# GetBatchVelocity(ReadOnlySpan<PhysicsBody>, Allocator)

> Get the velocity for a batch of PhysicsBody.

## Definition

* **Type:** Method
* **Namespace:** [Unity.U2D.Physics](/engine/6000.7/script-reference/unity/u2d/physics.md)
* **Assembly:** UnityEngine.PhysicsCore2DModule

```csharp
public static NativeArray<PhysicsBody.BatchVelocity> GetBatchVelocity(ReadOnlySpan<PhysicsBody> bodies, Allocator allocator = Allocator.Temp)
```

### Parameters

**** (\[ReadOnlySpan\<PhysicsBody>]\(https\://learn.microsoft.com/dotnet/api/system.readonlyspan-1)): The bodies to retrieve the batch of velocity for.**** (\[Allocator]\(/engine/6000.7/script-reference/unity/collections/allocator)): The memory allocator to use for the results. This can only be [Allocator.Temp](/engine/6000.7/script-reference/unity/collections/allocator/temp.md), [Allocator.TempJob](/engine/6000.7/script-reference/unity/collections/allocator/tempjob.md) or [Allocator.Persistent](/engine/6000.7/script-reference/unity/collections/allocator/persistent.md).

### Returns

| Type                                                                                             | Description                                     |
| ------------------------------------------------------------------------------------------------ | ----------------------------------------------- |
| [NativeArray\<BatchVelocity>](/engine/6000.7/script-reference/unity/collections/nativearray1.md) | The batch of velocity for the specified bodies. |