public Image DrawInitialGraph(Size size)
{
GC.Collect();
AreaSize = size;
Frames = new Stack <RGFrame>();
Image res = new Bitmap(size.Width, size.Height);
var gr = Graphics.FromImage(res);
gr.FillRectangle(_whiteBrush, 0, 0, size.Width, size.Height);
var radius = Math.Min(size.Width, size.Height) / 2.0f;
radius = radius * 0.9f;
var centerX = (float)(size.Width / (RGCircleRadius * 2));
var centerY = (float)(size.Height / (RGCircleRadius * 2));
AreaCenter = new PointF(centerX, centerY);
CircleRect = new RectangleF(centerX - radius, centerY - radius, radius * 2, radius * 2);
gr.FillEllipse(_yellowBrush, CircleRect);
AddRGFeatures(res as Bitmap);
gr.DrawLine(_blackPen, 0, centerY, size.Width, centerY);
gr.DrawLine(_blackPen, centerX, 0, centerX, size.Height);
gr.Save();
var onePixelWeight = (float)(RGCircleRadius / radius);
var xLen = size.Width * onePixelWeight;
var yLen = size.Height * onePixelWeight;
var x1 = -xLen / 2;
var y1 = -yLen / 2;
Frame = new RGFrame {
Image = res, PlainRect = new RectangleF(x1, y1, xLen, yLen)
};
Frames.Push(Frame);
return(res);
}
public void ZoomIn(Rectangle selectedArea)
{
var areaRange = (AreaSize.Width * 1.0 / AreaSize.Height);
var rectRange = (selectedArea.Width * 1.0 / selectedArea.Height);
if (rectRange > 1)
{
if (areaRange > rectRange)
{
selectedArea.Width = (int)(selectedArea.Width * areaRange);
}
else
{
selectedArea.Width = (int)(selectedArea.Width / areaRange);
}
}
else
{
if (areaRange < rectRange)
{
selectedArea.Height = (int)(selectedArea.Height / areaRange);
}
else
{
selectedArea.Height = (int)(selectedArea.Height * areaRange);
}
}
var onePixelXWidth = Frame.PlainRect.Width / AreaSize.Width;
var onePixelYWidth = Frame.PlainRect.Height / AreaSize.Height;
var xl = Frame.PlainRect.X + selectedArea.X * onePixelXWidth;
var xW = selectedArea.Width * onePixelXWidth;
var yd = selectedArea.Y * onePixelYWidth + selectedArea.Height * onePixelYWidth;
var yl = Frame.PlainRect.Y + Frame.PlainRect.Height - yd;
var yW = selectedArea.Height * onePixelYWidth;
var frame = new RGFrame {
PlainRect = new RectangleF(xl, yl, xW, yW)
};
var image = new Bitmap(AreaSize.Width, AreaSize.Height);
var accuracyX = frame.PlainRect.Width / AreaSize.Width;
var accuracyY = frame.PlainRect.Height / AreaSize.Height;
var i = 0;
for (var c1 = frame.PlainRect.X; c1 <= frame.PlainRect.X + frame.PlainRect.Width; c1 += accuracyX)
{
var j = AreaSize.Height - 1;
for (var c2 = frame.PlainRect.Y; c2 <= frame.PlainRect.Y + frame.PlainRect.Height; c2 += accuracyY)
{
if (i < 0 || j < 0 || i >= AreaSize.Width || j >= AreaSize.Height)
{
continue;
}
if ((c1 * c1 + c2 * c2) > 1)
{
image.SetPixel(i, j, Color.White);
}
else
{
image.SetPixel(i, j, Color.Yellow);
var c0 = (float)Math.Sqrt(RGCircleRadius - c1 * c1 - c2 * c2);
var cPoint = new CPoint {
C0 = c0, C1 = c1, C2 = c2
};
var rgPoint = cPoint.RGPoint;
if (rgPoint.G < 0)
{
image.SetPixel(i, j, Color.Green);
}
if (Math.Abs(c1 - 0) < Epsilon || Math.Abs(c2 - 0) < Epsilon)
{
image.SetPixel(i, j, Color.Black);
}
}
j--;
}
i++;
}
frame.Image = image;
Frame = frame;
Frames.Push(frame);
}