See the source code in
Online DRC viewer app is an easy-to-use online application that allows you to view your DRC document online just using a browser. You do not need to install specialized software to open a DRC document, just open this application using a web browser, and drag your document into the upload area, and click the view button, your document will open in the browser regardless of whether you are using Windows, Linux, MacOS, Android or even a mobile device. DRC viewer application shows your content in an interactive user interface, you can view it from different perspective.
If you want to implement this feature programmatically, please check Aspose.3D documentation.
Google Draco file and associated file format.