Matrix.TransformPoints Method

Definition

Namespace:

System.Drawing.Drawing2D

Assembly:

System.Drawing.Common.dll

Applies the geometric transform this Matrix represents to an array of points.

Overloads

TransformPoints(PointF[])	Applies the geometric transform represented by this Matrix to a specified array of points.
TransformPoints(Point[])	Applies the geometric transform represented by this Matrix to a specified array of points.

TransformPoints(PointF[])

Applies the geometric transform represented by this Matrix to a specified array of points.

public:
 void TransformPoints(cli::array <System::Drawing::PointF> ^ pts);

public void TransformPoints (System.Drawing.PointF[] pts);

member this.TransformPoints : System.Drawing.PointF[] -> unit

Public Sub TransformPoints (pts As PointF())

Parameters

pts

PointF[]

An array of PointF structures that represents the points to transform.

Examples

For an example, see TransformPoints(Point[]).

TransformPoints(Point[])

Applies the geometric transform represented by this Matrix to a specified array of points.

public:
 void TransformPoints(cli::array <System::Drawing::Point> ^ pts);

public void TransformPoints (System.Drawing.Point[] pts);

member this.TransformPoints : System.Drawing.Point[] -> unit

Public Sub TransformPoints (pts As Point())

Parameters

pts

Point[]

An array of Point structures that represents the points to transform.

Examples

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

• Creates an array of points that form a rectangle.

• Draws this array of points (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 array of points.

• Draws the transformed array 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 TransformPointsExample( PaintEventArgs^ e )
   {
      Pen^ myPen = gcnew Pen( Color::Blue,1.0f );
      Pen^ myPen2 = gcnew Pen( Color::Red,1.0f );

      // Create an array of points.
      array<Point>^ myArray = {Point(20,20),Point(120,20),Point(120,120),Point(20,120),Point(20,20)};

      // Draw the Points to the screen before applying the
      // transform.
      e->Graphics->DrawLines( myPen, myArray );

      // Create a matrix and scale it.
      Matrix^ myMatrix = gcnew Matrix;
      myMatrix->Scale( 3, 2, MatrixOrder::Append );
      myMatrix->TransformPoints( myArray );

      // Draw the Points to the screen again after applying the
      // transform.
      e->Graphics->DrawLines( myPen2, myArray );
   }

public void TransformPointsExample(PaintEventArgs e)
{
    Pen myPen = new Pen(Color.Blue, 1);
    Pen myPen2 = new Pen(Color.Red, 1);
             
    // Create an array of points.
    Point[] myArray =
             {
                 new Point(20, 20),
                 new Point(120, 20),
                 new Point(120, 120),
                 new Point(20, 120),
                 new Point(20,20)
             };
             
    // Draw the Points to the screen before applying the
    // transform.
    e.Graphics.DrawLines(myPen, myArray);
             
    // Create a matrix and scale it.
    Matrix myMatrix = new Matrix();
    myMatrix.Scale(3, 2, MatrixOrder.Append);
    myMatrix.TransformPoints(myArray);
             
    // Draw the Points to the screen again after applying the
    // transform.
    e.Graphics.DrawLines(myPen2, myArray);
}

Public Sub TransformPointsExample(ByVal e As PaintEventArgs)
    Dim myPen As New Pen(Color.Blue, 1)
    Dim myPen2 As New Pen(Color.Red, 1)

    ' Create an array of points.
    Dim myArray As Point() = {New Point(20, 20), New Point(120, 20), _
    New Point(120, 120), New Point(20, 120), New Point(20, 20)}

    ' Draw the Points to the screen before applying the
    ' transform.
    e.Graphics.DrawLines(myPen, myArray)

    ' Create a matrix and scale it.
    Dim myMatrix As New Matrix
    myMatrix.Scale(3, 2, MatrixOrder.Append)
    myMatrix.TransformPoints(myArray)

    ' Draw the Points to the screen again after applying the
    ' transform.
    e.Graphics.DrawLines(myPen2, myArray)
End Sub