In the previous chapters, you learned about the anatomy of physics simulation in depth. Now, we will explore the most interesting part of the game, which is to add three-dimensional objects to your games. In this chapter, we will start exploring the basics of OpenGL. Then, step-by-step, we will explore OpenGL in depth by crafting some three-dimensional models. In this chapter, we will start learning by using the two-dimensional model project, and then we will enhance the project to accommodate three-dimensional models.