玩家移动的python类问题

时间:2020-06-27 18:03:31

标签: python class pygame python-class

我正在学习python 我创建了用于玩家移动的代码,当它不在课堂上时可以使用,但是我在课堂上需要它。 当我按W或S时,播放器仅按vel = 5移动一次,然后返回到其原始坐标。如何解决?

right = False
left = False

class player:    
    def __init__(self, x, y, vel = 5, walkCount = 0):
        self.x = x
        self.y = y
        self.vel = vel
        self.walkCount = walkCount
    
    def update(self):
        if self.walkCount + 1 >= 40:
            self.walkCount = 0
        if right:
            screen.blit(charRun[walkCount//5],(self.x, self.y))
            self.walkCount += 1        
        elif left:
            screen.blit(charBack[walkCount//5],(self.x, self.y))
            self.walkCount += 1
        else:
            screen.blit(char,(self.x, self.y))
            pygame.display.update()

    def move(self):
        keys = pygame.key.get_pressed()
        if keys[pygame.K_w]:
            self.x += self.vel
            right = True
            left = False
        elif keys[pygame.K_s]:
            self.x -= self.vel
            left = True
            right = False
        else:
            right = False
            left = False
            self.walkCount = 0

def redrawGameWindow():
    screen.blit(bg, (0, 0))
    screen.blit(car, (800,500))

run = True
while run:
    clock.tick(60)    
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            run = False

    redrawGameWindow()
    b = player(500,500)
    b.move()
    b.update()

2 个答案:

答案 0 :(得分:0)

按照@jasonharper的建议,您只需在开始时创建一次播放器,然后在类中创建左右变量即可。

class player:    
    def __init__(self, x, y, vel = 5, walkCount = 0):
        self.x = x
        self.y = y
        self.vel = vel
        self.walkCount = walkCount
        self.right = False
        self.left = False
    
    def update(self):
        if self.walkCount + 1 >= 40:
            self.walkCount = 0
        if right:
            screen.blit(charRun[walkCount//5],(self.x, self.y))
            self.walkCount += 1        
        elif left:
            screen.blit(charBack[walkCount//5],(self.x, self.y))
            self.walkCount += 1
        else:
            screen.blit(char,(self.x, self.y))
            pygame.display.update()

    def move(self):
        keys = pygame.key.get_pressed()
        if keys[pygame.K_w]:
            self.x += self.vel
            self.right = True
            self.left = False
        elif keys[pygame.K_s]:
            self.x -= self.vel
            self.left = True
            self.right = False
        else:
            self.right = False
            self.left = False
            self.walkCount = 0

def redrawGameWindow():
    screen.blit(bg, (0, 0))
    screen.blit(car, (800,500))

run = True
b = player(500,500)
while run:
    clock.tick(60)    
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            run = False

    redrawGameWindow()
    b.move()
    b.update()

答案 1 :(得分:0)

首先,要检查出什么问题,应该发布大多数代码,以便我们可以尝试对其进行测试和调试。 其次,编程中的类确实很有用,但是您不应做任何对代码没有意义的事情。类在那里可以帮助您创建许多对象,但也可以维护代码的稳定性。

因此,您的所有代码都应该有意义。例如,在您的代码中,您让播放器更新了显示内容。 display.update方法在您的while循环中会更好,因为无论何时更新屏幕,播放器都不应控制。想象一下,以后您添加内容,但是您的代码不起作用,因为显示内容没有更新...

无论如何,让我们回到代码。您可以在此处看到您在while循环中创建对象。因此,每次执行循环时,您都会使用默认值创建一个新对象:

b = player(500,500)

因此,此函数每执行一次周期:

def __init__(self, x, y, vel = 5, walkCount = 0):
    self.x = x
    self.y = y
    self.vel = vel
    self.walkCount = walkCount

所以x和y保持在500。

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