Old but still great code

I decided to resurrect some old 3D dot rotation code (1993). It was in C so I converted it to C# (not a big stretch) and it works pretty good. The key was double buffering.

Right now I am working on a whole 'font' that will allow me to rotate just about any string.

(these are predefined elsewhere but thought I would include them so you could see how the are created)
offScreenBmp = new Bitmap(this.Width, this.Height);
offScreenDC = Graphics.FromImage(offScreenBmp);
backBrush = new SolidBrush(Color.Lime); // i set the form transparency key to this
this.TopMost = true;

the 'display' code looks like this (I will be cleaning it up later):

private void DoDotAnimation()
{
while (! ClosingIt)
{
MoveDots(); // never guess what this does...
Graphics clientDC = this.CreateGraphics();

offScreenDC.FillRectangle(backBrush, 0, 0, this.Width, this.Height);

Color newColor = System.Drawing.Color.Red;

for (i = 0; i < PointsN; i++) // run through the dots array and draw them { if ((TheNewDots[i, 0] > -1) && (TheNewDots[i, 1] > -1))
offScreenDC.DrawEllipse(new Pen(newColor, 2), TheNewDots[i, 0], TheNewDots[i, 1], dotSize, dotSize);
}
clientDC.DrawImage(offScreenBmp, 0, 0);

Application.DoEvents();
}
}