---
title: tessellationControlPointIndexType
framework: metal
role: symbol
role_heading: Instance Property
path: metal/mtlrenderpipelinedescriptor/tessellationcontrolpointindextype
---

# tessellationControlPointIndexType

The size of the control point indices in a control point index buffer.

## Declaration

```swift
var tessellationControlPointIndexType: MTLTessellationControlPointIndexType { get set }
```

## Discussion

Discussion The default value is MTLTessellationControlPointIndexType.none; use this value when drawing patches without a control point index buffer. This value needs to be either MTLTessellationControlPointIndexType.uint16 or MTLTessellationControlPointIndexType.uint32 when drawing patches with indexed control points.

## See Also

### Related Documentation

- [drawIndexedPatches(numberOfPatchControlPoints:patchStart:patchCount:patchIndexBuffer:patchIndexBufferOffset:controlPointIndexBuffer:controlPointIndexBufferOffset:instanceCount:baseInstance:)](metal/mtlrendercommandencoder/drawindexedpatches(numberofpatchcontrolpoints:patchstart:patchcount:patchindexbuffer:patchindexbufferoffset:controlpointindexbuffer:controlpointindexbufferoffset:instancecount:baseinstance:).md)
- [drawIndexedPatches(numberOfPatchControlPoints:patchIndexBuffer:patchIndexBufferOffset:controlPointIndexBuffer:controlPointIndexBufferOffset:indirectBuffer:indirectBufferOffset:)](metal/mtlrendercommandencoder/drawindexedpatches(numberofpatchcontrolpoints:patchindexbuffer:patchindexbufferoffset:controlpointindexbuffer:controlpointindexbufferoffset:indirectbuffer:indirectbufferoffset:).md)

### Specifying tessellation state

- [maxTessellationFactor](metal/mtlrenderpipelinedescriptor/maxtessellationfactor.md)
- [isTessellationFactorScaleEnabled](metal/mtlrenderpipelinedescriptor/istessellationfactorscaleenabled.md)
- [tessellationFactorFormat](metal/mtlrenderpipelinedescriptor/tessellationfactorformat.md)
- [tessellationFactorStepFunction](metal/mtlrenderpipelinedescriptor/tessellationfactorstepfunction.md)
- [tessellationOutputWindingOrder](metal/mtlrenderpipelinedescriptor/tessellationoutputwindingorder.md)
- [tessellationPartitionMode](metal/mtlrenderpipelinedescriptor/tessellationpartitionmode.md)
- [MTLTessellationFactorFormat](metal/mtltessellationfactorformat.md)
- [MTLTessellationControlPointIndexType](metal/mtltessellationcontrolpointindextype.md)
- [MTLTessellationFactorStepFunction](metal/mtltessellationfactorstepfunction.md)
- [MTLTessellationPartitionMode](metal/mtltessellationpartitionmode.md)