Snake-Game/snake.py at main · Yuv-Rajd/Snake-Game · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
from turtle import Turtle
STARTING_POSITION=[(0,0),(-20,0),(-40,0)]
MOVE_DISTANCE=20
UP = 90
DOWN =270
LEFT=180
RIGHT=0

class Snake:

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

    def create_snake(self):
        for position in STARTING_POSITION:
            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.segment.append(new_segment)

    def extend(self):
        #add new segment
        self.add_segment(self.segment[-1].position())


    def move(self):
        for seg_num in range(len(self.segment)-1,0,-1):
            new_x=self.segment[seg_num-1].xcor()
            new_y=self.segment[seg_num-1].ycor()
            self.segment[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 right(self):
        if self.head.heading()!=LEFT:
            self.head.setheading(RIGHT)

    def left(self):
        if self.head.heading()!=RIGHT:
            self.head.setheading(LEFT)