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Graphics.MultiplyTransform Method (Matrix)

Multiplies the world transformation of this Graphics and specified the Matrix.

Namespace: System.Drawing
Assembly: System.Drawing (in system.drawing.dll)

public void MultiplyTransform (
	Matrix matrix
)
public void MultiplyTransform (
	Matrix matrix
)
public function MultiplyTransform (
	matrix : Matrix
)
Not applicable.

Parameters

matrix

4x4 Matrix that multiplies the world transformation.

This method prepends the matrix specified by the matrix parameter, so that the result is matrix x world transformation.

The following code example is designed for use with Windows Forms, and it requires PaintEventArgse, which is a parameter of the Paint event handler. The code performs the following actions:

  • Creates a transformMatrix matrix (a two by two identity matrix plus a zero-translation vector).

  • Translates the transform matrix by a vector (200, 100).

  • Rotates the world transformation matrix of the Windows Form by 30 degrees, prepends the rotation matrix for 30 degrees to the form's transformation matrix.

  • Multiplies the rotated world transformation matrix by the translated transformMatrix, and prepends the transformMatrix to the world transformation matrix.

  • Draws a rotated, translated ellipse.

private void MultiplyTransformMatrix(PaintEventArgs e)
{

    // Create transform matrix.
    Matrix transformMatrix = new Matrix();

    // Translate matrix, prepending translation vector.
    transformMatrix.Translate(200.0F, 100.0F);

    // Rotate transformation matrix of graphics object,

    // prepending rotation matrix.
    e.Graphics.RotateTransform(30.0F);

    // Multiply (prepend to) transformation matrix of

    // graphics object to translate graphics transformation.
    e.Graphics.MultiplyTransform(transformMatrix);

    // Draw rotated, translated ellipse.
    e.Graphics.DrawEllipse(new Pen(Color.Blue, 3), -80, -40, 160, 80);
}

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

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