Graphics.DrawCurve Metodo

Origine:

Graphics.cs

Origine:

Graphics.cs

public:
 void DrawCurve(System::Drawing::Pen ^ pen, ReadOnlySpan<System::Drawing::PointF> points, float tension);

public void DrawCurve (System.Drawing.Pen pen, ReadOnlySpan<System.Drawing.PointF> points, float tension);

member this.DrawCurve : System.Drawing.Pen * ReadOnlySpan<System.Drawing.PointF> * single -> unit

Public Sub DrawCurve (pen As Pen, points As ReadOnlySpan(Of PointF), tension As Single)

Parametri

Origine:

Graphics.cs

Origine:

Graphics.cs

public:
 void DrawCurve(System::Drawing::Pen ^ pen, ReadOnlySpan<System::Drawing::PointF> points, int offset, int numberOfSegments, float tension);

public void DrawCurve (System.Drawing.Pen pen, ReadOnlySpan<System.Drawing.PointF> points, int offset, int numberOfSegments, float tension);

member this.DrawCurve : System.Drawing.Pen * ReadOnlySpan<System.Drawing.PointF> * int * int * single -> unit

Public Sub DrawCurve (pen As Pen, points As ReadOnlySpan(Of PointF), offset As Integer, numberOfSegments As Integer, tension As Single)

Parametri

Origine:

Graphics.cs

Origine:

Graphics.cs

public:
 void DrawCurve(System::Drawing::Pen ^ pen, ReadOnlySpan<System::Drawing::Point> points, int offset, int numberOfSegments, float tension);

public void DrawCurve (System.Drawing.Pen pen, ReadOnlySpan<System.Drawing.Point> points, int offset, int numberOfSegments, float tension);

member this.DrawCurve : System.Drawing.Pen * ReadOnlySpan<System.Drawing.Point> * int * int * single -> unit

Public Sub DrawCurve (pen As Pen, points As ReadOnlySpan(Of Point), offset As Integer, numberOfSegments As Integer, tension As Single)

Parametri

Origine:

Graphics.cs

Origine:

Graphics.cs

Origine:

Graphics.cs

Origine:

Graphics.cs

Origine:

Graphics.cs

public:
 void DrawCurve(System::Drawing::Pen ^ pen, cli::array <System::Drawing::PointF> ^ points, int offset, int numberOfSegments, float tension);

public void DrawCurve (System.Drawing.Pen pen, System.Drawing.PointF[] points, int offset, int numberOfSegments, float tension);

member this.DrawCurve : System.Drawing.Pen * System.Drawing.PointF[] * int * int * single -> unit

Public Sub DrawCurve (pen As Pen, points As PointF(), offset As Integer, numberOfSegments As Integer, tension As Single)

Parametri

Eccezioni

Esempio

L'esempio di codice seguente è progettato per l'uso con Windows Form e richiede PaintEventArgse, che è un parametro del gestore eventi Paint. Il codice esegue le azioni seguenti:

• Crea penne rosse e verdi.

• Crea sette punti per definire una curva.

• Disegna sei linee rette rosse tra i sette punti per formare un poligono incompleto.

• Definisce l'offset del punto iniziale e il numero di segmenti.

• Definisce la tensione.

• Disegna una curva verde aperta (a partire dal terzo punto) negli ultimi cinque punti.

Il metodo imposta la tensione su 1,0.

private:
   void DrawCurvePointFSegmentTension( PaintEventArgs^ e )
   {
      // Create pens.
      Pen^ redPen = gcnew Pen( Color::Red,3.0f );
      Pen^ greenPen = gcnew Pen( Color::Green,3.0f );

      // Create points that define curve.
      PointF point1 = PointF(50.0F,50.0F);
      PointF point2 = PointF(100.0F,25.0F);
      PointF point3 = PointF(200.0F,5.0F);
      PointF point4 = PointF(250.0F,50.0F);
      PointF point5 = PointF(300.0F,100.0F);
      PointF point6 = PointF(350.0F,200.0F);
      PointF point7 = PointF(250.0F,250.0F);
      array<PointF>^ curvePoints = {point1,point2,point3,point4,point5,point6,point7};

      // Draw lines between original points to screen.
      e->Graphics->DrawLines( redPen, curvePoints );

      // Create offset, number of segments, and tension.
      int offset = 2;
      int numSegments = 4;
      float tension = 1.0F;

      // Draw curve to screen.
      e->Graphics->DrawCurve( greenPen, curvePoints, offset, numSegments, tension );
   }

private void DrawCurvePointFSegmentTension(PaintEventArgs e)
{

    // Create pens.
    Pen redPen = new Pen(Color.Red, 3);
    Pen greenPen = new Pen(Color.Green, 3);

    // Create points that define curve.
    PointF point1 = new PointF(50.0F, 50.0F);
    PointF point2 = new PointF(100.0F, 25.0F);
    PointF point3 = new PointF(200.0F, 5.0F);
    PointF point4 = new PointF(250.0F, 50.0F);
    PointF point5 = new PointF(300.0F, 100.0F);
    PointF point6 = new PointF(350.0F, 200.0F);
    PointF point7 = new PointF(250.0F, 250.0F);
    PointF[] curvePoints = {point1, point2, point3, point4, point5, point6, point7};

    // Draw lines between original points to screen.
    e.Graphics.DrawLines(redPen, curvePoints);

    // Create offset, number of segments, and tension.
    int offset = 2;
    int numSegments = 4;
    float tension = 1.0F;

    // Draw curve to screen.
    e.Graphics.DrawCurve(greenPen, curvePoints, offset, numSegments, tension);
}

Private Sub DrawCurvePointFSegmentTension(ByVal e As PaintEventArgs)

    ' Create pens.
    Dim redPen As New Pen(Color.Red, 3)
    Dim greenPen As New Pen(Color.Green, 3)

    ' Create points that define curve.
    Dim point1 As New PointF(50.0F, 50.0F)
    Dim point2 As New PointF(100.0F, 25.0F)
    Dim point3 As New PointF(200.0F, 5.0F)
    Dim point4 As New PointF(250.0F, 50.0F)
    Dim point5 As New PointF(300.0F, 100.0F)
    Dim point6 As New PointF(350.0F, 200.0F)
    Dim point7 As New PointF(250.0F, 250.0F)
    Dim curvePoints As PointF() = {point1, point2, point3, point4, _
    point5, point6, point7}

    ' Draw lines between original points to screen.
    e.Graphics.DrawLines(redPen, curvePoints)

    ' Create offset, number of segments, and tension.
    Dim offset As Integer = 2
    Dim numSegments As Integer = 4
    Dim tension As Single = 1.0F

    ' Draw curve to screen.
    e.Graphics.DrawCurve(greenPen, curvePoints, offset, numSegments, _
    tension)
End Sub

Commenti

Questo metodo disegna una spline cardinale che passa attraverso ogni punto della matrice.

La matrice di punti deve contenere almeno tre strutture PointF per la curva da disegnare.

Il valore del parametro offset specifica il numero di elementi da ignorare nella matrice. Il primo elemento dopo gli elementi ignorati rappresenta il punto iniziale della curva.

Il valore del parametro numberOfSegments specifica il numero di segmenti, dopo il punto iniziale, da disegnare nella curva. Il valore del parametro numberOfSegments deve essere almeno 1. Il valore del parametro offset più il valore del parametro numberOfSegments deve essere minore del numero di elementi nella matrice del parametro points.

Il parametro tension determina la forma della spline. Se il valore del parametro tension è 0,0F, questo metodo disegna segmenti di linea retta per connettere i punti. In genere, il parametro tension è minore o uguale a 1,0F. I valori superiori a 1,0F producono risultati insoliti.

Origine:

Graphics.cs

Origine:

Graphics.cs

Origine:

Graphics.cs

Origine:

Graphics.cs

Origine:

Graphics.cs

public:
 void DrawCurve(System::Drawing::Pen ^ pen, cli::array <System::Drawing::Point> ^ points, int offset, int numberOfSegments, float tension);

public void DrawCurve (System.Drawing.Pen pen, System.Drawing.Point[] points, int offset, int numberOfSegments, float tension);

member this.DrawCurve : System.Drawing.Pen * System.Drawing.Point[] * int * int * single -> unit

Public Sub DrawCurve (pen As Pen, points As Point(), offset As Integer, numberOfSegments As Integer, tension As Single)

Parametri

Eccezioni

Esempio

L'esempio di codice seguente è progettato per l'uso con Windows Form e richiede PaintEventArgse, che è un parametro del gestore eventi Paint. Il codice esegue le azioni seguenti:

• Crea penne rosse e verdi.

• Crea sette punti per definire una curva.

• Disegna sei linee rette rosse tra i sette punti per formare un poligono incompleto.

• Definisce l'offset del punto iniziale e il numero di segmenti.

• Definisce la tensione.

• Disegna una curva verde aperta (a partire dal terzo punto) negli ultimi cinque punti.

Il metodo imposta la tensione su 1,0.

private:
   void DrawCurvePointSegmentTension( PaintEventArgs^ e )
   {
      // Create pens.
      Pen^ redPen = gcnew Pen( Color::Red,3.0f );
      Pen^ greenPen = gcnew Pen( Color::Green,3.0f );

      // Create points that define curve.
      Point point1 = Point(50,50);
      Point point2 = Point(100,25);
      Point point3 = Point(200,5);
      Point point4 = Point(250,50);
      Point point5 = Point(300,100);
      Point point6 = Point(350,200);
      Point point7 = Point(250,250);
      array<Point>^ curvePoints = {point1,point2,point3,point4,point5,point6,point7};

      // Draw lines between original points to screen.
      e->Graphics->DrawLines( redPen, curvePoints );

      // Create offset, number of segments, and tension.
      int offset = 2;
      int numSegments = 4;
      float tension = 1.0F;

      // Draw curve to screen.
      e->Graphics->DrawCurve( greenPen, curvePoints, offset, numSegments, tension );
   }

private void DrawCurvePointSegmentTension(PaintEventArgs e)
{

    // Create pens.
    Pen redPen = new Pen(Color.Red, 3);
    Pen greenPen = new Pen(Color.Green, 3);

    // Create points that define curve.
    Point point1 = new Point(50, 50);
    Point point2 = new Point(100, 25);
    Point point3 = new Point(200, 5);
    Point point4 = new Point(250, 50);
    Point point5 = new Point(300, 100);
    Point point6 = new Point(350, 200);
    Point point7 = new Point(250, 250);
    Point[] curvePoints = {point1, point2, point3, point4, point5, point6, point7};

    // Draw lines between original points to screen.
    e.Graphics.DrawLines(redPen, curvePoints);

    // Create offset, number of segments, and tension.
    int offset = 2;
    int numSegments = 4;
    float tension = 1.0F;

    // Draw curve to screen.
    e.Graphics.DrawCurve(greenPen, curvePoints, offset, numSegments, tension);
}

Private Sub DrawCurvePointSegmentTension(ByVal e As PaintEventArgs)

    ' Create pens.
    Dim redPen As New Pen(Color.Red, 3)
    Dim greenPen As New Pen(Color.Green, 3)

    ' Create points that define curve.
    Dim point1 As New Point(50, 50)
    Dim point2 As New Point(100, 25)
    Dim point3 As New Point(200, 5)
    Dim point4 As New Point(250, 50)
    Dim point5 As New Point(300, 100)
    Dim point6 As New Point(350, 200)
    Dim point7 As New Point(250, 250)
    Dim curvePoints As Point() = {point1, point2, point3, point4, _
    point5, point6, point7}

    ' Draw lines between original points to screen.
    e.Graphics.DrawLines(redPen, curvePoints)

    ' Create offset, number of segments, and tension.
    Dim offset As Integer = 2
    Dim numSegments As Integer = 4
    Dim tension As Single = 1.0F

    ' Draw curve to screen.
    e.Graphics.DrawCurve(greenPen, curvePoints, offset, numSegments, _
    tension)
End Sub

Commenti

Questo metodo disegna una spline cardinale che passa attraverso ogni punto della matrice.

La matrice di punti deve contenere almeno tre strutture Point per disegnare una curva.

Il valore del parametro offset specifica il numero di elementi da ignorare nella matrice. Il primo elemento dopo gli elementi ignorati rappresenta il punto iniziale della curva.

Il valore del parametro numberOfSegments specifica il numero di segmenti, dopo il punto iniziale, da disegnare nella curva. Il valore del parametro numberOfSegments deve essere almeno 1. Il valore del parametro offset più il valore del parametro numberOfSegments deve essere minore del numero di elementi nella matrice del parametro points.

Il parametro tension determina la forma della spline. Se il valore del parametro tension è 0,0F, questo metodo disegna segmenti di linea retta per connettere i punti. In genere, il parametro tension è minore o uguale a 1,0F. I valori superiori a 1,0F producono risultati insoliti.

Origine:

Graphics.cs

Origine:

Graphics.cs

public:
 void DrawCurve(System::Drawing::Pen ^ pen, ReadOnlySpan<System::Drawing::PointF> points, int offset, int numberOfSegments);

public void DrawCurve (System.Drawing.Pen pen, ReadOnlySpan<System.Drawing.PointF> points, int offset, int numberOfSegments);

member this.DrawCurve : System.Drawing.Pen * ReadOnlySpan<System.Drawing.PointF> * int * int -> unit

Public Sub DrawCurve (pen As Pen, points As ReadOnlySpan(Of PointF), offset As Integer, numberOfSegments As Integer)

Parametri

Origine:

Graphics.cs

Origine:

Graphics.cs

Origine:

Graphics.cs

Origine:

Graphics.cs

Origine:

Graphics.cs

public:
 void DrawCurve(System::Drawing::Pen ^ pen, cli::array <System::Drawing::PointF> ^ points, int offset, int numberOfSegments);

public void DrawCurve (System.Drawing.Pen pen, System.Drawing.PointF[] points, int offset, int numberOfSegments);

member this.DrawCurve : System.Drawing.Pen * System.Drawing.PointF[] * int * int -> unit

Public Sub DrawCurve (pen As Pen, points As PointF(), offset As Integer, numberOfSegments As Integer)

Parametri

Eccezioni

Esempio

L'esempio di codice seguente è progettato per l'uso con Windows Form e richiede PaintEventArgse, che è un parametro del gestore eventi Paint. Il codice esegue le azioni seguenti:

• Crea penne rosse e verdi.

• Crea sette punti per definire una curva.

• Disegna sei linee rette rosse tra i sette punti per formare un poligono incompleto.

• Definisce l'offset del punto iniziale e il numero di segmenti.

• Disegna una curva verde aperta (a partire dal terzo punto) negli ultimi cinque punti.

Il metodo usa una tensione predefinita di 0,5.

private:
   void DrawCurvePointFSegments( PaintEventArgs^ e )
   {
      // Create pens.
      Pen^ redPen = gcnew Pen( Color::Red,3.0f );
      Pen^ greenPen = gcnew Pen( Color::Green,3.0f );

      // Create points that define curve.
      PointF point1 = PointF(50.0F,50.0F);
      PointF point2 = PointF(100.0F,25.0F);
      PointF point3 = PointF(200.0F,5.0F);
      PointF point4 = PointF(250.0F,50.0F);
      PointF point5 = PointF(300.0F,100.0F);
      PointF point6 = PointF(350.0F,200.0F);
      PointF point7 = PointF(250.0F,250.0F);
      array<PointF>^ curvePoints = {point1,point2,point3,point4,point5,point6,point7};

      // Draw lines between original points to screen.
      e->Graphics->DrawLines( redPen, curvePoints );

      // Create offset and number of segments.
      int offset = 2;
      int numSegments = 4;

      // Draw curve to screen.
      e->Graphics->DrawCurve( greenPen, curvePoints, offset, numSegments );
   }

private void DrawCurvePointFSegments(PaintEventArgs e)
{

    // Create pens.
    Pen redPen = new Pen(Color.Red, 3);
    Pen greenPen = new Pen(Color.Green, 3);

    // Create points that define curve.
    PointF point1 = new PointF(50.0F, 50.0F);
    PointF point2 = new PointF(100.0F, 25.0F);
    PointF point3 = new PointF(200.0F, 5.0F);
    PointF point4 = new PointF(250.0F, 50.0F);
    PointF point5 = new PointF(300.0F, 100.0F);
    PointF point6 = new PointF(350.0F, 200.0F);
    PointF point7 = new PointF(250.0F, 250.0F);
    PointF[] curvePoints = {point1, point2, point3, point4, point5, point6, point7};

    // Draw lines between original points to screen.
    e.Graphics.DrawLines(redPen, curvePoints);

    // Create offset and number of segments.
    int offset = 2;
    int numSegments = 4;

    // Draw curve to screen.
    e.Graphics.DrawCurve(greenPen, curvePoints, offset, numSegments);
}

Private Sub DrawCurvePointFSegments(ByVal e As PaintEventArgs)

    ' Create pens.
    Dim redPen As New Pen(Color.Red, 3)
    Dim greenPen As New Pen(Color.Green, 3)

    ' Create points that define curve.
    Dim point1 As New PointF(50.0F, 50.0F)
    Dim point2 As New PointF(100.0F, 25.0F)
    Dim point3 As New PointF(200.0F, 5.0F)
    Dim point4 As New PointF(250.0F, 50.0F)
    Dim point5 As New PointF(300.0F, 100.0F)
    Dim point6 As New PointF(350.0F, 200.0F)
    Dim point7 As New PointF(250.0F, 250.0F)
    Dim curvePoints As PointF() = {point1, point2, point3, point4, _
    point5, point6, point7}

    ' Draw lines between original points to screen.
    e.Graphics.DrawLines(redPen, curvePoints)

    ' Create offset and number of segments.
    Dim offset As Integer = 2
    Dim numSegments As Integer = 4

    ' Draw curve to screen.
    e.Graphics.DrawCurve(greenPen, curvePoints, offset, numSegments)
End Sub

Commenti

Questo metodo disegna una spline cardinale che passa attraverso ogni punto della matrice.

La matrice di punti deve contenere almeno tre strutture PointF per disegnare una curva.

Il valore del parametro offset specifica il numero di elementi da ignorare nella matrice. Il primo elemento dopo gli elementi ignorati rappresenta il punto iniziale della curva.

Il valore del parametro numberOfSegments specifica il numero di segmenti, dopo il punto iniziale, da disegnare nella curva. Il valore del parametro numberOfSegments deve essere almeno 1. Il valore del parametro offset più il valore del parametro numberOfSegments deve essere minore del numero di elementi nella matrice del parametro points.

Questo metodo usa una tensione predefinita di 0,5.

Origine:

Graphics.cs

Origine:

Graphics.cs

Origine:

Graphics.cs

Origine:

Graphics.cs

Origine:

Graphics.cs

public:
 void DrawCurve(System::Drawing::Pen ^ pen, cli::array <System::Drawing::PointF> ^ points, float tension);

public void DrawCurve (System.Drawing.Pen pen, System.Drawing.PointF[] points, float tension);

member this.DrawCurve : System.Drawing.Pen * System.Drawing.PointF[] * single -> unit

Public Sub DrawCurve (pen As Pen, points As PointF(), tension As Single)

Parametri

Eccezioni

Esempio

L'esempio di codice seguente è progettato per l'uso con Windows Form e richiede PaintEventArgse, che è un parametro del gestore eventi Paint. Il codice esegue le azioni seguenti:

• Crea penne rosse e verdi.

• Crea sette punti per definire la curva.

• Disegna sei linee rette rosse tra i sette punti per formare un poligono incompleto.

• Crea un'impostazione di tensione.

• Disegna una curva verde aperta chiusa attraverso i sette punti.

Il metodo utilizza una tensione di 1,0.

private:
   void DrawCurvePointFTension( PaintEventArgs^ e )
   {
      // Create pens.
      Pen^ redPen = gcnew Pen( Color::Red,3.0f );
      Pen^ greenPen = gcnew Pen( Color::Green,3.0f );

      // Create points that define curve.
      PointF point1 = PointF(50.0F,50.0F);
      PointF point2 = PointF(100.0F,25.0F);
      PointF point3 = PointF(200.0F,5.0F);
      PointF point4 = PointF(250.0F,50.0F);
      PointF point5 = PointF(300.0F,100.0F);
      PointF point6 = PointF(350.0F,200.0F);
      PointF point7 = PointF(250.0F,250.0F);
      array<PointF>^ curvePoints = {point1,point2,point3,point4,point5,point6,point7};

      // Draw lines between original points to screen.
      e->Graphics->DrawLines( redPen, curvePoints );

      // Create tension.
      float tension = 1.0F;

      // Draw curve to screen.
      e->Graphics->DrawCurve( greenPen, curvePoints, tension );
   }

private void DrawCurvePointFTension(PaintEventArgs e)
{

    // Create pens.
    Pen redPen = new Pen(Color.Red, 3);
    Pen greenPen = new Pen(Color.Green, 3);

    // Create points that define curve.
    PointF point1 = new PointF(50.0F, 50.0F);
    PointF point2 = new PointF(100.0F, 25.0F);
    PointF point3 = new PointF(200.0F, 5.0F);
    PointF point4 = new PointF(250.0F, 50.0F);
    PointF point5 = new PointF(300.0F, 100.0F);
    PointF point6 = new PointF(350.0F, 200.0F);
    PointF point7 = new PointF(250.0F, 250.0F);
    PointF[] curvePoints = {point1, point2, point3, point4, point5, point6, point7};

    // Draw lines between original points to screen.
    e.Graphics.DrawLines(redPen, curvePoints);

    // Create tension.
    float tension = 1.0F;

    // Draw curve to screen.
    e.Graphics.DrawCurve(greenPen, curvePoints, tension);
}

Private Sub DrawCurvePointFTension(ByVal e As PaintEventArgs)

    ' Create pens.
    Dim redPen As New Pen(Color.Red, 3)
    Dim greenPen As New Pen(Color.Green, 3)

    ' Create points that define curve.
    Dim point1 As New PointF(50.0F, 50.0F)
    Dim point2 As New PointF(100.0F, 25.0F)
    Dim point3 As New PointF(200.0F, 5.0F)
    Dim point4 As New PointF(250.0F, 50.0F)
    Dim point5 As New PointF(300.0F, 100.0F)
    Dim point6 As New PointF(350.0F, 200.0F)
    Dim point7 As New PointF(250.0F, 250.0F)
    Dim curvePoints As PointF() = {point1, point2, point3, point4, _
    point5, point6, point7}

    ' Draw lines between original points to screen.
    e.Graphics.DrawLines(redPen, curvePoints)

    ' Create tension.
    Dim tension As Single = 1.0F

    ' Draw curve to screen.
    e.Graphics.DrawCurve(greenPen, curvePoints, tension)
End Sub

Commenti

Questo metodo disegna una spline cardinale che passa attraverso ogni punto della matrice.

La matrice di punti deve contenere almeno tre strutture PointF per disegnare una curva.

Il parametro tension determina la forma della spline. Se il valore del parametro tension è 0,0F, questo metodo disegna segmenti di linea retta per connettere i punti. In genere, il parametro tension è minore o uguale a 1,0F. I valori superiori a 1,0F producono risultati insoliti.

Origine:

Graphics.cs

Origine:

Graphics.cs

Origine:

Graphics.cs

Origine:

Graphics.cs

Origine:

Graphics.cs

public:
 void DrawCurve(System::Drawing::Pen ^ pen, cli::array <System::Drawing::Point> ^ points, float tension);

public void DrawCurve (System.Drawing.Pen pen, System.Drawing.Point[] points, float tension);

member this.DrawCurve : System.Drawing.Pen * System.Drawing.Point[] * single -> unit

Public Sub DrawCurve (pen As Pen, points As Point(), tension As Single)

Parametri

Eccezioni

Esempio

L'esempio di codice seguente è progettato per l'uso con Windows Form e richiede PaintEventArgse, che è un parametro del gestore eventi Paint. Il codice esegue le azioni seguenti:

• Crea penne rosse e verdi.

• Crea sette punti per definire la curva.

• Disegna sei linee rette rosse tra i sette punti per formare un poligono incompleto.

• Crea un'impostazione di tensione.

• Disegna una curva verde aperta chiusa attraverso i sette punti.

Il metodo utilizza una tensione di 1,0.

private:
   void DrawCurvePointTension( PaintEventArgs^ e )
   {

      // Create pens.
      Pen^ redPen = gcnew Pen( Color::Red,3.0f );
      Pen^ greenPen = gcnew Pen( Color::Green,3.0f );

      // Create points that define curve.
      Point point1 = Point(50,50);
      Point point2 = Point(100,25);
      Point point3 = Point(200,5);
      Point point4 = Point(250,50);
      Point point5 = Point(300,100);
      Point point6 = Point(350,200);
      Point point7 = Point(250,250);
      array<Point>^ curvePoints = {point1,point2,point3,point4,point5,point6,point7};

      // Draw lines between original points to screen.
      e->Graphics->DrawLines( redPen, curvePoints );

      // Create tension.
      float tension = 1.0F;

      // Draw curve to screen.
      e->Graphics->DrawCurve( greenPen, curvePoints, tension );
   }

private void DrawCurvePointTension(PaintEventArgs e)
{

    // Create pens.
    Pen redPen = new Pen(Color.Red, 3);
    Pen greenPen = new Pen(Color.Green, 3);

    // Create points that define curve.
    Point point1 = new Point(50, 50);
    Point point2 = new Point(100, 25);
    Point point3 = new Point(200, 5);
    Point point4 = new Point(250, 50);
    Point point5 = new Point(300, 100);
    Point point6 = new Point(350, 200);
    Point point7 = new Point(250, 250);
    Point[] curvePoints = {point1, point2, point3, point4, point5, point6, point7};

    // Draw lines between original points to screen.
    e.Graphics.DrawLines(redPen, curvePoints);

    // Create tension.
    float tension = 1.0F;

    // Draw curve to screen.
    e.Graphics.DrawCurve(greenPen, curvePoints, tension);
}

Private Sub DrawCurvePointTension(ByVal e As PaintEventArgs)

    ' Create pens.
    Dim redPen As New Pen(Color.Red, 3)
    Dim greenPen As New Pen(Color.Green, 3)

    ' Create points that define curve.
    Dim point1 As New Point(50, 50)
    Dim point2 As New Point(100, 25)
    Dim point3 As New Point(200, 5)
    Dim point4 As New Point(250, 50)
    Dim point5 As New Point(300, 100)
    Dim point6 As New Point(350, 200)
    Dim point7 As New Point(250, 250)
    Dim curvePoints As Point() = {point1, point2, point3, point4, _
    point5, point6, point7}

    ' Draw lines between original points to screen.
    e.Graphics.DrawLines(redPen, curvePoints)

    ' Create tension.
    Dim tension As Single = 1.0F

    ' Draw curve to screen.
    e.Graphics.DrawCurve(greenPen, curvePoints, tension)
End Sub

Commenti

Questo metodo disegna una spline cardinale che passa attraverso ogni punto della matrice.

La matrice di punti deve contenere almeno tre strutture Point per disegnare una curva.

Il parametro tension determina la forma della spline. Se il valore del parametro tension è 0,0F, questo metodo disegna segmenti di linea retta per connettere i punti. In genere, il parametro tension è minore o uguale a 1,0F. I valori superiori a 1,0F producono risultati insoliti.

Origine:

Graphics.cs

Origine:

Graphics.cs

public:
 void DrawCurve(System::Drawing::Pen ^ pen, ReadOnlySpan<System::Drawing::PointF> points);

public void DrawCurve (System.Drawing.Pen pen, scoped ReadOnlySpan<System.Drawing.PointF> points);

member this.DrawCurve : System.Drawing.Pen * ReadOnlySpan<System.Drawing.PointF> -> unit

Public Sub DrawCurve (pen As Pen, points As ReadOnlySpan(Of PointF))

Parametri

Origine:

Graphics.cs

Origine:

Graphics.cs

public:
 void DrawCurve(System::Drawing::Pen ^ pen, ReadOnlySpan<System::Drawing::Point> points);

public void DrawCurve (System.Drawing.Pen pen, scoped ReadOnlySpan<System.Drawing.Point> points);

member this.DrawCurve : System.Drawing.Pen * ReadOnlySpan<System.Drawing.Point> -> unit

Public Sub DrawCurve (pen As Pen, points As ReadOnlySpan(Of Point))

Parametri

Origine:

Graphics.cs

Origine:

Graphics.cs

Origine:

Graphics.cs

Origine:

Graphics.cs

Origine:

Graphics.cs

public:
 void DrawCurve(System::Drawing::Pen ^ pen, cli::array <System::Drawing::PointF> ^ points);

public:
 void DrawCurve(System::Drawing::Pen ^ pen, ... cli::array <System::Drawing::PointF> ^ points);

public void DrawCurve (System.Drawing.Pen pen, System.Drawing.PointF[] points);

public void DrawCurve (System.Drawing.Pen pen, params System.Drawing.PointF[] points);

member this.DrawCurve : System.Drawing.Pen * System.Drawing.PointF[] -> unit

Public Sub DrawCurve (pen As Pen, points As PointF())

Public Sub DrawCurve (pen As Pen, ParamArray points As PointF())

Parametri

Eccezioni

Esempio

L'esempio di codice seguente è progettato per l'uso con Windows Form e richiede PaintEventArgse, che è un parametro del gestore eventi Paint. Il codice esegue le azioni seguenti:

• Crea penne rosse e verdi.

• Crea sette punti per definire una curva.

• Disegna sei linee rette rosse tra i sette punti per formare un poligono incompleto.

• Disegna una curva verde aperta attraverso i sette punti.

Il metodo usa una tensione predefinita di 0,5.

private:
   void DrawCurvePointF( PaintEventArgs^ e )
   {
      // Create pens.
      Pen^ redPen = gcnew Pen( Color::Red,3.0f );
      Pen^ greenPen = gcnew Pen( Color::Green,3.0f );

      // Create points that define curve.
      PointF point1 = PointF(50.0F,50.0F);
      PointF point2 = PointF(100.0F,25.0F);
      PointF point3 = PointF(200.0F,5.0F);
      PointF point4 = PointF(250.0F,50.0F);
      PointF point5 = PointF(300.0F,100.0F);
      PointF point6 = PointF(350.0F,200.0F);
      PointF point7 = PointF(250.0F,250.0F);
      array<PointF>^ curvePoints = {point1,point2,point3,point4,point5,point6,point7};

      // Draw lines between original points to screen.
      e->Graphics->DrawLines( redPen, curvePoints );

      // Draw curve to screen.
      e->Graphics->DrawCurve( greenPen, curvePoints );
   }

private void DrawCurvePointF(PaintEventArgs e)
{

    // Create pens.
    Pen redPen = new Pen(Color.Red, 3);
    Pen greenPen = new Pen(Color.Green, 3);

    // Create points that define curve.
    PointF point1 = new PointF(50.0F, 50.0F);
    PointF point2 = new PointF(100.0F, 25.0F);
    PointF point3 = new PointF(200.0F, 5.0F);
    PointF point4 = new PointF(250.0F, 50.0F);
    PointF point5 = new PointF(300.0F, 100.0F);
    PointF point6 = new PointF(350.0F, 200.0F);
    PointF point7 = new PointF(250.0F, 250.0F);
    PointF[] curvePoints = {point1, point2, point3, point4, point5, point6, point7};

    // Draw lines between original points to screen.
    e.Graphics.DrawLines(redPen, curvePoints);

    // Draw curve to screen.
    e.Graphics.DrawCurve(greenPen, curvePoints);
}

Private Sub DrawCurvePointF(ByVal e As PaintEventArgs)

    ' Create pens.
    Dim redPen As New Pen(Color.Red, 3)
    Dim greenPen As New Pen(Color.Green, 3)

    ' Create points that define curve.
    Dim point1 As New PointF(50.0F, 50.0F)
    Dim point2 As New PointF(100.0F, 25.0F)
    Dim point3 As New PointF(200.0F, 5.0F)
    Dim point4 As New PointF(250.0F, 50.0F)
    Dim point5 As New PointF(300.0F, 100.0F)
    Dim point6 As New PointF(350.0F, 200.0F)
    Dim point7 As New PointF(250.0F, 250.0F)
    Dim curvePoints As PointF() = {point1, point2, point3, point4, _
    point5, point6, point7}

    ' Draw lines between original points to screen.
    e.Graphics.DrawLines(redPen, curvePoints)

    ' Draw curve to screen.
    e.Graphics.DrawCurve(greenPen, curvePoints)
End Sub

Commenti

Questo metodo disegna una spline cardinale che passa attraverso ogni punto della matrice.

La matrice di punti deve contenere almeno tre strutture PointF per disegnare una curva.

Questo metodo usa una tensione predefinita di 0,5.

Origine:

Graphics.cs

Origine:

Graphics.cs

Origine:

Graphics.cs

Origine:

Graphics.cs

Origine:

Graphics.cs

public:
 void DrawCurve(System::Drawing::Pen ^ pen, cli::array <System::Drawing::Point> ^ points);

public:
 void DrawCurve(System::Drawing::Pen ^ pen, ... cli::array <System::Drawing::Point> ^ points);

public void DrawCurve (System.Drawing.Pen pen, System.Drawing.Point[] points);

public void DrawCurve (System.Drawing.Pen pen, params System.Drawing.Point[] points);

member this.DrawCurve : System.Drawing.Pen * System.Drawing.Point[] -> unit

Public Sub DrawCurve (pen As Pen, points As Point())

Public Sub DrawCurve (pen As Pen, ParamArray points As Point())

Parametri

Eccezioni

Esempio

L'esempio di codice seguente è progettato per l'uso con Windows Form e richiede PaintEventArgse, che è un parametro del gestore eventi Paint. Il codice esegue le azioni seguenti:

• Crea penne rosse e verdi.

• Crea sette punti per definire una curva.

• Disegna sei linee rette rosse tra i sette punti per formare un poligono incompleto.

• Disegna una curva verde aperta attraverso i sette punti.

Il metodo usa una tensione predefinita di 0,5.

private:
   void DrawCurvePoint( PaintEventArgs^ e )
   {
      // Create pens.
      Pen^ redPen = gcnew Pen( Color::Red,3.0f );
      Pen^ greenPen = gcnew Pen( Color::Green,3.0f );

      // Create points that define curve.
      Point point1 = Point(50,50);
      Point point2 = Point(100,25);
      Point point3 = Point(200,5);
      Point point4 = Point(250,50);
      Point point5 = Point(300,100);
      Point point6 = Point(350,200);
      Point point7 = Point(250,250);
      array<Point>^ curvePoints = {point1,point2,point3,point4,point5,point6,point7};

      // Draw lines between original points to screen.
      e->Graphics->DrawLines( redPen, curvePoints );

      // Draw curve to screen.
      e->Graphics->DrawCurve( greenPen, curvePoints );
   }

private void DrawCurvePoint(PaintEventArgs e)
{

    // Create pens.
    Pen redPen = new Pen(Color.Red, 3);
    Pen greenPen = new Pen(Color.Green, 3);

    // Create points that define curve.
    Point point1 = new Point(50, 50);
    Point point2 = new Point(100, 25);
    Point point3 = new Point(200, 5);
    Point point4 = new Point(250, 50);
    Point point5 = new Point(300, 100);
    Point point6 = new Point(350, 200);
    Point point7 = new Point(250, 250);
    Point[] curvePoints = {point1, point2, point3, point4, point5, point6, point7};

    // Draw lines between original points to screen.
    e.Graphics.DrawLines(redPen, curvePoints);

    // Draw curve to screen.
    e.Graphics.DrawCurve(greenPen, curvePoints);
}

Private Sub DrawCurvePoint(ByVal e As PaintEventArgs)

    ' Create pens.
    Dim redPen As New Pen(Color.Red, 3)
    Dim greenPen As New Pen(Color.Green, 3)

    ' Create points that define curve.
    Dim point1 As New Point(50, 50)
    Dim point2 As New Point(100, 25)
    Dim point3 As New Point(200, 5)
    Dim point4 As New Point(250, 50)
    Dim point5 As New Point(300, 100)
    Dim point6 As New Point(350, 200)
    Dim point7 As New Point(250, 250)
    Dim curvePoints As Point() = {point1, point2, point3, point4, _
    point5, point6, point7}

    ' Draw lines between original points to screen.
    e.Graphics.DrawLines(redPen, curvePoints)

    ' Draw curve to screen.
    e.Graphics.DrawCurve(greenPen, curvePoints)
End Sub

Commenti

Questo metodo disegna una spline cardinale che passa attraverso ogni punto della matrice.

La matrice di punti deve contenere almeno tre strutture Point per disegnare una curva.

Questo metodo usa una tensione predefinita di 0,5.

Origine:

Graphics.cs

Origine:

Graphics.cs

public:
 void DrawCurve(System::Drawing::Pen ^ pen, ReadOnlySpan<System::Drawing::Point> points, float tension);

public void DrawCurve (System.Drawing.Pen pen, ReadOnlySpan<System.Drawing.Point> points, float tension);

member this.DrawCurve : System.Drawing.Pen * ReadOnlySpan<System.Drawing.Point> * single -> unit

Public Sub DrawCurve (pen As Pen, points As ReadOnlySpan(Of Point), tension As Single)

Parametri