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snake_game.py

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+import pygame
+import random
+
+# 初始化 Pygame
+pygame.init()
+
+# 游戏窗口设置
+WINDOW_X = 720
+WINDOW_Y = 480
+game_window = pygame.display.set_mode((WINDOW_X, WINDOW_Y))
+pygame.display.set_caption('贪吃蛇游戏')
+
+# 颜色定义
+BLACK = pygame.Color(0, 0, 0)
+WHITE = pygame.Color(255, 255, 255)
+RED = pygame.Color(255, 0, 0)
+GREEN = pygame.Color(0, 255, 0)
+
+# 游戏控制
+FPS = pygame.time.Clock()
+FONT_SMALL = pygame.font.SysFont('simhei', 20)
+FONT_MEDIUM = pygame.font.SysFont('simhei', 30)
+FONT_LARGE = pygame.font.SysFont('simhei', 50)
+
+class SnakeGame:
+    def __init__(self):
+        self.reset_game()
+        
+    def reset_game(self):
+        """重置游戏状态"""
+        self.snake_position = [100, 50]
+        self.snake_body = [[100, 50], [90, 50], [80, 50], [70, 50]]
+        self.food_position = [
+            random.randrange(1, (WINDOW_X // 10)) * 10,
+            random.randrange(1, (WINDOW_Y // 10)) * 10
+        ]
+        self.food_spawn = True
+        self.direction = 'RIGHT'
+        self.change_to = self.direction
+        self.score = 0
+        self.speed = 10
+        self.game_over_flag = False
+        self.key_press_time = None
+
+    def show_score(self, position=1):
+        """显示当前分数"""
+        score_surface = FONT_SMALL.render(f'分数 : {self.score}', True, WHITE)
+        score_rect = score_surface.get_rect()
+        if position == 1:
+            score_rect.midtop = (WINDOW_X / 10, 15)
+        else:
+            score_rect.midtop = (WINDOW_X / 2, WINDOW_Y / 1.25)
+        game_window.blit(score_surface, score_rect)
+
+    def game_over(self):
+        """显示游戏结束界面"""
+        game_over_surface = FONT_LARGE.render(f'你的分数 : {self.score}', True, RED)
+        game_over_rect = game_over_surface.get_rect()
+        game_over_rect.midtop = (WINDOW_X / 2, WINDOW_Y / 4)
+        game_window.blit(game_over_surface, game_over_rect)
+
+        restart_surface = FONT_MEDIUM.render('按C键重新开始游戏', True, WHITE)
+        restart_rect = restart_surface.get_rect()
+        restart_rect.midtop = (WINDOW_X / 2, WINDOW_Y / 2)
+        game_window.blit(restart_surface, restart_rect)
+        
+        pygame.display.flip()
+
+    def handle_events(self):
+        """处理用户输入事件"""
+        for event in pygame.event.get():
+            if event.type == pygame.QUIT:
+                return False
+                
+            if event.type == pygame.KEYDOWN:
+                if event.key == pygame.K_UP:
+                    self.change_to = 'UP'
+                    self.key_press_time = pygame.time.get_ticks() / 1000
+                if event.key == pygame.K_DOWN:
+                    self.change_to = 'DOWN'
+                    self.key_press_time = pygame.time.get_ticks() / 1000
+                if event.key == pygame.K_LEFT:
+                    self.change_to = 'LEFT'
+                    self.key_press_time = pygame.time.get_ticks() / 1000
+                if event.key == pygame.K_RIGHT:
+                    self.change_to = 'RIGHT'
+                    self.key_press_time = pygame.time.get_ticks() / 1000
+                if event.key == pygame.K_c and self.game_over_flag:
+                    self.reset_game()
+                    
+            if event.type == pygame.KEYUP:
+                self.key_press_time = None
+                
+        return True
+
+    def update_speed(self):
+        """根据按键时间调整蛇的速度"""
+        if self.key_press_time:
+            elapsed_time = pygame.time.get_ticks() / 1000 - self.key_press_time
+            if elapsed_time < 0.5:
+                self.speed = 15
+            elif elapsed_time < 1:
+                self.speed = 20
+            else:
+                self.speed = 25
+        else:
+            self.speed = 10
+
+    def validate_direction(self):
+        """确保蛇不能直接反向移动"""
+        if self.change_to == 'UP' and self.direction != 'DOWN':
+            self.direction = self.change_to
+        if self.change_to == 'DOWN' and self.direction != 'UP':
+            self.direction = self.change_to
+        if self.change_to == 'LEFT' and self.direction != 'RIGHT':
+            self.direction = self.change_to
+        if self.change_to == 'RIGHT' and self.direction != 'LEFT':
+            self.direction = self.change_to
+
+    def move_snake(self):
+        """移动蛇并处理碰撞检测"""
+        # 根据方向移动蛇头
+        if self.direction == 'UP':
+            self.snake_position[1] -= 10
+        if self.direction == 'DOWN':
+            self.snake_position[1] += 10
+        if self.direction == 'LEFT':
+            self.snake_position[0] -= 10
+        if self.direction == 'RIGHT':
+            self.snake_position[0] += 10
+
+        # 蛇吃食物
+        self.snake_body.insert(0, list(self.snake_position))
+        if self.snake_position == self.food_position:
+            self.score += 10
+            self.food_spawn = False
+        else:
+            self.snake_body.pop()
+
+        # 生成新食物
+        if not self.food_spawn:
+            self.food_position = [
+                random.randrange(1, (WINDOW_X // 10)) * 10,
+                random.randrange(1, (WINDOW_Y // 10)) * 10
+            ]
+            # 确保新食物不会出现在蛇身上
+            while self.food_position in self.snake_body:
+                self.food_position = [
+                    random.randrange(1, (WINDOW_X // 10)) * 10,
+                    random.randrange(1, (WINDOW_Y // 10)) * 10
+                ]
+        self.food_spawn = True
+
+        # 边界碰撞检测
+        if (self.snake_position[0] < 0 or self.snake_position[0] > WINDOW_X - 10 or
+            self.snake_position[1] < 0 or self.snake_position[1] > WINDOW_Y - 10):
+            self.game_over_flag = True
+
+        # 自身碰撞检测
+        for block in self.snake_body[1:]:
+            if self.snake_position == block:
+                self.game_over_flag = True
+
+    def draw(self):
+        """绘制游戏元素"""
+        game_window.fill(BLACK)
+        
+        # 绘制蛇身和食物
+        for pos in self.snake_body:
+            pygame.draw.rect(game_window, GREEN, pygame.Rect(pos[0], pos[1], 10, 10))
+        pygame.draw.rect(game_window, WHITE, pygame.Rect(self.food_position[0], self.food_position[1], 10, 10))
+        
+        # 显示分数
+        self.show_score(1)
+        
+        pygame.display.update()
+
+    def run(self):
+        """游戏主循环"""
+        running = True
+        while running:
+            if self.game_over_flag:
+                self.game_over()
+                # 游戏结束后等待用户按键，不自动重置
+                for event in pygame.event.get():
+                    if event.type == pygame.QUIT:
+                        running = False
+                    if event.type == pygame.KEYDOWN and event.key == pygame.K_c:
+                        self.reset_game()
+            else:
+                running = self.handle_events()
+                if not running:
+                    break
+                    
+                self.update_speed()
+                self.validate_direction()
+                self.move_snake()
+                self.draw()
+            
+            FPS.tick(self.speed)
+            
+        pygame.quit()
+
+if __name__ == "__main__":
+    game = SnakeGame()
+    game.run()