pygame 贪吃蛇（简易版）

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pygame 贪吃蛇（简易版）

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趁着寒假的时间自学了Python，就在b站上找了个视频做了一个贪吃蛇的小游戏，用到了pygame，IDE用的是pycharm。
没怎么根据视频做太大的改进，第一次接触pygame，很多东西还不是很了解，就当是一个练手的小游戏，以后再改进吧。

class Point():
    row = 0
    col = 0
    def __init__(self, row, col):
        self.row = row
        self.col = col

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

import pygame
import random

# 初始化
pygame.init()
W = 800  # 屏幕的宽
H = 600  # 屏幕的高

ROW = 30  # 几行
COL = 40  # 几列  每个格有多大

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

bg_color = (255, 255, 255)  # 背景颜色
snake_color = (150, 150, 150)  # 蛇身颜色

head = Point(int(ROW/2), int(COL/2))  # 蛇头
head_color = (0, 128, 128)

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


# 生成食物
def get_food():
    while True:
        pos = Point(random.randint(0, ROW - 1), random.randint(0, COL - 1))
        # 是否跟蛇碰上
        is_col = False
        if head.row == pos.row and head.col == pos.col:
            is_col = True
        for snake in snakes:
            if snake.row == pos.row and snake.col == pos.col:
                is_col = True
                break
        if not is_col:
            break
    return pos

# 定义坐标
food = get_food()
food_color = (255, 255, 0)


direct = 'left'  # 蛇移动方向  left, right, up, down

def rect(point, color):
    cell_width = W / COL  # 格子的宽度
    cell_height = H / ROW # 格子的高度

    left = point.col * cell_width
    top = point.row * cell_height
    pygame.draw.rect(window,color,(left,top,cell_width,cell_height))


# 游戏循环
quit = True
clock = pygame.time.Clock()

# 设置帧频，根据游戏的进程逐渐变快
frequency = 3

while quit:
    # 处理事件
    events = pygame.event.get()
    for event in events:
        if event.type == pygame.QUIT:
            quit = False
        elif event.type == pygame.KEYDOWN:  # 按键  上下左右  对应键值可以通过print(event)打出来
            if event.key == 273 or event.key == 119:
                if direct == 'left' or direct == 'right':
                    direct = 'up'
            elif event.key == 274 or event.key == 115:
                if direct == 'left' or direct == 'right':
                    direct = 'down'
            elif event.key == 276 or event.key == 97:
                if direct == 'up' or direct == 'down':
                    direct = 'left'
            elif event.key == 275 or event.key == 100:
                if direct == 'up' or direct == 'down':
                    direct = 'right'

    # 做自己的事

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

    if eat:
        food = get_food()
        frequency += 1
    # 处理身子
    # 1、把原来的头插入到snakes的头上
    snakes.insert(0,head.copy())
    # 2、把snakes的最后一个格子删掉
    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
    else:
        head.row += 1

    # 检测
    dead = False
    # 1、撞墙
    if head.col < 0 or head.row <0 or head.col >= COL or head.row >= ROW:
        dead = True
    # 2、撞自己
    for snake in snakes:
        if head.col == snake.col and head.row == snake.row:
            dead = True
            break
    if dead:
        print("游戏结束")
        quit = False
    # 渲染--画出来
    # 屏幕背景颜色绘制
    pygame.draw.rect(window,bg_color,(0,0,W,H))

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

    # 画食物
    rect(food, food_color)

    pygame.display.flip()    #  更新整个待显示的Surface 对象到屏幕上

    # 设置帧频
    clock.tick(frequency) # sleep(1000/60)