Let’s summarize what we learned in this chapter:

• We saw how we can leverage matrix stacks to preserve global transformations while applying local transformations.
• We covered the basic concepts behind object animations in WebGL. More specifically, we learned about the differences between local and global transformations.
• We learned about the requestAnimationFrame browser and built our own version with JavaScript timers for animation.
• An animation timer that is not tied up to the rendering cycle provides a lot of flexibility by ensuring that the time in the scene is independent of how fast it can be rendered on screen.
• We distinguished between animation and simulation strategies for various problem-solving approaches.
• We looked at interpolation methods and their various approaches.

In the next chapter, we will play with colors and blending in a WebGL scene. We will study the interaction between objects and light colors, and learn how to create translucent objects.