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

public class CameraManager : MonoBehaviour
{
    public Transform cam;
    public float sensitivity;
    
    void Start()
    {
        
    }

    void Update()
    {
        
    }
    
    private Vector2 mouseStartPos = Vector2.zero;
    private Vector3 cameraStartPos = Vector2.zero;
    public bool moving = false;
    public void OnMouseDown(BaseEventData e){
        PointerEventData ped = (PointerEventData) e as PointerEventData;
        mouseStartPos = ped.position;
        cameraStartPos = cam.transform.position;
        moving=true;
    }
    public void OnMouseUp(BaseEventData e){
        PointerEventData ped = (PointerEventData) e as PointerEventData;
        moving=false;
    }
    public void OnMouseMove(BaseEventData e){
        PointerEventData ped = (PointerEventData) e as PointerEventData;
        if(moving && !Selector.isMovingBuilding){
            Vector3 offset = (mouseStartPos-ped.position) * sensitivity;
            cam.transform.position = cameraStartPos + new Vector3(offset.x,0,offset.y);
        }
    }

    
}