How to draw line of ten thousands of points with WPF within 0.5 second?

Question

I am writing WPF code to show a real-time plot which is a connected line containing about 10,000 points. It takes about 5 seconds to show a picture in my computer. Does anyo

Answer 1

I guess the code sample is 1) a test to try a something that isn't really the sample or 2) a homework.

Try to override the OnRender and do something like:

Pen drawingPen = new Pen(Brushes.Black, 1);

protected override void OnRender(DrawingContext dc)
{
    dc.DrawRectangle(Background, null, new Rect(RenderSize));


            double x=rand.Next(300);
            double y = rand.Next(300);
            for (double i = 0; i < 1000; i = i + 0.1)
            {
                y = 100 + rand.Next(100);
                dc.DrawLine(drawingPen, new Point(i, x), new Point(i + 1, y));
                x = y;
            }


}

or for something with real data, consider if you really need to show every point depending on the resolution of the visual context. ( If your scale is 0-10 and you are producing points 0.0001,0.00015 are they really gone differ on your scale)