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snake.py
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snake.py
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import pygame, random
from pygame.locals import *
from os.path import expanduser
def on_grid_random():
x = random.randint(0,590)
y = random.randint(0,590)
return (x//10 * 10, y//10 * 10)
def collision(c1, c2):
return (c1[0] == c2[0]) and (c1[1] == c2[1])
UP = 0
DOWN = 1
RIGHT = 2
LEFT = 3
clock = pygame.time.Clock()
pygame.init()
screen = pygame.display.set_mode((600,600))
pygame.display.set_caption('Snake Game')
#Set file save location
save_file_name = expanduser("~")+"/score.dat"
#Save high score to file
def save_hi_score(file_name, value):
try:
save_file = open(file_name,"w")
save_file.write(str(value))
save_file.close()
except:
print("Error to save data!!!")
#Read high score from file
def get_hi_score(file_name):
points = 0
try:
save_file = open(file_name,"r+")
points = int(save_file.read())
save_file.close()
except:
print("Error to read data!!! Attempting to create a new save file...")
save_file = open(file_name,"w")
if(save_file):
print("Save game file created!")
save_file.write(str(points))
save_file.close()
return points
#Restart Function
def restart_game():
restart_font = pygame.font.Font('freesansbold.ttf',50)
restart_screen = restart_font.render('Press Space to Restart', True, (100, 100, 100))
restart_rect = restart_screen.get_rect()
restart_rect.midtop = (300, 300)
screen.blit(restart_screen, restart_rect)
while True:
clock.tick(15)
for event in pygame.event.get():
if event.type == QUIT:
pygame.quit()
exit()
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_SPACE:
start_game()
pygame.display.update()
#The game itself
def start_game():
snake = [(200, 200),(210, 200), (220, 200)]
snake_skin = pygame.Surface((10,10))
snake_skin.fill((34,139,34))
snake_speed = 15
food_pos = on_grid_random()
food = pygame.Surface((10,10))
food.fill((255,0,0))
my_direction = LEFT
font = pygame.font.Font('freesansbold.ttf', 18)
score = 0
high_score = get_hi_score(save_file_name)
game_over = False
while not game_over:
clock.tick(snake_speed)
for event in pygame.event.get():
if event.type == QUIT:
pygame.quit()
exit()
#Movements Comamands
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_UP and my_direction != DOWN:
my_direction = UP
if event.key == pygame.K_DOWN and my_direction != UP:
my_direction = DOWN
if event.key == pygame.K_LEFT and my_direction != RIGHT:
my_direction = LEFT
if event.key == pygame.K_RIGHT and my_direction != LEFT:
my_direction = RIGHT
#Adding points, speed and the new part of the snake
if collision(snake[0], food_pos):
food_pos = on_grid_random()
snake.append((0,0))
score = score + 1
snake_speed = snake_speed + 6
# Check if the snake has collided with boundaries
if snake[0][0] == 600 or snake[0][1] == 600 or snake[0][0] < 0 or snake [0][1] < 0:
game_over = True
break
# Check if the snake has collided with itself
for i in range(1, len(snake) - 1):
if snake[0][0] == snake[i][0] and snake[0][1] == snake[i][1]:
game_over = True
break
if game_over:
break
for i in range(len(snake) - 1, 0, -1):
snake[i] = (snake[i-1][0], snake[i-1][1])
#Snake movements
if my_direction == UP:
snake[0] = (snake[0][0], snake[0][1] - 10)
if my_direction == DOWN:
snake[0] = (snake[0][0], snake[0][1] + 10)
if my_direction == RIGHT:
snake[0] = (snake[0][0] + 10, snake[0][1])
if my_direction == LEFT:
snake[0] = (snake[0][0] - 10, snake[0][1])
screen.fill((0,0,0))
screen.blit(food, food_pos)
# Draw horizontal lines
for x in range(0, 600, 10):
pygame.draw.line(screen, (40, 40, 40), (x, 0), (x, 600))
# Draw vertical lines
for y in range(0, 600, 10):
pygame.draw.line(screen, (40, 40, 40), (0, y), (600, y))
#Displaying Score
score_font = font.render('Score: %s' % (score), True, (255,255,255))
score_rect = score_font.get_rect()
score_rect.topleft = (20, 10)
screen.blit(score_font, score_rect)
#Displaying Highscore
high_score_font = font.render('Highscore: %s'% (high_score), True, (255,255,255))
high_score_rect = score_font.get_rect()
high_score_rect.topright = (540, 10)
screen.blit(high_score_font, high_score_rect)
if score > high_score:
high_score = score
save_hi_score(save_file_name, high_score)
for pos in snake:
screen.blit(snake_skin, pos)
pygame.display.update()
while True:
#Displaying Game Over
game_over_font = pygame.font.Font('freesansbold.ttf', 75)
game_over_screen = game_over_font.render('Game Over', True, (255,255,255))
game_over_rect = game_over_screen.get_rect()
game_over_rect.midtop = (600 / 2, 100)
screen.blit(game_over_screen, game_over_rect)
restart_game()
pygame.display.update()
pygame.time.wait(500)
while True:
for event in pygame.event.get():
if event.type == QUIT:
pygame.quit()
exit()
start_game()