[已解决]逐渐透明问题

flyps

这次的问题是按下对应的键(a)角色无法逐渐透明了不明白是怎么回事，请各位帮忙看看，谢谢
代码如下：

1. import pygame
   
2. import sys
   
3. from pygame.locals import *
   
4. 
   
5. pygame.init()
   
6. er = True
   
7. w = True
   
8. running = True
   
9. size = width, height = 600, 400
   
10. screen = pygame.display.set_mode(size)
    
11. bmf = pygame.image.load('Chomper.gif').convert_alpha()
    
12. p = (300, 200)
    
13. bg = pygame.image.load('170731094492.jpg')
    
14. bgp = (0, 0)
    
15. 
    
16. def blit_alpha(t, t1, s, l, o):
    
17.     #print('正在调用函数中...')
    
18.     x = l[0]
    
19.     y = l[1]
    
20.     temp = pygame.Surface((s.get_width(), s.get_height())).convert()
    
21.     temp.blit(t1, (-x, -y))
    
22.     temp.blit(s, (0, 0))
    
23.     temp.set_alpha(o)
    
24.     t.blit(temp, l)
    
25. 
    
26. def rGraduallyTransparent(t, t1, s, l, n):
    
27.     z = n + 1
    
28.     for i in range(1, z):
    
29.         #print('执行中... x ', i)
    
30.         blit_alpha(t, t1, s, l, i)
    
31.         #print(f'此时blit_alpha的参数有{t}, {t1}, {s}, {l}, {i}')
    
32.         pygame.display.flip()
    
33.         pygame.time.delay(10)
    
34. 
    
35. def GraduallyTransparent(t, t1, s, l, n):
    
36.     z = n + 1
    
37.     for i in range(1, z, -1):
    
38.         print(1)
    
39.         blit_alpha(t, t1, s, l, i)
    
40.         #print(f'此时blit_alpha的参数有{t}, {t1}, {s}, {l}, {i}')
    
41.         pygame.display.flip()
    
42.         pygame.time.delay(10)
    
43. 
    
44. while True:   
    
45.     for event in pygame.event.get():
    
46.         if event.type == pygame.QUIT:
    
47.             sys.exit()
    
48.         screen.blit(bg, bgp)
    
49.         k = pygame.key.get_pressed()
    
50.         if k[K_q]:  
    
51.             rGraduallyTransparent(screen, bg, bmf, p, 100)
    
52.         if k[K_a]:
    
53.             GraduallyTransparent(screen, bg, bmf, p, 100)
    
54. 
    
55.         screen.blit(bmf, p)
    
56.         pygame.display.flip()

复制代码

最佳答案

月排行榜 / 总排行榜

FishC

2023-12-16 19:32:03

问题出在两个循环中的范围设置有误，应该从1到n+1。此外，应该将screen.blit(bg, bgp)和screen.blit(bmf, p)放在循环外面，否则会导致重复绘制背景和角色。修改后的代码如下：

1. import pygame
2. import sys
3. from pygame.locals import *
5. pygame.init()
6. er = True
7. w = True
8. running = True
9. size = width, height = 600, 400
10. screen = pygame.display.set_mode(size)
11. bmf = pygame.image.load('Chomper.gif').convert_alpha()
12. p = (300, 200)
13. bg = pygame.image.load('170731094492.jpg')
14. bgp = (0, 0)
16. def blit_alpha(t, t1, s, l, o):
17.     x = l
18.     y = l
19.     temp = pygame.Surface((s.get_width(), s.get_height())).convert()
20.     temp.blit(t1, (-x, -y))
21.     temp.blit(s, (0, 0))
22.     temp.set_alpha(o)
23.     t.blit(temp, l)
25. def rGraduallyTransparent(t, t1, s, l, n):
26.     z = n + 1
27.     for i in range(1, z):
28.         blit_alpha(t, t1, s, l, i)
29.         pygame.display.flip()
30.         pygame.time.delay(10)
32. def GraduallyTransparent(t, t1, s, l, n):
33.     z = n + 1
34.     for i in range(z, 1, -1):
35.         blit_alpha(t, t1, s, l, i)
36.         pygame.display.flip()
37.         pygame.time.delay(10)
39. while True:
40.     for event in pygame.event.get():
41.         if event.type == pygame.QUIT:
42.             sys.exit()
44.     screen.blit(bg, bgp)
45.     k = pygame.key.get_pressed()
46.     if k[K_a]:
47.         rGraduallyTransparent(screen, bg, bmf, p, 100)
48.         GraduallyTransparent(screen, bg, bmf, p, 100)
50.     screen.blit(bmf, p)
51.     pygame.display.flip()

复制代码

请注意，我也修复了if语句中的判断条件，现在只有在按下‘a’键时才会调用透明效果函数。

以上回复来自 FishC AI 小助理，如未能正确解答您的问题，请继续追问。

跳转到最佳答案楼层

FishC

问题出在两个循环中的范围设置有误，应该从1到n+1。此外，应该将screen.blit(bg, bgp)和screen.blit(bmf, p)放在循环外面，否则会导致重复绘制背景和角色。修改后的代码如下：

1. import pygame
2. import sys
3. from pygame.locals import *
5. pygame.init()
6. er = True
7. w = True
8. running = True
9. size = width, height = 600, 400
10. screen = pygame.display.set_mode(size)
11. bmf = pygame.image.load('Chomper.gif').convert_alpha()
12. p = (300, 200)
13. bg = pygame.image.load('170731094492.jpg')
14. bgp = (0, 0)
16. def blit_alpha(t, t1, s, l, o):
17.     x = l
18.     y = l
19.     temp = pygame.Surface((s.get_width(), s.get_height())).convert()
20.     temp.blit(t1, (-x, -y))
21.     temp.blit(s, (0, 0))
22.     temp.set_alpha(o)
23.     t.blit(temp, l)
25. def rGraduallyTransparent(t, t1, s, l, n):
26.     z = n + 1
27.     for i in range(1, z):
28.         blit_alpha(t, t1, s, l, i)
29.         pygame.display.flip()
30.         pygame.time.delay(10)
32. def GraduallyTransparent(t, t1, s, l, n):
33.     z = n + 1
34.     for i in range(z, 1, -1):
35.         blit_alpha(t, t1, s, l, i)
36.         pygame.display.flip()
37.         pygame.time.delay(10)
39. while True:
40.     for event in pygame.event.get():
41.         if event.type == pygame.QUIT:
42.             sys.exit()
44.     screen.blit(bg, bgp)
45.     k = pygame.key.get_pressed()
46.     if k[K_a]:
47.         rGraduallyTransparent(screen, bg, bmf, p, 100)
48.         GraduallyTransparent(screen, bg, bmf, p, 100)
50.     screen.blit(bmf, p)
51.     pygame.display.flip()

复制代码

请注意，我也修复了if语句中的判断条件，现在只有在按下‘a’键时才会调用透明效果函数。

以上回复来自 FishC AI 小助理，如未能正确解答您的问题，请继续追问。