WebGL

I've been carefully trolling the internet for the past two days to understand depth testing for semi-transparent objects. I've read multiple papers/tutorials on the subject and in theory I believe I understand how it works. However none of them give me actual example code. I have three requirements for my depth testing of semi-transparent objects: It should be order independant. It should work if two quads of the same objects are intersection each other. Both semi-transparent. Imagine a grass object that looks like a X when viewed from above: It should correctly render a semi-transparent

目录 1. 服务器端的检测 2. 客户端的检测 ——参考博客 https://www.zhuyingda.com/blog/article.html?id=17 机器人协议 爬虫领域有一个“白道手段”——robots协议，这是一个君子协议，即用allow和disallow声明各个页面的爬取授权，但除了商业搜索引擎的爬虫程序，野生爬虫根本不会管你这个（明白了scrapy框架中的ROBOTSTXT_OBEY 默认为True） 1. 服务器端的检测 服务器端针对user-agent、referer、cookie等字段进行检查，但这种检查方式存在明显的缺点，这些字段都是可以轻易伪造的，甚至还能不断变换这些字段和ip代理，伪装成多个用户在访问，所以这种检查方式还是不太靠谱。 另一种检查方式是，服务器端可以检查浏览器http头指纹，根据声明的浏览器厂商和版本，来鉴别http header中的各字段是否符合该浏览器的特征。典型的就是PhantomJS 1.X版本采用的Qt框架，在http头里面有明显的Qt框架网络请求特征，可以被服务器直接识别拦截 还有一种变态的检测机制，服务器对所有的页面请求，在http response中种下一个cookie token，然后在这个页面内异步执行一些的ajax接口里面去校验来访请求是否含有cookie token，并将token传回表明这是一个合法的浏览器

Here is a 3D earth made based on Three js I want to find the location of Longitude and Latitude of the currently clicked location and show the coordinate lines What should be the strategy to define those diversion lines? How could I map my texture to it's correct equivalent Longitude/Latitude? Edit 1 : My question in a simpler form: How can I get the x, y of the pattern image which was clicked inside the sphere? 来源： https://stackoverflow.com/questions/10431632/showing-coordinate-lines-of-a-3d-earth