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#jira UE-138058, UE-138126 #preflight trivial #rb trivial #ROBOMERGE-AUTHOR: michael.balzer #ROBOMERGE-SOURCE: CL 18511647 in //UE5/Release-5.0/... via CL 18511723 #ROBOMERGE-BOT: STARSHIP (Release-Engine-Staging -> Release-Engine-Test) (v899-18417669) [CL 18511762 by michael balzer in ue5-release-engine-test branch]
78 lines
2.7 KiB
C++
78 lines
2.7 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#pragma once
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#include "CoreMinimal.h"
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class UMaterialInterface;
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class UStaticMesh;
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struct FStaticMaterial;
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namespace UE
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{
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namespace AssetUtils
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{
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/**
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* Information about a mesh material slot (eg a FStaticMaterial)
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*/
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struct MODELINGCOMPONENTS_API FStaticMeshMaterialSlot
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{
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UMaterialInterface* Material;
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FName SlotName;
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};
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/**
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* Information about the materials assigned to a StaticMesh LOD.
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* The StaticMesh stores a Material List and per-mesh-Section assignments into that Material List.
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* This relationship is not necessarily 1-1, multiple Sections can use the same material, and there
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* can be arbitrary remappings, and the storage of this information is somewhat scattered across StaticMesh.
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* This data structure encapsulates the critical information needed to (eg) assign materials
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* to a new mesh/component such that they match the rendered materials on an existing StaticMesh.
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*
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* The GetStaticMeshAssetMaterials() function can be used to build this data structure for a given StaticMesh LOD.
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*/
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struct MODELINGCOMPONENTS_API FStaticMeshLODMaterialSetInfo
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{
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/** MaterialSlots array is a copy of the UStaticMesh::StaticMaterials array/data */
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TArray<FStaticMeshMaterialSlot> MaterialSlots;
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/** LOD Index the data below refers to */
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int32 LODIndex = 0;
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/** Number of Sections on the mesh LOD */
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int32 NumSections = 0;
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/** The index into MaterialSlots array of the Material assigned to each Section, in linear order */
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TArray<int32> SectionSlotIndexes;
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/** The Material assigned to each Section, in linear order */
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TArray<UMaterialInterface*> SectionMaterials;
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};
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/**
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* Extract information about the material set for a given LODIndex of a StaticMeshAsset
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*/
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MODELINGCOMPONENTS_API bool GetStaticMeshLODAssetMaterials(
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UStaticMesh* StaticMeshAsset,
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int32 LODIndex,
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FStaticMeshLODMaterialSetInfo& MaterialInfoOut);
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/**
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* Construct the linear per-section material list for a given LODIndex of a StaticMeshAsset
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* @param MaterialListOut the list of linear per-section indices into the Asset Material List
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* @param MaterialIndexOut the corresponding list of linear per-section indices into the Asset Material List
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*/
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MODELINGCOMPONENTS_API bool GetStaticMeshLODMaterialListBySection(
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UStaticMesh* StaticMeshAsset,
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int32 LODIndex,
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TArray<UMaterialInterface*>& MaterialListOut,
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TArray<int32>& MaterialIndexOut);
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/**
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* Generate a new unique material slot name for the given SlotMaterial and NewSlotIndex,
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* ensuring that the name is not already used in the set of ExistingMaterials
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*/
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MODELINGCOMPONENTS_API FName GenerateNewMaterialSlotName(
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const TArray<FStaticMaterial>& ExistingMaterials,
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UMaterialInterface* SlotMaterial,
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int32 NewSlotIndex);
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}
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} |