太酷了！90行Python代码,让微信地球转起来!

知行编程网 2022-05-09 09:00 知行编程网 | 隐藏边栏 | 抢沙发 | 3 0

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1.微信地球

手机重启后打开微信的一瞬间，会看到一幅有名的图片，上面站着一个张小龙。

你可曾想过这样一个问题，如果上面那个地球转起来会是怎样？

2.效果图

效果简直不要太酷炫，我只能直呼太牛逼！那么这样一个酷炫的操作是怎么做出来的呢？我们接着往下看。

3.素材准备

这里共需要准备三个素材：1.地球表面素材；2.云图素材；3.微信地球的抠图素材。

1）地球表面素材

2）云图素材

3）微信地球的抠图素材

4.基本原理

基本的贴图方法在本博前面的文章《用python实现旋转地球》中讲过了，具体可以参考下面的链接，这里重点讲双层素材的动态效果。云图是灰度图，白色地方代表云层厚，黑色的地方代表那里云层薄，我们根据颜色设置不同的透明度。

https://blog.csdn.net/xiaorang/article/details/106692489

如果云图与地面的选择速度相同，会显得不自然，我们这里让云层旋转速度比地面旋转速度慢一半，产生相对运动的效果。

这样带来的问题是，地球旋转360°后云图只旋转了180°，必须加倍到720°才能实现连续运动。

具体的云层透明度设置，参数需根据实际效果进行调整。

5.GIF压缩

顺便给大家介绍一个比较好用的压缩GIF的在线工具，链接如下。

https://www.iloveimg.com/zh-cn/compress-image/compress-gif

直接生成的GIF动图有超过传输限制，无法上传，用此工具压缩后文件体积大幅缩小，但图片效果没有肉眼可以察觉的影响。

6.完整代码

分步骤的具体逻辑讲解，请看《用python实现旋转地球》这个文章，链接我们在上面已经展示，这里贴一下完整代码。

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36)" data-darkmode-original-bgcolor-15882384789136="rgb(255, 255, 255)" data-style="letter-spacing: 0.544px; background-color: rgb(255, 255, 255); text-align: center; color: rgba(230, 230, 230, 0.9); font-size: 16px; line-height: 25.6px; overflow-wrap: break-word !important;" data-darkmode-bgcolor-15882396318564="rgb(36, 36, 36)" data-darkmode-original-bgcolor-15882396318564="rgb(255, 255, 255)" data-darkmode-color-15882396318564="rgba(230, 230, 230, 0.9)" data-darkmode-original-color-15882396318564="rgba(230, 230, 230, 0.9)" data-darkmode-bgcolor-15900529136199="rgb(36, 36, 36)" data-darkmode-original-bgcolor-15900529136199="rgb(255, 255, 255)" data-darkmode-color-15900529136199="rgba(230, 230, 230, 0.9)" data-darkmode-original-color-15900529136199="rgba(230, 230, 230, 0.9)" class="js_darkmode__5" style="letter-spacing: 0.544px;text-align: center;color: rgba(230, 230, 230, 0.9);line-height: 25.6px;"><section class="js_darkmode__7"><section data-darkmode-bgcolor-15860613985508="rgb(36, 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data-darkmode-original-color-15900529136199="rgb(51, 51, 51)" data-darkmode-bgimage-15900529136199="1" style="font-family: 楷体, 楷体_GB2312, SimKai;">点的“在看”，否则就看不到我了555</span></section></section></section></section></section></section></section>

1.微信地球

2.效果图