分类： Python/Ruby
2022-06-22 17:17:04
"""
贪吃蛇小游戏
"""
import random
import sys
import time
import pygame
from pygame.locals import *
from collections import deque
SCREEN_WIDTH = 600
SCREEN_HEIGHT = 480
SIZE = 20
def print_text(screen, font, x, y, text, fcolor=(255, 255, 255)):
imgText = font.render(text, True, fcolor)
screen.blit(imgText, (x, y))
def main():
pygame.init()
screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
pygame.display.set_caption('贪吃蛇')
light = (100, 100, 100) # 蛇的颜色
dark = (200, 200, 200) # 食物颜色
font1 = pygame.font.SysFont('SimHei', 24) # 得分的字体
font2 = pygame.font.Font(None, 72) # GAME OVER 的字体
red = (200, 30, 30) # GAME OVER 的字体颜色
fwidth, fheight = font2.size('GAME OVER')
line_width = 1 # 网格线宽度
black = (0, 0, 0) # 网格线颜色
bgcolor = (40, 40, 60) # 背景色
# 方向，起始向右
pos_x = 1
pos_y = 0
# 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，跟单网gendan5.com导致蛇后退，直接GAME OVER
# b 变量就是用于防止这种情况的发生
b = True
# 范围
scope_x = (0, SCREEN_WIDTH // SIZE - 1)
scope_y = (2, SCREEN_HEIGHT // SIZE - 1)
# 蛇
snake = deque()
# 食物
food_x = 0
food_y = 0
# 初始化蛇
def _init_snake():
nonlocal snake
snake.clear()
snake.append((2, scope_y[0]))
snake.append((1, scope_y[0]))
snake.append((0, scope_y[0]))
# 食物
def _create_food():
nonlocal food_x, food_y
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:
# 为了防止食物出到蛇身上
food_x = random.randint(scope_x[0], scope_x[1])
food_y = random.randint(scope_y[0], scope_y[1])
_init_snake()
_create_food()
game_over = True
start = False # 是否开始，当start = True，game_over = True 时，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
_init_snake()
_create_food()
pos_x = 1
pos_y = 0
# 得分
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):
# 这个判断是为了防止蛇向上移时按了向下键，导致直接 GAME OVER
if b and not pos_y:
pos_x = 0
pos_y = -1
b = False
elif event.key in (K_s, K_DOWN):
if b and not pos_y:
pos_x = 0
pos_y = 1
b = False
elif event.key in (K_a, K_LEFT):
if b and not pos_x:
pos_x = -1
pos_y = 0
b = False
elif event.key in (K_d, K_RIGHT):
if b and not pos_x:
pos_x = 1
pos_y = 0
b = False
# 填充背景色
screen.fill(bgcolor)
# 画网格线 竖线
for x in range(SIZE, SCREEN_WIDTH, SIZE):
pygame.draw.line(screen, black, (x, scope_y[0] * SIZE), (x, SCREEN_HEIGHT), line_width)
# 画网格线 横线
for y in range(scope_y[0] * SIZE, SCREEN_HEIGHT, SIZE):
pygame.draw.line(screen, black, (0, y), (SCREEN_WIDTH, y), line_width)
if game_over:
if start:
print_text(screen, font2, (SCREEN_WIDTH - fwidth) // 2, (SCREEN_HEIGHT - fheight) // 2, 'GAME OVER',
red)
else:
curTime = time.time()
if curTime - last_move_time > speed:
if not pause:
b = True
last_move_time = curTime
next_s = (snake[0][0] + pos_x, snake[0][1] + pos_y)
if next_s[0] == food_x and next_s[1] == food_y:
# 吃到了食物
_create_food()
snake.appendleft(next_s)
score += 10
speed = orispeed - 0.03 * (score // 100)
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
if not game_over:
# 避免 GAME OVER 的时候把 GAME OVER 的字给遮住了
pygame.draw.rect(screen, light, (food_x * SIZE, food_y * 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, font1, 30, 7, f'速度: {score // 100}')
print_text(screen, font1, 450, 7, f'得分: {score}')
pygame.display.update()
if __name__ == '__main__':
main()
