---
title: edgeCreasesSource
framework: scenekit
role: symbol
role_heading: Instance Property
path: scenekit/scngeometry/edgecreasessource
---

# edgeCreasesSource

The geometry source specifying the smoothness or sharpness of edges after surface subdivision.

## Declaration

```swift
var edgeCreasesSource: SCNGeometrySource? { get set }
```

## Discussion

Discussion This geometry source’s semantic value must be edgeCrease. Its data is an array of scalar values (that is, the source’s componentsPerVector value is 1). The value at an index in the geometry source determines the smoothness or sharpness of the edge identified by the primitive at the corresponding index in the edgeCreasesElement geometry element: a value of 0.0 specifies a completely smoothed edge, and a value of 10.0 or greater specifies an infinitely sharp edge.

## See Also

### Smoothing and Subdividing Geometry

- [subdivisionLevel](scenekit/scngeometry/subdivisionlevel.md)
- [edgeCreasesElement](scenekit/scngeometry/edgecreaseselement.md)
- [wantsAdaptiveSubdivision](scenekit/scngeometry/wantsadaptivesubdivision.md)