/* INFINITY CODE */
/* https://infinity-code.com */
using System;
using UnityEngine;
namespace InfinityCode.OnlineMapsExamples
{
/// <summary>
/// Example how to draw a circle around a marker
/// </summary>
[AddComponentMenu("Infinity Code/Online Maps/Examples (API Usage)/DrawCircleAroundMarker")]
public class DrawCircleAroundMarker : MonoBehaviour
{
/// <summary>
/// Reference to the map. If not specified, the current instance will be used.
/// </summary>
public OnlineMaps map;
/// <summary>
/// Radius of the circle
/// </summary>
public float radiusKM = 0.1f;
/// <summary>
/// Number of segments
/// </summary>
public int segments = 32;
/// <summary>
/// This method is called when the script starts
/// </summary>
private void Start()
{
// If map is not specified, use the current instance.
if (map == null) map = OnlineMaps.instance;
// Subscribe to click on map event
map.control.OnMapClick += OnMapClick;
}
/// <summary>
/// This method is called when a user clicks on a map
/// </summary>
private void OnMapClick()
{
// Get the coordinates under cursor
double lng, lat;
OnlineMapsControlBase control = map.control;
control.GetCoords(out lng, out lat);
// Create a new marker under cursor
control.markerManager.Create(lng, lat, "Marker " + control.markerManager.Count);
// Get the coordinate at the desired distance
double nlng, nlat;
OnlineMapsUtils.GetCoordinateInDistance(lng, lat, radiusKM, 90, out nlng, out nlat);
double tx1, ty1, tx2, ty2;
// Convert the coordinate under cursor to tile position
map.projection.CoordinatesToTile(lng, lat, 20, out tx1, out ty1);
// Convert remote coordinate to tile position
map.projection.CoordinatesToTile(nlng, nlat, 20, out tx2, out ty2);
// Calculate radius in tiles
double r = tx2 - tx1;
// Create a new array for points
OnlineMapsVector2d[] points = new OnlineMapsVector2d[segments];
// Calculate a step
double step = 360d / segments;
// Calculate each point of circle
for (int i = 0; i < segments; i++)
{
double px = tx1 + Math.Cos(step * i * OnlineMapsUtils.Deg2Rad) * r;
double py = ty1 + Math.Sin(step * i * OnlineMapsUtils.Deg2Rad) * r;
map.projection.TileToCoordinates(px, py, 20, out lng, out lat);
points[i] = new OnlineMapsVector2d(lng, lat);
}
// Create a new polygon to draw a circle
OnlineMapsDrawingPoly poly = new OnlineMapsDrawingPoly(points, Color.red, 3);
control.drawingElementManager.Add(poly);
}
}
}