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ce1fd78fa6
Make pre-transformation of vertex colors during MeshDescription/DynamicMesh conversion on by default. Fixed Convert_NoSharedInstances code path that was not pre-transforming vertex colors. #rb nathan.mitchell #jira none #preflight 62d59b551062f2e6300c8cb8 [CL 21220600 by lonnie li in ue5-main branch]
102 lines
3.5 KiB
C++
102 lines
3.5 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#pragma once
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#include "Containers/Array.h"
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#include "CoreMinimal.h"
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#include "DynamicMesh/DynamicMesh3.h"
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#include "GeometryBase.h"
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#include "MeshDescription.h"
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#include "MeshTypes.h"
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// predeclare tangents template
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PREDECLARE_GEOMETRY(template<typename RealType> class TMeshTangents);
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namespace UE { namespace Geometry { class FDynamicMesh3; } }
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struct FMeshDescription;
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using UE::Geometry::FDynamicMesh3;
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/**
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* Convert FMeshDescription to FDynamicMesh3
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*
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* @todo handle missing UV/normals on MD?
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* @todo be able to ignore UV/Normals
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* @todo handle additional UV layers on MD
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* @todo option to disable UV/Normal welding
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*/
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class MESHCONVERSION_API FMeshDescriptionToDynamicMesh
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{
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public:
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/** If true, will print some possibly-helpful debugging spew to output log */
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bool bPrintDebugMessages = false;
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/** Should we initialize triangle groups on output mesh */
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bool bEnableOutputGroups = true;
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/** Should we calculate conversion index maps */
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bool bCalculateMaps = true;
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/** Ignore all mesh attributes (e.g. UV/Normal layers, color layer, material groups) */
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bool bDisableAttributes = false;
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/** Should Vertex Colors of MeshDescription be transformed from Linear to SRGB */
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bool bTransformVertexColorsLinearToSRGB = true;
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/** map from DynamicMesh triangle ID to MeshDescription FTriangleID*/
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TArray<FTriangleID> TriIDMap;
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/**
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* map from DynamicMesh vertex Id to MeshDecription FVertexID.
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* NB: due to vertex splitting, multiple DynamicMesh vertex ids
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* may map to the same MeshDescription FVertexID.
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* ( a vertex split is a result of reconciling non-manifold MeshDescription vertex )
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*/
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TArray<FVertexID> VertIDMap;
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/**
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* Various modes can be used to create output triangle groups
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*/
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enum class EPrimaryGroupMode
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{
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SetToZero,
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SetToPolygonID,
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SetToPolygonGroupID,
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SetToPolyGroup
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};
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/**
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* Which mode to use to create groups on output mesh. Ignored if bEnableOutputGroups = false.
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*/
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EPrimaryGroupMode GroupMode = EPrimaryGroupMode::SetToPolyGroup;
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/**
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* Default conversion of MeshDescription to DynamicMesh
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* @param bCopyTangents - if bDisableAttributes is false, this requests the tangent plane vectors (tangent and bitangent)
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* be stored as overlays in the MeshOut DynamicAttributeSet, provided they exist on the MeshIn
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*/
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void Convert(const FMeshDescription* MeshIn, FDynamicMesh3& MeshOut, bool bCopyTangents = false);
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/**
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* Copy tangents from MeshDescription to a FMeshTangents instance.
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* @warning Convert() must have been used to create the TargetMesh before calling this function
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*/
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void CopyTangents(const FMeshDescription* SourceMesh, const FDynamicMesh3* TargetMesh, UE::Geometry::TMeshTangents<float>* TangentsOut);
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/**
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* Copy tangents from MeshDescription to a FMeshTangents instance.
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* @warning Convert() must have been used to create the TargetMesh before calling this function
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*/
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void CopyTangents(const FMeshDescription* SourceMesh, const FDynamicMesh3* TargetMesh, UE::Geometry::TMeshTangents<double>* TangentsOut);
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protected:
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/**
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* Applies an optional Linear-to-sRGB color transform on the input. The color transform
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* is controlled by bTransformVtxColorsLinearToSRGB.
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*
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* This is the counterpart to DynamicMeshToMeshDescription::ApplyVertexColorTransform to
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* undo an applied sRGB-to-Linear transformation when the MeshDescription was built.
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*
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* @param Color color to transform
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*/
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void ApplyVertexColorTransform(FVector4f& Color) const;
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}; |