滑動精靈

Question

我想讓我的精靈像滑冰一樣滑動。所以如果他在地面上，那麼他可以正常行走，但是當他接觸冰塊時，他會滑動，直到阻止他。 有誰知道如何做到這一點？ 由於

Answer 1

操縱像「Sprite Movement Towards a Target」示例的摩擦係數（以下修改）：

class Sprite(pygame.sprite.Sprite): 
    ICE = 0.01 
    LAND = 1. 

    def __init__(self): 
     # ... 
     self.normal_friction = .95 # friction while accelerating 
     self.slowing_friction = .8 # friction while slowing down 

    def update(self): 
     # ... 
     if self.dir: # if there is a direction to move 

      if self.in_ice_region(): 
       surface_coefficient = Sprite.ICE 
      else: 
       surface_coefficient = Sprite.LAND 

      if self.distance_check(self.dist): # if we need to slow down 
       self.speedX += (self.dir[0] * (self.speed/2)) # reduced speed 
       self.speedY += (self.dir[1] * (self.speed/2)) 
       self.speedX *= surface_coefficient * self.slowing_friction # increased friction 
       self.speedY *= surface_coefficient * self.slowing_friction 

      else: # if we need to go normal speed 
       self.speedX += (self.dir[0] * self.speed) # calculate speed from direction to move and speed constant 
       self.speedY += (self.dir[1] * self.speed) 
       self.speedX *= surface_coefficient * self.normal_friction # apply friction 
       self.speedY *= surface_coefficient * self.normal_friction 

      self.trueX += self.speedX # store true x decimal values 
      self.trueY += self.speedY 
      self.rect.center = (round(self.trueX),round(self.trueY)) # apply values to sprite.center