在arcore中绘制直线而不是渲染锚点

using UnityEngine;
using UnityEngine.XR.ARFoundation;
using UnityEngine.XR.ARSubsystems;

public class DrawLine : MonoBehaviour
{
    public ARRaycastManager raycastManager;
    public ARLineRenderer lineRenderer;

    void Update()
    {
        if (Input.touchCount > 0)
        {
            Touch touch = Input.GetTouch(0);
            if (touch.phase == TouchPhase.Began)
            {
                List<ARRaycastHit> hits = new List<ARRaycastHit>();
                if (raycastManager.Raycast(touch.position, hits, TrackableType.PlaneWithinPolygon))
                {
                    lineRenderer.SetPosition(0, hits[0].pose.position);
                }
            }
            else if (touch.phase == TouchPhase.Moved)
            {
                List<ARRaycastHit> hits = new List<ARRaycastHit>();
                if (raycastManager.Raycast(touch.position, hits, TrackableType.PlaneWithinPolygon))
                {
                    lineRenderer.SetPosition(1, hits[0].pose.position);
                }
            }
        }
    }
}