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| import pygame import random
WIDTH = 600 HEIGHT = 600
class Snake: def __init__(self, screen): self.screen = screen self.body = [] self.fx = pygame.K_RIGHT self.init_body()
def init_body(self, length=5): left, top = (100, 100) for i in range(length): if self.body: left, top = self.body[0].left, self.body[0].top node = pygame.Rect(left + 20, top, 20, 20) else: node = pygame.Rect(left, top, 20, 20) self.body.insert(0, node)
def draw_snake(self): for n in self.body: pygame.draw.rect(self.screen, (62, 122, 178), n, 0)
def add_node(self): if self.body: left, top = self.body[0].left, self.body[0].top if self.fx == pygame.K_RIGHT: left += 20 elif self.fx == pygame.K_LEFT: left -= 20 elif self.fx == pygame.K_UP: top -= 20 else: top += 20 node = pygame.Rect(left, top, 20, 20) self.body.insert(0, node)
def del_node(self): self.body.pop()
def move(self): self.del_node() self.add_node()
def change(self, fx): LR = [pygame.K_LEFT, pygame.K_RIGHT] UD = [pygame.K_UP, pygame.K_DOWN] if fx in LR + UD: if fx in LR and self.fx in LR: return if fx in UD and self.fx in UD: return self.fx = fx
def is_dead(self): if self.body[0].left not in range(WIDTH): return True if self.body[0].top not in range(HEIGHT): return True if self.body[0] in self.body[1:]: return True
class Food: def __init__(self): self.node = pygame.Rect(60, 80, 20, 20) self.flag = False
def set(self): all_x_point = range(20, WIDTH - 20, 20) all_y_point = range(20, HEIGHT - 20, 20) left = random.choice(all_x_point) top = random.choice(all_y_point) self.node = pygame.Rect(left, top, 20, 20) self.flag = False
def reset(self): self.flag = True
def show_text(screen, pos, text, color, font_size=20): cur_font = pygame.font.SysFont('SimHei', font_size) text_fmt = cur_font.render(text, 1, color) screen.blit(text_fmt, pos)
def show_score(screen, score, high_score): score_text = f'得分: {score} 最高分: {high_score}' show_text(screen, (WIDTH - 280, 30), score_text, (0, 0, 0))
def main_menu(screen): menu_font = pygame.font.SysFont('SimHei', 40) menu_options = ['开始游戏', '继续游戏', '暂停游戏', '结束游戏'] selected_option = 0
while True: screen.fill((255, 255, 255))
title_text = menu_font.render('贪吃蛇', True, (0, 0, 0)) title_rect = title_text.get_rect(center=(WIDTH // 2, 100)) screen.blit(title_text, title_rect)
for i, option in enumerate(menu_options): if i == selected_option: color = (0, 255, 0) else: color = (0, 0, 0) option_text = menu_font.render(option, True, color) option_rect = option_text.get_rect(center=(WIDTH // 2, 200 + i * 60)) screen.blit(option_text, option_rect)
for event in pygame.event.get(): if event.type == pygame.QUIT: pygame.quit() return elif event.type == pygame.KEYDOWN: if event.key == pygame.K_UP: selected_option = (selected_option - 1) % len(menu_options) elif event.key == pygame.K_DOWN: selected_option = (selected_option + 1) % len(menu_options) elif event.key == pygame.K_RETURN: return selected_option
pygame.display.flip()
def main(): pygame.init() screen = pygame.display.set_mode([WIDTH, HEIGHT]) pygame.display.set_caption("贪吃蛇")
selected_option = main_menu(screen)
if selected_option == 0: score = 0 high_score = 0 sk = Snake(screen) fd = Food() dead = False
try: with open('high_score.txt', 'r') as file: high_score = int(file.read()) except FileNotFoundError: pass
clock = pygame.time.Clock()
while True: for e in pygame.event.get(): if e.type == pygame.QUIT: pygame.quit() return if e.type == pygame.KEYDOWN: if not dead: sk.change(e.key) if e.key == pygame.K_SPACE: score = 0 sk = Snake(screen) fd = Food() dead = False
screen.fill((255, 255, 255)) sk.draw_snake() if not dead: sk.move()
if sk.is_dead(): show_text(screen, (140, 160), '我一定会回来的', (202, 92, 85), 30) show_text(screen, (180, 320), '按 空格 重新开始', (116, 181, 103), 20) dead = True
if score > high_score: high_score = score with open('high_score.txt', 'w') as file: file.write(str(high_score))
if fd.flag: fd.set() pygame.draw.rect(screen, (255, 0, 0), fd.node, 0)
if sk.body[0].colliderect(fd.node): score += 1 sk.add_node() fd.reset()
show_score(screen, score, high_score)
pygame.display.update() clock.tick(10) elif selected_option == 1: pass elif selected_option == 2: pass elif selected_option == 3: pygame.quit() return
if __name__ == '__main__': main()
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