# CreateSegments(ReadOnlySpan<Vector2>, PhysicsTransform, bool, Allocator)

> Create multiple ChainSegmentGeometry from a set of vertices. The rules for interpreting the specified vertices when creating segments is described in PhysicsChain.

## Definition

* **Type:** Method
* **Namespace:** [Unity.U2D.Physics](/engine/6000.6/script-reference/unity/u2d/physics.md)
* **Assembly:** UnityEngine.PhysicsCore2DModule

```csharp
public static NativeArray<ChainSegmentGeometry> CreateSegments(ReadOnlySpan<Vector2> vertices, PhysicsTransform transform, bool isLoop, Allocator allocator = Allocator.Temp)
```

### Parameters

**** (\[ReadOnlySpan\<Vector2>]\(https\://learn.microsoft.com/dotnet/api/system.readonlyspan-1)): The vertices to create the ChainSegmentGeometry from.**** (\[PhysicsTransform]\(/engine/6000.6/script-reference/unity/u2d/physics/physicstransform)): The transform used to specify where the geometry is positioned.**** (\[bool]\(https\://learn.microsoft.com/dotnet/api/system.boolean)): Indicates a closed chain formed by connecting the first and last vertices specified. This changes how the vertices are interpreted.**** (\[Allocator]\(/engine/6000.6/script-reference/unity/collections/allocator)): The memory allocator to use for the results. This can only be [Allocator.Temp](/engine/6000.6/script-reference/unity/collections/allocator/temp.md), [Allocator.TempJob](/engine/6000.6/script-reference/unity/collections/allocator/tempjob.md) or [Allocator.Persistent](/engine/6000.6/script-reference/unity/collections/allocator/persistent.md).

### Returns

| Type                                                                                                    | Description                                                                                                                                                   |
| ------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| [NativeArray\<ChainSegmentGeometry>](/engine/6000.6/script-reference/unity/collections/nativearray1.md) | The created ChainSegment geometry. This NativeArray must be disposed of after use otherwise leaks will occur. The exception to this is if the array is empty. |