Python动画时序 [英] Python Animation Timing

问题描述

我目前正在使用python中的Sprite Sheet工具，该工具可将组织导出到xml文档中，但在尝试制作预览动画时遇到了一些问题。我不太确定如何使用python设置帧频。例如，假设我拥有所有适当的帧数据和绘图功能，我该如何编码以每秒30帧（或任何其他任意速率）显示的时间。

I'm currently working on sprite sheet tool in python that exports the organization into an xml document but I've run into some problems trying to animate a preview. I'm not quite sure how to time the frame rate with python. For example, assuming I have all of my appropriate frame data and drawing functions, how would I go about coding the timing to display it at 30 frames per second (or any other arbitrary rate).

推荐答案

最简单的方法是使用 Pygame ：

The easiest way to do it is with Pygame:

import pygame
pygame.init()

clock = pygame.time.Clock()
# or whatever loop you're using for the animation
while True:
    # draw animation
    # pause so that the animation runs at 30 fps
    clock.tick(30)

第二种最简单的方法是手动进行：

The second easiest way to do it is manually:

import time

FPS = 30
last_time = time.time()
# whatever the loop is...
while True:
    # draw animation
    # pause so that the animation runs at 30 fps
    new_time = time.time()
    # see how many milliseconds we have to sleep for
    # then divide by 1000.0 since time.sleep() uses seconds
    sleep_time = ((1000.0 / FPS) - (new_time - last_time)) / 1000.0
    if sleep_time > 0:
        time.sleep(sleep_time)
    last_time = new_time

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