# Matrix.RotateAt(Double, Double, Double) Method

## Definition

Rotates this matrix about the specified point.

``````public:
void RotateAt(double angle, double centerX, double centerY);``````
``public void RotateAt (double angle, double centerX, double centerY);``
``member this.RotateAt : double * double * double -> unit``
``Public Sub RotateAt (angle As Double, centerX As Double, centerY As Double)``

#### Parameters

angle
Double

The angle, in degrees, by which to rotate this matrix.

centerX
Double

The x-coordinate of the point about which to rotate this matrix.

centerY
Double

The y-coordinate of the point about which to rotate this matrix.

## Examples

The following example shows how to rotate a Matrix about a specified point.

``````private Matrix rotateAboutPointExample()
{

// Creating a Matrix structure.
Matrix myMatrix = new Matrix(5, 10, 15, 20, 25, 30);

// Rotate the matrix 90 degrees about the point (100,100).
// myMatrix becomes equal to (-10, 4, -20, 15, 170, 25).
myMatrix.RotateAt(90, 100, 100);

return myMatrix;
}
``````