//+(-) - поворот по (против) часовой стрелке на угол
//F,G,D - рисуют прямую
public Bitmap DrawFractal(string fractal, double direction, double angle, int length, Bitmap bm)
{
if (fractal == null)
{
return(bm);
}
MyPoint p1 = new MyPoint(bm.Width / 2, bm.Height / 2);
MyPoint p2 = new MyPoint(bm.Width / 2, bm.Height / 2 - length);
Stack <KeyValuePair <MyPoint, double> > s = new Stack <KeyValuePair <MyPoint, double> >();
for (int i = 0; i < fractal.Length; ++i)
{
if (fractal[i] == '+')
{
direction += angle;
}
if (fractal[i] == '-')
{
direction -= angle;
}
if (fractal[i] == 'F' || fractal[i] == 'G' || fractal[i] == 'D')
{
p2.RotationPoint(p1, direction);
if (0 < p1.X && 0 < p1.Y && 0 < p2.X && 0 < p2.Y && bm.Width > p1.X && bm.Height > p1.Y && bm.Width > p2.X && bm.Height > p2.Y)
{
bm = MyEdge.DrawEdge(bm, p1, p2);
}
p1 = p2;
p2 = new MyPoint(p1.X, p1.Y - length);
}
if (fractal[i] == '[')
{
s.Push(new KeyValuePair <MyPoint, double>(p1, direction));
}
if (fractal[i] == ']')
{
p1 = s.Peek().Key;
direction = s.Pop().Value;
p2 = new MyPoint(p1.X, p1.Y - length);
}
}
return(bm);
}
public void RotationEdge(MyPoint p, double rotation)
{
p1.RotationPoint(p, rotation);
p2.RotationPoint(p, rotation);
}
