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TMeshTangents

[TMeshTangents](API\Runtime\GeometryCore\TMeshTangents) is a utility class that can calculate and store various types of tangent vectors for a FDynamicMesh.

API > API/Runtime > API/Runtime/GeometryCore

TMeshTangents is a utility class that can calculate and store various types of tangent vectors for a FDynamicMesh.

   
Name TMeshTangents
Type class
Header File /Engine/Source/Runtime/GeometryCore/Public/DynamicMesh/MeshTangents.h
Include Path #include "DynamicMesh/MeshTangents.h"

Syntax

template<typename RealType>  
class TMeshTangents

Constructors

Name Remarks Include Path Unreal Specifiers
  DynamicMesh/MeshTangents.h  

TMeshTangents ( const FDynamicMesh3* Mesh
)

   DynamicMesh/MeshTangents.h  

Functions

Public

Name Remarks Include Path Unreal Specifiers

void ComputeTriangleTangents ( const FDynamicMeshUVOverlay* UVOverlay,
bool bOrthogonalize
)

 Compute per-triangle tangents for the given UV Overlay DynamicMesh/MeshTangents.h  

void ComputeTriVertexTangents ( const FDynamicMeshNormalOverlay* NormalOverlay,
const FDynamicMeshUVOverlay* UVOverlay,
const FComputeTangentsOptions& Options
)

 Calculate per-triangle tangent spaces based on the given per-triangle normal and UV overlays. DynamicMesh/MeshTangents.h  

bool CopyToOverlays ( FDynamicMesh3& MeshToSet
) const

 Set Tangents on mesh overlays DynamicMesh/MeshTangents.h  

bool CopyTriVertexTangents ( const FDynamicMesh3& SourceMesh
)

 Initialize Tangents from the FDynamicMeshAttributeSet of SourceMesh DynamicMesh/MeshTangents.h  

void CopyTriVertexTangents ( const TMeshTangents< OtherRealType >& OtherTangents
)

 Initialize Tangents from other Tangents set DynamicMesh/MeshTangents.h  

const TArray< TVector< RealType > > & GetBitangents()

   DynamicMesh/MeshTangents.h  

const TArray< int32 > & GetDegenerateTris()

   DynamicMesh/MeshTangents.h  

void GetInterpolatedTriangleTangent ( int32 TriangleID,
const UE::Math::TVector< RealType >& BaryCoords,
UE::Math::TVector< RealType >& TangentOut,
UE::Math::TVector< RealType >& BitangentOut
) const

   DynamicMesh/MeshTangents.h  

const FDynamicMesh3 * GetMesh()

 Get the target mesh. DynamicMesh/MeshTangents.h  

void GetPerTriangleTangent ( int32 TriangleID,
int32 TriVertIdx,
VectorType& TangentOut,
VectorType& BitangentOut
) const

 Return tangent and bitangent at a vertex of triangle for per-triangle computed tangents DynamicMesh/MeshTangents.h  

void GetPerTriangleTangent ( int32 TriangleID,
int32 TriVertIdx,
UE::Math::TVector< RealType >& TangentOut,
UE::Math::TVector< RealType >& BitangentOut
) const

 Return tangent and bitangent at a vertex of triangle for per-triangle computed tangents DynamicMesh/MeshTangents.h  

const TArray< TVector< RealType > > & GetTangents()

   DynamicMesh/MeshTangents.h  

void GetTriangleVertexTangentVectors ( int32 TriangleID,
int32 TriVertexIndex,
OtherVectorType& TangentOut,
OtherVectorType& BitangentOut
) const

 Get tangent and bitangent at a vertex of a triangle for per-triangle computed tangents DynamicMesh/MeshTangents.h  

void InitializeTriangleTangents ( bool bClearToZero
)

 Per-Triangle Tangents Number of Tangents is NumTriangles Initialize buffer sizes to one tangent/bitangent per mesh triangle DynamicMesh/MeshTangents.h  

void InitializeTriVertexTangents ( bool bClearToZero
)

 Per-Triangle-Vertex Tangents Number of Tangents is NumTriangles * 3 Set internal buffer sizes suitable for calculating per-triangle tangents. DynamicMesh/MeshTangents.h  

void SetMesh ( const FDynamicMesh3* MeshIn
)

   DynamicMesh/MeshTangents.h  

void SetPerTriangleTangent ( int TriangleID,
int TriVertIdx,
const TVector< RealType >& Tangent,
const TVector< RealType >& Bitangent
)

 Set tangent and bitangent at a vertex of triangle for per-triangle computed tangents. DynamicMesh/MeshTangents.h  

Protected

Name Remarks Include Path Unreal Specifiers

void ComputeMikkTStyleTangents ( const FDynamicMeshNormalOverlay* NormalOverlay,
const FDynamicMeshUVOverlay* UVOverlay,
const FComputeTangentsOptions& Options
)

 Calculate MikkT-space-style tangents. DynamicMesh/MeshTangents.h  

void ComputeSeparatePerTriangleTangents ( const FDynamicMeshNormalOverlay* NormalOverlay,
const FDynamicMeshUVOverlay* UVOverlay,
const FComputeTangentsOptions& Options
)

 Calculate per-triangle tangents and then projected to overlay normals at each triangle-vertex DynamicMesh/MeshTangents.h  

void SetTangentCount ( int Count,
bool bClearToZero
)

 Set the size of the Tangents array to Count, and optionally clear all values to (0,0,0) DynamicMesh/MeshTangents.h  

Static

Name Remarks Include Path Unreal Specifiers

static bool ComputeDefaultOverlayTangents ( FDynamicMesh3& Mesh
)

 Convenience function to compute tangents from the mesh attribute set's primary UVs and normals DynamicMesh/MeshTangents.h  

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