貪吃蛇小遊戲

100行代碼實現貪吃蛇小遊戲

參考連接：https://mp.weixin.qq.com/s/fDcr1SfcbynLzHye7Q7VOg

github源碼下載：

https://github.com/lllmy/snakeGames

基本準備：

　　首先，咱們須要安裝pygame庫，小編經過pip install pygame，很快就安裝好了。在完成貪吃蛇小遊戲的時候，咱們須要知道整個遊戲分爲四部分：

1. 遊戲顯示：遊戲界面、結束界面

2. 貪吃蛇：頭部、身體、食物判斷、死亡判斷

3. 樹莓：隨機生成

4. 按鍵控制：上、下、左、右

主要代碼：

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

# 定義顏色變量
redColour = pygame.Color(255, 0, 0)
blackColour = pygame.Color(0, 0, 0)
whiteColour = pygame.Color(255, 255, 255)
greyColour = pygame.Color(150, 150, 150)


# 定義gameOver函數
def gameOver(playSurface, score):
    gameOverFont = pygame.font.SysFont("arial.ttf", 54) # 遊戲結束字體和大小
    # 遊戲結束界面，顯示"Game Over"和所得的分數
    gameOverSurf = gameOverFont.render("Game Over", True, greyColour) # 小遊戲結束內容顯示
    gameOverRect = gameOverSurf.get_rect()
    gameOverRect.midtop = (300, 10) #顯示位置
    playSurface.blit(gameOverSurf, gameOverRect)
    scoreFont = pygame.font.SysFont("arial.ttf", 54)  # 得分狀況顯示
    scoreSurf = scoreFont.render("Score:" + str(score), True, greyColour)
    scoreRect = scoreSurf.get_rect()
    scoreRect.midtop = (300, 50)
    playSurface.blit(scoreSurf, scoreRect)
    pygame.display.flip()   # 刷新顯示界面
    time.sleep(5)     # 休眠五秒鐘自動退出界面
    pygame.quit()
    sys.exit()


def main():
    # 初始化pygame
    pygame.init()
    fpsClock = pygame.time.Clock()
    # 建立pygame顯示層
    playSurface = pygame.display.set_mode((600, 460))   #窗口大小
    pygame.display.set_caption("Snake Game")          # 窗口名稱
    # 初始化變量
    snakePosition = [100, 100]  # 貪吃蛇 蛇頭的位置
    snakeSegments = [[100, 100]]  # 貪吃蛇 蛇的身體，初始爲一個單位
    raspberryPosition = [300, 300]  # 樹莓的初始位置
    raspberrySpawned = 1  # 樹莓的個數爲1
    direction = 'right'  # 初始方向爲右
    changeDirection = direction
    score = 0  # 初始得分
    while True:
        # 檢測例如按鍵等pygame事件
        for event in pygame.event.get():
            if event.type == QUIT:
                pygame.quit()
                sys.exit()
            elif event.type == KEYDOWN:
                # 判斷鍵盤事件
                if event.key == K_RIGHT or event.key == ord('d'):
                    changeDirection = 'right'
                if event.key == K_LEFT or event.key == ord('a'):
                    changeDirection = 'left'
                if event.key == K_UP or event.key == ord('w'):
                    changeDirection = 'up'
                if event.key == K_DOWN or event.key == ord('s'):
                    changeDirection = 'down'
                if event.key == K_ESCAPE:
                    pygame.event.post(pygame.event.Event(QUIT))
        # 判斷是否輸入了反方向
        if changeDirection == 'right' and not direction == 'left':
            direction = changeDirection
        if changeDirection == 'left' and not direction == 'right':
            direction = changeDirection
        if changeDirection == 'up' and not direction == 'down':
            direction = changeDirection
        if changeDirection == 'down' and not direction == 'up':
            direction = changeDirection
            # 根據方向移動蛇頭的座標
        if direction == 'right':
            snakePosition[0] += 20
        if direction == 'left':
            snakePosition[0] -= 20
        if direction == 'up':
            snakePosition[1] -= 20
        if direction == 'down':
            snakePosition[1] += 20
        # 增長蛇的長度
        snakeSegments.insert(0, list(snakePosition))
        # 判斷是否吃掉了樹莓
        if snakePosition[0] == raspberryPosition[0] and snakePosition[1] == raspberryPosition[1]:
            raspberrySpawned = 0
        else:
            snakeSegments.pop()
        # 若是吃掉樹莓，則從新生成樹莓
        if raspberrySpawned == 0:
            x = random.randrange(1, 30)
            y = random.randrange(1, 23)
            raspberryPosition = [int(x * 20), int(y * 20)]
            raspberrySpawned = 1
            score += 1
        # 繪製pygame顯示層
        playSurface.fill(blackColour)
        for position in snakeSegments:
            pygame.draw.rect(playSurface, whiteColour, Rect(position[0], position[1], 20, 20))
            pygame.draw.rect(playSurface, redColour, Rect(raspberryPosition[0], raspberryPosition[1], 20, 20))
        # 刷新pygame顯示層
        pygame.display.flip()
        # 判斷是否死亡
        if snakePosition[0] > 600 or snakePosition[0] < 0:
            gameOver(playSurface, score)
        if snakePosition[1] > 460 or snakePosition[1] < 0:
            gameOver(playSurface, score)
        for snakeBody in snakeSegments[1:]:
            if snakePosition[0] == snakeBody[0] and snakePosition[1] == snakeBody[1]:
                gameOver(playSurface, score)
        # 控制遊戲速度
        fpsClock.tick(5)


if __name__ == "__main__":
    main()

 界面展現：