Matrix.RotateAt Metoda

Definicja

Stosuje obrót w prawo w stosunku do określonego punktu Matrix , w zależności od obrotu.Applies a clockwise rotation about the specified point to this Matrix by prepending the rotation.

Przeciążenia

RotateAt(Single, PointF)

Stosuje obrót w prawo do tego Matrix wokół punktu określonego w point parametrze i w zależności od obrotu.Applies a clockwise rotation to this Matrix around the point specified in the point parameter, and by prepending the rotation.

RotateAt(Single, PointF, MatrixOrder)

Stosuje obrót w prawo o określony punkt do tego Matrix w określonej kolejności.Applies a clockwise rotation about the specified point to this Matrix in the specified order.

RotateAt(Single, PointF)

Stosuje obrót w prawo do tego Matrix wokół punktu określonego w point parametrze i w zależności od obrotu.Applies a clockwise rotation to this Matrix around the point specified in the point parameter, and by prepending the rotation.

public:
 void RotateAt(float angle, System::Drawing::PointF point);
public void RotateAt (float angle, System.Drawing.PointF point);
member this.RotateAt : single * System.Drawing.PointF -> unit
Public Sub RotateAt (angle As Single, point As PointF)

Parametry

angle
Single

Kąt (w zakresie) obrotu (w stopniach).The angle (extent) of the rotation, in degrees.

point
PointF

PointFReprezentuje środek obrotu.A PointF that represents the center of the rotation.

Przykłady

Poniższy przykład kodu demonstruje użycie Matrix metody i, Transform Aby obrócić ciąg.The following code example demonstrates using a Matrix and the Transform method to rotate a string. Ten przykład jest przeznaczony do użycia z Windows Forms.This example is designed to be used with Windows Forms. Utwórz formularz i wklej do niego następujący kod.Create a form and paste the following code into it. Wywołaj DrawVerticalStringFromBottomUp metodę w programie Paint obsługi zdarzeń formularza, przekazując e jako PaintEventArgs .Call the DrawVerticalStringFromBottomUp method in the form's Paint event handler, passing e as PaintEventArgs.

private:
   void DrawVerticalStringFromBottomUp( PaintEventArgs^ e )
   {
      // Create the string to draw on the form.
      String^ text = "Can you read this?";

      // Create a GraphicsPath.
      System::Drawing::Drawing2D::GraphicsPath^ path = gcnew System::Drawing::Drawing2D::GraphicsPath;

      // Add the string to the path; declare the font, font style, size, and
      // vertical format for the string.
      path->AddString( text, this->Font->FontFamily, 1, 15, PointF(0.0F,0.0F), gcnew StringFormat( StringFormatFlags::DirectionVertical ) );

      // Declare a matrix that will be used to rotate the text.
      System::Drawing::Drawing2D::Matrix^ rotateMatrix = gcnew System::Drawing::Drawing2D::Matrix;

      // Set the rotation angle and starting point for the text.
      rotateMatrix->RotateAt( 180.0F, PointF(10.0F,100.0F) );

      // Transform the text with the matrix.
      path->Transform(rotateMatrix);

      // Set the SmoothingMode to high quality for best readability.
      e->Graphics->SmoothingMode = System::Drawing::Drawing2D::SmoothingMode::HighQuality;

      // Fill in the path to draw the string.
      e->Graphics->FillPath( Brushes::Red, path );

      // Dispose of the path.
      delete path;
   }
public void DrawVerticalStringFromBottomUp(PaintEventArgs e)
{

    // Create the string to draw on the form.
    string text = "Can you read this?";

    // Create a GraphicsPath.
    System.Drawing.Drawing2D.GraphicsPath path = 
        new System.Drawing.Drawing2D.GraphicsPath();

    // Add the string to the path; declare the font, font style, size, and
    // vertical format for the string.
    path.AddString(text, this.Font.FontFamily, 1, 15, 
        new PointF(0.0F, 0.0F), 
        new StringFormat(StringFormatFlags.DirectionVertical));

    // Declare a matrix that will be used to rotate the text.
    System.Drawing.Drawing2D.Matrix rotateMatrix = 
        new System.Drawing.Drawing2D.Matrix();

    // Set the rotation angle and starting point for the text.
    rotateMatrix.RotateAt(180.0F, new PointF(10.0F, 100.0F));

    // Transform the text with the matrix.
    path.Transform(rotateMatrix);

    // Set the SmoothingMode to high quality for best readability.
    e.Graphics.SmoothingMode = 
        System.Drawing.Drawing2D.SmoothingMode.HighQuality;

    // Fill in the path to draw the string.
    e.Graphics.FillPath(Brushes.Red, path);

    // Dispose of the path.
    path.Dispose();
}
Public Sub DrawVerticalStringFromBottomUp(ByVal e As PaintEventArgs)

    ' Create the string to draw on the form.
    Dim text As String = "Can you read this?"

    ' Create a GraphicsPath.
    Dim path As New System.Drawing.Drawing2D.GraphicsPath

    ' Add the string to the path; declare the font, font style, size, and
    ' vertical format for the string.
    path.AddString(text, Me.Font.FontFamily, 1, 15, New PointF(0.0F, 0.0F), _
        New StringFormat(StringFormatFlags.DirectionVertical))

    ' Declare a matrix that will be used to rotate the text.
    Dim rotateMatrix As New System.Drawing.Drawing2D.Matrix

    ' Set the rotation angle and starting point for the text.
    rotateMatrix.RotateAt(180.0F, New PointF(10.0F, 100.0F))

    ' Transform the text with the matrix.
    path.Transform(rotateMatrix)

    ' Set the SmoothingMode to high quality for best readability.
    e.Graphics.SmoothingMode = Drawing2D.SmoothingMode.HighQuality

    ' Fill in the path to draw the string.
    e.Graphics.FillPath(Brushes.Red, path)

    ' Dispose of the path.
    path.Dispose()

End Sub

Dotyczy

RotateAt(Single, PointF, MatrixOrder)

Stosuje obrót w prawo o określony punkt do tego Matrix w określonej kolejności.Applies a clockwise rotation about the specified point to this Matrix in the specified order.

public:
 void RotateAt(float angle, System::Drawing::PointF point, System::Drawing::Drawing2D::MatrixOrder order);
public void RotateAt (float angle, System.Drawing.PointF point, System.Drawing.Drawing2D.MatrixOrder order);
member this.RotateAt : single * System.Drawing.PointF * System.Drawing.Drawing2D.MatrixOrder -> unit
Public Sub RotateAt (angle As Single, point As PointF, order As MatrixOrder)

Parametry

angle
Single

Kąt obrotu (w stopniach).The angle of the rotation, in degrees.

point
PointF

PointFReprezentuje środek obrotu.A PointF that represents the center of the rotation.

order
MatrixOrder

A MatrixOrder określa kolejność (dołączanie lub łączenie), do której jest stosowany obrót.A MatrixOrder that specifies the order (append or prepend) in which the rotation is applied.

Przykłady

Poniższy przykład kodu jest przeznaczony do użytku z Windows Forms i wymaga PaintEventArgs e Paint obiektu zdarzenia.The following code example is designed for use with Windows Forms, and it requires PaintEventArgse, an Paint event object. Kod wykonuje następujące czynności:The code performs the following actions:

  • Rysuje prostokąt na ekranie przed zastosowaniem transformacji obrotu (niebieskim prostokątem).Draws a rectangle to the screen prior to applying a rotation transform (the blue rectangle).

  • Tworzy macierz i obraca ją o 45 stopni wokół określonego punktu.Creates a matrix and rotates it 45 degrees around a specified point.

  • Stosuje to przekształcenie macierzy do prostokąta.Applies this matrix transform is to the rectangle.

  • Rysuje przekształcony prostokąt do ekranu (czerwony prostokąt).Draws the transformed rectangle to the screen (the red rectangle).

Zwróć uwagę, że czerwony prostokąt został obrócony wokół lewego górnego rogu prostokąta (punkt obrotu określony przez RotateAt metodę).Notice that the red rectangle has been rotated around the upper left-hand corner of the rectangle (the rotation point specified the RotateAt method).

public:
   void RotateAtExample( PaintEventArgs^ e )
   {
      Pen^ myPen = gcnew Pen( Color::Blue,1.0f );
      Pen^ myPen2 = gcnew Pen( Color::Red,1.0f );
      PointF rotatePoint = PointF(150.0f,50.0f);

      // Draw the rectangle to the screen before applying the
      // transform.
      e->Graphics->DrawRectangle( myPen, 150, 50, 200, 100 );

      // Create a matrix and rotate it 45 degrees.
      Matrix^ myMatrix = gcnew Matrix;
      myMatrix->RotateAt( 45, rotatePoint, MatrixOrder::Append );

      // Draw the rectangle to the screen again after applying the
      // transform.
      e->Graphics->Transform = myMatrix;
      e->Graphics->DrawRectangle( myPen2, 150, 50, 200, 100 );
   }
public void RotateAtExample(PaintEventArgs e)
{
    Pen myPen = new Pen(Color.Blue, 1);
    Pen myPen2 = new Pen(Color.Red, 1);
    PointF rotatePoint = new PointF(150.0f, 50.0f);
             
    // Draw the rectangle to the screen before applying the
    // transform.
    e.Graphics.DrawRectangle(myPen, 150, 50, 200, 100);
             
    // Create a matrix and rotate it 45 degrees.
    Matrix myMatrix = new Matrix();
    myMatrix.RotateAt(45, rotatePoint, MatrixOrder.Append);
             
    // Draw the rectangle to the screen again after applying the
    // transform.
    e.Graphics.Transform = myMatrix;
    e.Graphics.DrawRectangle(myPen2, 150, 50, 200, 100);
}
Public Sub RotateAtExample(ByVal e As PaintEventArgs)
    Dim myPen As New Pen(Color.Blue, 1)
    Dim myPen2 As New Pen(Color.Red, 1)
    Dim rotatePoint As New PointF(150.0F, 50.0F)

    ' Draw the rectangle to the screen before applying the
    ' transform.
    e.Graphics.DrawRectangle(myPen, 150, 50, 200, 100)

    ' Create a matrix and rotate it 45 degrees.
    Dim myMatrix As New Matrix
    myMatrix.RotateAt(45, rotatePoint, MatrixOrder.Append)

    ' Draw the rectangle to the screen again after applying the
    ' transform.
    e.Graphics.Transform = myMatrix
    e.Graphics.DrawRectangle(myPen2, 150, 50, 200, 100)
End Sub

Dotyczy