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Lecture 19: Intro to Physical Simulation (11)
mooreyeel

I don't think this is an issue with real life springs no? Springs don't just bli out of existence, so why don't we implement how springs act in real life as close as possible?

bennyd87708

@mooreyeel That is precisely what we do by accounting for the rest length in the equation on slide 13. I believe that this is here to show the sort of building blocks on the journey towards a realistic spring model. First, we start out by defining two points that want to pull towards each other, we realize that although this works, it has a tendency to collapse on itself, so we then add the necessary components to our implementation to ensure that our spring has a preferred rest length, just as real springs do. That model then has the issue of tending to oscillate forever without coming to rest, and so we must continue to improve on it so on and so forth.

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