiner.generated.h"/*** */
UCLASS()
class ACEMESHCOMBINE_API UAceMeshCombiner : public UBlueprintFunctionLibrary
{GENERATED_BODY()public:UFUNCTION(BlueprintCallable, Category="AceMeshCombine")static USkeletalMesh* CombineSkelet(TArray<USkeletalMesh*> SourceMeshList, bool checkValid = false){if (checkValid){TArray<USkeletalMesh*> SrcList;//检查一下，防止mesh为空的情况出现for (auto item : SourceMeshList){if (item){SrcList.Add(item);}}return CombineSkeletNotCheck(SrcList);}else{return CombineSkeletNotCheck(SourceMeshList);}}UFUNCTION(BlueprintCallable, Category="AceMeshCombine")static USkeletalMesh* CombineSkeletNotCheck(TArray<USkeletalMesh*> SourceMeshList){//如果没有需要合并的mesh 返回空if (SourceMeshList.Num() == 0)return nullptr;//只有一个mesh直接返回源mesh即可if (SourceMeshList.Num() == 1)return SourceMeshList[0];if (SourceMeshList.Num() >= 2) //模型数量大于两个才合并{// 创建一个保存最终合成模型 CompositeMeshUSkeletalMesh* CompositeMesh = NewObject<USkeletalMesh>(GetTransientPackage(), NAME_None, RF_Transient);//数组第一项的骨骼作为新的骨骼，合并的所有mesh使用同一套骨骼CompositeMesh->SetSkeleton(SourceMeshList[0]->GetSkeleton());TArray<FSkelMeshMergeSectionMapping> InForceSectionMapping;// 创建引擎合并模型实例MeshMergeUtil，参考引擎源码类SkeletalMeshMerge，里面有具体实现逻辑FSkeletalMeshMerge MeshMergeUtil(CompositeMesh, SourceMeshList, InForceSectionMapping, 0);// 把SourceMeshList合并到CompositeMeshif (MeshMergeUtil.DoMerge()){return CompositeMesh;}}return nullptr;}
};