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All-In-One-Python-Projects/Snake-Game/Snake.py at main · GHubPythonProjects/All-In-One-Python-Projects · GitHub

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from turtle import Turtle, Screen

STARTING_POSITIONS = [(0, 0), (-20, 0), (-40, 0)]

MOVE_DISTANCE = 20

UP = 90

DOWN = 270

RIGHT = 0

LEFT = 180

class Snake:

def __init__(self):

self.segments = []

self.x = 0

self.create_snake()

self.head = self.segments[0]

def create_snake(self):

for position in STARTING_POSITIONS:

self.add_segment(position)

def add_segment(self, position):

new_segment = Turtle("square")

new_segment.color("white")

new_segment.penup()

new_segment.goto(position)

self.segments.append(new_segment)

def reset(self):

for seg in self.segments:

seg.goto(1000, 1000)

self.segments.clear()

self.create_snake()

self.head = self.segments[0]

def extend(self):

self.add_segment(self.segments[-1].position())

def move(self):

for seg_num in range(len(self.segments)-1, 0,-1):

new_x = self.segments[seg_num-1].xcor()

new_y = self.segments[seg_num - 1].ycor()

self.segments[seg_num].goto(new_x, new_y)

self.head.forward(MOVE_DISTANCE)

def up(self):

if self.head.heading() != DOWN:

self.head.setheading(UP)

def down(self):

if self.head.heading() != UP:

self.head.setheading(DOWN)

def left(self):

if self.head.heading() != RIGHT:

self.head.setheading(LEFT)

def right(self):

if self.head.heading() != LEFT:

self.head.setheading(RIGHT)

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