turtlepen
A simple pattern drawing toy inspired by Turtle and Waterbear.
Example usage
Example 1
from turtlepen import blocks, tools, turtle
# create a turtle
turtle = Turtle()
# draw a circle by repeating the following action for 360 times:
# move the turtle 10 steps ahead and change its direction by 1 degree
action = Repeat(360,
[
Rotate(1),
Forward(10),
])
# apply compiled action blocks to turtle
action(turtle)
# visualize turtle's trace
visualize_trace(turtle)Output:
Example 2
from turtlepen import blocks, tools, turtle
# create a turtle
turtle = Turtle()
# compile actions blocks representing a series of actions
# to draw a complex pattern
action = Repeat(10,
[
Rotate(-5),
Repeat(10, [
Forward(10),
Rotate(-14),
]),
Repeat(10, [
Rotate(5),
Repeat(17, [
Forward(13),
Rotate(-3),
]),
BackToCenter(),
Rotate(3),
Repeat(11, [
PenUp(),
Forward(29),
PenDown(),
Rotate(4),
Forward(-24),
])
]),
])
# apply compiled action blocks to turtle
action(turtle)
# visualize turtle's trace
visualize_trace(turtle)Output:
Experimental
A mini-language parser with the following single-letter commands:
P -> Repeat
R -> Rotate
F -> Forward
U -> PenUp
D -> PenDown
B -> BackToCenter
where indented lines following `P` are repeated by `P`.
For instance, the script below is equivalent to Example 2 above:
P 10
R -5
P 10
F 10
R -14
P 10
R 5
P 17
F 13
R -3
B
R 3
P 11
U
F 29
D
R 4
F -24