Graphics.MultiplyTransform Method

Definition

Namespace:

System.Drawing

Assembly:

System.Drawing.Common.dll

Package:

System.Drawing.Common v8.0.0

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

Overloads

MultiplyTransform(Matrix)	Multiplies the world transformation of this Graphics and specified the Matrix.
MultiplyTransform(Matrix, MatrixOrder)	Multiplies the world transformation of this Graphics and specified the Matrix in the specified order.

MultiplyTransform(Matrix)

Source:

Graphics.cs

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

public:
 void MultiplyTransform(System::Drawing::Drawing2D::Matrix ^ matrix);

public void MultiplyTransform (System.Drawing.Drawing2D.Matrix matrix);

member this.MultiplyTransform : System.Drawing.Drawing2D.Matrix -> unit

Public Sub MultiplyTransform (matrix As Matrix)

Parameters

matrix

Matrix

4x4 Matrix that multiplies the world transformation.

Examples

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.

public:
   void MultiplyTransformMatrix( PaintEventArgs^ e )
   {
      // Create transform matrix.
      Matrix^ transformMatrix = gcnew 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( gcnew Pen( Color::Blue,3.0f ), -80, -40, 160, 80 );
   }

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);
}

Private Sub MultiplyTransformMatrix(ByVal e As PaintEventArgs)

    ' Create transform matrix.
    Dim transformMatrix As 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)
End Sub

Remarks

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

See also

• Matrix Representation of Transformations

MultiplyTransform(Matrix, MatrixOrder)

Source:

Graphics.cs

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

public:
 void MultiplyTransform(System::Drawing::Drawing2D::Matrix ^ matrix, System::Drawing::Drawing2D::MatrixOrder order);

public void MultiplyTransform (System.Drawing.Drawing2D.Matrix matrix, System.Drawing.Drawing2D.MatrixOrder order);

member this.MultiplyTransform : System.Drawing.Drawing2D.Matrix * System.Drawing.Drawing2D.MatrixOrder -> unit

Public Sub MultiplyTransform (matrix As Matrix, order As MatrixOrder)

Parameters

matrix

Matrix

4x4 Matrix that multiplies the world transformation.

order

MatrixOrder

Member of the MatrixOrder enumeration that determines the order of the multiplication.

Examples

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, prepending the rotation matrix for 30 degrees to the form's transformation matrix.

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

• Draws a rotated, translated ellipse.

public:
   void MultiplyTransformMatrixOrder( PaintEventArgs^ e )
   {
      // Create transform matrix.
      Matrix^ transformMatrix = gcnew 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 (append to) transformation matrix of
      // graphics object to translate graphics transformation.
      e->Graphics->MultiplyTransform( transformMatrix, MatrixOrder::Append );

      // Draw rotated, translated ellipse.
      e->Graphics->DrawEllipse( gcnew Pen( Color::Blue,3.0f ), -80, -40, 160, 80 );
   }

private void MultiplyTransformMatrixOrder(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 (append to) transformation matrix of

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

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

Private Sub MultiplyTransformMatrixOrder(ByVal e As PaintEventArgs)

    ' Create transform matrix.
    Dim transformMatrix As 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 (append to) transformation matrix of

    ' graphics object to translate graphics transformation.
    e.Graphics.MultiplyTransform(transformMatrix, MatrixOrder.Append)

    ' Draw rotated, translated ellipse.
    e.Graphics.DrawEllipse(New Pen(Color.Blue, 3), -80, -40, 160, 80)
End Sub

Remarks

A value of Prepend for the order parameter specifies that the order of the multiplication is matrix x world transformation. A value of Append for order specifies that the order of the multiplication is world transformation x matrix.

See also

• Matrix Representation of Transformations