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--- narzedzia:fraktale_python [2025/05/10 23:54] – administrator
+++ narzedzia:fraktale_python [2025/05/16 18:39] (aktualna) – administrator
@@ Linia 1: / Linia 1: @@
-====== Fraktale w pythonie ======
+====== PY: Fraktale w pythonie ======
 [[https://en.wikipedia.org/wiki/L-system|Wikipedia: L-systems]]
+{{::pythonw_dgrsk9lafw.gif|}}
+<code python fractal_ardugeek.py>
+import turtle
+import time
+# Configuration
+FONT = ("Arial", 48, "bold")
+LETTER_SPACING = 65
+ANIMATION_DELAY = 0.5  # seconds between drawing each letter
+FRACTAL_ITER = 2       # reduced iterations for faster drawing
+FRACTAL_SCALE = 10     # scaling factor for fractal drawing
+# L-system definitions for each letter (axiom, rules, angle)
+# 8 distinct fractals for 8 letters in "ArduGeek"
+L_SYSTEMS = [
+    ("F", {"F": "F+F--F+F"}, 60),                         # Koch curve
+    ("FX", {"X": "X+YF+", "Y": "-FX-Y"}, 90),        # Dragon curve
+    ("F-G-G", {"F": "F-G+F+G-F", "G": "GG"}, 120),    # Sierpinski triangle
+    ("X", {"X": "F-[[X]+X]+F[+FX]-X", "F": "FF"}, 25),# Fractal plant
+    ("A", {"A": "B-A-B", "B": "A+B+A"}, 60),         # Arrowhead curve
+    ("X", {"X": "X+YF++YF-FX--FXFX-YF+", "Y": "-FX+YFYF++YF+FX--FX-Y"}, 90), # Gosper curve
+    ("F+F+F+F", {"F": "F+F-F-F+F"}, 90),                 # Smaller square Koch variant
+    ("F", {"F": "F+F-F"}, 120) # Terdragon curve for an intricate, compact design
+]
+# Setup screen and turtles
+def setup():
+    screen = turtle.Screen()
+    screen.title("ArduGeek with Persistent Fractals")
+    screen.bgcolor("white")
+    pen = turtle.Turtle()
+    pen.hideturtle()
+    pen.penup()
+    pen.speed(1)
+    pen.color("darkblue")
+    fractal_t = turtle.Turtle()
+    fractal_t.hideturtle()
+    fractal_t.penup()
+    fractal_t.speed(0)
+    fractal_t.color("gray")
+    return screen, pen, fractal_t
+# Generate L-system string
+def generate_lsystem(axiom, rules, iterations):
+    s = axiom
+    for _ in range(iterations):
+        s = ''.join(rules.get(ch, ch) for ch in s)
+    return s
+# Draw L-system with given turtle
+def draw_lsystem(t, instructions, angle, scale):
+    for cmd in instructions:
+        if cmd in ('F', 'G'):
+            t.forward(scale)
+        elif cmd == '+':
+            t.right(angle)
+        elif cmd == '-':
+            t.left(angle)
+        elif cmd == '[':
+            stack.append((t.position(), t.heading()))
+        elif cmd == ']':
+            pos, head = stack.pop()
+            t.penup()
+            t.goto(pos)
+            t.setheading(head)
+            t.pendown()
+# Main animation: draw each fractal once, then write letters on top
+def animate_text_with_fractals(screen, pen, fractal_t, text):
+    # center the text on screen
+    total_width = len(text) * FONT[1] * 0.6 + (len(text)-1) * LETTER_SPACING
+    start_x = -total_width / 2
+    baseline_y = 0
+    pen.goto(start_x, baseline_y)
+    # draw persistent fractals behind each letter
+    for i, letter in enumerate(text):
+        axiom, rules, angle = L_SYSTEMS[i]
+        inst = generate_lsystem(axiom, rules, FRACTAL_ITER)
+        fractal_t.penup()
+        # align each fractal under its letter
+        fractal_t.goto(start_x + i*(FONT[1]*0.6 + LETTER_SPACING), baseline_y - FONT[1]*0.6)
+        fractal_t.setheading(90)  # align fern and others upright
+        fractal_t.pendown()
+        global stack
+        stack = []
+        draw_lsystem(fractal_t, inst, angle, FRACTAL_SCALE)
+        fractal_t.penup()
+    # write all letters on top, one by one
+    pen.goto(start_x, baseline_y)
+    for letter in text:
+        pen.write(letter, font=FONT, align="left")
+        pen.forward(FONT[1]*0.6 + LETTER_SPACING)
+        time.sleep(ANIMATION_DELAY)
+if __name__ == '__main__':
+    screen, pen, fractal_t = setup()
+    input()
+    animate_text_with_fractals(screen, pen, fractal_t, "ArduGeek")
+    pen.penup()
+    screen.mainloop()
+</code>
 {{:narzedzia:fractal_plant.jpg?400}}

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