基于Pygame實現(xiàn)簡單的貪吃蛇游戲

更新時間：2021年12月07日 15:27:16 作者：我的天才女友

Pygame是一個專門用來開發(fā)游戲的Python模塊，主要用于開發(fā)、設(shè)計?2D?電子游戲。本文主要為大家介紹了通過Pygame制作一個簡單的貪吃蛇游戲，感興趣的同學(xué)可以關(guān)注一下

導(dǎo)入相關(guān)的包

import pygame, sys, random
from pygame.locals import *

設(shè)置屏幕大小以及基本參數(shù)

設(shè)置屏幕大小為400*400，mainClock = pygame.time.Clock()用來設(shè)置時間同步，不會根據(jù)計算機(jī)的運行來決定運行多少次， mainClock.tick(1) 一秒只會運行一次，設(shè)置了屏幕的底色為白色。

# 定義屏幕的寬高
WIDTH = 400
HEIGHT = 400
# 初始化屏幕 設(shè)置窗口標(biāo)題
surface = pygame.display.set_mode((WIDTH, HEIGHT), 0, 32)
pygame.display.set_caption('貪吃蛇')

pygame.init()
mainClock = pygame.time.Clock()

# 定義使用的顏色
BLACK = (0, 0, 0)
GREEN = (0, 255, 0)
WHITE = (255, 255, 255)


while True:
    for event in pygame.event.get():
        if event.type == QUIT:
            pygame.quit()
            sys.exit()

    surface.fill(WHITE)
    pygame.display.update()
    mainClock.tick(1)

設(shè)置貪吃蛇的位置，以及移動的大小

這里設(shè)置了貪吃蛇的長度和起始位置，和食物和蛇的寬度，這里必須設(shè)置為可以被食物和蛇的寬度整除的數(shù)，這樣才能保證蛇能到任意的位置

# 設(shè)置蛇的初始長度
snakeWidth = 4
# 設(shè)置蛇的起始位置為（40，40）
snakeX = 40
snakeY = 40
# 食物和蛇的寬度設(shè)置為8
FOODSNAKEWIDTH = 8
# 定義四個方向
moveLeft = False
moveRight = False
moveUp = False
moveDown = False
# 定義初始的方向
moveRight = True


def getSnake():
    # 設(shè)置蛇的初始長度為4,并設(shè)置蛇的初始位置為(40,40)
    # 因為貪吃蛇會拐彎，所以將蛇設(shè)置為一個列表
    snake = []
    for i in range(snakeWidth):
        snake.append(pygame.Rect(snakeX + i * FOODSNAKEWIDTH, snakeY, FOODSNAKEWIDTH, FOODSNAKEWIDTH))
    return snake


# 貪吃蛇
snake = getSnake()

繪制蛇

surface.fill(WHITE)
for s in snake:
    pygame.draw.rect(surface, BLACK, s)

讓蛇動起來

這里將蛇列表最后一位移除，然后將第一位的位置根據(jù)方向加減坐標(biāo)

    snake.pop()
    newTop = copy.deepcopy(snake[0])
    # 改變蛇的位置
    if moveRight:
        newTop.left += FOODSNAKEWIDTH
    if moveLeft:
        newTop.left -= FOODSNAKEWIDTH
    if moveUp:
        newTop.top -= FOODSNAKEWIDTH
    if moveDown:
        newTop.top += FOODSNAKEWIDTH

    snake.insert(0, newTop)

這樣會有一個問題，如果超出屏幕呢，我們將超出屏幕，那么就會消失，我們只需要你移動第一個元素的時候，如果超出則將元素移動另一個位置。

    # 改變蛇的位置
    if moveRight:
        if newTop.right == WIDTH:
            newTop.left = 0
        else:
            newTop.left += FOODSNAKEWIDTH
    if moveLeft:
        if newTop.left == 0:
            newTop.right == WIDTH
        else:
            newTop.left -= FOODSNAKEWIDTH
    if moveUp:
        if newTop.top == 0:
            newTop.bottom = HEIGHT
        else:
            newTop.top -= FOODSNAKEWIDTH
    if moveDown:
        if newTop.bottom == HEIGHT:
            newTop.top = 0
        else:
            newTop.top += FOODSNAKEWIDTH

實現(xiàn)貪吃蛇拐彎

為了實現(xiàn)對應(yīng)的功能，我們將方向變量改為一個變量，這樣我們方便修改方向

# 定義四個方向
# moveLeft moveRight moveUp moveDown
# 定義初始的方向
snakeDirection = "moveRight"
  ----
  省略的代碼
  ----
    for event in pygame.event.get():
        if event.type == QUIT:
            pygame.quit()
            sys.exit()
        if event.type == KEYDOWN:
            if event.key == K_LEFT:
                if snakeDirection == "moveRight":
                    snake.reverse()
                snakeDirection = "moveLeft"
            if event.key == K_RIGHT:
                if snakeDirection == "moveLeft":
                    snake.reverse()
                snakeDirection = "moveRight"
            if event.key == K_UP:
                if snakeDirection == "moveDown":
                    snake.reverse()
                snakeDirection = "moveUp"
            if event.key == K_DOWN:
                if snakeDirection == "moveUp":
                    snake.reverse()
                snakeDirection = "moveDown"

為了方便看到效果，我將mainClock.tick(1) 設(shè)置為mainClock.tick(3)

實現(xiàn)隨機(jī)食物

這里用了很啰嗦的代碼，我自己也看不下去，有點含糊，這里為了簡單只設(shè)計了一個食物，遍歷屏幕上不是貪吃蛇的可以放食物的集合，然后隨機(jī)生成一個食物。

    if len(foods) < foodnum:

        canFoodColl = []
        # 獲取當(dāng)前不是貪吃蛇的位置集合
        for x in range(sizeNum):
            for y in range(sizeNum):
                foodExist = True
                for sn in snake:
                    if x * FOODSNAKEWIDTH == sn.left and y * FOODSNAKEWIDTH == sn.top:
                        foodExist = False
                        break
                if foodExist:
                    canFoodColl.append({'x': x, 'y': y})
        f = canFoodColl[random.randint(0, len(canFoodColl))]
        foods.append(pygame.Rect(f['x'], f['y'], FOODSNAKEWIDTH, FOODSNAKEWIDTH))

吃食物

這里用 colliderect判斷二者是否相撞，然后食物集合置空，不減去貪吃蛇集合的最后一個元素。

    if len(foods) < foodnum:

        canFoodColl = []
        # 獲取當(dāng)前不是貪吃蛇的位置集合
        for x in range(sizeNum):
            for y in range(sizeNum):
                foodExist = True
                for sn in snake:
                    if x * FOODSNAKEWIDTH == sn.left and y * FOODSNAKEWIDTH == sn.top:
                        foodExist = False
                        break
                if foodExist:
                    canFoodColl.append({'x': x, 'y': y})
        f = canFoodColl[random.randint(0, len(canFoodColl))]
        foods.append(pygame.Rect(f['x'] * FOODSNAKEWIDTH, f['y'] * FOODSNAKEWIDTH, FOODSNAKEWIDTH, FOODSNAKEWIDTH))
        print(f['x'])
        print(f['y'])
    else:
        if newTop.colliderect(foods[0]):
            foods = []
            eatFlg = True
        print('xxx')

完整代碼?

import pygame, sys, random
from pygame.locals import *
import copy

# 定義屏幕的寬高
WIDTH = 400
HEIGHT = 400
# 初始化屏幕 設(shè)置窗口標(biāo)題
surface = pygame.display.set_mode((WIDTH, HEIGHT), 0, 32)
pygame.display.set_caption('貪吃蛇')

pygame.init()
mainClock = pygame.time.Clock()

# 定義使用的顏色
BLACK = (0, 0, 0)
GREEN = (0, 255, 0)
WHITE = (255, 255, 255)

# 設(shè)置蛇的初始長度
snakeWidth = 4
# 設(shè)置蛇的起始位置為（40，40）
snakeX = 40
snakeY = 40
# 食物和蛇的寬度設(shè)置為8
FOODSNAKEWIDTH = 8
# 定義四個方向
# moveLeft moveRight moveUp moveDown
# 定義初始的方向
snakeDirection = "moveRight"

# 食物區(qū)間
foods = []
# 用去寬度處以對應(yīng)的 大小，減去1 就是食物矩形起點可以存在的區(qū)間
#sizeNum = HEIGHT / FOODSNAKEWIDTH - 1
# 這里為了減少計算
sizeNum = 39
# 為了簡單我們只設(shè)置一個食物
foodnum = 1


def getSnake():
    # 設(shè)置蛇的初始長度為4,并設(shè)置蛇的初始位置為(40,40)
    # 因為貪吃蛇會拐彎，所以將蛇設(shè)置為一個列表
    snake = []
    for i in range(snakeWidth):
        snake.append(pygame.Rect(snakeX + i * FOODSNAKEWIDTH, snakeY, FOODSNAKEWIDTH, FOODSNAKEWIDTH))
    return snake


# 貪吃蛇
snake = getSnake()

while True:

    for event in pygame.event.get():
        if event.type == QUIT:
            pygame.quit()
            sys.exit()
        if event.type == KEYDOWN:
            if event.key == K_LEFT:
                if snakeDirection == "moveRight":
                    snake.reverse()
                snakeDirection = "moveLeft"
            if event.key == K_RIGHT:
                if snakeDirection == "moveLeft":
                    snake.reverse()
                snakeDirection = "moveRight"
            if event.key == K_UP:
                if snakeDirection == "moveDown":
                    snake.reverse()
                snakeDirection = "moveUp"
            if event.key == K_DOWN:
                if snakeDirection == "moveUp":
                    snake.reverse()
                snakeDirection = "moveDown"
    surface.fill(WHITE)
    for s in snake:
        pygame.draw.rect(surface, BLACK, s)
    for f in foods:
        pygame.draw.rect(surface, GREEN, f)
    pygame.display.update()


    # 是否吃了食物
    eatFlg = False

    newTop = copy.deepcopy(snake[0])
    # 改變蛇的位置
    if snakeDirection == "moveRight":
        if newTop.right == WIDTH:
            newTop.left = 0
        else:
            newTop.left += FOODSNAKEWIDTH
    if snakeDirection == "moveLeft":
        if newTop.left == 0:
            newTop.right = WIDTH
        else:
            newTop.left -= FOODSNAKEWIDTH
    if snakeDirection == "moveUp":
        if newTop.top == 0:
            newTop.bottom = HEIGHT
        else:
            newTop.top -= FOODSNAKEWIDTH
    if snakeDirection == "moveDown":
        if newTop.bottom == HEIGHT:
            newTop.top = 0
        else:
            newTop.top += FOODSNAKEWIDTH

    if len(foods) < foodnum:

        canFoodColl = []
        # 獲取當(dāng)前不是貪吃蛇的位置集合
        for x in range(sizeNum):
            for y in range(sizeNum):
                foodExist = True
                for sn in snake:
                    if x * FOODSNAKEWIDTH == sn.left and y * FOODSNAKEWIDTH == sn.top:
                        foodExist = False
                        break
                if foodExist:
                    canFoodColl.append({'x': x, 'y': y})
        f = canFoodColl[random.randint(0, len(canFoodColl))]
        foods.append(pygame.Rect(f['x'] * FOODSNAKEWIDTH, f['y'] * FOODSNAKEWIDTH, FOODSNAKEWIDTH, FOODSNAKEWIDTH))
        print(f['x'])
        print(f['y'])
    else:
        if newTop.colliderect(foods[0]):
            foods = []
            eatFlg = True
        print('xxx')



    snake.insert(0, newTop)
    if not eatFlg:
        snake.pop()

    mainClock.tick(3)

以上就是基于Pygame實現(xiàn)簡單的貪吃蛇游戲的詳細(xì)內(nèi)容，更多關(guān)于Pygame 貪吃蛇游戲的資料請關(guān)注腳本之家其它相關(guān)文章！

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