Matrix.Scale Method (Single, Single, MatrixOrder)

 

Applies the specified scale vector (scaleX and scaleY) to this Matrix using the specified order.

Namespace:   System.Drawing.Drawing2D
Assembly:  System.Drawing (in System.Drawing.dll)

public void Scale(
	float scaleX,
	float scaleY,
	MatrixOrder order
)

Parameters

scaleX
Type: System.Single

The value by which to scale this Matrix in the x-axis direction.

scaleY
Type: System.Single

The value by which to scale this Matrix in the y-axis direction.

order
Type: System.Drawing.Drawing2D.MatrixOrder

A MatrixOrder that specifies the order (append or prepend) in which the scale vector is applied to this Matrix.

The following code example is designed for use with Windows Forms, and it requires PaintEventArgse, an Paint event object. The code performs the following actions:

  • Draws a rectangle to the screen prior to applying a scaling transform (the blue rectangle).

  • Creates a matrix and scales it by 3 in the x-axis and 2 in the y-axis.

  • Applies this matrix transform to the rectangle.

  • Draws the transformed rectangle to the screen (the red rectangle).

Notice that the red rectangle has been scaled by a factor of 3 in the x-axis and by 2 in the y-axis, including the upper left-hand corner of the rectangle (the beginning point of the rectangle).

public void ScaleExample(PaintEventArgs e)
{
    Pen myPen = new Pen(Color.Blue, 1);
    Pen myPen2 = new Pen(Color.Red, 1);

    // Draw the rectangle to the screen before applying the
    // transform.
    e.Graphics.DrawRectangle(myPen, 50, 50, 100, 100);

    // Create a matrix and scale it.
    Matrix myMatrix = new Matrix();
    myMatrix.Scale(3, 2, MatrixOrder.Append);

    // Draw the rectangle to the screen again after applying the
    // transform.
    e.Graphics.Transform = myMatrix;
    e.Graphics.DrawRectangle(myPen2, 50, 50, 100, 100);
}

.NET Framework
Available since 1.1
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