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85 行
2.2 KiB
85 行
2.2 KiB
using System.Collections;
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using System.Collections.Generic;
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using UnityEngine;
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using UnityEngine.XR.ARFoundation;
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using UnityEngine.XR.ARSubsystems;
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/// <summary>
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/// Visualizes the eye gaze position in face space for an <see cref="ARFace"/>.
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/// </summary>
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/// <remarks>
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/// Face space is the space where the origin is the transform of an <see cref="ARFace"/>.
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/// </remarks>
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[RequireComponent(typeof(ARFace))]
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public class FixationPoint3DVisualizer : MonoBehaviour
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{
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[SerializeField]
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GameObject m_FixationRayPrefab;
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public GameObject fixationRayPrefab
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{
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get => m_FixationRayPrefab;
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set => m_FixationRayPrefab = value;
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}
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GameObject m_FixationRayGameObject;
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ARFace m_Face;
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XRFaceSubsystem m_FaceSubsystem;
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void Awake()
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{
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m_Face = GetComponent<ARFace>();
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}
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void CreateEyeGameObjectsIfNecessary()
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{
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if (m_FixationRayGameObject == null && m_Face.fixationPoint != null)
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{
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m_FixationRayGameObject = Instantiate(m_FixationRayPrefab, m_Face.transform);
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m_FixationRayGameObject.SetActive(false);
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}
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}
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void SetVisible(bool visible)
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{
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if (m_FixationRayGameObject != null)
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m_FixationRayGameObject.SetActive(visible);
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}
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void OnEnable()
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{
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var faceManager = FindObjectOfType<ARFaceManager>();
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if (faceManager != null && faceManager.subsystem != null && faceManager.subsystem.SubsystemDescriptor.supportsEyeTracking)
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{
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m_FaceSubsystem = (XRFaceSubsystem)faceManager.subsystem;
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m_Face.updated += OnUpdated;
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}
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else
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{
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enabled = false;
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}
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}
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void OnDisable()
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{
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m_Face.updated -= OnUpdated;
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SetVisible(false);
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}
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void OnUpdated(ARFaceUpdatedEventArgs eventArgs)
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{
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CreateEyeGameObjectsIfNecessary();
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SetVisible((m_Face.trackingState == TrackingState.Tracking) && (ARSession.state > ARSessionState.Ready));
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UpdateFixationPoint();
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}
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void UpdateFixationPoint()
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{
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if (m_FixationRayGameObject != null)
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{
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m_FixationRayGameObject.transform.LookAt(m_Face.fixationPoint.position);
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}
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}
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}
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