我正在pygame库做一个简单的游戏。我注意到一个奇怪的错误,如果我点击其中一个方向键来移动我的角色,它会将它向一个方向移动。按下键会在您按下的方向上触发正向加速,然后向上键将加速度重置为零。检查这些值后,尽管按键发生,但加速度仍保持为正值。查看所有的事件,它注册一个键和键,但pygame不运行与该键关联事件关联的代码。这可能是我键盘的一个信号问题,但它似乎可能是pygame中的事件处理。这里是我的代码:pygame失败检测键盘
import pygame
pygame.init()
display_x = 1024
display_y = 512
game_display = pygame.display.set_mode((display_x, display_y))
clock = pygame.time.Clock()
fps = 30
font = pygame.font.SysFont(None, 25)
max_velocity = 16
acceleration = 4
def print_to_screen(text, color, x, y):
screen_text = font.render(text, True, color)
game_display.blit(screen_text, [x, y])
def game_loop():
game_exit = False
lead_x = display_x/2
lead_y = display_y/2
vel_x = 0
vel_y = 0
acc_x = 0
acc_y = 0
tile_size = 32
while not game_exit:
for event in pygame.event.get():
print(event)
if event.type == pygame.QUIT:
game_exit = True
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_LEFT:
acc_x = -acceleration
if event.key == pygame.K_RIGHT:
acc_x = acceleration
if event.key == pygame.K_UP:
acc_y = -acceleration
if event.key == pygame.K_DOWN:
acc_y = acceleration
if event.type == pygame.KEYUP:
if event.key == pygame.K_LEFT and vel_x < 0:
acc_x = 0
if event.key == pygame.K_RIGHT and vel_x > 0:
acc_x = 0
if event.key == pygame.K_UP and vel_y < 0:
acc_y = 0
if event.key == pygame.K_DOWN and vel_y > 0:
acc_y = 0
if -max_velocity < vel_x < max_velocity: # if velocity isn't max, adds acceleration to velocity
vel_x += acc_x
if -max_velocity < vel_y < max_velocity:
vel_y += acc_y
if vel_x < 0: # velocity decay, if vel is less than 0, adds one. no input = slowed down cube
vel_x += 1
elif vel_x > 0:
vel_x -= 1
if vel_y < 0:
vel_y += 1
elif vel_y > 0:
vel_y -= 1
if (lead_x + vel_x) < 0: # looks into future: if past border in next frame, sets x coord to 0, stops motion
vel_x = 0
acc_x = 0
lead_x = 0
elif (lead_x + vel_x) > (display_x - tile_size):
vel_x = 0
acc_x = 0
lead_x = (display_x - tile_size)
if (lead_y + vel_y) < 0:
vel_y = 0
acc_y = 0
lead_y = 0
elif (lead_y + vel_y) > (display_y - tile_size):
vel_y = 0
acc_y = 0
lead_y = (display_y - tile_size)
lead_x += vel_x
lead_y += vel_y
game_display.fill((255, 255, 255))
pygame.draw.rect(game_display, (255, 0, 0), [lead_x, lead_y, tile_size, tile_size])
print_to_screen(str(int(lead_x)) + ", " + str(int(lead_y)), (0, 0, 0), 0, 0)
if vel_x > max_velocity or vel_y > max_velocity:
print_to_screen(str(int(vel_x)) + ", " + str(int(vel_y)), (255, 0, 0), 0, 16)
else:
print_to_screen(str(int(vel_x)) + ", " + str(int(vel_y)), (0, 0, 0), 0, 16)
if acc_x > acceleration or acc_y > acceleration:
print_to_screen(str(int(acc_x)) + ", " + str(int(acc_y)), (255, 0, 0), 0, 32)
else:
print_to_screen(str(int(acc_x)) + ", " + str(int(acc_y)), (0, 0, 0), 0, 32)
pygame.display.update()
clock.tick(fps)
game_loop()
pygame.quit()
quit()
下面是从快速点击的事件数据:
<Event(2-KeyDown {'unicode': '', 'key': 276, 'mod': 0, 'scancode': 75})>
<Event(3-KeyUp {'key': 276, 'mod': 0, 'scancode': 75})>
它显示了一个关键的向上和向下的关键事件,不知道为什么关键行动将无法注册。
谢谢!不知道为什么我列入,但解决了这个问题。 –
嘿,我可以告诉你为什么你添加了这个条件。 :P如果你快速按下'vel_x> 0'(或者在你的情况下为'acc_x')左右按压,则可能发生播放器完全停止,你必须释放键并再次按下才能再次移动精灵。我认为在重设“vel”之前检查球员是否正朝着特定方向移动通常是一个好主意。 – skrx
是的,这可能是为什么。似乎现在工作,从那时起我改变了一些其他的代码。测试一下你说的话,如果我真的快点击左右快速的加速度会再次卡住,就像你快速点击一个方向一样。奇怪你的修复没有解决这个问题。 –