private Vector2 OnGetInputPosition()
    {
        return texCam.ViewportToScreenPoint(cursorPos);
    }

Debug.Log("Fake mouse clic at texture coord : "+cursorPos.ToString("f8")+" which is "+ OnlineMapsTileSetControl.instance.GetCoords(cursorPos).ToString("f8"));

double lng, lat;
OnlineMapsTileSetControl.instance.GetCoords(out lng, out lat, cursorPos);
Debug.Log("Fake mouse clic at texture coord : "+cursorPos.ToString("f8")+" which is "+ lng + "   " + lat);

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;

public class Test_VR_controller_UI_interaction : MonoBehaviour {


    public Text outputText;
    public Camera texCam;
    public GameObject prefab;

    LineRenderer LR;

    private Vector2 cursorPos = new Vector2();
    private bool isPointingTabletScreen = false;

    // Use this for initialization
    void Start () {
        
        LR = gameObject.AddComponent<LineRenderer>();
        LR.startWidth = 0.01f;
        LR.endWidth = 0.01f;
        LR.positionCount = 2;
        LR.material = new Material(Shader.Find("Particles/Alpha Blended Premultiply"));
        LR.startColor = Color.yellow;
        LR.endColor = Color.yellow;

        // Intercepts getting the cursor coordinates.
        OnlineMapsControlBase.instance.OnGetInputPosition += OnGetInputPosition;

        // Intercepts getting the number of touches.
        OnlineMapsControlBase.instance.OnGetTouchCount += OnGetTouchCount;

        OnlineMapsControlBase.instance.OnMapClick += OnMapClick;// Subscribe to the click event.
    }
    
    // Update is called once per frame
    void Update () {
        bool bDown = OVRInput.GetDown(OVRInput.Button.PrimaryIndexTrigger, OVRInput.Controller.RTouch); // for right hand

        LR.SetPosition(0, transform.position);

        RaycastHit hit;
        // Does the ray intersect any objects
        if (Physics.Raycast(transform.position, transform.TransformDirection(Vector3.forward), out hit, Mathf.Infinity))
        {
            LR.SetPosition(1, hit.point);
            LR.endColor = Color.red;

            //outputText.text = hit.transform.gameObject.name;
            outputText.text = hit.transform.gameObject.name + "  " + hit.textureCoord.ToString();
            //outputText.text = OnlineMapsTileSetControl.instance.GetCoords(hit.textureCoord).ToString("f8");

            if (bDown)
            {
                if (hit.transform.gameObject.name == "tablet_screen")
                {
                    cursorPos = hit.textureCoord;
                    isPointingTabletScreen = true;
                    return;
                }
            }
        }
        else
        {
            LR.SetPosition(1, transform.position + transform.TransformDirection(Vector3.forward) * 1000);
        }

        isPointingTabletScreen = false;
    }

    private Vector2 OnGetInputPosition()
    {
        return cursorPos;
    }

    private int OnGetTouchCount()
    {
        if (isPointingTabletScreen)
        {
            Debug.Log("Fake mouse clic at texture coord : "+cursorPos.ToString("f8")+" which is "+ OnlineMapsTileSetControl.instance.GetCoords(cursorPos).ToString("f8"));
            return 1;
        }
        else
            return 0;
    }
    
    private void OnMapClick()
    {
        double lng, lat;
        OnlineMapsControlBase.instance.GetCoords(out lng, out lat);
        Debug.Log("OnMapClick at " + lng + "   " + lat);

        OnlineMapsMarker3D marker = OnlineMapsControlBase3D.instance.AddMarker3D(lng, lat, prefab);
    }
}