一个完整的贪吃蛇python

以下是一个简单的贪吃蛇游戏的Python实现。它使用了Pygame库来创建游戏窗口和处理用户输入、游戏逻辑等。

import pygame
import random
 
# 初始化Pygame
pygame.init()
 
# 定义颜色
BLACK = pygame.Color(0, 0, 0)
WHITE = pygame.Color(255, 255, 255)
RED = pygame.Color(255, 0, 0)
GREEN = pygame.Color(0, 255, 0)
BLUE = pygame.Color(0, 0, 255)
 
# 设置游戏窗口大小
WINDOW_WIDTH = 800
WINDOW_HEIGHT = 600
WINDOW_SURFACE = pygame.display.set_mode((WINDOW_WIDTH, WINDOW_HEIGHT))
pygame.display.set_caption('Greedy Snake')
 
# 设置游戏时钟
CLOCK = pygame.time.Clock()
 
# 定义贪吃蛇的初始位置和大小
SNAKE_BLOCK_SIZE = 20
INITIAL_SNAKE_LENGTH = 3
INITIAL_SNAKE_POSITION = [
    (WINDOW_WIDTH / 2, WINDOW_HEIGHT / 2 + SNAKE_BLOCK_SIZE * i)
    for i in range(INITIAL_SNAKE_LENGTH)
]
 
# 定义食物的初始位置和大小
FOOD_BLOCK_SIZE = 20
FOOD_POSITION = (random.randint(0, WINDOW_WIDTH - FOOD_BLOCK_SIZE),
                 random.randint(0, WINDOW_HEIGHT - FOOD_BLOCK_SIZE))
 
# 定义贪吃蛇的移动速度
SNAKE_SPEED = 5
 
# 定义贪吃蛇的初始方向
DIRECTION_UP = 'up'
DIRECTION_DOWN = 'down'
DIRECTION_LEFT = 'left'
DIRECTION_RIGHT = 'right'
INITIAL_DIRECTION = DIRECTION_UP
 
# 定义贪吃蛇的初始分数
INITIAL_SCORE = 0
 
 
def draw_block(color, position):
    """绘制一个方块"""
    block_rect = pygame.Rect(position[0], position[1], SNAKE_BLOCK_SIZE, SNAKE_BLOCK_SIZE)
    pygame.draw.rect(WINDOW_SURFACE, color, block_rect)
 
 
def draw_snake(snake_blocks):
    """绘制贪吃蛇"""
    for block in snake_blocks:
        draw_block(GREEN, block)
 
 
def move_snake(snake_blocks, direction):
    """移动贪吃蛇"""
    head_position = snake_blocks[0]
 
    if direction == DIRECTION_UP:
        new_head_position = (head_position[0], head_position[1] - SNAKE_BLOCK_SIZE)
    elif direction == DIRECTION_DOWN:
        new_head_position = (head_position[0], head_position[1] + SNAKE_BLOCK_SIZE)
    elif direction == DIRECTION_LEFT:
        new_head_position = (head_position[0] - SNAKE_BLOCK_SIZE, head_position[1])
    elif direction == DIRECTION_RIGHT:
        new_head_position = (head_position[0] + SNAKE_BLOCK_SIZE, head_position[1])
 
    snake_blocks.insert(0, new_head_position)
    snake_blocks.pop()
 
 
def generate_food_position():
    """生成新的食物位置"""
    return (random.randint(0, WINDOW_WIDTH - FOOD_BLOCK_SIZE),
            random.randint(0, WINDOW_HEIGHT - FOOD_BLOCK_SIZE))
 
 
def draw_food(food_position):
    """绘制食物"""
    draw_block(RED, food_position)
 
 
def check_collision(snake_blocks, food_position):
    """检查碰撞"""
    if snake_blocks[0][0] == food_position[0] and snake_blocks[0][1] == food_position[1]:
        snake_blocks.append(snake_blocks[-1])
        return True
    return False
 
 
def check_game_over(snake_blocks):
    """检查游戏是否结束"""
    if snake_blocks[0][0] < 0 or snake_blocks[0][0] >= WINDOW_WIDTH or \
            snake_blocks[0][1] < 0 or snake_blocks[0][1] >= WINDOW_HEIGHT:
        return True
 
    for block in snake_blocks[1:]:
        if snake_blocks[0][0] == block[0] and snake_blocks[0][1] == block[1]:
            return True
 
    return False
 
 
def show_game_over():
    """显示游戏结束界面"""
    font = pygame.font.SysFont('arial', 36)
    text_surface = font.render('Game Over!', True, WHITE)
    text_rect = text_surface.get_rect()
    text_rect.center = (WINDOW_WIDTH / 2, WINDOW_HEIGHT / 2)
    WINDOW_SURFACE.blit(text_surface, text_rect)
    pygame.display.update()
 
 
def game():
    """游戏主循环"""
    snake_blocks = INITIAL_SNAKE_POSITION.copy()
    direction = INITIAL_DIRECTION
    score = INITIAL_SCORE
 
    while True:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                pygame.quit()
                quit()
            elif event.type == pygame.KEYDOWN:
                if event.key == pygame.K_UP and direction != DIRECTION_DOWN:
                    direction = DIRECTION_UP
                elif event.key == pygame.K_DOWN and direction != DIRECTION_UP:
                    direction = DIRECTION_DOWN
                elif event.key == pygame.K_LEFT and direction != DIRECTION_RIGHT:
                    direction = DIRECTION_LEFT
                elif event.key == pygame.K_RIGHT and direction != DIRECTION_LEFT:
                    direction = DIRECTION_RIGHT
 
        WINDOW_SURFACE.fill(BLACK)
 
        draw_snake(snake_blocks)
        draw_food(FOOD_POSITION)
 
        if check_collision(snake_blocks, FOOD_POSITION):
            FOOD_POSITION = generate_food_position()
            score += 10
 
        move_snake(snake_blocks, direction)
 
        if check_game_over(snake_blocks):
            show_game_over()
            pygame.time.wait(2000)
            return
 
        font = pygame.font.SysFont('arial', 24)
        score_surface = font.render('Score: %d' % score, True, WHITE)
        score_rect = score_surface.get_rect()
        score_rect.topleft = (10, 10)
        WINDOW_SURFACE.blit(score_surface, score_rect)
 
        pygame.display.update()
 
        CLOCK.tick(SNAKE_SPEED)
 
 
if __name__ == '__main__':
    game()

这个实现并不完美，但它可以让你了解如何使用Pygame来创建一个简单的游戏，并且它提供了一个良好的起点，可以用来构建更复杂的游戏。