Adding a Visual Selection
Welcome to Chapter 3! In the previous chapter, we offloaded the majority of matrix and vector calculations to the GPU. A modern graphics card has more (and also more specialized) computing cores than a desktop CPU, so, moving the compute load to the GPU will free the main CPU from most of the animation work.
In this chapter, we will add a couple of simplifications when working with a lot of model instances. After the changes in the previous chapter, we are able to display thousands of model instances on the screen, but selecting a specific instance is still hard. We will start by adding coordinate arrows to identify the currently selected instance. Next, we will add a function that allows us to center the specified instance in the middle of the screen. Then, a graphical highlight will be created, further helping us to find the selected instance among all instances. As the last step, we will add a model without triangles, and an instance from this empty...
