贪吃蛇 李承键

李承键

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import pygame
import random

# 初始化 Pygame
pygame.init()

# 颜色定义
white = (255, 255, 255)
black = (0, 0, 0)
red = (255, 0, 0)
green = (0, 255, 0)

# 屏幕尺寸
screen_width = 800
screen_height = 600
screen = pygame.display.set_mode((screen_width, screen_height))
pygame.display.set_caption('贪吃蛇游戏')

# 时钟用于控制帧率
clock = pygame.time.Clock()


class Snake:
    def __init__(self):
        self.size = 10
        self.speed = 15
        self.segments = [(screen_width // 2, screen_height // 2)]
        self.direction = "right"

    def move(self):
        x, y = self.segments[0]
        if self.direction == "right":
            x += self.size
        elif self.direction == "left":
            x -= self.size
        elif self.direction == "up":
            y -= self.size
        elif self.direction == "down":
            y += self.size
        self.segments.insert(0, (x, y))
        self.segments.pop()

    def draw(self):
        for segment in self.segments:
            pygame.draw.rect(screen, green, (segment[0], segment[1], self.size, self.size))

    def change_direction(self, direction):
        if direction == "right" and not self.direction == "left":
            self.direction = direction
        elif direction == "left" and not self.direction == "right":
            self.direction = direction
        elif direction == "up" and not self.direction == "down":
            self.direction = direction
        elif direction == "down" and not self.direction == "up":
            self.direction = direction


class Food:
    def __init__(self):
        self.size = 10
        self.x = round(random.randrange(0, screen_width - self.size) / 10.0) * 10.0
        self.y = round(random.randrange(0, screen_height - self.size) / 10.0) * 10.0

    def draw(self):
        pygame.draw.rect(screen, red, (self.x, self.y, self.size, self.size))


def main():
    snake = Snake()
    food = Food()
    game_over = False
    while not game_over:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                game_over = True
            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_RIGHT:
                    snake.change_direction("right")
                elif event.key == pygame.K_LEFT:
                    snake.change_direction("left")
                elif event.key == pygame.K_UP:
                    snake.change_direction("up")
                elif event.key == pygame.K_DOWN:
                    snake.change_direction("down")

        screen.fill(black)
        snake.move()
        snake.draw()
        food.draw()

        # 检查蛇是否吃到食物
        if snake.segments[0][0] == food.x and snake.segments[0][1] == food.y:
            food = Food()
            snake.segments.append(snake.segments[-1])

        # 检查蛇是否撞到边界或自己
        if (snake.segments[0][0] >= screen_width or snake.segments[0][0] < 0 or
                snake.segments[0][1] >= screen_height or snake.segments[0][1] < 0):
            game_over = True
        for segment in snake.segments[1:]:
            if snake.segments[0] == segment:
                game_over = True

        pygame.display.update()
        clock.tick(snake.speed)


if __name__ == "__main__":
    main()
    pygame.quit()