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FloweringTree.py
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FloweringTree.py
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# -*- coding: utf-8 -*-
"""
Created on Tue Apr 10 14:18:10 2018
@author: lixin (Justin Lee)
"""
import random
from math import sqrt
from turtle import *
DEBUG = False
BRANCH_LENGTH = 60
SUN_RADIUS = 40
MAGIC = 12
class FloweringTree:
def __init__(self):
self.petal_count = 0
self.petal_left_border = 0.0
self.petal_right_border = 0.0
self.turtle = Turtle()
self.frame = Screen()
if DEBUG:
self.frame.tracer(0, 0)
else:
self.frame.tracer(3, 0)
self.frame.bgcolor('wheat')
self.turtle.up()
def tree(self, branch_len):
if branch_len > 3:
if 8 <= branch_len <= 12:
if random.randint(0, 2) == 0:
self.turtle.color('snow')
else:
self.turtle.color('lightcoral')
self.turtle.pensize(branch_len / 3)
elif branch_len < 8:
self.petal_count += 1
cur_x = self.turtle.pos()[0]
if cur_x < 0:
self.petal_left_border = min(self.petal_left_border, cur_x)
else:
self.petal_right_border = max(self.petal_right_border, cur_x)
if random.randint(0, 1) == 0:
self.turtle.color('snow')
else:
self.turtle.color('lightcoral')
self.turtle.pensize(branch_len / 2)
else:
self.turtle.color('sienna')
self.turtle.pensize(branch_len / 10)
# Draw the branch/leaf
self.turtle.down()
self.turtle.forward(branch_len)
self.turtle.up()
random_angle = 3 + 2 * MAGIC * random.random()
random_length = MAGIC * random.random()
self.turtle.right(random_angle)
self.tree(branch_len - random_length)
self.turtle.left(2 * random_angle)
self.tree(branch_len - random_length)
self.turtle.right(random_angle)
# return to the root of this chile tree
self.turtle.up()
self.turtle.backward(branch_len)
def petal_field(self, count, left_border=-100.0, right_border=100.0):
middle = (right_border + left_border) / 2
frame_width = (right_border - left_border) / 3
depth = int(sqrt(frame_width))
_start_pos = self.turtle.pos()
start_pos = (middle, _start_pos[1] + depth / 2 - BRANCH_LENGTH / 10)
self.turtle.goto(start_pos)
for _ in range(count):
random_width = frame_width - 2 * frame_width * random.random()
random_depth = depth - 2 * depth * random.random()
self.turtle.forward(random_depth)
self.turtle.left(90)
self.turtle.forward(random_width)
self.turtle.down()
if random.randint(0, 1) == 0:
self.turtle.color("snow")
else:
self.turtle.color("lightcoral")
rand_size = random.random()
self.turtle.pensize(2.5 * rand_size)
self.turtle.begin_fill()
self.turtle.circle(rand_size)
self.turtle.end_fill()
self.turtle.up()
self.turtle.right(90)
self.turtle.goto(start_pos)
# Repaint the covered branch
self.turtle.goto(_start_pos)
self.turtle.color('sienna')
self.turtle.pensize(BRANCH_LENGTH // 10)
self.turtle.down()
self.turtle.forward(BRANCH_LENGTH)
self.turtle.up()
def the_sun(self, radius=30):
start_pos = self.turtle.pos()
self.turtle.forward(500)
self.turtle.left(90)
self.turtle.forward(300)
self.turtle.down()
self.turtle.color('red')
self.turtle.begin_fill()
self.turtle.circle(radius)
self.turtle.end_fill()
self.turtle.color('lightcoral')
self.turtle.up()
self.turtle.right(90)
self.turtle.goto(start_pos)
def signature(self):
start_pos = self.turtle.pos()
self.turtle.color('sienna')
self.turtle.write("Made with ❤ by Justin Lee!", font=("Futura", 16, "normal"))
self.turtle.goto(start_pos)
def draw(self):
try:
self.turtle.left(90)
self.turtle.backward(250)
self.the_sun(SUN_RADIUS)
self.tree(BRANCH_LENGTH)
self.petal_count = self.petal_count // (int(sqrt(2 * MAGIC)))
self.petal_field(self.petal_count, self.petal_left_border, self.petal_right_border)
self.turtle.backward(100)
self.signature()
self.turtle.color('wheat')
self.turtle.down()
self.turtle.forward(20)
self.frame.exitonclick()
except KeyboardInterrupt:
print('Keyboard Interrupt.')
if __name__ == '__main__':
flowering_tree = FloweringTree()
flowering_tree.draw()