Matrix.ScaleAt Method (Double, Double, Double, Double)

 

Scales this Matrix by the specified amount about the specified point.

Namespace:   System.Windows.Media
Assembly:  WindowsBase (in WindowsBase.dll)

public void ScaleAt(
	double scaleX,
	double scaleY,
	double centerX,
	double centerY
)

Parameters

scaleX
Type: System.Double

The amount by which to scale this Matrix along the x-axis.

scaleY
Type: System.Double

The amount by which to scale this Matrix along the y-axis.

centerX
Type: System.Double

The x-coordinate of the scale operation's center point.

centerY
Type: System.Double

The y-coordinate of the scale operation's center point.

The following example shows how to scale a Matrix structure.


private Matrix scaleExample()
{
    Matrix myMatrix = new Matrix(5, 10, 15, 20, 25, 30);

    // Scale myMatrix by a horizontal factor of 2
    // and a vertical factor of 4 about the origin.
    // After this operation,
    // myMatrix is equal to (10, 40, 30, 80, 50, 120)
    myMatrix.Scale(2, 4);

    return myMatrix;

}

private Matrix scaleAboutPointExample()
{
    Matrix myMatrix = new Matrix(5, 10, 15, 20, 25, 30);

    // Scale myMatrix by a horizontal factor of 2
    // and a vertical factor of 4 about the 
    // point (100,100).
    // After this operation,
    // myMatrix is equal to (10, 40, 30, 80, -50, -180)
    myMatrix.ScaleAt(2, 4, 100, 100);

    return myMatrix;

}        

.NET Framework
Available since 3.0
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