Graphics.DrawBeziers Method (Pen, PointF[]) (System.Drawing)

DrawBeziers Method (Pen, PointF[])

.NET Framework Class Library

Graphics..::.DrawBeziers Method (Pen, array<PointF>[]()[])

Draws a series of Bézier splines from an array of PointF structures.

Namespace: System.Drawing
Assembly: System.Drawing (in System.Drawing.dll)

Syntax

Visual Basic (Declaration)

Public Sub DrawBeziers ( _
    pen As Pen, _
    points As PointF() _
)

Visual Basic (Usage)

Dim instance As Graphics
Dim pen As Pen
Dim points As PointF()

instance.DrawBeziers(pen, points)

public void DrawBeziers(
    Pen pen,
    PointF[] points
)

Visual C++

public:
void DrawBeziers(
    Pen^ pen, 
    array<PointF>^ points
)

JScript

public function DrawBeziers(
    pen : Pen, 
    points : PointF[]
)

Parameters

pen: Type: System.Drawing..::.Pen
Pen that determines the color, width, and style of the curve.

points: Type: array<System.Drawing..::.PointF>[]()[]
Array of PointF structures that represent the points that determine the curve.

Exceptions

Exception	Condition
ArgumentNullException	pen is nullNothingnullptra null reference (Nothing in Visual Basic). -or- points is nullNothingnullptra null reference (Nothing in Visual Basic).

Exception

Condition

ArgumentNullException

pen is nullNothingnullptra null reference (Nothing in Visual Basic).

-or-

points is nullNothingnullptra null reference (Nothing in Visual Basic).

Remarks

The first Bézier curve is drawn from the first point to the fourth point in the point array. The second and third points are control points that determine the shape of the curve. Each subsequent curve needs exactly three more points: two more control points and an ending point. The ending point of the previous curve is used as the starting point for each additional curve.

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 black pen.
Creates the start, end, and two control points for a first curve and endpoint and two control points for a second curve.
Draws the successive Bézier curves to the screen.

Visual Basic

Private Sub DrawBeziersPointF(ByVal e As PaintEventArgs)

    ' Create pen.
    Dim blackPen As New Pen(Color.Black, 3)

    ' Create points for curve.
    Dim start As New PointF(100.0F, 100.0F)
    Dim control1 As New PointF(200.0F, 10.0F)
    Dim control2 As New PointF(350.0F, 50.0F)
    Dim end1 As New PointF(500.0F, 100.0F)
    Dim control3 As New PointF(600.0F, 150.0F)
    Dim control4 As New PointF(650.0F, 250.0F)
    Dim end2 As New PointF(500.0F, 300.0F)
    Dim bezierPoints As PointF() = {start, control1, control2, _
    end1, control3, control4, end2}

    ' Draw arc to screen.
    e.Graphics.DrawBeziers(blackPen, bezierPoints)
End Sub

private void DrawBeziersPointF(PaintEventArgs e)
{
    // Create pen.
    Pen blackPen = new Pen(Color.Black, 3);

    // Create points for curve.
    PointF start = new PointF(100.0F, 100.0F);
    PointF control1 = new PointF(200.0F, 10.0F);
    PointF control2 = new PointF(350.0F, 50.0F);
    PointF end1 = new PointF(500.0F, 100.0F);
    PointF control3 = new PointF(600.0F, 150.0F);
    PointF control4 = new PointF(650.0F, 250.0F);
    PointF end2 = new PointF(500.0F, 300.0F);
    PointF[] bezierPoints = { start, control1, control2, end1,
         control3, control4, end2 };      

    // Draw arc to screen.
    e.Graphics.DrawBeziers(blackPen, bezierPoints);
}

Visual C++

private:
   void DrawBeziersPointF( PaintEventArgs^ e )
   {
      // Create pen.
      Pen^ blackPen = gcnew Pen( Color::Black,3.0f );

      // Create points for curve.
      PointF start = PointF(100.0F,100.0F);
      PointF control1 = PointF(200.0F,10.0F);
      PointF control2 = PointF(350.0F,50.0F);
      PointF end1 = PointF(500.0F,100.0F);
      PointF control3 = PointF(600.0F,150.0F);
      PointF control4 = PointF(650.0F,250.0F);
      PointF end2 = PointF(500.0F,300.0F);
      array<PointF>^ bezierPoints = {start,control1,control2,end1,control3,control4,end2};

      // Draw arc to screen.
      e->Graphics->DrawBeziers( blackPen, bezierPoints );
   }

Platforms

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Version Information

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

Reference

Graphics Class

Graphics Members

DrawBeziers Overload

System.Drawing Namespace