#________________ WELCOME ALL OF YOU ON COMPUTER SOFT SKILLS CHANNEL __________
#........................................... PYTHON PROGRAM TO CREATE SNAKE GAME ....................
import turtle
import random
WIDTH = 800
HEIGHT = 760
FOOD_SIZE = 8
DELAY = 165 # snake speed in milliseconds
offsets = {
"up": (0, 20),
"down": (0, -20),
"left": (-20, 0),
"right": (20, 0)
}
def reset():
global snake, snake_direction, food_pos, pen
snake = [[0, 0], [0, 20], [0, 40], [0, 50], [0, 60]]
snake_direction = "up"
food_pos = get_random_food_pos()
food.goto(food_pos)
move_snake()
def move_snake():
global snake_direction
# Next position for head of snake.
new_head = snake[-1].copy()
new_head[0] = snake[-1][0] + offsets[snake_direction][0]
new_head[1] = snake[-1][1] + offsets[snake_direction][1]
# Check self-collision
if new_head in snake[:-1]: # Or collision with walls
reset()
else:
# No self-collision so we can continue moving the snake.
snake.append(new_head)
# Check food collision
if not food_collision():
snake.pop(0) # Keep the snake the same length unless fed.
# Allow screen wrapping
if snake[-1][0] > WIDTH / 2:
snake[-1][0] -= WIDTH
elif snake[-1][0] < - WIDTH / 2:
snake[-1][0] += WIDTH
elif snake[-1][1] > HEIGHT / 2:
snake[-1][1] -= HEIGHT
elif snake[-1][1] < -HEIGHT / 2:
snake[-1][1] += HEIGHT
# Clear previous snake stamps
pen.clearstamps()
# Draw snake
for segment in snake:
pen.goto(segment[0], segment[1])
pen.stamp()
# Refresh screen
screen.update()
# Rinse and repeat
turtle.ontimer(move_snake, DELAY)
def food_collision():
global food_pos
if get_distance(snake[-1], food_pos) < 20:
food_pos = get_random_food_pos()
food.goto(food_pos)
return True
return False
def get_random_food_pos():
x = random.randint(- WIDTH / 2 + FOOD_SIZE, WIDTH / 2 - FOOD_SIZE)
y = random.randint(- HEIGHT / 2 + FOOD_SIZE, HEIGHT / 2 - FOOD_SIZE)
return (x, y)
def get_distance(pos1, pos2):
x1, y1 = pos1
x2, y2 = pos2
distance = ((y2 - y1) ** 2 + (x2 - x1) ** 2) ** 0.5
return distance
def go_up():
global snake_direction
if snake_direction != "down":
snake_direction = "up"
def go_right():
global snake_direction
if snake_direction != "left":
snake_direction = "right"
def go_down():
global snake_direction
if snake_direction != "up":
snake_direction = "down"
def go_left():
global snake_direction
if snake_direction != "right":
snake_direction = "left"
# GAME Screen
screen = turtle.Screen()
screen.setup(WIDTH, HEIGHT)
screen.title("Computer Soft Skills- SNAKE GAME")
screen.bgcolor("lime")
screen.setup(800, 760)
screen.tracer(0)
# Pen snake color
pen = turtle.Turtle("circle")
pen.color("mediumblue")
pen.penup()
# Food
food = turtle.Turtle()
food.shape("turtle")
food.color("darkred")
food.shapesize(FOOD_SIZE / 8) # food size 8
food.penup()
# Event handlers
screen.listen()
screen.onkey(go_up, "Up")
screen.onkey(go_right, "Right")
screen.onkey(go_down, "Down")
screen.onkey(go_left, "Left")
# Let's go
reset()
turtle.done()
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