您最多选择25个主题 主题必须以中文或者字母或数字开头,可以包含连字符 (-),并且长度不得超过35个字符

94 行
2.8 KiB

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.XR.ARFoundation;
using UnityEngine.XR.ARSubsystems;
/// <summary>
/// Visualizes the eye gaze position in face space for an <see cref="ARFace"/>.
/// </summary>
/// <remarks>
/// Face space is the space where the origin is the transform of an <see cref="ARFace"/>.
/// </remarks>
[RequireComponent(typeof(ARFace))]
public class FixationPoint2DVisualizer : MonoBehaviour
{
[SerializeField]
GameObject m_GUIFixationReticlePrefab;
public GameObject fixationReticlePrefab
{
get => m_GUIFixationReticlePrefab;
set => m_GUIFixationReticlePrefab = value;
}
GameObject m_FixationReticleGameObject;
Canvas m_Canvas;
ARFace m_Face;
XRFaceSubsystem m_FaceSubsystem;
void Awake()
{
m_Face = GetComponent<ARFace>();
}
void CreateEyeGameObjectsIfNecessary()
{
var canvas = FindObjectOfType<Canvas>();
if (m_Face.fixationPoint != null && canvas != null && m_FixationReticleGameObject == null)
{
m_FixationReticleGameObject = Instantiate(m_GUIFixationReticlePrefab, canvas.transform);
}
}
void SetVisible(bool visible)
{
if (m_FixationReticleGameObject != null)
m_FixationReticleGameObject.SetActive(visible);
}
void OnEnable()
{
var faceManager = FindObjectOfType<ARFaceManager>();
if (faceManager != null && faceManager.subsystem != null && faceManager.descriptor.supportsEyeTracking)
{
m_FaceSubsystem = (XRFaceSubsystem)faceManager.subsystem;
SetVisible((m_Face.trackingState == TrackingState.Tracking) && (ARSession.state > ARSessionState.Ready));
m_Face.updated += OnUpdated;
}
else
{
enabled = false;
}
}
void OnDisable()
{
m_Face.updated -= OnUpdated;
SetVisible(false);
}
void OnUpdated(ARFaceUpdatedEventArgs eventArgs)
{
CreateEyeGameObjectsIfNecessary();
SetVisible((m_Face.trackingState == TrackingState.Tracking) && (ARSession.state > ARSessionState.Ready));
UpdateScreenReticle();
}
void UpdateScreenReticle()
{
var mainCamera = Camera.main;
var fixationInViewSpace = mainCamera.WorldToViewportPoint(m_Face.fixationPoint.position);
// The camera texture is mirrored so x and y must be changed to match where the fixation point is in relation to the face.
var mirrorFixationInView = new Vector3(1 - fixationInViewSpace.x, 1 - fixationInViewSpace.y, fixationInViewSpace.z);
if (m_FixationReticleGameObject != null)
{
m_FixationReticleGameObject.GetComponent<RectTransform>().anchoredPosition3D = mainCamera.ViewportToScreenPoint(mirrorFixationInView);
}
}
}