Version: 2021.3
LanguageEnglish
  • C#

Mesh.RecalculateTangents

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Declaration

public void RecalculateTangents(Rendering.MeshUpdateFlags flags = MeshUpdateFlags.Default);

Parameters

flags Flags controlling the function behavior, see MeshUpdateFlags.

Description

Recalculates the tangents of the Mesh from the normals and texture coordinates.

After modifying the vertices and the normals of the Mesh, tangents need to be updated if the Mesh is rendered using Shaders that reference normal maps. Tangents are calculated using the vertex positions, normals and texture coordinates of the Mesh.

using UnityEngine;

public class Example : MonoBehaviour { void Start() { Mesh mesh = GetComponent<MeshFilter>().mesh; mesh.RecalculateTangents(); } }

RecalculateTangents converts Mesh vertex position, normal and UV0 data to VertexAttributeFormat.Float32 format, if the format is different.

If the Mesh does not have normals, texture coordinates or triangles, then the tangents are all set to a /(1,0,0,1)/ vector.

See Also: RecalculateNormals.