Understanding PDFPath - Pen does not Pick Up?

[scotthclearspaninc]

I've been working with the drawing tools of Free Spire.PDF. Using this code from the tutorial:

Code: Select all

PointF[] points = new PointF[5];
for (int i = 0; i < points.Length; i++)
{
    float x = (float)Math.Cos(i * 2 * Math.PI / 5);
    float y = (float)Math.Sin(i * 2 * Math.PI / 5);
    points[i] = new PointF(x, y);
}
PdfPath path = new PdfPath();
path.AddLine(points[2], points[0]);
path.AddLine(points[0], points[3]);
path.AddLine(points[3], points[1]);
path.AddLine(points[1], points[4]);
path.AddLine(points[4], points[2]);


which generates this star nicely:

TutorialStar.PNG

However if I modify the code so that the lines are not drawn in sequence:

Code: Select all

PointF[] points = new PointF[5];
for (int i = 0; i < points.Length; i++)
{
    float x = (float)Math.Cos(i * 2 * Math.PI / 5);
    float y = (float)Math.Sin(i * 2 * Math.PI / 5);
    points[i] = new PointF(x, y);
}
PdfPath path = new PdfPath();
path.AddLine(points[2], points[0]);
path.AddLine(points[4], points[2]);
path.AddLine(points[0], points[3]);
path.AddLine(points[3], points[1]);
path.AddLine(points[1], points[4]);


I get the following result:

TutorialStarRearranged.PNG

It is as if PDFPath requires the lines to be added in order, and that it draws without picking up the pen. Is this a correct understanding? Is there a way to avoid this so that I can add the lines in any order/not have to sort them? Thanks in advance.

[sweety1]

Hello,

Thanks for your inquiry.
Your understanding is correct. If you want to avoid this. Please refer to the below method to draw the lines.

Code: Select all

page.Canvas.DrawLine(pen, points[2], points[0]);

Best Regards,
Sweety

E-iceblue support team