我想使用openStreetMap数据在openGL中渲染道路，我应该从哪里开始？(I want to use openStreetMap data to render roads in openGL, where should I start?)

 我的想法是，用户将选择他/她想要生成道路的世界部分并检索openStreetMap数据并使用它来在openGL中渲染道路。 
 
 在网上搜索和试验时，我想到了这种方法： 
 
 
 
 获取所选地图的xml文件 
 
 
 解析xml并通过openGL生成道路。 
 
 
 但我认为这是非常天真的做法。 
 
 另外为了实验，我使用OSM2WorldViewer将xml文件转换为obj文件并将其作为模型导入到openGL中，但这种方法很麻烦并且需要时间 
 
 
 我不熟悉OpenStreetMap api以及它如何在这样的项目中使用。 任何建议，或有用的链接如何启动这个项目？ 

What I have in mind is that user will select the part of world he/she wants to generate roads and retrieve openStreetMap data and use it to render roads in openGL.
 
On searching the web and experimenting, I thought of this approach: 
 
 
 
get xml file of selected map
 
 
parse the xml and generate roads by openGL.
 
 
But I think this is very naive approach.
 
Also to experiment a bit I used OSM2WorldViewer to convert the xml file to obj file and imported that as a model in openGL, but this method is cumbersome and takes time 
 
 
and I am unfamiliar with OpenStreetMap api and how it can be used in such a project. Any suggestions, or helpful links how to start this project ?

原文：https://stackoverflow.com/questions/13927142