---
title: "init(vertexDescriptor:)"
framework: modelio
role: symbol
role_heading: Initializer
path: "modelio/mdlvertexdescriptor/init(vertexdescriptor:)"
---

# init(vertexDescriptor:)

Creates a new vertex descriptor by performing a deep copy of the specified vertex descriptor.

## Declaration

```swift
init(vertexDescriptor: MDLVertexDescriptor)
```

## Parameters

- `vertexDescriptor`: The vertex descriptor from which to copy information.

## Return Value

Return Value A new vertex descriptor that is an indpendent copy of the specified vertex descriptor.

## Discussion

Discussion A vertex descriptor does not own vertex data—vertex data belongs to the vertexBuffers property of the mesh that owns a vertex descriptor—so this method does not copy vertex data. A call to the copy() or copy(with:) method uses this initializer to produce a fully independent copy of the original instance.