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Improved MapProjections

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ClemensF 2019-10-25 19:56:23 +02:00
parent 82470435c7
commit 716cf950f3
6 changed files with 66 additions and 52 deletions
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13
MapControl/Shared/MapProjection.cs
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@ -5,7 +5,6 @@
using System;
#if WINDOWS_UWP
using Windows.Foundation;
using Windows.UI.Xaml.Media;
#else
using System.Windows;
using System.Windows.Media;
@ -134,9 +133,17 @@ namespace MapControl
/// </summary>
public BoundingBox ViewportRectToBoundingBox(Rect rect)
{
var transform = new MatrixTransform { Matrix = InverseViewportTransform };
var p1 = InverseViewportTransform.Transform(new Point(rect.X, rect.Y));
var p2 = InverseViewportTransform.Transform(new Point(rect.X, rect.Y + rect.Height));
var p3 = InverseViewportTransform.Transform(new Point(rect.X + rect.Width, rect.Y));
var p4 = InverseViewportTransform.Transform(new Point(rect.X + rect.Width, rect.Y + rect.Height));
return RectToBoundingBox(transform.TransformBounds(rect));
rect.X = Math.Min(p1.X, Math.Min(p2.X, Math.Min(p3.X, p4.X)));
rect.Y = Math.Min(p1.Y, Math.Min(p2.Y, Math.Min(p3.Y, p4.Y)));
rect.Width = Math.Max(p1.X, Math.Max(p2.X, Math.Max(p3.X, p4.X))) - rect.X;
rect.Height = Math.Max(p1.Y, Math.Max(p2.Y, Math.Max(p3.Y, p4.Y))) - rect.Y;
return RectToBoundingBox(rect);
}
/// <summary>