Ледяные фракталы

program Ice1;

uses CRT, Graph;

var
	gd, gm: Integer;

procedure Draw(x, y, l, u : Real; t : Integer);

procedure Draw2(Var x, y: Real; l, u : Real; t : Integer);

begin
	Draw(x, y, l, u, t);
	x := x + l*cos(u);
	y := y - l*sin(u);
end;

begin
	if t > 0 then 
	begin
		l := l*0.5;
		Draw2(x, y, l, u, t-1);
		Draw2(x, y, l*0.8, u+pi/2, t-1);
		Draw2(x, y, l*0.8, u-pi/2, t-1);
		Draw2(x, y, l, u, t-1)
	end
	else 
		Line(Round(x), Round(y), Round(x+cos(u)*l), Round(y-sin(u)*l))
end;

begin
	gd := Detect;
	InitGraph(gd, gm, 'c:\bp\bgi');
	Draw(410, 10, 400, -pi, 5);
	Draw(10, 410, 400, 0, 5);
	Draw(10, 10, 400, -pi/2, 5);
	Draw(410, 410, 400, pi/2, 5);
	ReadKey;             
	CloseGraph
end.

program Ice2;

uses CRT, Graph;

var
	gd, gm: Integer;

procedure Draw(x, y, l, u : Real; t : Integer);

procedure Draw2(Var x, y: Real; l, u : Real; t : Integer);

begin
	Draw(x, y, l, u, t);
	x := x + l*cos(u);
	y := y - l*sin(u);
end;

begin
	if t > 0 then 
	begin
		l := l*0.5;
		Draw2(x, y, l, u, t-1);
		Draw2(x, y, l*0.45, u+2*pi/3, t-1);
		Draw2(x, y, l*0.45, u-pi/3, t-1);
		Draw2(x, y, l*0.45, u+pi/3, t-1);
		Draw2(x, y, l*0.45, u-2*pi/3, t-1);
		Draw2(x, y, l, u, t-1)
	end
	else 
		Line(Round(x), Round(y), Round(x+cos(u)*l), Round(y-sin(u)*l))
end;

begin
	gd := Detect;
	InitGraph(gd, gm, 'c:\bp\bgi');
	Draw(210, 8, 400, -2*pi/3, 3);
	Draw(10, 354, 400, 0, 3);
	Draw(410, 354, 400, 2*pi/3, 3);
	ReadKey;              
	CloseGraph
end.

Смотрите также:

• резаный квадрат.

Ссылки:

• Ice Fractal .