关于pygame的问题

yuki0nagato

零基础学python的pygame碰撞检测的课件内容,自己打了一遍发现有个问题:

1. import pygame
   
2. import sys
   
3. import random
   
4. from pygame.locals import *
   
5. 
   
6. class Ball(pygame.sprite.Sprite):
   
7. 
   
8.     def __init__(self, image, position, speed, bg_size):
   
9.         self.image = pygame.image.load(image).convert_alpha()
   
10.         self.rect = self.image.get_rect()
    
11.         self.rect.left, self.rect.top = position
    
12.         self.speed = speed
    
13.         self.width, self.height = bg_size
    
14.         self.radius = self.rect.width / 2
    
15.         pygame.sprite.Sprite.__init__(self) #sprite
    
16. 
    
17.     def move(self):
    
18.         self.rect = self.rect.move(self.speed) ##移动放在前面就不会
    
19.         
    
20.         if self.rect.right < 0:
    
21.             self.rect.left = self.width
    
22.         elif self.rect.left > self.width:
    
23.             self.rect.right = 0
    
24.         elif self.rect.top > self.height:
    
25.             self.rect.bottom = 0
    
26.         elif self.rect.bottom < 0:
    
27.             self.rect.top = self.height
    
28.       
    
29.         ## self.rect = self.rect.move(self.speed) 如果把移动放在判断后面会出现两个小球难分难解的情况
    
30.         
    
31. 
    
32. def main():
    
33.     pygame.init()
    
34. 
    
35.     image = 'gray_ball.png'
    
36.     bg = 'background.png'
    
37. 
    
38.     runing = True
    
39. 
    
40.    
    
41.     bg_size = width, height = 1024, 681
    
42. 
    
43.     screen = pygame.display.set_mode(bg_size)
    
44.     pygame.display.set_caption('Play the ball')
    
45.     background = pygame.image.load(bg).convert_alpha()
    
46.    
    
47.     clock = pygame.time.Clock()
    
48.     balls = []
    
49.     group = pygame.sprite.Group()
    
50.     for each in range(5):
    
51.         position = random.randint(0, width-100), random.randint(0, height-100)
    
52.         speed = [random.randint(-5, 5), random.randint(-5, 5)]
    
53.         ball = Ball(image, position, speed, bg_size)
    
54.         while pygame.sprite.spritecollide(ball, group, False, pygame.sprite.collide_circle):
    
55.             ball.rect.left, ball.rect.top = random.randint(0, width-100), random.randint(0, height-100)
    
56.         balls.append(ball)
    
57.         group.add(ball)
    
58.         
    
59.     while runing:
    
60.         for event in pygame.event.get():
    
61.             if event.type == QUIT:
    
62.                 sys.exit()
    
63. 
    
64.         screen.blit(background, (0, 0))
    
65.         for each_ball in balls:
    
66.             screen.blit(each_ball.image, each_ball.rect)
    
67.             each_ball.move()
    
68. 
    
69.         for each in group:
    
70.             group.remove(each)
    
71.             if pygame.sprite.spritecollide(each, group, False, pygame.sprite.collide_circle):
    
72.                 each.speed[0] = -each.speed[0]
    
73.                 each.speed[1] = -each.speed[1]
    
74.             group.add(each)
    
75.         pygame.display.flip()
    
76.         clock.tick(120)
    
77. 
    
78. if __name__ == '__main__':
    
79.     main()
    

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yuki0nagato

想知道造成难解难分的原因