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Matrix.Identity Property

  • Reference

Definition

Namespace:
System.Windows.Media
Assembly:
WindowsBase.dll

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

See also