#include "library.h"

// version 1: we say through a parameter how fancy the line
// is supposed to be. When the fanciness is zero, a simple
// straight line is drawn.

void draw_line1(double len, int fanciness)
{ if (fanciness == 0)
    draw_distance(len);
  else
  { draw_line1(len/3, fanciness-1);
    turn_left_by_degrees(80);
    draw_line1(len/3*1.3, fanciness-1);
    turn_right_by_degrees(160);
    draw_line1(len/3*1.3, fanciness-1);
    turn_left_by_degrees(80);
    draw_line1(len/3, fanciness-1); } }

// version 2: this automatically gets as fancy as the display
// resolution can handle. Once the distance to be covered is
// significantly less that one pixel, no detail is going to
// be visible.

void draw_line2(double len)
{ if (len < 0.5)
    draw_distance(len);
  else
  { draw_line2(len/3);
    turn_left_by_degrees(60);
    draw_line2(len/3);
    turn_right_by_degrees(120);
    draw_line2(len/3);
    turn_left_by_degrees(60);
    draw_line2(len/3); } }
    
void draw_tri(double len, int f)
{ draw_line1(len, f);
  turn_right_by_degrees(120);
  draw_line1(len, f);
  turn_right_by_degrees(120);
  draw_line1(len, f);
  turn_right_by_degrees(120);

void test()
{ const int f = read_int();
  set_pen_color(color::white);
  fill_rectangle(0, 0, 600, 600);
  set_pen_color(color::red);
  move_to(100, 420);
  set_heading_degrees(30);
  draw_tri(400.0, f);
  new_line();
  test(); }

void main()
{ make_window(600, 600);
  set_pen_width(1);
  test(); }