One of the things I love about encountering things like this on HN are comments like these, which are even more informative than the original post. I'd seen the

One of the things I love about encountering things like this on HN are comments like these, which are even more informative than the original post. I'd seen the demo in the OP, and thought, "neat". Later on, I read comments that say, "Oh, you just need to ___ the ___ with ___, and use ___'s Law to ____ for the whole grid" --- most of which is completely over my head. In some perspectives this might seem discouraging -- trivializing the difficulty of learning it. However, I find it tremendously invigorating: the idea that it's simple for someone with the right learning and knowledge means that it's something I could do to, if I wanted to spend the time to learn it. Thanks for posting comments like this. It opens my eyes to questions I didn't even know I had. ("What's a verlet?" "Oh man, I need to re-learn my linear algebra someday...")