dragon

Author: furas

turtle/jurasic-park-dragon-curve/README.md

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+
+# main.py level:8, false, width:10
+
+![#1](imgs/main-1-level_8_false_width_10.png?raw=true)
+
+# main.py level:8, true, width:10
+
+![#1](imgs/main-1-level_8_true_width_10.png?raw=true)
+
+# main.py level:10, false, width:5
+
+![#1](imgs/main-1-level_10_false_width_5.png?raw=true)

turtle/jurasic-park-dragon-curve/imgs/main-1-level_10_false_width_5.png

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+#!/usr/bin/env python3
+
+# https://en.wikipedia.org/wiki/Dragon_curve
+# https://en.wikipedia.org/wiki/L-system
+
+# https://pl.wikipedia.org/wiki/Smok_Heighwaya
+# https://pl.wikipedia.org/wiki/L-system
+
+# https://en.wikipedia.org/wiki/Sierpinski_triangle
+
+import turtle
+
+# --- functions ---
+
+def dragon(level=1, remove_plus_minus=False, width=5):
+
+    a = 'FX'
+
+    rule = {
+        'X': 'X+YF+',
+        'Y': '-FX-Y',
+        '-': '-',
+        '+': '+',
+        'F': 'F',
+    }
+
+    for _ in range(level):
+        a = ''.join(rule[x] for x in a)
+
+    print('len:', len(a))
+
+    a = a.replace('X', '').replace('Y','')
+    print('len without X, Y:', len(a))
+    
+    if remove_plus_minus:
+        a = a.replace('+-', '').replace('-+', '')
+        print('len without -+, +-:', len(a))
+            
+    for x in a:
+        if x == 'F':
+            turtle.forward(width)
+        elif x == '+':        
+            turtle.right(90)
+            turtle.color('red')
+        elif x == '-':
+            turtle.left(90)
+            turtle.color('green')
+
+    print('OK')
+    
+# --- main ---
+
+# clear everything
+turtle.reset()
+
+# the fastest turtle
+turtle.speed(0)
+
+# hide turtle
+turtle.hideturtle()
+
+
+dragon(10, False, 10)
+
+
+# keep open window
+turtle.exitonclick()

turtle/jurasic-park-dragon-curve/imgs/main-1-level_8_false_width_10.png

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+#!/usr/bin/env python
+
+# https://studio.code.org/c/35859693/edit
+
+import turtle
+
+# --- functions ---
+
+def draw_1(length, level):
+    if level < 1:
+        turtle.fd(length)
+    else:
+        length = length/3
+        
+        draw_1(length, level-1)
+        turtle.left(90)
+        draw_1(length, level-1)
+        turtle.right(90)
+        draw_1(length, level-1)
+        turtle.right(90)
+        draw_1(length, level-1)
+        turtle.left(90)
+        draw_1(length, level-1)
+
+def draw_2(length, level):
+    if level < 1:
+        turtle.fd(length)
+    else:
+        length = length/3
+        
+        draw_2(length, level-1)
+        turtle.left(60)
+        draw_2(length, level-1)
+        turtle.right(180-60)
+        draw_2(length, level-1)
+        turtle.left(60)
+        draw_2(length, level-1)
+
+def turn_left(width, step, draw):
+    for _ in range(4):
+        draw(width, step)
+        turtle.left(90)
+
+def turn_right(width, step, draw):
+    for _ in range(4):
+        draw(width, step)
+        turtle.right(90)
+
+# --- main ---
+
+# clear everything
+turtle.reset()
+
+# the fastest turtle
+turtle.speed(0)
+
+
+
+turn_left(300, 3, draw_1)
+turtle.left(90)
+turn_right(300, 3, draw_1)
+
+
+
+# hide turtle
+turtle.hideturtle()
+
+# keep open window
+turtle.exitonclick()