Python学习笔记——用pygame编写小游戏

小咪咪 2022-05-23 12:55 212阅读 0赞

游戏功能：小球从屏幕顶端随机位置出现，垂直落下。鼠标左右键控制挡板左右移动，接住下落的小球。若没有接到则游戏失败，退出并显示分数。效果如图：

# ![70][]    #

代码如下：

#coding=utf-8
    import pygame
    from pygame.locals import *
    import sys
    import random
    
    
    BLACK =(0,0,0)
    WHITE = (255,255,255)
    bg_color = (0, 0, 70)# 背景颜色
    
    SCREEN_SIZE = [320,400]#屏幕大小
    BAR_SIZE = [20,5]#挡板大小
    BALL_SIZE = [15,15]#球的尺寸
    
    
    class Game(object):
        def __init__(self):
            pygame.init()
            self.clock = pygame.time.Clock()#定时器
            self.screen = pygame.display.set_mode(SCREEN_SIZE)
            pygame.display.set_caption('My Game')#设置标题
    
            #ball 初始位置
            self.ball_pos_x = SCREEN_SIZE[0]//2 - BALL_SIZE[0]/2
            self.ball_pos_y = 0
            #ball 移动方向
            #self.ball_dir_x = -1 #-1:left 1:right
            self.ball_dir_y = 1# 1:down
    
            self.ball_pos = pygame.Rect(self.ball_pos_x,self.ball_pos_y,BALL_SIZE[0],BALL_SIZE[1])
    
            self.score =0
            self.bar_pos_x = SCREEN_SIZE[0]//2 - BAR_SIZE[0]//2
            self.bar_pos = pygame.Rect(self.bar_pos_x,SCREEN_SIZE[1]-BAR_SIZE[1],BAR_SIZE[0],BALL_SIZE[1])
    
        def bar_move_left(self):#左移
            self.bar_pos_x = self.bar_pos_x - 2
    
        def bar_move_right(self):#右移
            self.bar_pos_x = self.bar_pos_x + 2
    
        def run(self):
            pygame.mouse.set_visible(0) #移动鼠标不可见
            bar_move_left =False
            bar_move_right = False
            while True:
                for event in pygame.event.get():
                    if event.type == QUIT: #当按下关闭按键
                        pygame.quit()
                        sys.exit()#接收到退出事件后退出程序
    
                    elif event.type == pygame.MOUSEBUTTONDOWN and event.button ==1:#鼠标左键按下
                        bar_move_left = True
                    elif event.type == pygame.MOUSEBUTTONUP and event.button == 1: #左键弹起
                        bar_move_left = False
                    elif event.type == pygame.MOUSEBUTTONDOWN and event.button == 3:#右键
                        bar_move_right = True
                    elif event.type == pygame.MOUSEBUTTONUP and event.button == 3:  #左键弹起
                        bar_move_right = False
    
                if bar_move_left == True and bar_move_right ==False:
                    self.bar_move_left()
                if bar_move_left == False and bar_move_right == True:
                    self.bar_move_right()
    
                self.screen.fill(bg_color)
                self.bar_pos.left = self.bar_pos_x
                pygame.draw.rect(self.screen, WHITE, self.bar_pos)
    
                ## 球移动
                self.ball_pos.bottom += self.ball_dir_y * 3
                pygame.draw.rect(self.screen, WHITE, self.ball_pos)
    
                ## 判断球是否落到板上
                if self.bar_pos.top <= self.ball_pos.bottom and (
                        self.bar_pos.left <= self.ball_pos.right and self.bar_pos.right >= self.ball_pos.left):
                    self.score += 1
                    print("Score: ", self.score, end='\r')
                elif self.bar_pos.top <= self.ball_pos.bottom and (
                        self.bar_pos.left > self.ball_pos.right or self.bar_pos.right < self.ball_pos.left):
                    print("Game Over: ", self.score)
                    return self.score
    
                ## 更新球下落的初始位置
                if self.bar_pos.top <= self.ball_pos.bottom:
                    self.ball_pos_x = random.randint(0, SCREEN_SIZE[0] - BALL_SIZE[0])
                    self.ball_pos_y = 0
                    self.ball_pos = pygame.Rect(self.ball_pos_x, self.ball_pos_y, BALL_SIZE[0], BALL_SIZE[1])
    
                pygame.display.update()#更新软件界面显示
                self.clock.tick(60)
    
    
    game = Game()
    game.run()#启动

[70]: /images/20220523/5257554f6ffa4caba371ad5b39471bfb.png