Pygame delta时间颠簸开始

Question

我在pygame中试验delta时间，但是当我开始我的游戏时，delta时间总是在前两个游戏循环中颠簸。这里是我当前的代码：

import sys 

import pygame 

class Player(pygame.sprite.Sprite): 
    def __init__(self): 
     pygame.sprite.Sprite.__init__(self) 

     self.image = pygame.Surface([32, 32]) 
     self.image.fill((255, 128, 0)) 

     self.rect = self.image.get_rect() 
     self.rect.x = 20 
     self.rect.y = 20 

    def update(self, dt): 
     self.rect.x += dt/10 

    def draw(self, screen): 
     screen.blit(self.image, [self.rect.x, self.rect.y]) 

class GameState(): 
    def __init__(self): 
     self.player = Player() 

    def update(self, dt): 
     self.player.update(dt) 

    def draw(self, screen): 
     self.player.draw(screen) 

class Control(): 
    def __init__(self): 
     self.state = GameState() 

def main(): 
    pygame.init() 

    fps = 60 
    fpsClock = pygame.time.Clock() 

    width, height = 640, 480 
    screen = pygame.display.set_mode((width, height)) 

    control = Control() 

    dt = fps 

    while True: 
     screen.fill((0, 0, 0)) 

     for event in pygame.event.get(): 
      if event.type == pygame.QUIT: 
       pygame.quit() 
       sys.exit() 

     control.state.update(dt) 

     control.state.draw(screen) 

     pygame.display.flip() 
     dt = fpsClock.tick(fps) 

if __name__ == '__main__': 
    main() 

，这让我这个输出：

0.016666666666666666   
515       
16        
16        
17        
17        
16        
16        
17        
16        
16        
16        
17        
17        
16        
17        

我试图改变DT的初始值，但什么都不做。我认为这与我的游戏初始化时间过长有关。如果是这样，我该如何解决这个问题？

Answer 1

尝试将时钟的创建移动到第一个循环开始之前。否则，您看到的第一个抖动就是您的初始化代码的度量。

pygame.init() 

fps = 60 

width, height = 640, 480 
screen = pygame.display.set_mode((width, height)) 

control = Control() 

dt = fps 
# start recording clock from here 
fpsClock = pygame.time.Clock() 
while True: 
    screen.fill((0, 0, 0)) 

    for event in pygame.event.get(): 
     if event.type == pygame.QUIT: 
      pygame.quit() 
      sys.exit() 

    control.state.update(dt) 

    control.state.draw(screen) 

    pygame.display.flip() 
    dt = fpsClock.tick(fps)