Graphics::DrawCurve Method (Pen, array<Point>)
Draws a cardinal spline through a specified array of Point structures.
Assembly: System.Drawing (in System.Drawing.dll)
Parameters
- pen
- Type: System.Drawing::Pen
Pen that determines the color, width, and height of the curve.
- points
- Type: array<System.Drawing::Point>
Array of Point structures that define the spline.
| Exception | Condition |
|---|---|
| ArgumentNullException | pen is nullptr. -or- points is nullptr. |
This method draws a cardinal spline that passes through each point in the array.
The array of points must contain at least three Point structures for a curve to be drawn.
This method uses a default tension of 0.5.
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 red and green pens.
Creates seven points to define a curve.
Draws six red straight lines between the seven points to form an incomplete polygon.
Draws an open green curve through the seven points.
The method uses a default tension of 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 ); }
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.