// - - - - - - - - - - - - - - - - - - - - - - - -
public static void Init(this PictureBox pb)
{
GUI.pb = pb;
xoffset = yoffset = pointsize / 2;
width = pb.Width - pointsize;
height = pb.Height - pointsize;
b = new Bitmap(width + pointsize, height + pointsize);
g = Graphics.FromImage(b);
pb.Clear();
pb.Image = b;
}
