DynamicMeshToMeshDescription.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "Containers/Array.h"
#include "CoreMinimal.h"
#include "DynamicMesh/DynamicMesh3.h"
#include "GeometryBase.h"
#include "MeshConversionOptions.h"
#include "MeshDescription.h"
 
PREDECLARE_GEOMETRY(template<typename RealType> class TMeshTangents);
namespace UE { namespace Geometry { class FDynamicMesh3; } }
struct FMeshDescription;
struct FTriangleID;
struct FVertexID;
 
using UE::Geometry::FDynamicMesh3;
 
class FDynamicMeshToMeshDescription
{
public:
    bool bPrintDebugMessages = false;
 
    FConversionToMeshDescriptionOptions ConversionOptions;
 
    // Set MaterialID to Polygroup mapping via the reverse mapping
    void MESHCONVERSION_API SetMaterialIDMapFromInverseMap(TArrayView<const int32> PolygroupIDToMaterialIDMap);
 
    FDynamicMeshToMeshDescription()
    {
    }
 
    FDynamicMeshToMeshDescription(FConversionToMeshDescriptionOptions ConversionOptions) : ConversionOptions(ConversionOptions)
    {
    }
 
    static MESHCONVERSION_API bool HaveMatchingElementCounts(const FDynamicMesh3* DynamicMesh, const FMeshDescription* MeshDescription, bool bVerticesOnly, bool bAttributesOnly);
 
    MESHCONVERSION_API bool HaveMatchingElementCounts(const FDynamicMesh3* DynamicMesh, const FMeshDescription* MeshDescription);
 
    MESHCONVERSION_API void Convert(const FDynamicMesh3* MeshIn, FMeshDescription& MeshOut, bool bCopyTangents = false);
 
    MESHCONVERSION_API void UpdateUsingConversionOptions(const FDynamicMesh3* MeshIn, FMeshDescription& MeshOut);
 
    MESHCONVERSION_API void Update(const FDynamicMesh3* MeshIn, FMeshDescription& MeshOut, bool bUpdateNormals = true, bool bUpdateTangents = false, bool bUpdateUVs = false);
    
 
    MESHCONVERSION_API void UpdateAttributes(const FDynamicMesh3* MeshIn, FMeshDescription& MeshOut, bool bUpdateNormals, bool bUpdateTangents, bool bUpdateUVs);
 
    MESHCONVERSION_API void UpdateTangents(const FDynamicMesh3* MeshIn, FMeshDescription& MeshOut, const UE::Geometry::TMeshTangents<double>* SrcTangents);
 
 
    MESHCONVERSION_API void UpdateTangents(const FDynamicMesh3* MeshIn, FMeshDescription& MeshOut);
 
 
    MESHCONVERSION_API void UpdateVertexColors(const FDynamicMesh3* MeshIn, FMeshDescription& MeshOut);
 
 
 
    //
    // Internal functions that you can also call directly
    //
 
    MESHCONVERSION_API void Convert_NoAttributes(const FDynamicMesh3* MeshIn, FMeshDescription& MeshOut);
 
    MESHCONVERSION_API void Convert_SharedInstances(const FDynamicMesh3* MeshIn, FMeshDescription& MeshOut);
 
    MESHCONVERSION_API void Convert_NoSharedInstances(const FDynamicMesh3* MeshIn, FMeshDescription& MeshOut, bool bCopyTangents);
 
 
 
protected:
 
    MESHCONVERSION_API void ConvertPolygroupLayers(const FDynamicMesh3* MeshIn, FMeshDescription& MeshOut, const TArray<FTriangleID>& IndexToTriangleIDMap);
 
    MESHCONVERSION_API void ConvertWeightLayers(const FDynamicMesh3* MeshIn, FMeshDescription& MeshOut, const TArray<FVertexID>& IndexToVertexIDMap);
 
    MESHCONVERSION_API void ApplyVertexColorTransform(FVector4f& Color) const;
    
private:
    TArray<int32> MaterialIDToPolygroupIDMap;
};