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

Use Matrix for projection relative scale

Browse source
This commit is contained in:
ClemensFischer 2026-01-20 09:48:16 +01:00
parent 2c9e478095
commit ab155a26e7
21 changed files with 93 additions and 104 deletions
Download patch file Download diff file Expand all files Collapse all files

32
MapControl/Shared/MapBase.cs
View file

@ -177,37 +177,25 @@ namespace MapControl
public ViewTransform ViewTransform { get; } = new ViewTransform();
/// <summary>
/// Gets the map scale as horizontal and vertical scaling factors from meters to
/// view coordinates at the specified geographic coordinates.
/// Gets a transform Matrix from meters to view coordinates for scaling and rotating
/// at the specified geographic coordinates.
/// </summary>
public Point GetMapScale(double latitude, double longitude)
public Matrix GetMapToViewTransform(double latitude, double longitude)
{
var relativeScale = MapProjection.RelativeScale(latitude, longitude);
var transform = MapProjection.RelativeScale(latitude, longitude);
transform.Scale(ViewTransform.Scale, ViewTransform.Scale);
transform.Rotate(ViewTransform.Rotation);
return new Point(ViewTransform.Scale * relativeScale.X, ViewTransform.Scale * relativeScale.Y);
}
/// <summary>
/// Gets the map scale as horizontal and vertical scaling factors from meters to
/// view coordinates at the specified location.
/// </summary>
public Point GetMapScale(Location location)
{
return GetMapScale(location.Latitude, location.Longitude);
return transform;
}
/// <summary>
/// Gets a transform Matrix from meters to view coordinates for scaling and rotating
/// objects that are anchored at the specified Location.
/// at the specified Location.
/// </summary>
public Matrix GetMapTransform(Location location)
public Matrix GetMapToViewTransform(Location location)
{
var mapScale = GetMapScale(location.Latitude, location.Longitude);
var transform = new Matrix(mapScale.X, 0d, 0d, mapScale.Y, 0d, 0d);
transform.Rotate(ViewTransform.Rotation);
return transform;
return GetMapToViewTransform(location.Latitude, location.Longitude);
}
/// <summary>