ClemensFischer/XAML-Map-Control
1
0
Fork 0
mirror of https://github.com/ClemensFischer/XAML-Map-Control.git synced 2026-04-08 16:05:50 +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

26
MapControl/Shared/WmtsTileMatrixLayer.cs
View file

@ -3,8 +3,6 @@
// Licensed under the Microsoft Public License (Ms-PL)
using System;
using System.Collections.Generic;
using System.Linq;
#if WINUI
using Windows.Foundation;
using Microsoft.UI.Xaml.Controls;
@ -39,7 +37,7 @@ namespace MapControl
public int XMax { get; private set; }
public int YMax { get; private set; }
public IReadOnlyCollection<Tile> Tiles { get; private set; } = new List<Tile>();
public TileCollection Tiles { get; private set; } = new TileCollection();
public void SetRenderTransform(ViewTransform viewTransform)
{
@ -57,16 +55,26 @@ namespace MapControl
//
var bounds = viewTransform.GetTileMatrixBounds(TileMatrix.Scale, TileMatrix.TopLeft, viewSize);
// tile column and row index bounds
// tile X and Y bounds
//
var xMin = (int)Math.Floor(bounds.X / TileMatrix.TileWidth);
var yMin = (int)Math.Floor(bounds.Y / TileMatrix.TileHeight);
var xMax = (int)Math.Floor((bounds.X + bounds.Width) / TileMatrix.TileWidth);
var yMax = (int)Math.Floor((bounds.Y + bounds.Height) / TileMatrix.TileHeight);
xMin = Math.Max(xMin, 0);
// total tile matrix width in meters
//
var totalWidth = TileMatrix.MatrixWidth * TileMatrix.TileWidth / TileMatrix.Scale;
if (Math.Abs(totalWidth - 360d * MapProjection.Wgs84MeterPerDegree) > 1d)
{
// no full longitudinal coverage, restrict x index
//
xMin = Math.Max(xMin, 0);
xMax = Math.Min(Math.Max(xMax, 0), TileMatrix.MatrixWidth - 1);
}
yMin = Math.Max(yMin, 0);
xMax = Math.Min(Math.Max(xMax, 0), TileMatrix.MatrixWidth - 1);
yMax = Math.Min(Math.Max(yMax, 0), TileMatrix.MatrixHeight - 1);
if (XMin == xMin && YMin == yMin && XMax == xMax && YMax == yMax)
@ -84,17 +92,17 @@ namespace MapControl
public void UpdateTiles()
{
var newTiles = new List<Tile>();
var tiles = new TileCollection();
for (var y = YMin; y <= YMax; y++)
{
for (var x = XMin; x <= XMax; x++)
{
newTiles.Add(Tiles.FirstOrDefault(t => t.X == x && t.Y == y) ?? new Tile(ZoomLevel, x, y));
tiles.Add(Tiles.GetTile(ZoomLevel, x, y, TileMatrix.MatrixWidth));
}
}
Tiles = newTiles;
Tiles = tiles;
Children.Clear();