# MeshDeformParameter.VertexBuffers The vertices requested by the developer when they defined their custom deformations. These will be passed into their custom deformation functions. ``` struct VertexBuffers ``` ## Topics ### Accessing geometry buffers [`let positions: MeshDeformParameter.VertexBuffers.Data?`](/documentation/RealityKit/MeshDeformParameter/VertexBuffers/positions) The positions buffer, if the custom deformer author specified it. [`let normals: MeshDeformParameter.VertexBuffers.Data?`](/documentation/RealityKit/MeshDeformParameter/VertexBuffers/normals) The normals buffer, if the custom deformer author specified it. [`let tangents: MeshDeformParameter.VertexBuffers.Data?`](/documentation/RealityKit/MeshDeformParameter/VertexBuffers/tangents) The tangents buffer, if the custom deformer author specified it. [`let bitangents: MeshDeformParameter.VertexBuffers.Data?`](/documentation/RealityKit/MeshDeformParameter/VertexBuffers/bitangents) The bitangents buffer, if the custom deformer author specified it. ### Accessing texture coordinates [`let uvs: MeshDeformParameter.VertexBuffers.Data?`](/documentation/RealityKit/MeshDeformParameter/VertexBuffers/uvs) The uvs buffer, if the custom deformer author specified it [`let uv1s: MeshDeformParameter.VertexBuffers.Data?`](/documentation/RealityKit/MeshDeformParameter/VertexBuffers/uv1s) The uv1s buffer, if the custom deformer author specified it [`let uv2s: MeshDeformParameter.VertexBuffers.Data?`](/documentation/RealityKit/MeshDeformParameter/VertexBuffers/uv2s) The uv2s buffer, if the custom deformer author specified it [`let uv3s: MeshDeformParameter.VertexBuffers.Data?`](/documentation/RealityKit/MeshDeformParameter/VertexBuffers/uv3s) The uv3s buffer, if the custom deformer author specified it [`let uv4s: MeshDeformParameter.VertexBuffers.Data?`](/documentation/RealityKit/MeshDeformParameter/VertexBuffers/uv4s) The uv4s buffer, if the custom deformer author specified it [`let uv5s: MeshDeformParameter.VertexBuffers.Data?`](/documentation/RealityKit/MeshDeformParameter/VertexBuffers/uv5s) The uv5s buffer, if the custom deformer author specified it [`let uv6s: MeshDeformParameter.VertexBuffers.Data?`](/documentation/RealityKit/MeshDeformParameter/VertexBuffers/uv6s) The uv6s buffer, if the custom deformer author specified it [`let uv7s: MeshDeformParameter.VertexBuffers.Data?`](/documentation/RealityKit/MeshDeformParameter/VertexBuffers/uv7s) The uv7s buffer, if the custom deformer author specified it ### Inspecting buffer storage [`let count: Int`](/documentation/RealityKit/MeshDeformParameter/VertexBuffers/count) The number of elements in each of the specified buffers. [`struct Data`](/documentation/RealityKit/MeshDeformParameter/VertexBuffers/Data) Provides low-level information about the memory allocation of the buffers. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)