/// <summary>
/// Рисование кривой Коха.
/// </summary>
/// <param name="target"> Где рисовать.</param>
private void KohLine(Graphics target)
{
SetupForElse();
Point start = new Point(pictureBox.Location.X + 100, pictureBox.Location.Y + pictureBox.Size.Height / 2);
Point end = new Point(pictureBox.Location.X + pictureBox.Size.Width - 100, pictureBox.Location.Y + pictureBox.Size.Height / 2);
Point middle = new Point((start.X + end.X) / 2, (start.Y + end.Y) / 2);
start = new Point((start.X - middle.X) * delta + middle.X, (start.Y - middle.Y) * delta + middle.Y);
start.X += current.X;
start.Y += current.Y;
end = new Point((end.X - middle.X) * delta + middle.X, (end.Y - middle.Y) * delta + middle.Y);
end.X += current.X;
end.Y += current.Y;
Koh fractKoh = new Koh(start, end);
fractKoh.Refresh(recur, target);
}
/// <summary>
/// Функция для отрисовки прямой.
/// </summary>
/// <param name="depth"> Глубина рекурсии.</param>
/// <param name="target"> Где рисовать.</param>
public override void Refresh(int depth, Graphics target)
{
Draw(target, this);
if (depth <= maxRecur)
{
if (depth > 0)
{
// Считаем вершину треугольника, закрашиваем центр и рекурсино вызываем от двух каждых соседних вершин.
Point firstThird = new Point((2 * start.X + end.X) / 3, (2 * start.Y + end.Y) / 3);
Point secondThird = new Point((start.X + 2 * end.X) / 3, (start.Y + 2 * end.Y) / 3);
target.DrawLine(new Pen(Color.White, 4), firstThird, secondThird);
Point newDot = new Point(Convert.ToInt32((secondThird.X - firstThird.X) * Math.Cos(-Math.PI / 3) - (secondThird.Y - firstThird.Y) * Math.Sin(-Math.PI / 3) + firstThird.X), Convert.ToInt32((secondThird.X - firstThird.X) * Math.Sin(-Math.PI / 3) + (secondThird.Y - firstThird.Y) * Math.Cos(-Math.PI / 3) + firstThird.Y));
var first = new Koh(start, firstThird);
var second = new Koh(firstThird, newDot);
var third = new Koh(newDot, secondThird);
var fourth = new Koh(secondThird, end);
first.Refresh(depth - 1, target);
second.Refresh(depth - 1, target);
third.Refresh(depth - 1, target);
fourth.Refresh(depth - 1, target);
}
}
}