79 lines
2.8 KiB
C#
79 lines
2.8 KiB
C#
using System.Runtime.InteropServices;
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using Unity.Collections;
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using Unity.Collections.LowLevel.Unsafe;
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using UnityEngine.Scripting;
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using UnityEngine.XR.ARSubsystems;
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namespace UnityEngine.XR.ARKit
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{
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/// <summary>
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/// ARKit implementation of the <c>XRRaycastSubsystem</c>. Do not create this directly. Use the <c>SubsystemManager</c> instead.
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/// </summary>
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[Preserve]
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public sealed class ARKitRaycastSubsystem : XRRaycastSubsystem
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{
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protected override Provider CreateProvider() => new ARKitProvider();
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class ARKitProvider : XRRaycastSubsystem.Provider
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{
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public override unsafe NativeArray<XRRaycastHit> Raycast(
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XRRaycastHit defaultRaycastHit,
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Vector2 screenPoint,
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TrackableType trackableTypeMask,
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Allocator allocator)
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{
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void* hitResults;
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int count;
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NativeApi.UnityARKit_raycast_acquireHitResults(
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screenPoint,
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trackableTypeMask,
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out hitResults,
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out count);
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var results = new NativeArray<XRRaycastHit>(count, allocator);
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NativeApi.UnityARKit_raycast_copyAndReleaseHitResults(
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UnsafeUtility.AddressOf(ref defaultRaycastHit),
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UnsafeUtility.SizeOf<XRRaycastHit>(),
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hitResults,
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results.GetUnsafePtr());
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return results;
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}
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}
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[RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
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static void RegisterDescriptor()
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{
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#if UNITY_IOS && !UNITY_EDITOR
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XRRaycastSubsystemDescriptor.RegisterDescriptor(new XRRaycastSubsystemDescriptor.Cinfo
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{
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id = "ARKit-Raycast",
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subsystemImplementationType = typeof(ARKitRaycastSubsystem),
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supportsViewportBasedRaycast = true,
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supportsWorldBasedRaycast = false,
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supportedTrackableTypes =
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TrackableType.Planes |
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TrackableType.FeaturePoint
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});
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#endif
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}
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static class NativeApi
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{
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[DllImport("__Internal")]
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public static unsafe extern void UnityARKit_raycast_acquireHitResults(
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Vector2 screenPoint,
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TrackableType filter,
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out void* hitResults,
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out int hitCount);
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[DllImport("__Internal")]
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public static unsafe extern void UnityARKit_raycast_copyAndReleaseHitResults(
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void* defaultHit,
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int stride,
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void* hitResults,
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void* dstBuffer);
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}
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}
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}
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