Python/Pygame - 跳转键并不总是注册

Question

我在 pygame 中跳跃时遇到问题。基本上，当我快速点击跳跃键时，我的 Sprite 有时会拒绝跳跃。这是一款平台游戏，因此快速点击跳跃是游戏机制的关键。我不认为这是事件队列的问题，因为即使 Sprite 不跳跃，跳跃声音仍然会播放。

完整代码:http://pastebin.com/D1B5yuEx

主循环:

        while 1:

            timer.tick(30)

            for e in pygame.event.get():
                    if e.type == KEYDOWN:
                            if e.key == K_ESCAPE:
                                    pygame.quit()
                                    sys.exit()

                    if e.type == KEYDOWN and e.key == K_w:
                            jump.play()
                            up = True
                    if e.type == KEYDOWN and e.key == K_s:
                            down = True
                    if e.type == KEYDOWN and e.key == K_a:
                            left = True
                            last_key_pressed = "LEFT"
                    if e.type == KEYDOWN and e.key == K_d:
                            right = True
                            last_key_pressed = "RIGHT"
                    if e.type == KEYDOWN and e.key == K_e:
                            select = True
                    if e.type == KEYDOWN and e.key == K_SPACE:
                            if inventory.count("PISTOL") == 1:

                                    bullet = Bullet()
                                    shoot_fx.play()
                                    bullet.rect.x = player.rect.x +20
                                    bullet.rect.y = player.rect.y +20
                                    bullets.add(bullet)
                                    if bullet.rect.x == player.rect.x +100:
                                            print "hi"

                                    if right or last_key_pressed =="RIGHT":
                                            bullet.xvel = 7
                                    if left or last_key_pressed =="LEFT":
                                            bullet.xvel = -7    

                    if pygame.joystick.get_count() != 0:
                            if inventory.count("PISTOL") == 1:
                                    if my_joystick.get_button(2) == 1:

                                            bullet = Bullet()
                                            shoot_fx.play()
                                            bullet.rect.x = player.rect.x +20
                                            bullet.rect.y = player.rect.y +20
                                            bullets.add(bullet)

                                            if right or last_key_pressed =="RIGHT":
                                                    bullet.xvel = 7
                                            if left or last_key_pressed =="LEFT":
                                                    bullet.xvel = -7


                    if e.type == KEYUP and e.key == K_w:
                            up = False
                    if e.type == KEYUP and e.key == K_s:
                            down = False
                    if e.type == KEYUP and e.key == K_a:
                            left = False
                    if e.type == KEYUP and e.key == K_d:
                            right = False



            if pygame.joystick.get_count() != 0:

                    if my_joystick.get_axis(0) == -1:
                            last_key_pressed = "LEFT"#left
                            left = True
                    else:
                            left = False

                    if my_joystick.get_axis(0) > .9:
                            last_key_pressed = "RIGHT"
                            right = True
                    else:
                            right = False

                    if my_joystick.get_button(1) == True:

                            up = True
                    else:
                            up = False

                    if my_joystick.get_button(3) == True:
                            select = True
                    else:
                            select = False








            for y in range(20):
                    for x in range(40):
                            screen.blit(bg, (x * 64, y * 64))
            bullets.update(left,right)

            camera.update(player)


            player.update(shoot,up, down, left, right, select,pickups,platforms,inventory,player,bullets)
            for e in entities:
                    screen.blit(e.image,camera.apply(e))
            for b in bullets:
                    screen.blit(b.image,camera.apply(b))

            pygame.display.update()

玩家等级:

class Player(Entity):

    walking_frames_l = []
    walking_frames_r = []

    jumping_r = []
    jumping_l = []

    run_frames_r = []
    run_frames_l = []


    def __init__(self, x, y):
            image = pygame.image.load("C:\Users\Tom\Data\Art\Player1.png")
            self.walking_frames_r.append(image)
            image = pygame.image.load("C:\Users\Tom\Data\Art\Player11.png")
            self.walking_frames_r.append(image)
            image = pygame.image.load("C:\Users\Tom\Data\Art\Player11.png")
            self.walking_frames_r.append(image)
            image = pygame.image.load("C:\Users\Tom\Data\Art\Player2.png")
            self.walking_frames_r.append(image)
            image = pygame.image.load("C:\Users\Tom\Data\Art\Player22.png")
            self.walking_frames_r.append(image)
            image = pygame.image.load("C:\Users\Tom\Data\Art\Player3.png")
            self.walking_frames_r.append(image)
            image = pygame.image.load("C:\Users\Tom\Data\Art\Player33.png")
            self.walking_frames_r.append(image)
            image = pygame.image.load("C:\Users\Tom\Data\Art\Player4.png")
            self.walking_frames_r.append(image)
            image = pygame.image.load("C:\Users\Tom\Data\Art\Player44.png")
            self.walking_frames_r.append(image)

            image = pygame.image.load("C:\Users\Tom\Data\Art\Player1.png")
            image = pygame.transform.flip(image,True,False)
            self.walking_frames_l.append(image)
            image = pygame.image.load("C:\Users\Tom\Data\Art\Player11.png")
            image = pygame.transform.flip(image,True,False)
            self.walking_frames_l.append(image)
            image = pygame.image.load("C:\Users\Tom\Data\Art\Player11.png")
            image = pygame.transform.flip(image,True,False)
            self.walking_frames_l.append(image)
            image = pygame.image.load("C:\Users\Tom\Data\Art\Player2.png")
            image = pygame.transform.flip(image,True,False)
            self.walking_frames_l.append(image)
            image = pygame.image.load("C:\Users\Tom\Data\Art\player22.png")
            image = pygame.transform.flip(image,True,False)
            self.walking_frames_l.append(image)
            image = pygame.image.load("C:\Users\Tom\Data\Art\player3.png")
            image = pygame.transform.flip(image,True,False)
            self.walking_frames_l.append(image)
            image = pygame.image.load("C:\Users\Tom\Data\Art\player33.png")
            image = pygame.transform.flip(image,True,False)
            self.walking_frames_l.append(image)
            image = pygame.image.load("C:\Users\Tom\Data\Art\player4.png")
            image = pygame.transform.flip(image,True,False)
            self.walking_frames_l.append(image)
            image = pygame.image.load("C:\Users\Tom\Data\Art\player44.png")
            image = pygame.transform.flip(image,True,False)
            self.walking_frames_l.append(image)

            self.frame_r = 0
            self.frame_l = 0

            self.last_key_pressed = None

            Entity.__init__(self)
            self.xvel = 0
            self.yvel = 0
            self.onGround = False
            self.image = self.walking_frames_r[self.frame_r]
            self.rect = Rect(x,y,23,31)



    def update(self,shoot,up, down, left, right,select, pickups, platforms, inventory, player,bullets):

            if shoot:
                    pass


            if up:
                    if self.onGround: self.yvel -= 7
            if down:
                    pass
            if left:

                    self.last_key_pressed = "LEFT"
                    self.xvel = -4
                    self.frame_l += 1
                    self.image = self.walking_frames_l[self.frame_l]
                    if self.frame_l == 8: self.frame_l = 0
            if right:

                    self.last_key_pressed = "RIGHT"
                    self.xvel = 4
                    self.frame_r += 1
                    self.image = self.walking_frames_r[self.frame_r]
                    if self.frame_r == 8: self.frame_r = 0

            if not (left or right):
                    if self.last_key_pressed == "LEFT":
                            self.facing = 1
                            self.image = self.walking_frames_l[1]

                    if self.last_key_pressed == "RIGHT":
                            self.facing = 0
                            self.image = self.walking_frames_r[1]


            if not self.onGround:

                    self.yvel += 0.3

                    if self.yvel > 30: self.yvel = 30
            if not(left or right):
                    self.xvel = 0

            self.rect.left += self.xvel

            self.collide(self.xvel, 0,pickups, platforms,select,inventory)

            self.rect.top += self.yvel

            self.onGround = False;

            self.collide(0, self.yvel, pickups, platforms,select,inventory)

    def collide(self, xvel, yvel,pickups, platforms,select,inventory):
            for p in platforms:
                    if sprite.collide_rect(self, p):
                            if isinstance(p, ExitBlock):
                                    pygame.quit
                            if xvel > 0: self.rect.right = p.rect.left
                            if xvel < 0: self.rect.left = p.rect.right
                            if yvel > 0:
                                    self.rect.bottom = p.rect.top
                                    self.onGround = True
                                    self.yvel = 0
                            if yvel < 0: self.rect.top = p.rect.bottom
                            if yvel < 0: self.yvel = 3
            for p in pickups:
                    if sprite.collide_rect(self,p) and select == True:
                            if inventory.count("PISTOL") < 1:
                                    inventory.append(ITEMS.item.items[0])

Answer 1

在事件处理程序中，您正在处理队列中的所有事件。如果 keydown 和 keyup 事件足够接近，它们将被一个接一个地处理，并且全局 up 变量将不会被其余事件视为 True你的程序的。您需要捕获 up 变量的上升沿，并确保在调用玩家的 update 方法之前它不会被设置回 False .

发布时是否需要将up设置为False？如果是这样，您可能需要另一个 jump 变量，该变量可以在处理跳转时设置为 False。

我注意到您的操纵杆跳跃按钮处理不会播放声音。您可能需要考虑使用函数来处理按钮按下，而不是直接修改全局状态。它也可以让您只拥有一次 PISTOL 处理代码。