I'm implementing the terrain in my engine and I've been suggested to look in this "geoclipmap" technique, but I couldn't find about it's concept on google and I could only find implementations with C# and XNA. The only other implementation I found was from 2006 and they used lists and deprecated OpenGL commands, so I'm looking for something more updated.
Could anyone explain what's the concept behind it (what am I supposed to do in C++ / OpenGL) or point me where can I find them?