ClemensFischer/XAML-Map-Control
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MapPanel longitude coercion

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ClemensFischer 2024-08-29 21:35:58 +02:00
parent 94c3faf805
commit 4b0a0d29fd
9 changed files with 110 additions and 189 deletions
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64
MapControl/Shared/ViewTransform.cs
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@ -2,7 +2,6 @@
// Copyright © 2024 Clemens Fischer
// Licensed under the Microsoft Public License (Ms-PL)
using System;
#if WPF
using System.Windows;
using System.Windows.Media;
@ -18,18 +17,8 @@ namespace MapControl
/// Defines the transformation between projected map coordinates in meters
/// and view coordinates in pixels.
/// </summary>
public class ViewTransform
public partial class ViewTransform
{
public static double ZoomLevelToScale(double zoomLevel)
{
return 256d * Math.Pow(2d, zoomLevel) / (360d * MapProjection.Wgs84MeterPerDegree);
}
public static double ScaleToZoomLevel(double scale)
{
return Math.Log(scale * 360d * MapProjection.Wgs84MeterPerDegree / 256d, 2d);
}
/// <summary>
/// Gets the scaling factor from projected map coordinates to view coordinates,
/// as pixels per meter.
@ -51,6 +40,32 @@ namespace MapControl
/// </summary>
public Matrix ViewToMapMatrix { get; private set; }
/// <summary>
/// Transforms a Point from projected map coordinates to view coordinates.
/// </summary>
public Point MapToView(Point point)
{
return MapToViewMatrix.Transform(point);
}
/// <summary>
/// Transforms a Point from view coordinates to projected map coordinates.
/// </summary>
public Point ViewToMap(Point point)
{
return ViewToMapMatrix.Transform(point);
}
/// <summary>
/// Transform relative to absolute map scale. Returns horizontal and vertical
/// scaling factors from meters to view coordinates.
/// </summary>
public Point GetMapScale(Point relativeScale)
{
return new Point(Scale * relativeScale.X, Scale * relativeScale.Y);
}
#if WPF || UWP || WINUI
/// <summary>
/// Initializes a ViewTransform from a map center point in projected coordinates,
/// a view conter point, a scaling factor from projected coordinates to view coordinates
@ -72,30 +87,6 @@ namespace MapControl
ViewToMapMatrix = transform;
}
/// <summary>
/// Transforms a Point from projected map coordinates to view coordinates.
/// </summary>
public Point MapToView(Point point)
{
return MapToViewMatrix.Transform(point);
}
/// <summary>
/// Transforms a Point from view coordinates to projected map coordinates.
/// </summary>
public Point ViewToMap(Point point)
{
return ViewToMapMatrix.Transform(point);
}
/// <summary>
/// Gets scaling factors from meters to view coordinates for a relative map scale.
/// </summary>
public Point GetMapScale(Point relativeScale)
{
return new Point(Scale * relativeScale.X, Scale * relativeScale.Y);
}
/// <summary>
/// Gets a transform Matrix from meters to view coordinates for a relative map scale.
/// </summary>
@ -170,5 +161,6 @@ namespace MapControl
return transform;
}
#endif
}
}