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snake.py
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snake.py
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#Simple snake game using pygame
import random
import sys
import os
import pygame
HIGHSCORES_FILE = 'highscores.txt'
class Snake(object):
def __init__(self):
self.length = 1
self.positions = [((SCREEN_WIDTH / 2), (SCREEN_HEIGHT / 2))]
self.direction = random.choice([UP, DOWN, LEFT, RIGHT])
self.prev_dir = self.direction
self.color = BLUE
self.score = 0
self.state = 'playing'
def get_head_pos(self):
return self.positions[0]
def turn(self, point):
if self.length > 1 and (point[0] * -1, point[1] * -1) == self.prev_dir:
return
self.direction = point
def move(self, max_score):
cur = self.get_head_pos()
self.prev_dir = self.direction
x, y = self.direction
new = (((cur[0] + (x * GRID_SIZE)) % SCREEN_WIDTH), (cur[1] + (y * GRID_SIZE)) % SCREEN_HEIGHT)
if self.length > 2 and new in self.positions[2:]:
if self.score > max_score:
os.system('afplay ./sounds/victory.mp3&')
else:
os.system('afplay ./sounds/gameover.wav&')
self.state = 'gameover'
else:
self.positions.insert(0, new)
if len(self.positions) > self.length:
self.positions.pop()
def reset(self, surface, max_score):
self.length = 1
self.positions = [((SCREEN_WIDTH / 2), (SCREEN_HEIGHT / 2))]
self.direction = random.choice([UP, DOWN, LEFT, RIGHT])
self.prev_dir = self.direction
if self.store is None:
self.store = self.score
self.score = 0
surface.fill((0,0,0))
font = pygame.font.SysFont("comicsans", 60)
if self.store > max_score:
font = pygame.font.SysFont("comicsans", 60)
text = font.render('NEW HIGHSCORE!', 1, (246,249,0))
surface.blit(text, ((SCREEN_WIDTH-text.get_width())//2,(SCREEN_HEIGHT-text.get_height())//2-40))
else:
text = font.render('Game Over', 1, (246,249,0))
surface.blit(text, ((SCREEN_WIDTH-text.get_width())//2,(SCREEN_HEIGHT-text.get_height())//2-40))
font = pygame.font.SysFont("comicsans", 40)
text = font.render('Score = {}'.format(self.store), 1, (255,255,255))
surface.blit(text, ((SCREEN_WIDTH-text.get_width())//2,(SCREEN_HEIGHT-text.get_height())//2))
font = pygame.font.SysFont("arial", 20)
text = font.render('>>Press SPACE_BAR to play again', 1, (255,255,255))
surface.blit(text, ((SCREEN_WIDTH-text.get_width())-20,(SCREEN_HEIGHT-text.get_height())-40))
def draw(self, surface):
for p in self.positions:
if p != self.positions[0]:
r = pygame.Rect((int(p[0]), int(p[1])), (GRID_SIZE, GRID_SIZE))
pygame.draw.rect(surface, self.color, r)
pygame.draw.rect(surface, BLACK, r, 1)
pygame.draw.circle(surface, BLUE, (int(self.positions[0][0] + GRID_SIZE/2), int(self.positions[0][1] + int(GRID_SIZE/2))), int(GRID_SIZE/2))
pygame.draw.circle(surface, BLACK, (int(self.positions[0][0] + GRID_SIZE/2), int(self.positions[0][1] + int(GRID_SIZE/2))), int(GRID_SIZE/2),2)
def handleKeys(self):
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
sys.exit()
elif event.type == pygame.KEYDOWN:
if (event.key == pygame.K_UP) or (event.key == pygame.K_w):
self.turn(UP)
elif (event.key == pygame.K_DOWN) or (event.key == pygame.K_s):
self.turn(DOWN)
elif (event.key == pygame.K_LEFT )or (event.key == pygame.K_a):
self.turn(LEFT)
elif (event.key == pygame.K_RIGHT) or (event.key == pygame.K_d):
self.turn(RIGHT)
elif event.key == pygame.K_SPACE:
self.state = 'playing'
class Food(object):
def __init__(self):
self.position = (0, 0)
self.color = YELLOW
self.randomize_pos()
def randomize_pos(self):
self.position = (random.randint(0, GRID_WIDTH - 1) * GRID_SIZE, random.randint(2, GRID_HEIGHT - 1) * GRID_SIZE)
def draw(self, surface):
r = pygame.Rect((self.position[0], self.position[1]), (GRID_SIZE, GRID_SIZE))
pygame.draw.rect(surface, self.color, r)
SCREEN_WIDTH = 480
SCREEN_HEIGHT = 480
WHITE = (255,255,255)
BLACK = (0,0,0)
YELLOW = (26,93,191)
BLUE = (250,215,68)
GRID_SIZE = 20
GRID_WIDTH = SCREEN_WIDTH / GRID_SIZE
GRID_HEIGHT = SCREEN_HEIGHT / GRID_SIZE
UP = (0, -1)
DOWN = (0, 1)
LEFT = (-1, 0)
RIGHT = (1, 0)
def main():
pygame.init()
clock = pygame.time.Clock()
screen = pygame.display.set_mode((SCREEN_HEIGHT, SCREEN_WIDTH), 0, 32)
max_score = 0
surface = pygame.Surface(screen.get_size())
surface = surface.convert()
pygame.display.set_caption('Snake')
snake = Snake()
food = Food()
myfont = pygame.font.SysFont("comicsans", 40)
with open(HIGHSCORES_FILE, "r") as file:
max_score = int(file.read())
while(True):
snake.handleKeys()
surface.fill((0, 0, 0))
snake.move(max_score)
clock.tick(10 + snake.score/1.5)
if snake.get_head_pos() == food.position:
snake.length += 1
snake.score += 1
os.system('afplay ./sounds/eat.mp3&')
food.randomize_pos()
with open(HIGHSCORES_FILE, "r") as file:
max_score = int(file.read())
if snake.state == 'gameover':
if snake.score > max_score:
file = open(HIGHSCORES_FILE, "w")
file.write(str(snake.score))
file.close()
snake.reset(surface, max_score)
screen.blit(surface, (0, 0))
else:
snake.store = None
food.draw(surface)
snake.draw(surface)
screen.blit(surface, (0, 0))
text = myfont.render("Score {0}".format(snake.score), 1, (255, 255, 255))
screen.blit(text, (15, 10))
text = myfont.render("Highscore {0}".format(max_score), 1, (255, 255, 255))
screen.blit(text, (280, 10))
pygame.display.update()
main()