41 lines
1.8 KiB
Markdown
41 lines
1.8 KiB
Markdown
---
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uid: arkit-raycasts
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---
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# Ray casts
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This page is a supplement to the AR Foundation [Ray casts](xref:arfoundation-raycasts) manual. The following sections only contain information about APIs where ARKit exhibits unique platform-specific behavior.
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[!include[](snippets/arf-docs-tip.md)]
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## Optional feature support
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ARKit implements the following optional features of AR Foundation's [XRRaycastSubsystem](xref:UnityEngine.XR.ARSubsystems.XRRaycastSubsystem):
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| Feature | Descriptor Property | Supported |
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| :------------------------- | :------------------ | :-------: |
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| **Viewport based raycast** | [supportsViewportBasedRaycast](xref:UnityEngine.XR.ARSubsystems.XRRaycastSubsystemDescriptor.supportsViewportBasedRaycast)| Yes |
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| **World based raycast** | [supportsWorldBasedRaycast](xref:UnityEngine.XR.ARSubsystems.XRRaycastSubsystemDescriptor.supportsWorldBasedRaycast) | |
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| **Tracked raycasts** | [supportsTrackedRaycasts](xref:UnityEngine.XR.ARSubsystems.XRRaycastSubsystemDescriptor.supportsTrackedRaycasts) | iOS 13+ |
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### Supported trackables
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ARKit supports ray casting against the following trackable types:
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| TrackableType | Supported |
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| :---------------------- | :-------: |
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| **BoundingBox** | |
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| **Depth** | |
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| **Face** | |
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| **FeaturePoint** | Yes |
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| **Image** | |
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| **Planes** | Yes |
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| **PlaneEstimated** | Yes |
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| **PlaneWithinBounds** | Yes |
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| **PlaneWithinInfinity** | Yes |
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| **PlaneWithinPolygon** | Yes |
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> [!NOTE]
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> Refer to AR Foundation [Ray cast platform support](xref:arfoundation-raycasts-platform-support) for more information on the optional features of the Raycast subsystem.
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[!include[](snippets/apple-arkit-trademark.md)]
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