[TASK] Initial commit with basic product setup

Assets/Mapbox SDK/Mapbox/Unity/Map/TileProviders/QuadTreeMapVisualizer.cs

@@ -0,0 +1,39 @@
+using Mapbox.Map;
+using Mapbox.Unity.Map.Interfaces;
+using Mapbox.Unity.MeshGeneration.Data;
+using Mapbox.Unity.Utilities;
+using Mapbox.Utils;
+using UnityEngine;
+
+namespace Mapbox.Unity.Map.TileProviders
+{
+	//TODO : obsolete.
+	[CreateAssetMenu(menuName = "Mapbox/MapVisualizer/QuadTreeMapVisualizer")]
+	public class QuadTreeMapVisualizer : AbstractMapVisualizer
+	{
+		protected override void PlaceTile(UnwrappedTileId tileId, UnityTile tile, IMapReadable map)
+		{
+			//get the tile covering the center (Unity 0,0,0) of current extent
+			UnwrappedTileId centerTile = TileCover.CoordinateToTileId(map.CenterLatitudeLongitude, map.AbsoluteZoom);
+			//get center WebMerc corrdinates of tile covering the center (Unity 0,0,0)
+			Vector2d centerTileCenter = Conversions.TileIdToCenterWebMercator(centerTile.X, centerTile.Y, map.AbsoluteZoom);
+			//calculate distance between WebMerc center coordinates of center tile and WebMerc coordinates exactly at center
+			Vector2d shift = map.CenterMercator - centerTileCenter;
+			var unityTileSize = map.UnityTileSize;
+			// get factor at equator to avoid shifting errors at higher latitudes
+			float factor = Conversions.GetTileScaleInMeters(0f, map.AbsoluteZoom) * 256.0f / unityTileSize;
+			var scaleFactor = Mathf.Pow(2, (map.InitialZoom - map.AbsoluteZoom));
+
+			//position the tile relative to the center tile of the current viewport using the tile id
+			//multiply by tile size Unity units (unityTileScale)
+			//shift by distance of current viewport center to center of center tile
+			float shiftX = (float)shift.x / factor;
+			float shiftY = (float)shift.y / factor;
+			Vector3 position = new Vector3(
+				((tileId.X - centerTile.X) * unityTileSize - shiftX) * scaleFactor
+				, 0
+				, ((centerTile.Y - tileId.Y) * unityTileSize - shiftY) * scaleFactor);
+			tile.transform.localPosition = position;
+		}
+	}
+}