---
title: "init(indices:primitiveType:)"
framework: scenekit
role: symbol
role_heading: Initializer
path: "scenekit/scngeometryelement/init(indices:primitivetype:)"
---

# init(indices:primitiveType:)

Creates a geometry element from the specified array of index values.

## Declaration

```swift
convenience init<IndexType>(indices: [IndexType], primitiveType: SCNGeometryPrimitiveType) where IndexType : FixedWidthInteger
```

## Parameters

- `indices`: An array of index values, each of which identifies a vertex in a geometry source.
- `primitiveType`: The drawing primitive that connects vertices when rendering the geometry element. For possible values, see doc://com.apple.scenekit/documentation/SceneKit/SCNGeometryPrimitiveType.

## Discussion

Discussion SceneKit connects the vertices in the order specified by the indices array, arranged according to the primitiveType parameter.This initializer is equivalent to the init(data:primitiveType:primitiveCount:bytesPerIndex:) initializer, but does not require an intermediary Data object; instead, it automatically infers the necessary allocation size and bytesPerIndex values based on the contents of the indices array. To create a custom SCNGeometry object from the geometry element, use the init(sources:elements:) initializer.

## See Also

### Creating a Geometry Element

- [init(data:primitiveType:primitiveCount:bytesPerIndex:)](scenekit/scngeometryelement/init(data:primitivetype:primitivecount:bytesperindex:).md)