---
title: bitangents
framework: realitykit
role: symbol
role_heading: Instance Property
path: realitykit/meshdeformparameter/vertexbuffers/bitangents
---

# bitangents

The bitangents buffer, if the custom deformer author specified it.

## Declaration

```swift
let bitangents: MeshDeformParameter<InputBuffer, OutputBuffer>.VertexBuffers<Buffer>.Data?
```

## See Also

### Accessing geometry buffers

- [positions](realitykit/meshdeformparameter/vertexbuffers/positions.md)
- [normals](realitykit/meshdeformparameter/vertexbuffers/normals.md)
- [tangents](realitykit/meshdeformparameter/vertexbuffers/tangents.md)