Matrix.Identity Property

Reference

Definition

Namespace:: System.Windows.Media

Assembly:: WindowsBase.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Gets an identity Matrix.

public:
 static property System::Windows::Media::Matrix Identity { System::Windows::Media::Matrix get(); };

public static System.Windows.Media.Matrix Identity { get; }

static member Identity : System.Windows.Media.Matrix

Public Shared ReadOnly Property Identity As Matrix

Property Value

Matrix

An identity matrix.

Examples

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;
}

Remarks

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.

Applies to

Jaa