The general interface for managing storage of vertex and index data used in loading, processing, and rendering meshes.


protocol MDLMeshBuffer


Model I/O creates buffers using an allocator that you specify when loading mesh data from a file with the MDLAsset class or generating meshes with the MDLMesh class. You can also create buffers using an allocator method such as newBuffer(with:type:). The allocator you choose determines the concrete class of a mesh buffer and thus its storage mechanism—for example, the MetalKit MTKMeshBufferAllocator class allocates MTKMeshBuffer objects, which share storage with Metal buffers for use in rendering.


Working with Data in a Buffer

func fill(Data, offset: Int)

Writes the specified data into the buffer.


func map() -> MDLMeshBufferMap

Provides direct, read-only access to the buffer’s contents.


var length: Int

The data size of the buffer, in bytes.


Inspecting a Buffer

var allocator: MDLMeshBufferAllocator

The allocator object that created the buffer.


var zone: MDLMeshBufferZone

The memory pool from which the buffer was created.


var type: MDLMeshBufferType

The type of data contained in a buffer.



enum MDLMeshBufferType

Options for the content of a mesh buffer, used by the type property and by MDLMeshBufferAllocator methods for creating buffers.


See Also

Managing Mesh Data

protocol MDLMeshBufferAllocator

The general interface for managing allocation of data buffers to be used in loading, processing, and rendering meshes.

class MDLMeshBufferData

A memory buffer that stores vertex or index data for a Model I/O mesh.

class MDLMeshBufferDataAllocator

A basic allocator implementation that allocates from main memory using data objects.

class MDLMeshBufferMap

An object that manages access to a memory buffer used for the data storage of a Model I/O mesh.

protocol MDLMeshBufferZone

The general interface for logical pools of memory used in allocation of related mesh data buffers.

class MDLMeshBufferZoneDefault

A standard implementation of the MDLMeshBufferZone protocol.

class MDLVertexAttribute

A description of the format of per-vertex data for a single vertex attribute in a mesh object.

class MDLVertexAttributeData

An object that provides convenience access to vertex data for a specific vertex attribute of a mesh.

class MDLVertexBufferLayout

A MDLVertexBufferLayout object describes layout information for a vertex buffer in a MDLMesh object. A collection of vertex layer objects, vertex attribute objects, and additional information forms a MDLVertexDescriptor object, which completely describes the layout of vertex buffers for a mesh.

class MDLVertexDescriptor

A description of the structure, format, and layout for vertex data buffers associated with a mesh.