python - 为什么我的 Sprite 不经常出现，而不是静止不动时通过图像动画

Question

所以当我创建一个游戏时，我的 Sprite 是一只 bat 。到目前为止，当用户按住左键或右键时，动画效果很好；但是，我尝试添加用户站立不动的位置，“飞行”动画仍在播放，面向玩家最后面对的方向，因此看起来 bat 并不是只是静止不动。

我得到的结果是 Sprite 不会出现在屏幕上，除非我按住其中一个移动键，当我只想让它持续动画时，即使用户没有移动。

我可以通过在静止时显示单个图像来使 Sprite 面向某个方向，但不能正确设置动画。

我听说过库 pyganim，但由于我所处的环境我无法使用它，所以我正在为选择而苦苦挣扎。

下面是 draw 函数的相关代码:

     def draw(self,window): 
#we must keep track of direction, are they moving and how many steps for frames
        if self.walkcount +1 >= 15: #15 as we have 5 sprites, which will be displayed 3 times per second
            self.walkcount = 0

        if not(self.standing): #if hes not standing still or moving, we'll walk through our animation 
            if self.left:
                window.blit(walkleft[self.walkcount//3],(self.x,self.y))#excludes remainders
                self.walkcount+=1
            elif self.right:
                window.blit(walkright[self.walkcount//3],(self.x,self.y)) 
                self.walkcount+=1
            elif self.isjump:
                window.blit(jumpp,(self.x,self.y))
                self.walkcount+=1
        else: #if he is, we'll blit him looking right or left
            if self.right:
                if self.walkcount +1 >= 15:#
                    self.walkcount = 0#
                    while True:#
                        #anim1.blit(window,(self.x,self.y)) #previous attempt
                        #window.blit(walkright[0],(self.x,self.y)) #displays first image of that direction when stood still
                        window.blit(walkright[self.walkcount//3],(self.x,self.y))
                        self.walkcount+=1
            else:
                if self.walkcount +1 >= 15: 
                    self.walkcount = 0#
                    while True:#
                        #anim2.blit(window,(self.x,self.y))
                        #window.blit(walkleft[0],(self.x,self.y))
                        window.blit(walkright[self.walkcount//3],(self.x,self.y)) 
                        self.walkcount+=1

这是为 right 或 left 为真的地方完成基本动画的地方，动画将在它为真时播放。

我一直在编辑的实际部分试图让它工作:

else: #if he is, we'll blit him looking right or left
            if self.right:
                if self.walkcount +1 >= 15:#
                    self.walkcount = 0#
                    while True:#
                        #anim1.blit(window,(self.x,self.y)) #previous attempt
                        #window.blit(walkright[0],(self.x,self.y)) #displays first image of that direction
                        window.blit(walkright[self.walkcount//3],(self.x,self.y))
                        self.walkcount+=1
            else:
                if self.walkcount +1 >= 15: 
                    self.walkcount = 0#
                    while True:#
                        #anim2.blit(window,(self.x,self.y))
                        #window.blit(walkleft[0],(self.x,self.y))
                        window.blit(walkright[self.walkcount//3],(self.x,self.y)) 
                        self.walkcount+=1

运动功能:

if keys[pygame.K_LEFT] and man.x > man.vel-man.vel: #if pressed we move our character by the velocity in whatever direction via grid which works from the TOP LEFT of screen
                                                    #vel-vel to equal 0, makes border better
        man.x -= man.vel
        man.left = True #were global variables
        man.right = False
        man.standing = False
    elif keys[pygame.K_RIGHT] and man.x < 500 - man.width: 
        man.x += man.vel                #screenwidth
        man.right = True
        man.left = False
        man.standing = False
    else:
        man.standing = True #now we'll know if he's looking left or right
        man.walkcount = 0

任何其他建议/反馈表示赞赏。

Answer 1

因为当站着不动时，你设置:

    man.standing = True #now we'll know if he's looking left or right
    man.walkcount = 0

所以 walkcount是 0和 standing是 True .

在 draw功能， not(self.standing)是 False ，所以我们跳转到 else堵塞。

还有一个 if/else ，并在每个分支上检查

if self.walkcount +1 >= 15:

永远不会是 True因为 walkcount是 0所以 window.blit永远不会到达任一分支中的行；因此图像不会被传送到窗口。

无需测试，我认为整个方法可以简化为

 def draw(self,window): 

    #we must keep track of direction, are they moving and how many steps for frames
    if self.walkcount +1 >= 15: #15 as we have 5 sprites, which will be displayed 3 times per second
        self.walkcount = 0

    if self.isjump:
        window.blit(jumpp,(self.x,self.y))
    else:
        if self.left:
            window.blit(walkleft[self.walkcount//3],(self.x,self.y))#excludes remainders
        else:
            window.blit(walkright[self.walkcount//3],(self.x,self.y)) 

    self.walkcount+=1

和线

    man.walkcount = 0

应该被删除。