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> Unreal Engine API Reference > Developer > MeshUtilities > IMeshUtilities > IMeshUtilities::CalculateTriangleTangent

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IMeshUtilities::CalculateTriangleTangent

Calculate The tangent, bi normal and normal for the triangle define by the tree SoftSkinVertex.

Windows

MacOS

Linux

References

Module	MeshUtilities
Header	/Engine/Source/Developer/MeshUtilities/Public/MeshUtilities.h
Include	#include "MeshUtilities.h"

Syntax

void CalculateTriangleTangent
(
    const FSoftSkinVertex & VertexA,
    const FSoftSkinVertex & VertexB,
    const FSoftSkinVertex & VertexC,
    TArray< FVector > & OutTangents,
    float CompareThreshold
)

Remarks

Calculate The tangent, bi normal and normal for the triangle define by the tree SoftSkinVertex.

@note The function will always fill properly the OutTangents array with 3 FVector. If the triangle is degenerated the OutTangent will contain zeroed vectors.

Parameters

Parameter	Description
VertexA	First triangle vertex.
VertexB	Second triangle vertex.
VertexC	Third triangle vertex.
OutTangents	The function allocate the TArray with 3 FVector, to represent the triangle tangent, bi normal and normal.
CompareThreshold	The threshold use to compare a tangent vector with zero.

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