ClemensFischer/XAML-Map-Control
1
0
Fork 0
mirror of https://github.com/ClemensFischer/XAML-Map-Control.git synced 2026-04-07 23:45:05 +00:00
Code Issues Projects Releases Packages Wiki Activity

WMTS tile handling

Browse source
This commit is contained in:
ClemensFischer 2022-11-22 19:15:34 +01:00
parent 6d359a5a91
commit 0e27e95c6f
11 changed files with 100 additions and 71 deletions
Download patch file Download diff file Expand all files Collapse all files

34
MapControl/Shared/MapTileLayer.cs
View file

@ -3,8 +3,6 @@
// Licensed under the Microsoft Public License (Ms-PL)
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
#if WINUI
using Windows.Foundation;
@ -62,7 +60,7 @@ namespace MapControl
public TileMatrix TileMatrix { get; private set; }
public IReadOnlyCollection<Tile> Tiles { get; private set; } = new List<Tile>();
public TileCollection Tiles { get; private set; } = new TileCollection();
/// <summary>
/// Minimum zoom level supported by the MapTileLayer. Default value is 0.
@ -110,6 +108,8 @@ namespace MapControl
{
foreach (var tile in Tiles)
{
// arrange tiles relative to XMin/YMin
//
var tileSize = TileSize << (TileMatrix.ZoomLevel - tile.ZoomLevel);
var x = tileSize * tile.X - TileSize * TileMatrix.XMin;
var y = tileSize * tile.Y - TileSize * TileMatrix.YMin;
@ -138,7 +138,7 @@ namespace MapControl
{
if (Tiles.Count > 0)
{
Tiles = new List<Tile>(); // clear all
Tiles = new TileCollection(); // clear all
}
update = true;
}
@ -182,7 +182,7 @@ namespace MapControl
//
var bounds = ParentMap.ViewTransform.GetTileMatrixBounds(tileMatrixScale, MapTopLeft, ParentMap.RenderSize);
// tile column and row index bounds
// tile X and Y bounds
//
var xMin = (int)Math.Floor(bounds.X / TileSize);
var yMin = (int)Math.Floor(bounds.Y / TileSize);
@ -204,7 +204,7 @@ namespace MapControl
private void UpdateTiles()
{
var tiles = new List<Tile>();
var tiles = new TileCollection();
if (TileSource != null && TileMatrix != null)
{
@ -218,32 +218,18 @@ namespace MapControl
for (var z = minZoomLevel; z <= maxZoomLevel; z++)
{
var numTiles = 1 << z;
var tileSize = 1 << (TileMatrix.ZoomLevel - z);
var x1 = (int)Math.Floor((double)TileMatrix.XMin / tileSize); // may be negative
var x2 = TileMatrix.XMax / tileSize;
var x2 = TileMatrix.XMax / tileSize; // may be greater than numTiles-1
var y1 = Math.Max(TileMatrix.YMin / tileSize, 0);
var y2 = Math.Min(TileMatrix.YMax / tileSize, (1 << z) - 1);
var y2 = Math.Min(TileMatrix.YMax / tileSize, numTiles - 1);
for (var y = y1; y <= y2; y++)
{
for (var x = x1; x <= x2; x++)
{
var tile = Tiles.FirstOrDefault(t => t.ZoomLevel == z && t.Y == y && t.X == x);
if (tile == null)
{
tile = new Tile(z, x, y);
var equivalentTile = Tiles.FirstOrDefault(
t => t.IsLoaded && t.ZoomLevel == z && t.Y == y && t.XIndex == tile.XIndex);
if (equivalentTile != null)
{
tile.SetImageSource(equivalentTile.Image.Source, false);
}
}
tiles.Add(tile);
tiles.Add(Tiles.GetTile(z, x, y, numTiles));
}
}
}