[已解决]关于小甲鱼“飞机大战”代码的问题

zhoujiachen1101

小甲鱼《零基础入门学习python》视频091，书p326中，定义了三个添加敌机的函数，每个函数需要三个参数。我想请问一下大家~为什么需要group1和group2两个参数，分别代表small_enemies和 enemies呢？我试了一下，如果只有一个group1参数（代表small_enemies）和一个num参数，似乎也是可以的，我有点搞不太懂，希望得到大家的指点~
def add_small_enemies(group1, group2, num):
    for i in range(num):
        e1 = enemy.SmallEnemy(bg_size)
        group1.add(e1)
        group2.add(e1)

def add_mid_enemies(group1, group2, num):
    for i in range(num):
        e2 = enemy.MidEnemy(bg_size)
        group1.add(e2)
        group2.add(e2)

def add_big_enemies(group1, group2, num):
    for i in range(num):
        e3 = enemy.BigEnemy(bg_size)
        group1.add(e3)
        group2.add(e3)

def main():
    ....
    enemies = pygame.sprite.Group()
    small_enemies = pygame.sprite.Group()
    add_small_enemies(small_enemies, enemies, 15)


完整代码：

1. import pygame
   
2. import sys
   
3. import traceback
   
4. import myplane
   
5. import enemy
   
6. from pygame.locals import *
   
7. 
   
8. pygame.init()
   
9. pygame.mixer.init()
   
10. 
    
11. bg_size = width, height = 480, 700
    
12. screen = pygame.display.set_mode(bg_size)
    
13. pygame.display.set_caption("飞机大战 -- FishC Demo")
    
14. 
    
15. background = pygame.image.load("images/background.png").convert()
    
16. 
    
17. pygame.mixer.music.load("sound/game_music.ogg")
    
18. pygame.mixer.music.set_volume(0.2)
    
19. bullet_sound = pygame.mixer.Sound("sound/bullet.wav")
    
20. bullet_sound.set_volume(0.2)
    
21. bomb_sound = pygame.mixer.Sound("sound/use_bomb.wav")
    
22. bomb_sound.set_volume(0.2)
    
23. supply_sound = pygame.mixer.Sound("sound/supply.wav")
    
24. supply_sound.set_volume(0.2)
    
25. get_bomb_sound = pygame.mixer.Sound("sound/get_bomb.wav")
    
26. get_bomb_sound.set_volume(0.2)
    
27. get_bullet_sound = pygame.mixer.Sound("sound/get_bullet.wav")
    
28. get_bullet_sound.set_volume(0.2)
    
29. upgrade_sound = pygame.mixer.Sound("sound/upgrade.wav")
    
30. upgrade_sound.set_volume(0.2)
    
31. enemy3_fly_sound = pygame.mixer.Sound("sound/enemy3_flying.wav")
    
32. enemy3_fly_sound.set_volume(0.2)
    
33. enemy1_down_sound = pygame.mixer.Sound("sound/enemy1_down.wav")
    
34. enemy1_down_sound.set_volume(0.1)
    
35. enemy2_down_sound = pygame.mixer.Sound("sound/enemy2_down.wav")
    
36. enemy2_down_sound.set_volume(0.2)
    
37. enemy3_down_sound = pygame.mixer.Sound("sound/enemy3_down.wav")
    
38. enemy3_down_sound.set_volume(0.5)
    
39. me_down_sound = pygame.mixer.Sound("sound/me_down.wav")
    
40. me_down_sound.set_volume(0.2)
    
41. 
    
42. def add_small_enemies(group1, group2, num):
    
43.     for i in range(num):
    
44.         e1 = enemy.SmallEnemy(bg_size)
    
45.         group1.add(e1)
    
46.         group2.add(e1)
    
47. 
    
48. def add_mid_enemies(group1, group2, num):
    
49.     for i in range(num):
    
50.         e2 = enemy.MidEnemy(bg_size)
    
51.         group1.add(e2)
    
52.         group2.add(e2)
    
53. 
    
54. def add_big_enemies(group1, group2, num):
    
55.     for i in range(num):
    
56.         e3 = enemy.BigEnemy(bg_size)
    
57.         group1.add(e3)
    
58.         group2.add(e3)
    
59. 
    
60. #定义main主函数
    
61. def main():
    
62.     pygame.mixer.music.play(-1)
    
63. 
    
64.     me = myplane.MyPlane(bg_size)
    
65. 
    
66.     clock = pygame.time.Clock()
    
67. 
    
68.     enemies = pygame.sprite.Group()
    
69. 
    
70.     small_enemies = pygame.sprite.Group()
    
71.     add_small_enemies(small_enemies, enemies, 15)
    
72. 
    
73.     mid_enemies = pygame.sprite.Group()
    
74.     add_mid_enemies(mid_enemies, enemies, 4)
    
75. 
    
76.     big_enemies = pygame.sprite.Group()
    
77.     add_big_enemies(big_enemies, enemies, 2)
    
78. 
    
79.     switch_image = True
    
80. 
    
81.     delay = 100
    
82. 
    
83.     running = True
    
84. 
    
85.     while running:
    
86.         for event in pygame.event.get():
    
87.             if event.type == QUIT:
    
88.                 pygame.quit()
    
89.                 sys.exit()
    
90. 
    
91.         key_pressed = pygame.key.get_pressed()
    
92.         if key_pressed[K_w] or key_pressed[K_UP]:
    
93.             me.moveUp()
    
94.         if key_pressed[K_s] or key_pressed[K_DOWN]:
    
95.             me.moveDown()
    
96.         if key_pressed[K_a] or key_pressed[K_LEFT]:
    
97.             me.moveLeft()
    
98.         if key_pressed[K_d] or key_pressed[K_RIGHT]:
    
99.             me.moveRight()
    
100. 
     
101.         screen.blit(background, (0, 0))
     
102. 
     
103.         switch_image = not switch_image
     
104.         if switch_image:
     
105.             screen.blit(me.image1, me.rect)
     
106.         else:
     
107.             screen.blit(me.image2, me.rect)
     
108. 
     
109.         for each in big_enemies:
     
110.             each.move()
     
111.             if switch_image:
     
112.                 screen.blit(each.image1, each.rect)
     
113.             else:
     
114.                 screen.blit(each.image2, each.rect)
     
115.             if each.rect.bottom > -50:
     
116.                 enemy3_fly_sound.play()
     
117. 
     
118.         # 绘制中型敌机：
     
119.         for each in mid_enemies:
     
120.             each.move()
     
121.             screen.blit(each.image, each.rect)
     
122. 
     
123.         # 绘制小型敌机：
     
124.         for each in small_enemies:
     
125.             each.move()
     
126.             screen.blit(each.image, each.rect)
     
127. 
     
128.         if not(delay % 5):
     
129.             switch_image = not switch_image
     
130. 
     
131.         delay -= 1
     
132.         if not delay:
     
133.             delay = 100
     
134. 
     
135.         pygame.display.flip()
     
136.         clock.tick(60)
     
137. 
     
138. if __name__ == "__main__":
     
139.     try:
     
140.         main()
     
141.     except SystemExit:
     
142.         pass
     
143.     except:
     
144.         traceback.print_exc()
     
145.         pygame.quit()
     
146.         input()

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最佳答案

月排行榜 / 总排行榜

塔利班

2018-12-8 23:42:31

add_small_enemies(small_enemies, enemies, 15)
small_enemies, enemies都是组，enemies是所有的飞机，有共性的比如碰撞我方飞机放一起检测

small_enemies是小飞机，专门控制小飞机的组

跳转到最佳答案楼层

塔利班

add_small_enemies(small_enemies, enemies, 15)
small_enemies, enemies都是组，enemies是所有的飞机，有共性的比如碰撞我方飞机放一起检测

small_enemies是小飞机，专门控制小飞机的组