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Updated ViewTransform

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ClemensFischer 2026-01-05 21:27:00 +01:00
parent 9e1c72fda9
commit 03e0258f18
8 changed files with 49 additions and 80 deletions
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102
MapControl/WinUI/Matrix.WinUI.cs
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@ -1,102 +0,0 @@
using System;
#if UWP
using WindowsUI = Windows.UI;
#else
using WindowsUI = Microsoft.UI;
#endif
namespace MapControl
{
/// <summary>
/// Replaces Windows.UI.Xaml.Media.Matrix for double floating point precision.
/// </summary>
public struct Matrix(double m11, double m12, double m21, double m22, double offsetX, double offsetY)
{
public double M11 { get; private set; } = m11;
public double M12 { get; private set; } = m12;
public double M21 { get; private set; } = m21;
public double M22 { get; private set; } = m22;
public double OffsetX { get; private set; } = offsetX;
public double OffsetY { get; private set; } = offsetY;
public static implicit operator WindowsUI.Xaml.Media.Matrix(Matrix m)
{
return new WindowsUI.Xaml.Media.Matrix(m.M11, m.M12, m.M21, m.M22, m.OffsetX, m.OffsetY);
}
public static implicit operator Matrix(WindowsUI.Xaml.Media.Matrix m)
{
return new Matrix(m.M11, m.M12, m.M21, m.M22, m.OffsetX, m.OffsetY);
}
public readonly Point Transform(Point p)
{
return new Point(
M11 * p.X + M21 * p.Y + OffsetX,
M12 * p.X + M22 * p.Y + OffsetY);
}
public void Translate(double x, double y)
{
OffsetX += x;
OffsetY += y;
}
public void Rotate(double angle)
{
angle = (angle % 360d) / 180d * Math.PI;
if (angle != 0d)
{
var cos = Math.Cos(angle);
var sin = Math.Sin(angle);
// Multiply(new Matrix(cos, sin, -sin, cos, 0d, 0d));
SetMatrix(
cos * M11 - sin * M12,
sin * M11 + cos * M12,
cos * M21 - sin * M22,
sin * M21 + cos * M22,
cos * OffsetX - sin * OffsetY,
sin * OffsetX + cos * OffsetY);
}
}
public void Invert()
{
var invDet = 1d / (M11 * M22 - M12 * M21);
if (double.IsInfinity(invDet))
{
throw new InvalidOperationException("Matrix is not invertible.");
}
SetMatrix(
invDet * M22, invDet * -M12, invDet * -M21, invDet * M11,
invDet * (M21 * OffsetY - M22 * OffsetX),
invDet * (M12 * OffsetX - M11 * OffsetY));
}
public void Multiply(Matrix m)
{
SetMatrix(
M11 * m.M11 + M12 * m.M21,
M11 * m.M12 + M12 * m.M22,
M21 * m.M11 + M22 * m.M21,
M21 * m.M12 + M22 * m.M22,
OffsetX * m.M11 + OffsetY * m.M21 + m.OffsetX,
OffsetX * m.M12 + OffsetY * m.M22 + m.OffsetY);
}
private void SetMatrix(double m11, double m12, double m21, double m22, double offsetX, double offsetY)
{
M11 = m11;
M12 = m12;
M21 = m21;
M22 = m22;
OffsetX = offsetX;
OffsetY = offsetY;
}
}
}