using System;
using UnityEngine;
using UnityEngine.UI;

namespace GISTech.GISTerrainLoader
{
	public class DistanceCalculation : MonoBehaviour
	{
		public AirplaneDemo Airplane;

		private SimpleTerrainGenerator MyTerrainGenerator;

		public Text UIDistance;

		private void Start()
		{
			MyTerrainGenerator = GetComponent<SimpleTerrainGenerator>();
		}

		private void Update()
		{
			if (!(Airplane == null) && !(MyTerrainGenerator == null) && MyTerrainGenerator.TerrainGenerated)
			{
				DVector2 p = Airplane.GetAirPlaneLatLonElevation().ToDVector2();
				DVector2 wayPointLatLon = Airplane.GetWayPointLatLon();
				double num = Math.Round(GISTerrainLoaderGeoConversion.CalDistance(p, wayPointLatLon), 2);
				if (num > 1.0)
				{
					UIDistance.text = "Distance to the next waypoint : " + num + " [Km]";
				}
				else
				{
					UIDistance.text = "Distance to the next waypoint : " + num * 1000.0 + " [m]";
				}
			}
		}
	}
}