# CastRay(PhysicsSpace, CastRayInput, PhysicsMask, Allocator)

> Find PhysicsShape that intersect the specified ray. The results indicate PhysicsShape that intersect the specified ray, in ascending order.

## Definition

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

```csharp
public static NativeArray<PhysicsSpace.CastResult> CastRay(PhysicsSpace physicsSpace, PhysicsQuery.CastRayInput input, PhysicsMask categories, Allocator allocator = Allocator.Temp)
```

### Parameters

**** (\[PhysicsSpace]\(/engine/6000.7/script-reference/unity/u2d/physics/physicsspace)): The PhysicsSpace to query.**** (\[CastRayInput]\(/engine/6000.7/script-reference/unity/u2d/physics/physicsquery/castrayinput)): The configuration of the ray to cast.**** (\[PhysicsMask]\(/engine/6000.7/script-reference/unity/u2d/physics/physicsmask)): The categories to query 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\<CastResult>](/engine/6000.7/script-reference/unity/collections/nativearray1.md) | The query results. This NativeArray must be disposed of after use otherwise leaks will occur. The exception to this is if the array is empty. |