/// <summary>
/// Draws Koch Curve
/// </summary>
/// <param name="flag">refresh image in imageBox</param>
private void DrowKochCurve(bool flag = true)
{
Console.WriteLine("Redraw");
Console.WriteLine("Size is ");
Console.WriteLine(picCanvas.Width + " " + picCanvas.Height);
Console.WriteLine(this.Width.ToString() + " " + this.Height.ToString());
//mBm = new Bitmap(this.ClientSize.Width, this.ClientSize.Height);
double width = this.picCanvas.Width;
double height = this.picCanvas.Height;
double len = Math.Min((height - 20) * 2 / Math.Sqrt(3), (width - 20) / 3);
Console.WriteLine($"Len is {len}");
lastImage = new Bitmap((int)(width * Fractal.imageQualityFactor), (int)(height * Fractal.imageQualityFactor));
Point startPoint = new Point((width - 3 * len) / 2, height / 2 + len / 4 * Math.Sqrt(3));
Point endPoint = new Point(width - (width - 3 * len) / 2, startPoint.Y);
Console.WriteLine(startPoint);
Console.WriteLine(endPoint);
KochCurve curve = new KochCurve(0, startColor, endColor, (int)iterationsUpDown.Value);
curve.Draw(lastImage, startPoint, endPoint);
if (flag)
{
(picCanvas.Image)?.Dispose();
picCanvas.Image = lastImage;
}
}
/// <summary>
/// Draws Koch Curve fractal
/// </summary>
/// <param name="image"></param>
/// <param name="A"></param>
/// <param name="E"></param>
/// <param name="helper"></param>
public override void Draw(Bitmap image, Point A, Point E, int helper = 0)
{
/* C
* A__B/\D__E
*/
if (CurDepth == MaxDepth)
{
Pen gradientPen = new Pen(Fractal.GetGradientColor(StartColor, EndColor, helper, MaxDepth),
(float)(startThickness));
using (var graphics = Graphics.FromImage(image))
{
var offA = (A - offsetPoint) * imageQualityFactor;
var offE = (E - offsetPoint) * imageQualityFactor;
graphics.DrawLine(gradientPen, (float)offA.X, (float)offA.Y, (float)offE.X, (float)offE.Y);
}
}
else
{
Point B = A + (E - A) / 3;
Point D = A + (E - A) * (2.0 / 3);
Point temp = D - B;
temp = Point.Rotate(temp, -Math.PI / 3);
Point C = B + temp;
Point[] arr = new Point[5] {
A, B, C, D, E
};
for (int i = 0; i < 4; ++i)
{
var newFractal = new KochCurve(StartLen, StartColor, EndColor, MaxDepth, CurDepth + 1);
int newHelper = helper;
if (i == 1 || i == 2)
{
newHelper++;
}
newFractal.Draw(image, arr[i], arr[i + 1], newHelper);
}
}
}
