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# Conversion Functions

Convert between Metal and Model I/O vertex representations.

## Topics

### Converting Between Model I/O and Metal Vertex Descriptors

[`MTKMetalVertexDescriptorFromModelIO`](/documentation/MetalKit/MTKMetalVertexDescriptorFromModelIO(_:))

Returns a partially converted Metal vertex descriptor.

[`MTKMetalVertexDescriptorFromModelIOWithError`](/documentation/MetalKit/MTKMetalVertexDescriptorFromModelIOWithError)

Returns a partially converted Metal vertex descriptor, reporting any error that occurs.

[`MTKModelIOVertexDescriptorFromMetal`](/documentation/MetalKit/MTKModelIOVertexDescriptorFromMetal(_:))

Returns a partially converted Model I/O vertex descriptor.

[`MTKModelIOVertexDescriptorFromMetalWithError`](/documentation/MetalKit/MTKModelIOVertexDescriptorFromMetalWithError)

Returns a partially converted Model I/O vertex descriptor, reporting any error that occurs.

### Converting Between Model I/O and Metal Vertex Formats

[`MTKMetalVertexFormatFromModelIO`](/documentation/MetalKit/MTKMetalVertexFormatFromModelIO(_:))

Returns a converted Metal vertex format.

[`MTKModelIOVertexFormatFromMetal`](/documentation/MetalKit/MTKModelIOVertexFormatFromMetal(_:))

Returns a converted Model I/O vertex format.


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