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MapProjection.RelativeTransform

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ClemensFischer 2026-01-27 22:56:09 +01:00
parent a0e82964ef
commit 8d25310b8e
19 changed files with 59 additions and 50 deletions
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20
MapControl/Shared/Matrix.cs
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@ -52,8 +52,6 @@ namespace MapControl
public void Scale(double scaleX, double scaleY)
{
// equivalent to Multiply(new Matrix(scaleX, 0, 0, scaleY, 0d, 0d));
//
SetMatrix(
M11 * scaleX,
M12 * scaleY,
@ -72,8 +70,6 @@ namespace MapControl
var cos = Math.Cos(angle);
var sin = Math.Sin(angle);
// equivalent to Multiply(new Matrix(cos, sin, -sin, cos, 0d, 0d));
//
SetMatrix(
M11 * cos - M12 * sin,
M11 * sin + M12 * cos,
@ -99,15 +95,15 @@ namespace MapControl
invDet * (M12 * OffsetX - M11 * OffsetY));
}
public void Multiply(Matrix m)
public static Matrix Multiply(Matrix m1, Matrix m2)
{
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);
return new Matrix(
m1.M11 * m2.M11 + m1.M12 * m2.M21,
m1.M11 * m2.M12 + m1.M12 * m2.M22,
m1.M21 * m2.M11 + m1.M22 * m2.M21,
m1.M21 * m2.M12 + m1.M22 * m2.M22,
m1.OffsetX * m2.M11 + m1.OffsetY * m2.M21 + m2.OffsetX,
m1.OffsetX * m2.M12 + m1.OffsetY * m2.M22 + m2.OffsetY);
}
private void SetMatrix(double m11, double m12, double m21, double m22, double offsetX, double offsetY)