Graphics::DrawCurve(constPen*,constPointF*,INT) method (gdiplusgraphics.h)

The Graphics::DrawCurve method draws a cardinal spline.

Syntax

Status DrawCurve(
  const Pen    *pen,
  const PointF *points,
  INT          count
);

Parameters

pen

Pointer to a pen used to draw the cardinal spline.

points

Pointer to an array of PointF objects that specify the coordinates that the cardinal spline passes through.

count

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

Return value

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

A segment is defined as a curve that connects two consecutive points in the cardinal spline. The ending point of each segment is the starting point for the next.

Examples

The following example draws a cardinal spline.

VOID Example_DrawCurve4(HDC hdc)
{
   Graphics graphics(hdc);

   // Define a Pen object and an array of Point objects.
   Pen greenPen(Color::Green, 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 curvePoints[4] = {
   point1,
   point2,
   point3,
   point4};

   PointF* pcurvePoints = curvePoints;

   // Draw the curve.
   graphics.DrawCurve(&greenPen, curvePoints, 4);

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

Requirements

See also

Cardinal Splines

DrawClosedCurve Methods

Drawing Cardinal Splines

Graphics

Pen

PointF