Powerbar pygame脚本，pygame
Powerbar pygame脚本，pygame
提问于 2018-04-06 15:34:33
我在试着创造一个“powerbar”在下面的代码中，我可以按left & right键来增加条，当bar_start_width >400px时，prg终止。当bar_start_width >0时，我希望"powerbar“减小。因此，如果您停下来按下按钮，条形图将慢慢减小，直到bar_start_width > 0。在我的代码中，它正在缓慢地减少bar_start_width，但不会更新显示。while循环也会继续运行。
这是完整的代码:导入时间导入随机导入pygame
import time
import pygame
pygame.init()
display_width = 800
display_height = 600
black = (0, 0, 0)
white = (255, 255, 255)
gameDisplay = pygame.display.set_mode((display_width, display_height))
clock = pygame.time.Clock()
def powerbar(thingx, thingy, thingw, thingh, color):
pygame.draw.rect(gameDisplay, color, [thingx, thingy, thingw, thingh])
def game_quit():
pygame.quit()
quit()
def game_loop():
decrease_speed = -1
bar_start_width = 0
bar_x = 100
bar_y = 100
bar_height = 50
bar_color = black
x_change = 0
while True:
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
quit()
gameDisplay.fill(white) # the background color before img
# Should change so you can ONLY press right after left (or opposite)
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_LEFT:
x_change = 5
if event.key == pygame.K_RIGHT:
x_change = 5
if event.type == pygame.KEYUP:
if event.key == pygame.K_LEFT or event.key == pygame.K_RIGHT:
x_change = 0
bar_start_width += x_change
# Draw powerbar
powerbar(bar_x, bar_y, bar_start_width, bar_height, bar_color)
if bar_start_width > 10:
while True:
bar_start_width += decrease_speed
time.sleep(0.5)
print(bar_start_width) #See output in terminal
if bar_start_width == 0:
break
if bar_start_width > 400:
game_quit()
pygame.display.update()
clock.tick(60)
game_loop()
pygame.quit()
quit()我也尝试过用for循环来解决我的问题，但在长时间尝试不同的东西之后，这是我能想到的最好的方法。是否有人可以帮助我，或将我链接到类似的讨论中？谢谢!
回答 1
Stack Overflow用户
发布于 2018-04-11 21:46:04
我不明白为什么要在主while循环中嵌套while循环。如果我理解正确的话，如果宽度大于0 (而不是当宽度大于0时)，您希望减少每一帧的宽度。只需删除while循环和time.sleep调用并减小宽度if bar_start_width > 0:即可。
import pygame
pygame.init()
black = (0, 0, 0)
white = (255, 255, 255)
gameDisplay = pygame.display.set_mode((800, 600))
clock = pygame.time.Clock()
def game_loop():
decrease_speed = -1
bar_start_width = 0
bar_x = 100
bar_y = 100
bar_height = 50
x_change = 0
while True:
for event in pygame.event.get():
if event.type == pygame.QUIT:
return
elif event.type == pygame.KEYDOWN:
if event.key == pygame.K_LEFT:
x_change = 5
elif event.key == pygame.K_RIGHT:
x_change = 5
elif event.type == pygame.KEYUP:
if event.key == pygame.K_LEFT or event.key == pygame.K_RIGHT:
x_change = 0
bar_start_width += x_change
if bar_start_width > 0:
bar_start_width += decrease_speed
if bar_start_width <= 0: # Set it to the minimum width of 1.
bar_start_width = 1
if bar_start_width > 400:
print('> 400')
gameDisplay.fill(white)
# Draw powerbar
pygame.draw.rect(gameDisplay, black, (bar_x, bar_y, bar_start_width, bar_height))
pygame.display.update()
clock.tick(60)
game_loop()
pygame.quit()我重新安排了一些东西，因为游戏逻辑和事件循环混合在一起。你通常应该尝试分离事件处理，游戏逻辑和渲染。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/49687690
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