.

bac1/q1/04oct/ex3.py

@@ -0,0 +1,36 @@
+from uturtle import (
+    umonsTurtle, wait,
+    moveForward, moveBackward,
+    turnLeft, turnRight,
+    dropPen, usePen)
+
+
+def koch(t: umonsTurtle, x: int, seuil: int):
+    """Dessine une courbe de koch
+
+    :t: the turtle used
+    :x: the length
+    :seuil: seuil of smallest step
+    :returns: None
+
+    """
+    if x < seuil:
+        moveForward(t, x)
+    else:
+        koch(t, x/3, seuil)
+        turnLeft(t, 60)
+        koch(t, x/3, seuil)
+        turnRight(t, 120)
+        koch(t, x/3, seuil)
+        turnLeft(t, 60)
+        koch(t, x/3, seuil)
+
+
+if __name__ == "__main__":
+    turtle = umonsTurtle()
+    turtle.speed(0)
+    dropPen(turtle)
+    moveBackward(turtle, 250)
+    usePen(turtle)
+    koch(turtle, 500, 20)
+    wait()