How Can i get ARPlane Coordinate

Hi. I want to draw line on AR World's Floor. So first, I use AR raycast and draw the floor. I Check the floor area is fill the Plane's Mesh. And I make a Cube that touch on plane mesh area. So I think floor's area is similar real world's floor. But I can not get the floor's Coordinate. How can i get the mesh area's Coordinate?

Here is a Code when i make a cube when touch on mesh area and app's screenshot.

using System.Collections;

using System.Collections.Generic;

using UnityEngine;

using UnityEngine.XR.ARFoundation;



public class FloorEvent : MonoBehaviour

{

    public GameObject prefabToPlace;

    public ARRaycastManager aRSessionOrigin;

    public List<ARRaycastHit> hits;



    void Start()

    {

        hits = new List<ARRaycastHit>();

        aRSessionOrigin = GetComponent<ARRaycastManager>();

    }



    void Update()

    {

        if (Input.touchCount > 0)

        {

            for (int i=0; i < Input.touchCount; i++)

            {

                Touch touch = Input.GetTouch(i);

                if (touch.phase == TouchPhase.Began)

                {

                    if (aRSessionOrigin.Raycast(touch.position, hits))

                    {

                        Pose hitPose = hits[0].pose;

                        Instantiate(prefabToPlace, hitPose.position, hitPose.rotation);

                        Debug.Log("1 : "+hitPose.position);

                    }

                }

            }

        }



    }

}

 

Hello YSK1015, I am pretty new to ARFoundation myself but I have worked on a similar project before.
If I understand this correctly, you want the prefabToPlace to be on top of the plane created and not intersecting like it shows in the screenshot?

If that is the case, I suggest looking at the origin of the prefabToPlace and ensure that set at the bottom. You can check this by placing it on a plane in the Editor( with transform positions set to (0,0,0)).

Hope that helps!