Matrix.SetIdentity Method

public:
 void SetIdentity();

public void SetIdentity ();

member this.SetIdentity : unit -> unit

Public Sub SetIdentity ()

Examples

The following example shows how to turn a Matrix structure into an 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.

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

Applies to

See also

• Identity
• IsIdentity