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140行Python代码实现Flippy Bird

HoLoong 人气:0
# 140行代码实现Flippy Bird 话说这游戏中文名叫什么来着,死活想不起来了,算了话不多说,140行实现小游戏系列第二章,依然是简单小游戏,与数独游戏相比,在游戏界面显示上更难一些,但是在逻辑方面更简单一些,需要处理的无非是速度、加速度、时间、位置、碰撞检测,界面方面则要实现整个动态的显示; 依旧在最后会给出全部代码,不过依然可以从我的[Github仓库](https://github.com/NemoHoHaloAi/Game/tree/master/FlippyBird)Fork下来直接运行,图片资源也在那里,have fun. 运行以及玩法: 1. python main.py运行游戏; 2. 鼠标点击是暂停,再点击则是继续; 3. 空格键进行跳跃; 后续扩展: 1. 管道的出现可以更加随机,包括位置和长度等,目前是很简单的方式出现; 2. 游戏速度可以越来越快,目前是固定的; 3. 小鸟的自由落体速度、跳跃速度等需要优化,目前操作感觉没有那么流畅; 4. 增加计分系统、开始、重来等按钮; ## 小鸟图,需要的自取 ![](https://img2020.cnblogs.com/blog/666842/202004/666842-20200405171810189-169155264.png) ## 游戏截图 ### 进行中 ![](https://img2020.cnblogs.com/blog/666842/202004/666842-20200405172446044-2141336537.png) ### 暂停时 ![](https://img2020.cnblogs.com/blog/666842/202004/666842-20200405172450800-1228389787.png) ### 死亡时 ![](https://img2020.cnblogs.com/blog/666842/202004/666842-20200405172511612-1620237802.png) ## 关键代码分析 ### 随时间移动的管道 可以看到对于这个游戏,实际上移动的是管道而不是小鸟,因此这里主要是处理管道绘制的位置变化,以及整个一个循环的过程,如果屏幕上显示的管道是N个,那么可以想象是N+2个管道在不停地转圈圈出现在我们的界面上就行了; ```python tunnel_list = [x-speed if x-speed>-200 else 2100 for x in tunnel_list ] def draw_tunnel(): for x in tunnel_list: pygame.draw.rect(screen,COLORS['darkgreen'],(x,0,100,350),0) pygame.draw.rect(screen,COLORS['darkgreen'],(x+100,550,100,350),0) ``` ### 自由落体的小鸟和点击空格后跳起 不操作的情况下,小鸟的上下移动是做自由落体,也就是越来越快的下降的过程,而当我们点击`空格`进行跳跃后,实际上改变的就是小鸟的当前速度,因此小鸟会向上越来越慢的跳跃,直到速度为0后,继续下降,符合基本的物理规则; ```python G = 9.8*30 # g JUMP_V = -300 bird_x,bird_y = 700,450 bird_v = 0 if not jump: bird_v += G*frame else: bird_v = JUMP_V jump = False bird_y += frame*bird_v def draw_bird(): screen.blit(birdImg,[bird_x,bird_y]) ``` ### 碰撞检测 检测小鸟是否碰到管道或者是掉到地上,这么说是只无脚鸟咯,实际上就是检测两个矩形是否有重叠的部分; ```python def rect_cover(rect1,rect2,up=True): # bird left_up1 = (rect1[0],rect1[1]) left_down1 = (rect1[0],left_up1[1]+rect1[3]) right_up1 = (left_up1[0]+rect1[2],rect1[1]) right_down1 = (left_up1[0]+rect1[2],left_up1[1]+rect1[3]) # tunnel left_up2 = (rect2[0],rect2[1]) left_down2 = (rect2[0],left_up2[1]+rect2[3]) right_up2 = (left_up2[0]+rect2[2],rect2[1]) right_down2 = (left_up2[0]+rect2[2],left_up2[1]+rect2[3]) # check if (left_up2[0]<=right_up1[0]<=right_up2[0]): # x,肯定是右侧线接触,因此判断bird的right即可 if up and (left_up2[1]<=right_up1[1]<=left_down2[1]): return True elif (not up) and (left_up2[1]<=right_down1[1]<=left_down2[1]): return True return False ``` ### pygame绘制rect不支持透明度下实现的透明图层 看到,实际上是借助了Surface,将其设置为想要的透明度后blit到我们的screen上即可,直接draw rect是不支持RGBA的A设置alpha的,不知道为啥这么坑爹的设计; ```python def draw_dead(): s = pygame.Surface(SIZE, pygame.SRCALPHA) s.fill((255,255,255,240)) screen.blit(s, (0,0)) txt = font120.render('YOU DEAD',True,COLORS['black']) x,y = 450,400 screen.blit(txt,(x,y)) ``` ## 全部代码 ```python import sys import pygame from pygame.color import THECOLORS as COLORS def draw_background(): # white background screen.fill(COLORS['lightblue']) pygame.draw.rect(screen,COLORS['black'],(-100,902,3000,200),5) def draw_tunnel(): for x in tunnel_list: pygame.draw.rect(screen,COLORS['darkgreen'],(x,0,100,350),0) pygame.draw.rect(screen,COLORS['darkgreen'],(x+100,550,100,350),0) def draw_bird(): screen.blit(birdImg,[bird_x,bird_y]) def draw_context(): txt = font50.render('Count time: '+str(int(count_time))+' S',True,COLORS['black']) x,y = 10,920 screen.blit(txt,(x,y)) def draw_pause(): s = pygame.Surface(SIZE, pygame.SRCALPHA) s.fill((255,255,255,220)) screen.blit(s, (0,0)) txt = font120.render('PAUSE',True,COLORS['darkgray']) x,y = 550,400 screen.blit(txt,(x,y)) def draw_dead(): s = pygame.Surface(SIZE, pygame.SRCALPHA) s.fill((255,255,255,240)) screen.blit(s, (0,0)) txt = font120.render('YOU DEAD',True,COLORS['black']) x,y = 450,400 screen.blit(txt,(x,y)) def rect_cover(rect1,rect2,up=True): # bird left_up1 = (rect1[0],rect1[1]) left_down1 = (rect1[0],left_up1[1]+rect1[3]) right_up1 = (left_up1[0]+rect1[2],rect1[1]) right_down1 = (left_up1[0]+rect1[2],left_up1[1]+rect1[3]) # tunnel left_up2 = (rect2[0],rect2[1]) left_down2 = (rect2[0],left_up2[1]+rect2[3]) right_up2 = (left_up2[0]+rect2[2],rect2[1]) right_down2 = (left_up2[0]+rect2[2],left_up2[1]+rect2[3]) # check if (left_up2[0]<=right_up1[0]<=right_up2[0]): # x,肯定是右侧线接触,因此判断bird的right即可 if up and (left_up2[1]<=right_up1[1]<=left_down2[1]): return True elif (not up) and (left_up2[1]<=right_down1[1]<=left_down2[1]): return True return False def check_dead(): bird_rect = (bird_x,bird_y,70,70) if bird_rect[1]+bird_rect[3]>900: return True for x in tunnel_list: up_rect = (x,0,100,350) down_rect = (x+100,550,100,350) if rect_cover(bird_rect,up_rect) or rect_cover(bird_rect,down_rect,up=False): return True return False if __name__ == "__main__": # init pygame pygame.init() # contant SIZE = [1500,1000] font50 = pygame.font.SysFont('Times', 50) font120 = pygame.font.SysFont('Times', 120) G = 9.8*30 # g JUMP_V = -300 # brid birdPath = 'bird.png' birdImg = pygame.image.load(birdPath) # tunnel tunnel_list = [100,600,1100,1600,2100] # create screen 500*500 screen = pygame.display.set_mode(SIZE) # variable parameter bird_x,bird_y = 700,450 bird_v = 0 count_time = 0 # level speed = 5 frame = 0.02 # main loop running = True pause = False jump = False dead = False while running: for event in pygame.event.get(): if event.type == pygame.QUIT: running = False break elif event.type == pygame.MOUSEBUTTONDOWN: pause = not pause elif event.type == pygame.KEYUP: if chr(event.key) == ' ': jump = True # update data if not pause and not dead: count_time += frame tunnel_list = [x-speed if x-speed>-200 else 2100 for x in tunnel_list ] if not jump: bird_v += G*frame else: bird_v = JUMP_V jump = False bird_y += frame*bird_v # background draw_background() # tunnel draw_tunnel() # choose item draw_bird() # point draw_context() # pause if not dead and pause: draw_pause() # dead if dead: draw_dead() # flip pygame.display.flip() # pause 20ms pygame.time.delay(int(frame*1000)) # check win or not if check_dead(): #print('You dead, dumb ass!!!') #break dead = True pygame.quit() ``` ## 最后 数独和FlippyBird都在[这里](https://github.com/NemoHoHaloAi/Game),欢迎大家Fork下来直接运行,后续会不定期更新其他小游戏,目前以简单的动作小游戏、棋牌类为主,想到啥做啥,或者大家有什么想做想玩的可以评论区告诉我哈,搞得定的我会尽快完成; ## 最后的最后 大家可以到我的Github上看看有没有其他需要的东西,目前主要是自己做的机器学习项目、Python各种脚本工具、有意思的小项目以及Follow的大佬、Fork的项目等: https://github.com/NemoHoHaloAi

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