private void Recursion(IGraphics2DContext context, Point p1, Point p2, Point p3, int level)
{
if (level > 0)
{
Point p1n = new Point((p1.X + p2.X) / 2, (p1.Y + p2.Y) / 2);
Point p2n = new Point((p2.X + p3.X) / 2, (p2.Y + p3.Y) / 2);
Point p3n = new Point((p3.X + p1.X) / 2, (p3.Y + p1.Y) / 2);
Color color = _color ?? Color.Random();
context.DrawLine(p1, p2, color);
context.DrawLine(p2, p3, color);
context.DrawLine(p3, p1, color);
Recursion(context, p1, p1n, p3n, level - 1);
Recursion(context, p2, p1n, p2n, level - 1);
Recursion(context, p3, p2n, p3n, level - 1);
}
}
private Rectangle RenderOrCalcMeasure(IGraphics2DContext context,
string generator, double angle, double initAngle,
Point loc, double step, bool render = true)
{
Stack <State> states = new Stack <State>();
State state;
double x = loc.X;
double y = loc.Y;
double xn;
double yn;
double xmin = x;
double ymin = y;
double xmax = x;
double ymax = y;
double currAngle = initAngle;
foreach (char c in generator)
{
switch (c)
{
case '+':
currAngle += angle;
break;
case '-':
currAngle -= angle;
break;
case '[':
states.Push(new State(currAngle, x, y));
break;
case ']':
state = states.Pop();
currAngle = state.Angle;
x = state.X;
y = state.Y;
break;
case 'f':
case 'F':
xn = x + step * Math.Cos(currAngle * Math.PI / 180);
yn = y + step * Math.Sin(currAngle * Math.PI / 180);
if (c == 'F' && render)
{
context.DrawLine(x, y, xn, yn, Color);
}
x = xn; y = yn;
if (x > xmax)
{
xmax = x;
}
if (x < xmin)
{
xmin = x;
}
if (y > ymax)
{
ymax = y;
}
if (y < ymin)
{
ymin = y;
}
break;
default:
break;
}
}
return(new Rectangle(xmin, ymin, xmax - xmin, ymax - ymin));
}