Ue4 modular character

// Fill out your copyright notice in the Description page of Project Settings.
#pragma once
#include "CoreMinimal.h"
#include "Kismet/BlueprintFunctionLibrary.h"
#include "UObject/NoExportTypes.h"
#include "MeshMergeFunctionLibrary.generated.h"
/**
* Blueprint equivalent of FSkeleMeshMergeSectionMapping
* Info to map all the sections from a single source skeletal mesh to
* a final section entry in the merged skeletal mesh.
*/
USTRUCT(BlueprintType)
struct PROJECTNAME_API FSkelMeshMergeSectionMapping_BP
{
    GENERATED_BODY()
        /** Indices to final section entries of the merged skeletal mesh */
        UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Mesh Merge Params")
        TArray<type> SectionIDs;
};
/**
* Used to wrap a set of UV Transforms for one mesh.
*/
USTRUCT(BlueprintType)
struct PROJECTNAME_API FSkelMeshMergeUVTransform
{
    GENERATED_BODY()
        /** A list of how UVs should be transformed on a given mesh, where index represents a specific UV channel. */
        UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Mesh Merge Params")
        TArray UVTransforms;
};
/**
* Blueprint equivalent of FSkelMeshMergeUVTransforms
* Info to map all the sections about how to transform their UVs
*/
USTRUCT(BlueprintType)
struct PROJECTNAME_API FSkelMeshMergeUVTransformMapping
{
    GENERATED_BODY()
        /** For each UV channel on each mesh, how the UVS should be transformed. */
        UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Mesh Merge Params")
        TArray UVTransformsPerMesh;
};
/**
* Struct containing all parameters used to perform a Skeletal Mesh merge.
*/
USTRUCT(BlueprintType)
struct PROJECTNAME_API FSkeletalMeshMergeParams
{
    GENERATED_BODY()
        FSkeletalMeshMergeParams()
    {
        MeshSectionMappings = TArray();
        UVTransformsPerMesh = TArray();
        StripTopLODS = 0;
        bNeedsCpuAccess = false;
        bSkeletonBefore = false;
        Skeleton = nullptr;
    }
    // An optional array to map sections from the source meshes to merged section entries
    UPROPERTY(EditAnywhere, BlueprintReadWrite)
        TArray MeshSectionMappings;
    // An optional array to transform the UVs in each mesh
    UPROPERTY(EditAnywhere, BlueprintReadWrite)
        TArray UVTransformsPerMesh;
    // The list of skeletal meshes to merge.
    UPROPERTY(EditAnywhere, BlueprintReadWrite)
        TArray MeshesToMerge;
    // The number of high LODs to remove from input meshes
    UPROPERTY(EditAnywhere, BlueprintReadWrite)
        int32 StripTopLODS;
    // Whether or not the resulting mesh needs to be accessed by the CPU for any reason (e.g. for spawning particle effects).
    UPROPERTY(EditAnywhere, BlueprintReadWrite)
        uint32 bNeedsCpuAccess : 1;
    // Update skeleton before merge. Otherwise, update after.
    // Skeleton must also be provided.
    UPROPERTY(EditAnywhere, BlueprintReadWrite)
        uint32 bSkeletonBefore : 1;
    // Skeleton that will be used for the merged mesh.
    // Leave empty if the generated skeleton is OK.
    UPROPERTY(EditAnywhere, BlueprintReadOnly)
        class USkeleton* Skeleton;
};
/**
*
*/
UCLASS()
class PROJECTNAME_API UMeshMergeFunctionLibrary : public UBlueprintFunctionLibrary
{
    GENERATED_BODY()
public:
    /**
    * Merges the given meshes into a single mesh.
    * @return The merged mesh (will be invalid if the merge failed).
    */
    UFUNCTION(BlueprintCallable, Category = "Mesh Merge", meta = (UnsafeDuringActorConstruction = "true"))
        static class USkeletalMesh* MergeMeshes(const FSkeletalMeshMergeParams& Params);
};
~~~

Source: docs.unrealengine.com

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