using System;
using UnityEngine;

public class UpdateZoomOnSmoothZoomProcessExample:MonoBehaviour
{
    private Vector3 originalPosition;

    private void Start()
    {
        OnlineMapsTileSetControl.instance.OnSmoothZoomBegin += OnSmoothZoomBegin;
        OnlineMapsTileSetControl.instance.OnSmoothZoomProcess += OnSmoothZoomProcess;
    }

    private void OnSmoothZoomBegin()
    {
        originalPosition = OnlineMapsTileSetControl.instance.transform.position;
    }

    private void OnSmoothZoomProcess()
    {
        Transform t = OnlineMapsTileSetControl.instance.transform;

        Vector2 p1 = Input.GetTouch(0).position;
        Vector2 p2 = Input.GetTouch(1).position;

        Vector2 zoomPoint = Vector2.Lerp(p1, p2, 0.5f);

        while (t.localScale.x > 2 || t.localScale.x < 0.5)
        {
            if (t.localScale.x > 2)
            {
                OnlineMapsControlBase.instance.ZoomOnPoint(1, zoomPoint);
                t.position = (t.position - originalPosition) / 2 + originalPosition;
                t.localScale /= 2;
            }
            else if (t.localScale.x < 0.5)
            {
                OnlineMapsControlBase.instance.ZoomOnPoint(-1, zoomPoint);
                t.position = (originalPosition - t.position) * 2 + t.position;
                t.localScale *= 2;
            }
        }
        
    }
}