Matrix.TransformVectors Método

Definição

Multiplica cada vetor em uma matriz pela matriz.Multiplies each vector in an array by the matrix. Os elementos de translação da matriz (terceira linha) são ignorados.The translation elements of this matrix (third row) are ignored.

Sobrecargas

TransformVectors(Point[])

Aplica somente os componentes de escala e rotação deste Matrix à matriz especificada de pontos.Applies only the scale and rotate components of this Matrix to the specified array of points.

TransformVectors(PointF[])

Multiplica cada vetor em uma matriz pela matriz.Multiplies each vector in an array by the matrix. Os elementos de translação da matriz (terceira linha) são ignorados.The translation elements of this matrix (third row) are ignored.

TransformVectors(Point[])

Aplica somente os componentes de escala e rotação deste Matrix à matriz especificada de pontos.Applies only the scale and rotate components of this Matrix to the specified array of points.

public:
 void TransformVectors(cli::array <System::Drawing::Point> ^ pts);
public void TransformVectors (System.Drawing.Point[] pts);
member this.TransformVectors : System.Drawing.Point[] -> unit
Public Sub TransformVectors (pts As Point())

Parâmetros

pts
Point[]

Uma matriz de estruturas Point que representa os pontos a serem transformados.An array of Point structures that represents the points to transform.

Exemplos

O exemplo de código a seguir foi projetado para uso com Windows Forms, e ele requer PaintEventArgs e um Paint objeto de evento.The following code example is designed for use with Windows Forms, and it requires PaintEventArgse, an Paint event object. O código executa as seguintes ações:The code performs the following actions:

  • Cria uma matriz de pontos que formam um retângulo.Creates an array of points that form a rectangle.

  • Desenha essa matriz de pontos na tela antes de aplicar uma transformação de dimensionamento (o retângulo azul).Draws this array of points to the screen prior to applying a scaling transform (the blue rectangle).

  • Cria uma matriz e a dimensiona por 3 no eixo x e 2 no eixo y e a traduz por 100 em ambos os eixos.Creates a matrix and scales it by 3 in the x-axis and 2 in the y-axis, and translates it by 100 in both axes.

  • Lista os elementos da matriz na tela.Lists the matrix elements to the screen.

  • Aplica essa transformação de matriz à matriz de pontos.Applies this matrix transform to the array of points.

  • Desenha a matriz transformada na tela (o retângulo vermelho).Draws the transformed array to the screen (the red rectangle).

Observe que o retângulo vermelho foi dimensionado por um fator de 3 no eixo x e 2 no eixo y, incluindo o canto superior esquerdo do retângulo (o ponto de início do retângulo), mas o vetor de conversão (os últimos dois elementos da matriz) é ignorado...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) but the translation vector (the last two elements of the matrix) is ignored.

public:
   void TransformVectorsExample( 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, scale it, and translate it.
      Matrix^ myMatrix = gcnew Matrix;
      myMatrix->Scale( 3, 2, MatrixOrder::Append );
      myMatrix->Translate( 100, 100, MatrixOrder::Append );

      // List the matrix elements to the screen.
      ListMatrixElements( e, myMatrix, "Scaled and Translated Matrix", 6, 20 );

      // Apply the transform to the array.
      myMatrix->TransformVectors( myArray );

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

   //-------------------------------------------------------
   // This function is a helper function to
   // list the contents of a matrix.
   //-------------------------------------------------------
   void ListMatrixElements( PaintEventArgs^ e, Matrix^ matrix, String^ matrixName, int numElements, int y )
   {
      // Set up variables for drawing the array
      // of points to the screen.
      int i;
      float x = 20,X = 200;
      System::Drawing::Font^ myFont = gcnew System::Drawing::Font( "Arial",8 );
      SolidBrush^ myBrush = gcnew SolidBrush( Color::Black );

      // Draw the matrix name to the screen.
      e->Graphics->DrawString( String::Concat( matrixName, ":  " ), myFont, myBrush, (float)x, (float)y );

      // Draw the set of path points and types to the screen.
      for ( i = 0; i < numElements; i++ )
      {
         e->Graphics->DrawString( String::Concat( matrix->Elements[ i ], ", " ), myFont, myBrush, (float)X, (float)y );
         X += 30;
      }
   }
public void TransformVectorsExample(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, scale it, and translate it.
    Matrix myMatrix = new Matrix();
    myMatrix.Scale(3, 2, MatrixOrder.Append);
    myMatrix.Translate(100, 100, MatrixOrder.Append);
             
    // List the matrix elements to the screen.
    ListMatrixElements(e,
        myMatrix,
        "Scaled and Translated Matrix",
        6,
        20);
             
    // Apply the transform to the array.
    myMatrix.TransformVectors(myArray);
             
    // Draw the Points to the screen again after applying the
    // transform.
    e.Graphics.DrawLines(myPen2, myArray);
}
             
//-------------------------------------------------------
// This function is a helper function to
// list the contents of a matrix.
//-------------------------------------------------------
public void ListMatrixElements(
    PaintEventArgs e,
    Matrix matrix,
    string matrixName,
    int numElements,
    int y)
{
             
    // Set up variables for drawing the array
    // of points to the screen.
    int i;
    float x = 20, X = 200;
    Font myFont = new Font("Arial", 8);
    SolidBrush myBrush = new SolidBrush(Color.Black);
             
    // Draw the matrix name to the screen.
    e.Graphics.DrawString(
        matrixName + ":  ",
        myFont,
        myBrush,
        x,
        y);
             
    // Draw the set of path points and types to the screen.
    for(i=0; i<numElements; i++)
    {
        e.Graphics.DrawString(
            matrix.Elements[i].ToString() + ", ",
            myFont,
            myBrush,
            X,
            y);
        X += 30;
    }
}
Public Sub TransformVectorsExample(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.Translate(100, 100, MatrixOrder.Append)
    ListMatrixElementsHelper(e, myMatrix, _
    "Scaled and Translated Matrix", 6, 20)
    myMatrix.TransformVectors(myArray)

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

' A helper function to list the contents of a matrix.
Public Sub ListMatrixElementsHelper(ByVal e As PaintEventArgs, _
ByVal matrix As Matrix, ByVal matrixName As String, ByVal numElements As Integer, _
ByVal y As Integer)

    ' Set up variables for drawing the array
    ' of points to the screen.
    Dim i As Integer
    Dim x As Single = 20
    Dim j As Single = 200
    Dim myFont As New Font("Arial", 8)
    Dim myBrush As New SolidBrush(Color.Black)

    ' Draw the matrix name to the screen.
    e.Graphics.DrawString(matrixName + ":  ", myFont, myBrush, x, y)

    ' Draw the set of path points and types to the screen.
    For i = 0 To numElements - 1
        e.Graphics.DrawString(matrix.Elements(i).ToString() + ", ", _
        myFont, myBrush, j, y)
        j += 30
    Next i
End Sub

Aplica-se a

TransformVectors(PointF[])

Multiplica cada vetor em uma matriz pela matriz.Multiplies each vector in an array by the matrix. Os elementos de translação da matriz (terceira linha) são ignorados.The translation elements of this matrix (third row) are ignored.

public:
 void TransformVectors(cli::array <System::Drawing::PointF> ^ pts);
public void TransformVectors (System.Drawing.PointF[] pts);
member this.TransformVectors : System.Drawing.PointF[] -> unit
Public Sub TransformVectors (pts As PointF())

Parâmetros

pts
PointF[]

Uma matriz de estruturas Point que representa os pontos a serem transformados.An array of Point structures that represents the points to transform.

Exemplos

Para ver um exemplo, consulte TransformVectors(Point[]).For an example, see TransformVectors(Point[]).

Aplica-se a