This Sunday I was asked about how often I use the schoolar math in my job? The answer is "Every day".
Here it is, working example - cartoon water shader made today from scratch, for one of my battle projects. Such kind of water is very useful in mobile games in hyper-casual genre, which is really popular now.
Of course, its just a first try, there is a lot to improve and optimize, and I'll probably do it soon - so stay tuned and don't miss the updates.