---
title: tessellationFactorStepFunction
framework: metal
role: symbol
role_heading: Instance Property
path: metal/mtlrenderpipelinedescriptor/tessellationfactorstepfunction
---

# tessellationFactorStepFunction

The step function for determining the tessellation factors for a patch from the tessellation factor buffer.

## Declaration

```swift
var tessellationFactorStepFunction: MTLTessellationFactorStepFunction { get set }
```

## Discussion

Discussion The default value is MTLTessellationFactorStepFunction.constant.

## See Also

### Specifying tessellation state

- [maxTessellationFactor](metal/mtlrenderpipelinedescriptor/maxtessellationfactor.md)
- [isTessellationFactorScaleEnabled](metal/mtlrenderpipelinedescriptor/istessellationfactorscaleenabled.md)
- [tessellationFactorFormat](metal/mtlrenderpipelinedescriptor/tessellationfactorformat.md)
- [tessellationControlPointIndexType](metal/mtlrenderpipelinedescriptor/tessellationcontrolpointindextype.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)