OpenGL® SuperBible, Third Edition

Chapter 17. Occlusion Queries: Why Do More Work Than You Need To?

by Benjamin Lipchak

WHAT YOU'LL LEARN IN THIS CHAPTER:

How To	Functions You'll Use
Create and delete query objects	glGenQueries/glDeleteQueries
Define bounding box occlusion queries	glBeginQuery/glEndQuery
Retrieve the results from an occlusion query	glGetQueryObjectiv

Complex scenes contain hundreds of objects and thousands upon thousands of polygons. Consider the room you're in now, reading this book. Look at all the furniture, objects, other people or pets and think of the rendering power needed to accurately represent their complexity. Several readers will find themselves happily sitting on a crate near a computer in an empty studio apartment, but the rest will envision a significant ...