When I do the “ask me a question” things, I generally stick to questions I can actually answer. But in this case I think what the curious person is looking for is a rough overview, not a detailed white paper. This being the case, I think I can help. As always, remember that my understanding is probably a few years out of date.
Reader Kronski asks:
I don't know if you've seen this video.
It's demonstration of a physics engine where a truck gets banged up all to hell. My question is, how does a physics engine like this work?
So you don’t have to head over to YouTube, the video in question is this one:
| Link (YouTube) | 
The basics of a physics engine are easy to grasp. The finer details are beyond me. Let’s start with the essentials. You can see the ultimate demonstration of basic physics at work in the bridge builder game.
The idea is pretty simple: It’s a simulation of points in space. You have a bunch of points and you subject them to gravity and collision. The trick is that you link the points together. Let me swipe a screen shot from the bridge game:
Continue reading 〉〉 “Physics Engine”
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