pygame贪吃蛇游戏
pygame贪吃蛇游戏
贪吃蛇游戏通过enter键启动，贪吃蛇通过WSAD进行上下左右移动，每次在游戏区域中随机生成一个食物，每次吃完食物后，蛇变长并且获得积分；按空格键暂停。
'''贪吃蛇'''
import random, sys, time, pygame
from pygame.locals import *
from collections import deque
SCREEN_WIDTH = 600 # 屏幕宽度
SCREEN_HEIGHT = 480 # 屏幕高度
SIZE = 20 # 小方格大小
LINE_WIDTH = 1 # 网格线宽度
# 游戏区域的坐标范围
SCOPE_X = (0, SCREEN_WIDTH//SIZE - 1)
SCOPE_Y = (0, SCREEN_HEIGHT//SIZE - 1)
# 食物的分值与颜色
FOOD_STYLE_LIST = [(10, (255, 100, 100)), (20, (100, 255, 100)), (30, (100, 100, 255))]
LIGHT = (100, 100, 100)
DARK = (200, 200, 200) # 蛇的颜色
BLACK = (0, 0, 0) # 网格线的颜色
RED = (200, 30, 30) # 游戏结束颜色
BGCOLOR = (40, 40, 60) # 背景色
def init_snake():
snake = deque() # 用一个双端队列表示蛇
snake.append((2, SCOPE_Y[0]))
snake.append((1, SCOPE_Y[0]))
snake.append((0, SCOPE_Y[0]))
return snake
def create_food(snake):
food_x = random.randint(SCOPE_X[0], SCOPE_X[1])
food_y = random.randint(SCOPE_Y[0], SCOPE_Y[1])
while (food_x, food_y) in snake: # 如果蛇已经吃掉了食物则重新生成
food_x = random.randint(SCOPE_X[0], SCOPE_X[1])
food_y = random.randint(SCOPE_Y[0], SCOPE_Y[1])
return food_x, food_y
def get_food_style():
return FOOD_STYLE_LIST[random.randint(0, 2)]
def print_text(screen, font, x, y, text, fcolor=(255, 255, 255)):
imgText = font.render(text, True, fcolor)
screen.blit(imgText, (x, y))
# 主函数
def main():
pygame.init()
screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
pygame.display.set_caption('贪吃蛇')
# 字体
SIMHEI = pygame.font.SysFont('SimHei', 24) # 得分的字体
GAMEOVERFONT = pygame.font.Font(None, 72) # GAME OVER的字体
fwidth, fheight = GAMEOVERFONT.size('GAME OVER')
# 如果蛇正在向右移动，那么快速点击向下向左，由于程序刷新没那么快，向下事件会被向左覆盖掉，
# 导致蛇后退，游戏结束
b = True
snake = init_snake() # 初始化蛇
food = create_food(snake) # 食物
food_style = get_food_style() # 食物的颜色
pos = (1, 0) # 方向
game_over = True
start = False # 是否开始，当start，game_over都是True才显示 GAME OVER
score = 0 # 得分
orispeed = 0.5 # 原始速度
speed = orispeed
last_move_time = None
pause = False # 暂停
while True:
for event in pygame.event.get():
if event.type == QUIT:
sys.exit()
elif event.type == KEYDOWN:
if event.key == K_RETURN:
if game_over:
start = True
game_over = False
b = True
snake = init_snake()
food = create_food(snake)
food_style = get_food_style()
pos = (1, 0)
score = 0
last_move_time = time.time()
elif event.key == K_SPACE:
if not game_over:
pause = not pause
elif event.key in (K_w, K_UP):
# 防止蛇向上移动时按了向下键，导致直接结束
if b and not pos[1]:
pos = (0, -1)
b = False
elif event.key in (K_s, K_DOWN):
if b and not pos[1]:
pos = (0, 1)
b = False
elif event.key in (K_a, K_LEFT):
if b and not pos[0]:
pos = (-1, 0)
b = False
elif event.key in (K_d, K_RIGHT):
if b and not pos[0]:
pos = (1, 0)
b = False
# 填充背景色
screen.fill(BGCOLOR)
# 画网格线
for x in range(SIZE, SCREEN_WIDTH, SIZE):
pygame.draw.line(screen, BLACK, (x, SCOPE_Y[0]*SIZE), (x, SCREEN_HEIGHT), LINE_WIDTH)
for y in range(SCOPE_Y[0]*SIZE, SCREEN_HEIGHT, SIZE):
pygame.draw.line(screen, BLACK, (0, y), (SCREEN_WIDTH, y), LINE_WIDTH)
if not game_over:
curTime = time.time()
if curTime - last_move_time > speed:
if not pause:
b = True
last_move_time = curTime
next_s = (snake[0][0] + pos[0], snake[0][1] + pos[1])
if next_s == food: # 迟到了食物
snake.appendleft(next_s)
score += food_style[0]
speed = orispeed - 0.03 * (score//100)
food = create_food(snake)
food_style = get_food_style()
else:
if SCOPE_X[0] <= next_s[0] <= SCOPE_X[1] and \
SCOPE_Y[0] <= next_s[1] <= SCOPE_Y[1] and \
next_s not in snake:
snake.appendleft(next_s)
snake.pop()
else:
game_over = True
# 画食物,避免 GAME OVER 的时候把 GAME OVER 的字给遮住了
if not game_over:
pygame.draw.rect(screen, food_style[1], (food[0]*SIZE, food[1] * SIZE, SIZE, SIZE), 0)
# 画蛇
for s in snake:
pygame.draw.rect(screen, DARK, (s[0]*SIZE + LINE_WIDTH, s[1]*SIZE + LINE_WIDTH,
SIZE - LINE_WIDTH*2, SIZE - LINE_WIDTH*2), 0)
print_text(screen, SIMHEI, 30, 7, f'速度: {score//100}')
print_text(screen, SIMHEI, 450, 7, f'得分: {score}')
if game_over:
if start:
print_text(screen, GAMEOVERFONT, (SCREEN_WIDTH - fwidth)//2, (SCREEN_HEIGHT - fheight)//2, 'GAME OVER', RED)
pygame.display.update()
if __name__ == '__main__':
main()
