SnakeGame/snake.py at main · Ghosdak/SnakeGame · GitHub

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from turtle import Turtle

STARTING_X = [(0,0), (-20,0), (-40,0)]
MOVE_DISTANCE = 20
UP = 90
DOWN = 270
LEFT = 180
RIGHT = 0

class Snake():

    def __init__(self):
        self.snake = []
        self.create_snake()
        self.head = self.snake[0]

    def create_snake(self):
        for position in STARTING_X:
            self.get_segment(position)

    def get_segment(self, position):
        segment = Turtle(shape='square')
        segment.penup()
        segment.color('white')
        segment.goto(position)
        self.snake.append(segment)

    def extend_segment(self):
        self.get_segment(self.snake[-1].position())

    def move(self):
        for segment in range(len(self.snake)-1, 0, -1):
            new_x = self.snake[segment-1].xcor()
            new_y = self.snake[segment-1].ycor()
            self.snake[segment].goto(new_x,new_y)
        self.head.fd(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)