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Matrix.Identity Property

Gets an identity Matrix.

Namespace:  System.Windows.Media
Assembly:  WindowsBase (in WindowsBase.dll)
public static Matrix Identity { get; }
You cannot set this property in XAML.

Property Value

Type: System.Windows.Media.Matrix
An identity matrix.

An identity matrix has a value of 1 in coefficients [1,1],[2,2],[3,3] and a value of 0 in the rest of the coefficients. This correlates to setting M11 and M22 to 1 and M12, M21, OffsetX, and OffsetY to 0. In an affine matrix, which is the implementation that Windows Presentation Foundation (WPF) uses for the Matrix, structure, coefficients [3,1],[3,2],[3.3] are implied to always have the values 0,0,1 respectively.

1

0

0

0

1

0

0

0

1

For an identity matrix, the ToString method returns the string "Identity" instead of the coefficients of the Matrix.

The following example shows how to retrieve the Identity matrix.

private Matrix identityExample()
{

    // Get the identity matrix, which is equal to  
    // (1,0,0,1,0,0). 
    Matrix myMatrix = Matrix.Identity;


    Matrix m = new Matrix(1,0,0,1,0,0);

    return myMatrix;


}

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0
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