Graphics.DrawClosedCurve(const Pen*, const PointF*, INT) method

Applies to: desktop apps only

The Graphics::DrawClosedCurve method draws a closed cardinal spline.

Syntax

Status DrawClosedCurve(
  [in]  const Pen *pen,
  [in]  const PointF *points,
  [in]  INT count
);

Parameters

• pen [in]
  Type: const Pen*

  Pointer to a pen that is used to draw the closed cardinal spline.

• points [in]
  Type: const PointF*

  Pointer to an array of PointF objects that specify the coordinates of the closed cardinal spline. The array of PointF objects must contain a minimum of three elements.

• count [in]
  Type: INT

  Integer that specifies the number of elements in the points array.

Return value

Type:

Type: Status****

If the method succeeds, it returns Ok, which is an element of the Status enumeration.

If the method fails, it returns one of the other elements of the Status enumeration.

Remarks

Each ending point is the starting point for the next cardinal spline. In a closed cardinal spline, the curve continues through the last point in the points array and connects with the first point in the array.

Examples

The following example draws a closed cardinal spline.

VOID Example_DrawClosedCurve3(HDC hdc)
{
   Graphics graphics(hdc);

   // Define a Pen object and an array of PointF objects.
   Pen greenPen(Color(255, 0, 0, 255), 3);
   PointF point1(100.0f, 100.0f);
   PointF point2(200.0f, 50.0f);
   PointF point3(400.0f, 10.0f);
   PointF point4(500.0f, 100.0f);
   PointF point5(600.0f, 200.0f);
   PointF point6(700.0f, 400.0f);
   PointF point7(500.0f, 500.0f);

   PointF curvePoints[7] = {
      point1,
      point2,
      point3,
      point4,
      point5,
      point6,
      point7};

   // Draw the closed curve.
   graphics.DrawClosedCurve(&greenPen, curvePoints, 7);

   // Draw the points in the curve.
   SolidBrush redBrush(Color(255, 255, 0, 0));
   graphics.FillEllipse(&redBrush, Rect(95, 95, 10, 10));
   graphics.FillEllipse(&redBrush, Rect(495, 95, 10, 10));
   graphics.FillEllipse(&redBrush, Rect(495, 495, 10, 10));
   graphics.FillEllipse(&redBrush, Rect(195, 45, 10, 10));
   graphics.FillEllipse(&redBrush, Rect(395, 5, 10, 10));
   graphics.FillEllipse(&redBrush, Rect(595, 195, 10, 10));
   graphics.FillEllipse(&redBrush, Rect(695, 395, 10, 10));
}

Requirements

Minimum supported client	Windows XP, Windows 2000 Professional
Minimum supported server	Windows 2000 Server
Product	GDI+ 1.0
Header	Gdiplusgraphics.h (include Gdiplus.h)
Library	Gdiplus.lib
DLL	Gdiplus.dll

See also

Graphics

DrawCurve Methods

FillClosedCurve Methods

Pen

PointF

Drawing Cardinal Splines

Cardinal Splines

 

 

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Build date: 3/6/2012