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#rb none #lockdown Nick.Penwarden #ROBOMERGE-OWNER: ryan.gerleve #ROBOMERGE-AUTHOR: ben.marsh #ROBOMERGE-SOURCE: CL 4662404 in //UE4/Main/... #ROBOMERGE-BOT: ENGINE (Main -> Dev-Networking) [CL 4662413 by ben marsh in Dev-Networking branch]
97 lines
2.6 KiB
C++
97 lines
2.6 KiB
C++
// Copyright 1998-2019 Epic Games, Inc. All Rights Reserved.
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#pragma once
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#include "CoreMinimal.h"
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#include "MeshUtilitiesCommon.h"
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#include "Allocator2D.h"
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struct FMeshChart
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{
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uint32 FirstTri;
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uint32 LastTri;
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FVector2D MinUV;
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FVector2D MaxUV;
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float UVArea;
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FVector2D UVScale;
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FVector2D WorldScale;
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FVector2D PackingScaleU;
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FVector2D PackingScaleV;
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FVector2D PackingBias;
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int32 Join[4];
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int32 Id; // Store a unique id so that we can come back to the initial Charts ordering when necessary
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};
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struct FOverlappingCorners;
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class MESHUTILITIESCOMMON_API FLayoutUV
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{
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public:
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/**
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* Abstract triangle mesh view interface that may be used by any module without introducing
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* a dependency on a concrete mesh type (and thus potentially circular module references).
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* This abstraction results in a performance penalty due to virtual dispatch,
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* however it is expected to be insignificant compared to the rest of work done by FLayoutUV
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* and cache misses due to indexed vertex data access.
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*/
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struct IMeshView
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{
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virtual ~IMeshView() {}
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virtual uint32 GetNumIndices() const = 0;
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virtual FVector GetPosition(uint32 Index) const = 0;
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virtual FVector GetNormal(uint32 Index) const = 0;
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virtual FVector2D GetInputTexcoord(uint32 Index) const = 0;
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virtual void InitOutputTexcoords(uint32 Num) = 0;
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virtual void SetOutputTexcoord(uint32 Index, const FVector2D& Value) = 0;
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};
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FLayoutUV( IMeshView& InMeshView, uint32 InTextureResolution );
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int32 FindCharts( const FOverlappingCorners& OverlappingCorners );
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bool FindBestPacking();
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void CommitPackedUVs();
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void SetVersion( ELightmapUVVersion Version ) { LayoutVersion = Version; }
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private:
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bool PositionsMatch( uint32 a, uint32 b ) const;
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bool NormalsMatch( uint32 a, uint32 b ) const;
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bool UVsMatch( uint32 a, uint32 b ) const;
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bool VertsMatch( uint32 a, uint32 b ) const;
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float TriangleUVArea( uint32 Tri ) const;
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void DisconnectChart( FMeshChart& Chart, uint32 Side );
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void ScaleCharts( float UVScale );
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bool PackCharts();
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void OrientChart( FMeshChart& Chart, int32 Orientation );
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void RasterizeChart( const FMeshChart& Chart, uint32 RectW, uint32 RectH );
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float GetUVEqualityThreshold() const;
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IMeshView& MeshView;
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uint32 TextureResolution;
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TArray< FVector2D > TexCoords;
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TArray< uint32 > SortedTris;
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TArray< FMeshChart > Charts;
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float TotalUVArea;
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float MaxChartSize;
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FAllocator2D LayoutRaster;
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FAllocator2D ChartRaster;
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FAllocator2D BestChartRaster;
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FAllocator2DShader ChartShader;
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ELightmapUVVersion LayoutVersion;
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int32 NextMeshChartId;
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};
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