RoR - 邮件中的动态主体（部分）(RoR - Dynamic body (part) in mailer)

 在pygame中，您需要使用您编写的代码。 
 
#clear to reload
screen.fill(0)

#drawing background
screen.blit(back, background )

#update
pygame.display.flip()
 
 如果您将一个播放器添加到屏幕然后移动他。 您会注意到，除非您重绘背景，否则您将不止一次看到该角色。 
 
 Pygame不只是让你在屏幕上添加图像并移动它，你必须重绘背景以摆脱前一帧。 
 
 您应该在代码中添加的另一件事是等待。 
 
clock = pygame.time.Clock()
FPS = 30

while 1:
    clock.tick(FPS)
 
 这将设置帧速率。 我会说你通常会想要30到60帧，具体取决于游戏/硬件。 
 
 你当前的程序可能会重新绘制几百帧，所以这肯定会增加滞后。 
 
 当我在没有背景的我的电脑Ubuntu 12.04上检查这个。 即黑屏。 
 
 我的帧速率在1000 - 2000 FPS之间。 

In pygame you need to use this code you wrote.
 
#clear to reload
screen.fill(0)

#drawing background
screen.blit(back, background )

#update
pygame.display.flip()
 
If you add a player to the screen and then move him. You will notice that unless you redraw the background, you will see the character more than once.
 
Pygame doesn't just let you add an image to the screen and move it around, you must redraw the background to get rid of a previous frame.
 
Another thing you should add to your code is a wait.
 
clock = pygame.time.Clock()
FPS = 30

while 1:
    clock.tick(FPS)
 
This will set the frame rate. I'd say you would generally want this at 30 - 60 frames, depending on the game / hardware.
 
Your current program is probably redrawing the frame a several hundred times, so this will definately add lag.
 
When I checked this on my pc Ubuntu 12.04 without a background. i.e. A Black screen.
 
My frame rate was between 1000 - 2000 FPS.