Summary

In this chapter, we’ve taken a bit of time to focus on how rendering is performed and examined the rendering pipeline and camera setups. A thorough understanding of how these affect the positions and projections of objects in the environment is critical to your understanding of the structure of a 3D environment and the relative locations of drawn artifacts. In addition, considerable time has been spent on elucidating the calculations involved in taking a world vertex position and projecting it onto the screen. The process is not as straightforward as it might first seem, but with a knowledge of basic trigonometry and mathematics, the formulae have been derived.

One common issue that I find when developing these types of applications is just knowing how to debug the code when it seems to be running without syntax errors but nothing appears on the screen. Most often, the issue is that the camera cannot see the object. Therefore, if you can visualize in your mind where...