原文：https://blog.c12th.cn/archives/39.html

Python 贪吃蛇(pygame)

前言

源代码参考B站: BV1cs411T7wW

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效果展示

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部分代码

• 框架

# 初始化
pygame.init()
W = 800
H = 600

ROW = 30
COL = 40

size = (W, H)
window = pygame.display.set_mode(size)
pygame.display.set_caption("贪吃蛇")

bg_color = (255, 255, 255)


# 绘制
def rect(point, color):
    left = point.col * W / COL
    top = point.row * H / ROW

    pygame.draw.rect(
        window, color,
        (left, top, W / COL, H / ROW)
    )
    pass


# 游戏循环
quit = True
while quit:
    # 处理事件
    for event in pygame.event.get():
        # print(event)      # 鼠标测试
        if event.type == pygame.QUIT:
            quit = False

    # 背景
    pygame.draw.rect(window, bg_color, (0, 0, W, H))

    pygame.display.flip()

• 小键盘

# 小键盘                                         # wasd
if event.key == 1073741906 or event.key == 82:  # if event.key==273 or event.key==119:
    if direct == "left" or direct == "right":
        direct = "up"
elif event.key == 1073741905 or event.key == 81:  # elif event.key==274 or event.key==115:
    if direct == "left" or direct == "right":
        direct = "down"
elif event.key == 1073741904 or event.key == 80:  # elif event.key==273 or event.key==119:
    if direct == "up" or direct == "down":
        direct = "left"
elif event.key == 1073741903 or event.key == 79:  # elif event.key==273 or event.key==119:
    if direct == "up" or direct == "down":
        direct = "right"

• 碰撞判定

# 碰撞判定
dead = False
# 撞墙
if head.col < 0 or head.row < 0 or head.col >= COL or head.row >= ROW:
    dead = True

# 撞自己
for snake in snakes:
    if head.col == snake.col and head.row == snake.row:
        dead = True
        break

# 死亡
if dead:
    print("game over")
    quit = False

• FPS

clock = pygame.time.Clock()

# FPS
clock.tick(20)

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完整代码

# 工程：test
# 创建时间：2024/8/2 19:05
# encoding:utf-8
# 源代码参考B站:BV1cs411T7wW

import pygame
import random


class Point:
    row = 0
    col = 0

    def __init__(self, row, col):
        self.row = row
        self.col = col

    def copy(self):
        return Point(row=self.row, col=self.col)


# 初始化
pygame.init()
W = 800
H = 600

ROW = 30
COL = 40

size = (W, H)
window = pygame.display.set_mode(size)
pygame.display.set_caption("贪吃蛇")

bg_color = (255, 255, 255)
snake_color = (255, 200, 200)

head = Point(row=int(ROW / 2), col=int(COL / 2))
head_color = (0, 128, 128)

snakes = [
    Point(row=head.row, col=head.col + 1),
    Point(row=head.row, col=head.col + 2),
    Point(row=head.row, col=head.col + 3),
]


# 生成食物
def gen_food():
    while 1:
        pos = Point(row=random.randint(0, ROW - 1), col=random.randint(0, COL - 1))

        is_coll = False

        # 碰撞
        if head.row == pos.row and head.col == pos.col:
            is_coll = True

        # 蛇身子
        for snake in snakes:
            if snake.row == pos.row and snake.col == pos.col:
                is_coll = True
                break

        if not is_coll:
            break

    return pos


# 食物
food = gen_food()
food_color = (0, 255, 0)

direct = "left"


# 绘制
def rect(point, color):
    left = point.col * W / COL
    top = point.row * H / ROW

    pygame.draw.rect(
        window, color,
        (left, top, W / COL, H / ROW)
    )
    pass


# 游戏循环
quit = True
clock = pygame.time.Clock()
while quit:
    # 处理事件
    for event in pygame.event.get():
        # print(event)      # 鼠标测试
        if event.type == pygame.QUIT:
            quit = False
        elif event.type == pygame.KEYDOWN:
            # print(event)      # 按键测试
            # 小键盘                                         # wasd
            if event.key == 1073741906 or event.key == 82:  # if event.key==273 or event.key==119:
                if direct == "left" or direct == "right":
                    direct = "up"
            elif event.key == 1073741905 or event.key == 81:  # elif event.key==274 or event.key==115:
                if direct == "left" or direct == "right":
                    direct = "down"
            elif event.key == 1073741904 or event.key == 80:  # elif event.key==273 or event.key==119:
                if direct == "up" or direct == "down":
                    direct = "left"
            elif event.key == 1073741903 or event.key == 79:  # elif event.key==273 or event.key==119:
                if direct == "up" or direct == "down":
                    direct = "right"

    # 吃东西
    eat = (head.row == food.row and head.col == food.col)

    # 食物刷新
    if eat:
        food = gen_food()
        print("蛇的长度:", len(snakes) + 1)  # 实时显示蛇的长度

    # 处理身子
    snakes.insert(0, head.copy())
    if not eat:
        snakes.pop()

    # 移动
    if direct == "left":
        head.col -= 1
    elif direct == "right":
        head.col += 1
    elif direct == "up":
        head.row -= 1
    elif direct == "down":
        head.row += 1

    # 碰撞判定
    dead = False
    # 撞墙
    if head.col < 0 or head.row < 0 or head.col >= COL or head.row >= ROW:
        dead = True

    # 撞自己
    for snake in snakes:
        if head.col == snake.col and head.row == snake.row:
            dead = True
            break

    # 死亡
    if dead:
        print("game over")
        quit = False

    # 背景
    pygame.draw.rect(window, bg_color, (0, 0, W, H))

    # 蛇头
    for snake in snakes:
        rect(snake, snake_color)
    rect(head, head_color)
    rect(food, food_color)

    pygame.display.flip()

    # FPS
    clock.tick(20)

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