Matrix Transforms: Rotation at
<Window x:Class="WpfApplication1.MatrixTransforms"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Matrix Transforms" Height="450" Width="270">
<StackPanel>
<TextBlock Margin="10,10,5,5" Text="Original Matrix:" />
<TextBlock Name="tbOriginal" Margin="20,0,5,5" />
<TextBlock Margin="10,0,5,5" Text="RotationAt:" />
<TextBlock x:Name="tbRotateAt" Margin="20,0,5,5" TextWrapping="Wrap" />
</StackPanel>
</Window>
//File:Window.xaml.vb
Imports System
Imports System.Windows
Imports System.Windows.Media
Namespace WpfApplication1
Public Partial Class MatrixTransforms
Inherits Window
Public Sub New()
InitializeComponent()
' Original matrix:
Dim m As New Matrix(1, 2, 3, 4, 0, 1)
tbOriginal.Text = "(" & m.ToString() & ")"
'Rotation at (x = 1, y = 2):
m = New Matrix(1, 2, 3, 4, 0, 1)
m.RotateAt(45, 1, 2)
tbRotateAt.Text = "(" & MatrixRound(m).ToString() & ")"
End Sub
Private Function MatrixRound(m As Matrix) As Matrix
m.M11 = Math.Round(m.M11, 3)
m.M12 = Math.Round(m.M12, 3)
m.M21 = Math.Round(m.M21, 3)
m.M22 = Math.Round(m.M22, 3)
m.OffsetX = Math.Round(m.OffsetX, 3)
m.OffsetY = Math.Round(m.OffsetY, 3)
Return m
End Function
End Class
End Namespace
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