Graphics::DrawBeziers(constPen*,constPointF*,INT) method (gdiplusgraphics.h)
The Graphics::DrawBeziers method draws a sequence of connected Bézier splines.
Syntax
Status DrawBeziers(
const Pen *pen,
const PointF *points,
INT count
);
Parameters
pen
Pointer to a pen that is used to draw the Bézier splines.
points
Pointer to an array of PointF objects that specify the starting, ending, and control points of the Bézier splines.
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 Bézier spline does not pass through its control points. The control points act as magnets, pulling the curve in certain directions to influence the way a Bézier spline bends. Each Bézier spline requires a starting point and an ending point. Each ending point is the starting point for the next Bézier spline.
Examples
The following example draws a pair of Bézier curves.
VOID Example_DrawBeziers2(HDC hdc)
{
Graphics graphics(hdc);
// Define a Pen object and an array of PointF objects.
Pen greenPen(Color(255, 0, 255, 0), 3);
PointF startPoint(100.0f, 100.0f);
PointF ctrlPoint1(200.0f, 50.0f);
PointF ctrlPoint2(400.0f, 10.0f);
PointF endPoint1(500.0f, 100.0f);
PointF ctrlPoint3(600.0f, 200.0f);
PointF ctrlPoint4(700.0f, 400.0f);
PointF endPoint2(500.0f, 500.0f);
PointF curvePoints[7] = {
startPoint,
ctrlPoint1,
ctrlPoint2,
endPoint1,
ctrlPoint3,
ctrlPoint4,
endPoint2};
// Draw the Bezier curves.
graphics.DrawBeziers(&greenPen, curvePoints, 7);
// Draw the control and end points.
SolidBrush redBrush(Color(255, 255, 0, 0));
graphics.FillEllipse(&redBrush, Rect(100 - 5, 100 - 5, 10, 10));
graphics.FillEllipse(&redBrush, Rect(500 - 5, 100 - 5, 10, 10));
graphics.FillEllipse(&redBrush, Rect(500 - 5, 500 - 5, 10, 10));
SolidBrush blueBrush(Color(255, 0, 0, 255));
graphics.FillEllipse(&blueBrush, Rect(200 - 5, 50 - 5, 10, 10));
graphics.FillEllipse(&blueBrush, Rect(400 - 5, 10 - 5, 10, 10));
graphics.FillEllipse(&blueBrush, Rect(600 - 5, 200 - 5, 10, 10));
graphics.FillEllipse(&blueBrush, Rect(700 - 5, 400 - 5, 10, 10));
}
Requirements
| Requirement | Value |
|---|---|
| Header | gdiplusgraphics.h |