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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
)

Parameters

matrix
Type: System.Drawing.Drawing2D.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 PaintEventArgs e, 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);
}


.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
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