Chapter 12. Interactive Graphics
WHAT YOU’LL LEARN IN THIS CHAPTER:
Thus far, you have learned to create some sophisticated 3D graphics using OpenGL, and many applications do no more than generate these scenes. But many graphics applications (notably, games, CAD, 3D modeling, and so on) require more interaction with the scene itself. In addition to menus and dialog boxes, often you need to provide a way for the user to interact with a graphical scene. Typically, this interaction usually happens with a mouse.
Selection, a powerful feature of OpenGL, allows you to take a mouse click at some position over a window and determine ...
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