/// <summary>
/// Render fractal.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void pictureBox_Paint(object sender, PaintEventArgs e)
{
// Update fractal.
fractal.X = x;
fractal.Y = y;
if (fractal is DragonsCurve)
{
DragonsCurve dc = fractal as DragonsCurve;
dc.lastX = x + length * scale / 2;
dc.lastY = y + length * scale / 2;
}
fractal.Length = length * scale;
// Prepare for rendering.
Graphics g = e.Graphics;
Pen background = new Pen(Color.FromArgb(35, 35, 35));
g.FillRectangle(background.Brush, new Rectangle(0, 0, pictureBox.Width, pictureBox.Height));
// Update color buttons.
colorButton1.FlatAppearance.BorderColor = Fractal.startColor;
colorButton2.FlatAppearance.BorderColor = Fractal.endColor;
// Render fractal.
try
{
fractal.Render(e.Graphics);
}
catch
{
MessageBox.Show("Поздравляем, у вас exception! Отрисовка невозможна. Уменьшите глубину рекурсии.");
}
}
/// <summary>
/// Render pythagoras tree.
/// </summary>
/// <param name="target"> Target of the rendering. </param>
public override void Render(Graphics target)
{
Pen pen = new Pen(GetColor());
// Render next recursion level.
if (depth < MaxDepth)
{
// Calculate new coordinates.
int newLastX = (X + lastX) / 2 + (lastY - Y) / 2;
int newLastY = (Y + lastY) / 2 - (lastX - X) / 2;
DragonsCurve dc1 =
new DragonsCurve(depth + 1, MaxDepth, Length, X, Y, newLastX, newLastY);
DragonsCurve dc2 =
new DragonsCurve(depth + 1, MaxDepth, Length, lastX, lastY, newLastX, newLastY);
dc1.Render(target);
dc2.Render(target);
}
else
{
// Render last level of recursion.
target.DrawLine(pen, X, Y, lastX, lastY);
}
}